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June 20, 1950
R. ALTHOFF
-
2,512,048
1m: mu MECHANISM
Filed Oct. 18, 1947
v 4 sheets-sheet 1
7203
24.
IN
BY
TOR
June 20, 1950
R. ALTHOFF
2,512,048
BAG FEED MECHANISM
Filed Oct. 18, 1947
4 Sheets-Sheet 2
____\;_______
___.___L__.—
I
Q
INVENTOR
and Hlthoff
$3235”:
' Mr
ATTO
June 20, 1950
R. ALTHOFF
2,512,048
BAG FEED MECHANISM
Filed Oct. 18, 1947
4 Sheets-Sheet 3
G5
|m||||||| um s-i r
G Ill’ll
INVENTOR
Patented June ‘20,’ 1950
2,512,048
‘UNITED STATES P...
er OFFICE
2,512,048
BAG FEED MECHANISM
Raymond Althoif, Brooklyn, N. Y., assignor to
Bagomatic, Incorporated, Brooklyn, N. ‘2., a
corporation of New York
Application Gctober 1s, 1947,"S‘eria'l‘No. 780,665
17 Claims.
(Cl. 112-10) I
1
This invention relates to automatic bag sewing
machinery and more particularly to apparatus
2
kept pace with the development of 'th'eise'wirig
machine itself.
>
for forming ‘the ‘free edges of a piece of bag ma
It is accordingly an object of the-presentin
terial such as, forv example, burlap into an export
vention to provide improved apparatus ifor-‘form
seam adapted to be sewed by a sewing machine.
ing a folded sea‘min- apiece of bag material that
In-the manufacture of sewed bags it is the usual
is‘to be-"sewed in’ a sewingmachine. IItJis a‘rlfu‘r
practice to sew the bag inside out and then re
ther obiect of the invention to ‘provide such '~-a
verse the bag before it is ?lled with the material
seam-former that» is capable of- operating-at aahi‘gh
that is to be packed in the bag. The manufac
rate of speed. lt‘isanotherfobject 'ofl-the‘finve'n
10
turing operation is commonly carried out by fold
tion to provide-a ‘seam vforr'n‘er=of~this character
inga piece ofbag-material in half, sewing the free
that is simple‘in construction and-‘accurate ‘and
edges opposite the fold to form a side seam, sewing
reliable in operation. Other objects =oflth‘elin
another pair of edgesto form a bottom seam, and
vention-will be-in part obvious and in partlpoin-ted
then turning the bag inside out. In order to pro
out ‘hereafter.
vide additional strength,'it is frequently desirable 15 The many objects and advantages iof' the-pres
to make either the side seam or the bottom seam,
en't invention may. best be appreciatedlbylrefe'r
or both, a s'o-called “export” seam.
ence to the accompanying ldrawings'iwhich illus
The nature of an export seamand the general
trate apparatus incorporating a preferred em‘
purpose of the present apparatus when applied
bodiment of the invention and wherein:
to the making of such a seam may be conveniently 20
1 Figs. 1 and v2,- aspreviously described, are cross
illustrated and explained by referense to Figs. 1
sections of a piece of bag- material before it enters
and-2 of the accompanying drawings which show,
the present ' apparatus and after :it leaves ‘the
respectively, the manner inwhich a piece of bag
present-apparatus respectively;
material is folded before beingfed to a preferred
Fig. .3 is a general side: elevation of .theipresent
embodiment of the present apparatus to form a 25 seam former, vshowing its normal position with
side seam of'the bag, and “the manner in which
respect-to that of the feed table-and sewing ‘ma
thematerial is folded after it leaves this embodi
chine presser-foot;
ment of the :apparatus. Fig. 1 shows in cross
Fig. 4 is a rear elevation of theseamion'ner,
section apiece of burlap l0, folded in half to form
showing ‘the drive shafts and gearing-for driving
the freee'dges ‘l2 and Ill. The burlap H! is fed 30 the >various'elements 'of the apparatus;
to-the apparatus shown in Figs. 3-11 of the draw
Fig. 5 is a top plan view of- the'liniterior of the
ings,>and described in detail ‘hereafter, and the
seam former showing the separator ‘disks, #the
free edges 52 and M are automatically folded in
fold-forming disks and the bag>material edge
such manner as to‘ form the export seam is shown
guides;
-
~
in Fig. .2 of the drawings. .The seam 16, which is 35 vFig. i6 is a vertical section throughithese'am
the'side seam of the bag, can then'besewed in
former, taken on thalinebB-t of Fig. 5 land-show
conventional sewing machine.
'
ing in ‘elevation the various parts depicted in
In order to justify its initial high cost, an auto
Fig. 7 5;
matic bag sewing machine must produce bags at
Fig. '7 is a vertical section taken on theline
a relatively high ratefas compared with thepro 40 'l—'l "of-Fig. 6 and showingithe manner: in which
duction rate ‘that is manually attainable, or at
the .foldeforming v.disks cooperate with oneian
tainable with the use of semi-automatic machin
ery. Moreover, this high rate must be achieved
without substantial reduction in the quality of
the work, since if an appreciable number of bags I
is misfolded or mis-sewed, the loss due to re
jected bags may offset the advantage of using
other;
I
.
»
Fig. 8 is a 1fragmentary section throughioneu'of
the separator ‘disk drive shafts, showing the-'man
ner in which the disengaging combs ‘are mounted
with respect ‘to the separator disks;
I 'Fig.-.9:»is a fragmentary section'taken on .theilllne
the automatic machine. In general it may be
9-i9:of ‘Fig. 6' andzshowing two of thedi‘sengaging
said that the principal limitation upon bag sew
comb adjusting rods;
.
ing machinery has been, not the sewing machine 50 Fig. -10 is a detail view ofthe adjacent portions
itself, but rather- the auxiliary apparatus for
forming and handling the bag. Industrial sew
ing machines capable of sewing at very high rates
are readily available, but the development of bag
of the 'uppereand lower separator .disks, showing
the manner in which ‘they separate'the'edgapor
tions of the'bag material; :and
Figs. 11, '12 and. Bare wsections taken'on-the
handling and bag forming machinery has not 55 lines 'll—-'ll, l2—-‘l2, and vl3—-l3‘respec‘ztively»‘of
2,512,048
3
4
Fig. 6 and showing the manner in which the fold
but with their teeth in staggered relation. That
forming disks and edge guides cooperate to form
the double fold that is sewed to give an export
is to say, the points of the teeth of the disks 48
are positioned opposite the spaces between the
seam.
teeth of the disk 52 and vice versa.
Referring to the drawings and more particu
larly to Fig. 3, the folded bag material II] is moved
down a sloping feed table I8 with the free edges
I2 and I4 extending rearwardly, and the material
is so positioned transversely of the feed table
that the edges I2 and I4 engage a feed roll 20. 10
The disengaging comb 44, previously referred
to, comprises a series of vertical disengaging
plates, the number and positions of the disen
gaging plates being such that a disengaging plate
is located on both sides of each separator disk 48.
The disengaging plates of comb 44 are mounted
As described more fully hereafter, the feed roll .
20 causes the bag material to be fed at a con
on a shaft 58 which is supported at its ends in
the casing 40 of the fold former, and are free to
rotate with respect to the shaft 56. Each of the
trolled rate to the fold former 22 wherein the
disengaging plates of the comb 44 is provided
edges I2 and I4 are folded to form the export
fold I6. The seam former 22 is provided with a 15 with 9. depending arcuate shearing edge 60 which
has a radius of curvature slightly greater than
longitudinal slot 23 through which a part of the
that of the separator disks 48. The comb 44 is
feed table I8 extends to support the main portion
normally so positioned that the teeth of the sep
of the bag material as it passes through the fold
arator disks extend somewhat below the bottom
former. This extension of feed table l8 into the
fold former is shown only in Figs. 5, '7 and 11-43 20 portions of the shearing edges ?ll of the comb,
whereas the upper portions'of the shearing edges
of the drawings, since in Fig. 3 and other ?gures,
extend beyond the disk teeth.
it tends to hide working parts of the fold former
The lower set of separator disks 52 is provided
that it is desirable to show.
with a disengaging comb 62 which is similar to
After the double fold I6 has been formed, it is
pressed and fed between the lower portion of feed 25 the comb 44 and is mounted on and rotatable
about a shaft 64. The disengaging plates of the
table I8 and a conveyor 24- in such manner that
comb 62 are provided with upwardly extending
the conveyer moves the bag material downwardly
arcuate shearing edges 65 which have radii of
along the lower portion of the feed table to and
curvature somewhat greater than the radii of
along a horizontal sewing table 26 to a sewing
machine. ' Since the sewing machine may be of a 30 curvature of the separator disks 52.
The manner in which the separator disks 48
conventional type, only the presser foot 28 of the
and '52 and combs 44 and 62 cooperate to separate
machine is shown in the drawings.
the edges of the bag material is best shown in
The construction of fold former 22 and the
Fig. 10 of the drawings. Referring to Fig. 10, as
mounting of feed roll 20 are best shown in Figs.
5, ,6 and 'l of the drawings. Referring to these
the bag material passes between the separator
?gures, the feed roll 20 is mounted on a rotatable
shaft 39 to which it is keyed by a key 32 in such
manner that the feed roll is rotated by the shaft
but can be positioned axially of the shaft. Shaft
rator disks 48 engage transverse ?bres of the up
per edge portion I2 of the bag material and the
disks 48 and 52 the peripheral teeth of the sepa
peripheral teeth of the lower separator disks 52
engage transverse fibres of the lower edge portion
l4 of the bag material. As the disks 48 and 52 are
rotated, the edge portions of the material are sep
mounted on a rotatable shaft 38 which extends
arated from one another. Upon continued rota
through and is supported by a journal bearing ‘Ill
tion of disks 48 and ‘52, the peripheral teeth of
and by a side wall of the casing 40 of fold former
22. ' Thus the feed roll 20 is movable with respect 45 the separatordisks gradually move into the spaces
between the plates of the combs 44 and 62 respec
to the fold former casing 40 and the feed table I8,
tively, and the edge portions of the bag mate
and may ride up over the bag material as the
rial are released by being pushed o? the teeth of
material passes between feed roll and feed table.
30 passes through and is supported by a journal
bearing‘ 34 that is ?xed to an arm 36 swivelly
the separator disks, or, in some cases, the trans
The feed roll is caused to bear against the upper
surface of the feed table, or of the bag material, 50 verse ?bres may be sheared by the cooperative
action of the separator disks and the disengaging
plates of the combs. In order to prevent the
edges I2 and I4 from coming together again when
roll 20 with the interior parts of the fold former,
they have been released from the separator disks,
the surface of the roll is provided with a series
of grooves 42 into which the ends of a series of 55 a guide 66 is provided having a leading edge 68
that extends partway between the two'sets of
vertical disengaging plates of a disengaging comb
separator disks as clearly shown in Figs. 6 and 10.
44 extend. The construction and operation of the
Referring again to Fig. 5 and also to Fig. 8, the
disengaging comb 44 is described more fully
disengaging plates of the comb 44 and the sepa
below. '
1 The feed table I8 extends through an opening 60 rator disks 48 are spring-pressed together. The
inner end of bearing 10 forms an abutment
46 in the fold former casing 40 to a point adjacent
against which the plates and disks are pressed
to the mechanism that separates the free edges l2
by a spring ‘I2 which bears against the front plate
and I4 of the bag material. This mechanism
of the comb 44 ‘and also against an adjusting
consists of two series of separator disks compris
by the action of gravity.
. Inlorder to ensure proper alignment of the feed
ing an upper set of toothed wheels 48 which are 65 nut 14 threaded onto a bushing 16 mounted on
the casing 40. By adjustment of the nut ‘I4 the
keyed to the shaft 38 by a key 50 and a lower set
tension of spring ‘I2 may be adjusted to regulate
of toothed wheels 52 that are keyed to a shaft 54
the force with which the separator disks 48 and
by .a key 56. The construction is such that the
disengaging plates of comb 44 are pressed to~
upper separator disks 48 and lower separator
disks 52 may be rotated by the shafts 38 and 54 70 gether. This force is so regulated as to ensure
proper shearing action and at the same time
respectively, but are axially movable with respect
permit rotation of the separator disks. Since
to these shafts. The disks 48 and 52 are posi
the disengaging plates of the comb 44 extend
tioned to engage respectively the upper and lower
into the grooves 42 of the feed roll 20, proper
free edges of the bag material and are arranged
with their peripheries tangent to one another, 76 alignment of the feed roll and separator disks
2,612,048
is" also ensured. The‘lower separator disks t2
and disengagingfplait'es "of ‘comb-i627 are ‘pressed
together "by' an adjustable spring ‘(not 'l'shown)
similarfto the spring ~12;
'
>
'
a
>
>
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'
- 1 ‘It is apparent thatlthe point of A disengagement
of the i'o‘ag material from ‘the separator disks is
determined 1hy the ‘relative-‘positions of the l-sepae
raltor disks 48 and the-cornice“ and also by ‘the
relative positions or ithe separator disk
and
the comb 62. In'order' to ‘regulate these points
of‘ disengagement, ithecombs' Mendez are-‘made
adjustable.» Referring to Figs. "'6 and!) of vthe
drawingsgeach of theJ‘di'sengagiing plates of- gc‘om'b
M lie-provided with a threaded adjusting screw
1-8’ having a lower endwvhich extends into ‘the
top of the disengaging plate'a’rfd is provided ‘with
a-g'ir-oove sea-mo ‘which the disengaging plate is‘
peened- t‘o>~provide~a~connedtionibetweenthe screw
that may beinterconnected with one :another as
shown in Fig. 7. The ‘disk In is mounted on is.
shaft i3-2 ‘that extends upwardly ‘through amov
able bearing I34'and-is provided at ‘its iup'perfe'h‘d
with a‘ driving gear 136. .The diskIZB :is ?xed
to a shaft 13s that extends‘ downwardly ‘through
a movable bearing I40 and is provided at its lower
end with ya driving gear 142. The forming mem
ber I lit] is fixed to a shaft I44. that extends‘Tthr-ough
an upper bearing ‘Hit and a-lower bearing I48. At
its upper-end shaft I44 is provided with a “driving
gear I56 that meshes with the gear ‘I38 and “at its
lower end shaft I44 is provided withia driving
gear I152 that meshes with the gear I42. All of
the disks I26, I23, HM and [33 are driven from
the drive shaft 92 through the bevel gear ‘t5’?!
?xed to the shaft ‘92 and the bevel gear I356 fixed
to the shaft 1M.
> '
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‘
and plate ‘ which permits -»'rotation of "they screw
~ The forming member I30 is ‘provided with-Ia
but prevents {axial-movements]? the screw relative‘v
deep central groove I58 through 'hich the guide
t6 passes. The guide "(it is provided with ‘upper
to‘the plate- Elachofithe?screws ‘18 passes through
a VnutJBlZ‘ fixed-inithe ‘casing iw‘of the-seam former
and extends upwardly-to the -'exterior of the ~c~a=s
ing.
:i'tsl-top-ea'chiser'ew 48 'is provided with'a
and lower projecting portions I68 and ‘IE2 which
serve to guide the upper edge iof‘th’e hag material
onto the upper surface of disk I3'I and lower
kerf ~81‘; by means of which ‘the screw-may be‘ 25 surface of disk I33 respectively. The main 'por;
rotated toposition the ‘disengaging plate of ‘the
tion of the bag material is supported on feed
comb ‘ii-ii.
shown» ineni'g. -8- the disengaging
table it and is guided by guide plates 61 and {69
plates of comb (stare provided'withicentralholes
between the disks 1-26 and I28». As shown in-iFi'gs.
86 which are somewhat larger in diameter-than
shaft 38 to permit the desired adjustment of the
‘l and 12 guide ‘plate E1 is provided Witha ‘hole
combats-“relative to the-shaft $8 and separator
disks 6,8. The lower =comb162 ‘is ‘provided ‘with’
similanadjusting screws 88‘ that are similarly ,
mounted» in the i?-xedsnuts-iiil and maybe rotated
to position the ‘disengaging. plates of ‘the comb
6?. relative to the separator disks 52».
. The drivingamechanismdfor ‘driving- the feed
roll as and separator disks 4~8~ and 152 is shown
its that ?ts over a ‘cylindrical projection I25 of
the disk 12% to ensure proper‘pos'iti'oriing of the
guide plate with respect to the diskéand guide
plate 69 is provided with a hole I21 that l?tsiover
a projection I29 of disk I28 for the same purpose.
Still referring to Figs. 7 and 12, ‘the disk [3|
is provided with a peripheral ‘forming groove 154
Which cooperates “with a peripheralformingsure
face or tongue M5 of the disk I26, and the ‘disk
its is provided with a peripheral groove I158
in Figs. sand 5 of the drawings. Referring to
these :figures, there is provided in the flower cen 40 which cooperates with the peripheral forming
tral portion-‘0f the fold former ‘22' a driveshaf-t
92 rotatably mounted in the’ casing 46 ‘and driven
by a suitable motor (‘not shown). Fixed i-to’the
drive shaft ‘92. there ‘is a bevel-gear seamen
engages a pair of bevel gears <96 and --98 ‘?xed to
surface or tongue I73 of (the disk I28. As the
upper layer of the bag material passes between
the disk I3I and disk 126, the forming surfaces.
i653 and its cause the edgeportion I4'ito'lbe folded
over to form an external fold. ‘Similarly, as ‘the
the ldiagonalshafts vlzlliland 4162 respectively.- The
lower layer of the bag materialipa'sses between
shaft It!) Jis-rotatably mounted on the ‘casing iii!
the disk I33 and the disk I218 the ‘lower edge.
by means of’ the» iournalbearings 194 and H33,
portionvl? of the bag material is folded over to
and the-shaft <l182~is~mountedin the journal bear-I
form a second external fold.
ings -I M~and~~ I to which are ?xedto-thecasing-so. 50
The forming disks I26 and 128 are spring
At its upper end shaft 4-92 is provided witha
pressed against the forming surfacesof mem
bevel gear _I-I~2 that vengagesa ‘bevel ~-gea-r lid on
the shaft -5ll-'whichdalso carries a gear H6 that»
meshes with asimilar gear LIII-B'on ‘the-shaft t8.
ber 33%) to ensure proper contact of the :fold
fold-forming - disks which comprise an upper» male 1
Referring to Figs. 6 and 13, afterleavingrthe
fold-forming disks ‘thee-main portion for the-bag
material continues ‘to pass between their-guide.
forming surfaces of the disks with the bagma
terial. Referring to Figs. -6 land 7 the movable
To ‘drive'the- feed trellis, ‘shaft ~38 is provided 55, hearing I34 is provided at its upper rend with
with a sprocket I28, and shaft ~30 is provided
the" projecting ears I12 that ?t into correspond-v
withia similar sprocket. I22, they-sprockets are;
ing grooves or tracks vHM formed in the casing
and I22 .being interconnected Joy a chain» I-Z-t in
to in such manner as to permittran'sverse slide.
such manner- thatthe feed 41011241 is - driven from
ing movement of the bearing. .A vcompression.
shaft38... Thus-the feed “roll 20 and shafts ‘38 60 spring IlG bears against the upper portion of
andstli ‘which carry the separator disks ??land
the bearing I34 and also against the casing-‘d9
52 respectively are positively interconnected to
to cause the bearing I34‘; to be urged toward the
ensure proper synchronization thereof.
bearing M6 and ‘to cause the iforming'isurfa'ce
. After the free edges of the bag material have
Hi3‘ of disk I26 to-exert 'a predetermined force
beenseparated, they are folded .tolform .a double 65 on the forming surface-£531 of *dis‘k . at; \.The;
fold. .as shown in .Figure2 which is then sewed
movable bearing \I 4'6 :i'sipr'o-vided with similar ears
to produce the exportseam. Referring particu
I'I8 that ?t into grooves 1.80 toiperrnit transverse.
larly to Figs. 6, 7 and 11 of the drawings, the
sliding movement-1 of the hearing MB and>a spring a
mainpo-rtion of. the bag-material passes between
I82 similar ‘to thespring Hie-urges the iformi-ng
the. guide plates?l and 69 and the free edges of 70 surface of disks ‘AI 2-8 against the forming surface
the bag ~material :pass over the guide 66 to the
!68 of disk I33.
fold-forming diskv 12-5, a lower vmale , fold-forming
disk I28, and a female fold-*formingmember 13d
comprising an upper disk I3 I ‘and lower disk I 3.3,
plates 6? and ESFWhich .cause'theibag material;
2,612,048
to continue in a desired straight line direction
and prevent the material from being carried
around with the fold-forming disks as they ro
tate. The folded edges of the material pass
through a forming guide I84 having arms I85
and I81 that overlap the edge portions of the
guide plates 81 and 69 and guide the edge por
tions of the bag material to complete the forma
tion of the double fold. The folded edges leave
the discharge ends of forming guide I84 and 10
guide plates 61 and 69 and pass between a pair
forming surface I68 of disk I33 cooperate to
cause an external fold to be formed in the free
edge I6 of the bag material. The folds thus
formed are brought into contact with one an
other again at the discharge end of the guide I84
and pressed ?rmly together by the press rolls
I86 and I88. ‘The export fold thus formed passes
onto the lower portion of feed table I8 and is fed
by conveyer 24 to the presser foot 28 of a sew
ing machine which sews the fold.
It has been found that the apparatus described
is capable of operating at relatively high speeds
of press rolls I86 and I88. The upper press
to form an export fold accurately and reliably.
roll I86 carries the conveyer 24 and causes the
The separator disks give a positive separation
bag material'to be moved onto the lower por
tion I8 of the feed table and out of the fold 15 of the edges of the bag material and the disen
gaging combs ensure proper disengagement of
former casing 40 through a slot I98. The feed
the edges of the material after they have been
table I8 is provided with a knife edge I92 that
separated. The separator disks provide a sim
bears against the surface of lower roll “£8 to
ple and positive method of forming the desired
make sure that the bag material is properly fed
onto the feed table I8.
20 folds in the material to form an export fold.
Since many embodiments might be made of
The press rolls I86 and I88 and conveyer 24
the present invention and since many changes
are driven from the main drive shaft 92. Re
might be made in the embodiment disclosed
ferring to Figs. 4, 5 and 6, the shaft I88 is pro
herein, it is to be understood that the foregoing
vided at its upper end with a bevel gear I94 that
meshes with a bevel gear I96 mounted on a shaft 25 description is to be interpreted as illustrative
only and not in a limiting sense. Numerous modi
I98 to which the press roll I88 is keyed by a
key 208. The shaft I98 also carries a, gear 282
?cations within the scope of the invention will
be apparent to those skilled in the art.
which meshes with a gear 284 ?xed to a shaft
I claim:
206 to which the press roll I86 is ?xed by a key
1. In apparatus for forming the free edges of a
208. Thus the press rolls I86 and I88 and con 30
veyer 24 are positively connected to the main
piece of folded bag material into a double fold
adapted to be sewed by a sewing machine to
drive shaft 92 through which they are also con
nected to the other moving parts of the appa
form an export seam, in combination, separating
means for separating said free edges of said bag
ratus.
The operation of the above-described appa 35 material, ?rst fold-forming means for receiving
ratus is largely apparent from its description.
one of said free edges of said material from said
separating means and forming a fold in said
The folded bag material I8 is moved downward
free edge, second fold-forming means for receiv
ly on the feed table I8 until the free edges of
ing the other of said free edges of said material
the folded material engage the feed roll 28. It
is then moved at a controlled rate into the fold 40 from said separating means and forming a fold
in said other free edge, ?rst guide means posi
former 22 through the opening 46 in the casing
tioned between said separating means and said
46 of the seam former. As the material passes
fold-forming means to maintain said two free
between the upper and lower sets of separator
edges of said material separated as said material
disks 48 and 52 the peripheral teeth of the sep
arator disks engage transverse ?bres of the upper 45 passes from said separating means to said fold
iorinlng means, disengaging means for disengag
and lower layers of the bag material respectively
ing said edges from said separating means when
and separate the free edges of the material. The
said edges have begun to pass over said ?rst
edges of the bag material adhere to the separator
guide means, second guide means for guiding
disks until they have passed to a point beyond
said edge folds from said first and second fold
the leading edge 68 of the guide 66 and are then
disengaged by the combs 44 and 62 respectively.
The separator disks and disengaging plates of
f'orming means into contact with one another
and pressure-exerting means for pressing said
folds together to form said double fold.
the combs are held in ?rm contact with one
2. In apparatus for forming the free edges of
another by adjustable springs so that if the
transverse ?bres are not pushed off the teeth of 66 a piece of folded bag material into a double fold
adapted to be sewed by a sewing machine to form
the separator disks, they will be sheared by the
cooperative action of the disengaging plates and
an export seam, in combination, separating
the teeth. The disengaging combs are made ad
means for separating said free edges of said bag
justable to ensure that the bag material will
material, ?rst fold-forming means for receiving
be disengaged from the separator disks only 60 one of said free edges of said material from said
after it has passed beyond the leading edge 68
separating means and forming a fold in said free
of the guide 66.
edge, second fold-forming means for receiving
The main portion of the bag material moves
the other of said free edges of said material from
along an extension of feed table I8 between the
said separating means and forming a fold in said
guide plates 61 and 68 and the fold-forming disks
other free edge, ?rst guide means positioned be
I26 and I28, whereas the separated edge portions
tween said separating means and said fold-form
of the material are guided by the upper and
ing means to maintain said two free edges of
lower projecting portions I68 and I62 in such
said material separated as said material passes
from said separating means to said fold-forming
manner that they ride over the upper surface of
seam-forming disk I3I and the lower surface of 70 means, disengaging means cooperating with said
separating means to disengage said edges of said
the fold-forming disk I33. The forming surface
material from said separating means, said dis
I66 of disk I26 and forming surface I64 of disk
engaging means being adjustable with respect to
I3I cooperate to cause the edge portion I4 of
said separating means and said ?rst guide means
the bag material to he formed into an external
told. and the forming surface Ill) or disk I28. and II to ensure disengagement of'said material from
2,512,048
9
10
said separating means after said- material has
passed» the leading edge of said ?rst guide means,
second toothed wheel means and forming an ex
3. In apparatus for forming the free edges of a
piece of‘ folded bag material into an export double
fold adapted to be sewed by a sewing machine to
form an export seam, in combination, ?rst rotata
ble toothed. wheel means positioned to engage
one free edge of said bag material, second ro
ternal fold in said other edge, ?rst guide means
positioned between saidtoothed wheel means and
said fold-forming means to maintain said edges
separated from one another as they pass from
said- separating means to said fold-forming
means, disengaging means for disengaging said
edges from said toothed wheel means after said
edges have begun to pass over said ?rst guide
means, adjusting means for adjusting the posi
tion of said disengaging means with respect to
said toothed wheel means and said ?rst guide
means to ensure disengagement of said material
tatable toothed wheel means positioned to en
gage the other 'edge of said bag material, means .
for rotating said ?rst and second toothed wheel
means to cause‘said toothed wheel means to sep
terial has begun to pass over said» ?rst guide
means, second guide means for guiding the folds
formed by said ?rst and second foldlforming
arate said edges from one» anothen?rst fold
means into contact with one another and pres
f'orming- means for receiving one of said free
edges ‘of said material‘ from‘ said ?rst toothed
wheel meansland forming an external fold in
sure-exerting means‘ for receiving said folds from
‘said second guide means and pressing said folds
together to form said double fold.
6. In apparatusv for forming the free edges of a
piece of folded bag material‘ into a double fold
adapted to be sewed by a sewing machine to form
second guide means for guiding said edge folds
from said'?rst and second fold-forming means
into contact with one another and pressure-ex
erting means for pressingsaid folds together to
form said double seam.
said edge, second fold-forming means for re
ceiving the other of said free edges from said
second toothed wheel‘ means and forming an ex
from said toothed Wheel means after said ma
ternal fold in said other free edge, guide means 25 an export seam, in combination, a ?rst series of
forguiding said edge folds from said ?rst and sec
coaxial toothed wheels positioned to engage one
ond forming- means into- contact with one an
side of said folded bag material at one'of the free
other and pressure-exerting means ‘for receiving
edges thereof, a second series of co-axi'al toothed
said’ edgefolds from, said guide’ means and press
wheels positioned to engage the other side oflsaid
ing said folds together to form said double fold.
=1“. In apparatus‘ for‘f'orming the‘ free edges of
folded hag material near the other free edge
thereof, means for rotating said toothed wheels
a piece of folded‘: bagymaterial‘ into a double fold
to cause said toothed wheels to separate said free
edges of said bag material, ?rst fold-forming
means for receiving one of said free edges of
‘said material from said first series of toothed
adapted: to be sewed by'a, sewing machine to form
an export seam, in combination, ?rst toothed
Wheel means positioned to'engage'» one free edge
of ‘said bag‘ material‘, second toothed wheel means
positionedv to~ engage; the other free edge of said
material, means-for rotating said ?rst and second
wheels and forming an external fold in said’ free
edge, second fold-forming means for '7 receiving
the other of said‘ free edges from said-second
toothed wheel means‘ to cause" said toothed wheel
means to: separate. one of said, edges from the ‘
other edge; ?rst fold-fanning means for receiv
ing one of said» free edges from: said ?rst toothed
wheel means and forming an external fold in
series of co-axial' toothed wheels and forming an
external fold in said‘ other edge of said material,
guide means‘ for‘ guiding the edge folds’ formed
by said ?rst and second fold-forming means into
contact with'one- another and pressure-‘exerting
said edge, second fold-forming'means for receiv
ing‘ the other edge of said loagmaterial from
said. second: toothed wheel meansand forming an
external fold iii-said.’ other'edge, ?rst guide means
positioned between said. toothed’ wheel means and
said fold-forming means‘t'o maintain‘ said edges
means for receiving said folds from said guide
means and‘ pressing said folds together to form
said double fold.
'7. In apparatus for'forming the free edges of'a
piece of folded‘ bag material into a double fold
adapted to be sewedby a sewing machine to fiirm
separated? from one‘ another as: they pass from
a double fold‘, in combination, a ?rst series of ‘ co->
said toothed wheel‘ means to‘ said fold-forming
means; disengaging’ means for disengaging said
edges from‘ said toothed wheel‘ means’ aftersaid
axial toothed wheels positioned to engage‘ one
side of said folded bag’ material at one‘of the free
edges thereof, a second series of co-axialtoothed
wheels positioned to" engage the other side of ‘said
folded bag material near the other ‘free edge
thereof, means for rotating said toothed wheels
to cause said toothed wheels to' separate, ‘said
edges have. begun to pass over sai ‘ ?rst guide
means, second? guide means for- guiding’the folds
formed by» said: ?rst and second‘ fold-forming
means into: contact with“ one another- and pres
sure-exerting means;formecei‘vingv said folds from
said second: guide: means and pressing said folds
together to form said double fold.
~
5-. In apparatus for forming the free edges of
a: pieceof: folded bag material into a double fold
adapted to be sewed by a sewing machine to form
an export seam; in combination, ?rst toothed
free edges of said‘bag material, ?rst fold-forming
means for receiving one of said free edge‘siof
said material from said‘ ?rst‘ series of toothed
wheels and formingv an: external fold in‘ said: free
edge, second fold-forming means for receiving. the
other’oi said free edges from saidsecondseries of
co-axial toothed wheels’ and forming an, external
wheel means positioned to’ engage one free edge 11;, fold in said other ed'ge'of said material, a?rst
of- said bagxmaterial; second toothedwheel means
series of disengaging members positionedibetween
positioned to engage the other free’ edge of said
the toothed wheelsofl said ?rst series of Itoothed
material; meansfor rotatingsaid ?rst and second
wheels andadaptedf to‘ cooperate therewith to dis
engage said material from, said‘ toothed wheels
toothed wheel means-to cause said toothed wheel
means to separate one- of- said‘ edges from the , ; after said free edges'have'been separated, a sec
1
otherfedge, ?rst fold-forming means for receiving
one: of said free: edges from said ?rst toothed
ond series of disengaging members positioned be
tween the toothedwhe'el'slof said second'series of;
wheel means anrlforming an external fold in said
wheels and adapted to cooperate with said second
edge, second. fold-eforming means for receiving
series of wheels‘ t‘oiseparat'e'the other‘of said free
the. other edge of said bag material" from said as edges frornlsaid secondseries‘of wheels after said
2,512,048
12
the folds formed by said seam-forming disks
free edges have been separated, guide means for
guiding the folds formed by said ?rst and second
into contact with one another and pressure-ex
erting means for receiving said folds from said
guide means and pressing said folds together to
form said double fold.
fold-forming means into contact with one an
other, and pressure-exerting means for receiving
said folds from said guide means and pressing
said folds together to form said double fold.
8. In apparatus for forming the free edges of
a piece of folded bag material into a double fold
adapted to be sewed by a sewing machine to
form a double fold, in combination, a ?rst series
of co-axial toothed wheels positioned to engage
one side of said folded bag material at one of
the free edges thereof, a second series of co-axial
toothed wheels positioned to engage the other
side of said folded bag material near the other
free edge thereof, means for rotating said toothed
wheels to cause said toothed wheels to separate
said free edges of said bag material, ?rst fold
forming means for receiving one of said free
edges of said material from said ?rst series of
toothed wheels and forming an external fold in
said free edge, second fold-forming means for re
ceiving the other of said free edges from said
second series of co-axial toothed wheels and
forming an external fold in said other edge of
said material, a separating member mounted be
tween said toothed wheels and said fold-form
ing means for maintaining said free edges sep
arated from one another as they pass from said
toothed wheels to said fold-forming means, said
separating memberhaving a leading edge ex
tending to a point between said ?rst and second
series of toothed wheels, a ?rst series of dis
engaging
members
positioned
between
10. In apparatus for forming the free edges
of a piece of folded bag material into a double
fold adapted to be sewed by a sewing machine
to form an export scam, in combination, sep
10 arating means for separating said free edges of
said bag material, a ?rst pair of rotatable fold
forming disks adapted to receive therebetween
one separated edge of said bag material from
said separating means, a second pair of rotatable
15 fold-forming disks adapted to receive therebe
tween the other separated free edge of said ma
terial from said separating means, one disk of
each of said pairs of disks having a peripheral
groove and the other disk of each of said pairs
20 of disks having a peripheral tongue cooperating
with the groove in said other disk to cause bag
material passing between said disks to be folded
in an external fold, means for rotating said ?rst
and second pairs of disks to form said external
80
the
toothed wheels oi.’ said ?rst series of wheels for
disengaging said one free edge of said bag ma
terial from said ?rst series of wheels, a second
series of disengaging members positioned between
the toothed wheels of said second series of
toothed wheels and adapted to cooperate with 40
the toothed wheels of said second series to dis
engage said other edge of said material from
said second series of wheels, ?rst adjusting means
for adjusting the position of said ?rst series of
disengaging members with respect to said ?rst 45
series of toothed wheels to ensure disengage
ment of said material from said ?rst series of
toothed wheels after said material has passed
said leading edge of said separating member,
folds in said free edges of said material, guide
means for guiding the edge folds formed by said
seam-forming disks into contact with one an
other and pressure-exerting means for receiving
said folds from said guide means and pressing
said folds together to form a double fold.
11. In apparatus for forming the free edges
of a piece of folded bag material into a double
fold adapted to be sewed by a sewing machine
to form an export seam, in combination, sep
arating means for separating said free edges of
said bag material, a ?rst pair of rotatable fold
forming disks adapted to receive therebetween
one separated edge of said bag material from
said separating means, a, second pair of rotatable
fold-forming disks adapted to receive therebe
tween the other separated free edge of said ma
terial from said separating means, one disk of
each of said pairs of disks having a peripheral
groove and the other disk of each of said pairs
of disks having a peripheral tongue cooperating
with the groove in said other disk to cause bag
material passing between said disks to be folded
in an external fold, means for rotating said ?rst
and. second pairs of disks to form said external
folds in said free edges of said material, resilient
second adjusting means for adjusting the po 50
force-exerting means positioned to exert a
sition of said second series of disengaging mem
bers with respect to said second series of toothed
resilient force on one disk of each of said pairs
wheels to ensure disengagement of said material
of disks to hold the disks of each pair of disks
from said second series of said toothed wheels
in resilient contact with one another, guide
after said material has passed said leading edge of
means for guiding the edge folds formed by said
fold-forming disks into contact with one another
said separating member, guide means for guid
and pressure-exerting means for receiving said
ing the edge folds formed by said ?rst and sec
ond fold-forming means into contact with one
folds from said guide means and rpressing said
another and pressure-exerting means for receiv
folds together to form said double fold.
ing said folds from said guide means and press
12. In apparatus for forming the free edges
ing said folds together to form said double fold.
of a piece of folded bag material into a double
9. In apparatus for forming the free edges of
fold adapted to be sewed by a sewing machine
a piece of folded bag material into a double fold
to form an export seam, mechanism for sepa
rating said free edges from one another compris
adapted to be sewed by a sewing machine to form
an export seam, in combination, separating 65 ing, in combination, ?rst rotatable toothed wheel
means for separating said free edges of said
means positioned to engage one side of said bag
bag material, a ?rst pair of rotatable fold-form
material near one of said free edges, second ro
ing disks adapted to receive one of said sep
tatable toothed means positioned to engage the
arated free edges of said bag material there
other side of said folded bag material near the
other free edge thereof and means for rotating
between, a second pair of rotatable fold-forming
disks adapted to receive the other separated free
said ?rst and second toothed wheel means to
cause said toothed wheel means to separate said
edge of said bag material therebetween, means
for rotating said two pairs of disks to cause
free edges of said folded bag material.
13. In apparatus for forming the free edges of
said disks to form external folds in said free
edges of said material, guide, means for guiding 75 a piece of folded bag material into a double fold
2,512,048
13
adapted to be sewed by a sewing machine to
14
disengaging members to vary the point at which
form an export seam, mechanism for separating
said material is disengaged from said ?rst series
said free edges from one another comprising, in
of toothed wheels, second adjusting means for
combination, ?rst rotatable toothed wheel means
adjusting the position of said second series of
positioned to engage one side of said folded bag
disengaging members to vary the point at which
material near one of said free edges, second ro
said material is disengaged from said second
tatable toothed wheel means positioned to engage
series of toothed Wheels, and means for rotating
the other side of said folded has material near
said ?rst and second series of toothed wheels to
the other free edge thereof, means for rotating
cause said toothed wheels to separate the free
said toothed wheel means to cause said toothed 10 edges of said folded material.
wheel means to separate said free edges of said
16. In apparatus for forming the free edges of
bag material and disengaging means cooperating
a piece of folded bag material into a double fold
with said toothed wheel means to disengage said
adapted to be sewed by a sewing machine to form
bag material from said toothed wheel means after
an export seam, mechanism for forming a fold
said free edges have been separated.
15 in each of said free edges of said free material
14. In apparatus for forming the free edges of
comprising, in combination, a ?rst pair of ro
a piece of folded bag material into a double fold
tatable disks mounted with their peripheries in
adapted to be sewed by a sewing machine to form
contact with one another and adapted to receive
an export seam, mechanism for separating said
one free edge of said bag material therebetween, a
free edges from one another comprising, in com 20 second pair of rotatable disks mounted with their
bination, a ?rst series of co-axial toothed wheels
peripheries in contact with one another adapted
positioned to engage one side of said folded bag
to receive the other free edge of said bag material
material near one of said free edges, a second
therebetween, one disk of each of said pairs of
series of co-axial toothed wheels positioned to
disks having a peripheral groove and the other
engage the other side of said folded bag material 25 disk of said pairs of disks having a peripheral
near the other of said free edges, a ?rst series
tongue cooperating with the groove in the other
of disengaging members positioned between the
disk of said pair to cause bag material passing
toothed wheels of said ?rst series of wheels and , between said disks to be folded into an external
adapted to cooperate with said toothed wheel to
fold, and means for rotating said ?rst and second
disengage said one free edge of said material from 30 pairs of disks to form said external folds in said
said toothed wheels after it has been separated
free edges of said material.
from said other free edge, a second series of dis
17. In apparatus for forming the free edges
engaging members positioned between the
of a piece of folded bag material into a double
toothed wheels of said second series of toothed
fold adapted to be sewed by a sewing machine
wheels and adapted to cooperate with the toothed 35 to form an export seam, mechanism for forming
wheels of said second series to disengage said
a fold in each of said free edges of said free
other free edge of said material from the toothed
material comprising, in combination, a ?rst pair
wheels of said second series when said other edge
of rotatable disks mounted with their peripheries
has been separated from said one edge and means
in contact with one another and adapted to re
for rotating said toothed wheels to cause said
ceive one free edge of said bag material there
toothed wheels to separate said free edges of said
between, a second pair of rotatable disks mounted
material.
with their peripheries in contact with one an
15. In apparatus for forming the free edges of
other adapted to receive the other free edge of
a piece of folded bag material into a double fold
said bag material therebetween, one disk of each
adapted to be sewed by a sewing machine to form
of said pairs of disks having a peripheral groove
an export seam, mechanism for separating said
and the other disk of said pairs of disks having a
free edges from one another comprising, in com
peripheral tongue cooperating with the groove
bination, a ?rst series of co-axial toothed Wheels
in the other disk of said pair to cause bag mate
positioned to engage one side of said folded bag
rial passing between said disks to be folded into
material near one of said free edges, a second
an external fold, spring means for urging one
series of coaxial toothed wheels positioned to en
disk of each of said pairs of disks into contactv
gage the other side of said folded bag material
with the other disk of said pair, to provide a
near the other of said free edges, a ?rst series
resilient contact between said disks and means
of disengaging members positioned between the
for urging the disks of said ?rst and second pairs
toothed wheels of said ?rst series of wheels and
of disks to form said external folds in said free
adapted to cooperate with said toothed wheel to
edges of said material.
disengage said one free edge of said material
RAYMOND ALTHOFF.
from said toothed wheels after it has been sepa
REFERENCES CITED
rated from said other free edge, a second series
of disengaging members positioned between the 60 The following references are of record in the
toothed wheels of said second series of toothed
?le of this patent:
wheels and adapted to cooperate with the toothed
UNITED STATES PATENTS
wheels of said second series to disengage said
Number
Name
Date
other free edge of said material from the toothed
wheels of said second series when said other edge
139,378
Earle ____________ .._ May 27, 1873
has been separated from said one edge, ?rst ad
1,524,190
McNeil __________ .__ Jan. 27, 1925
justing means for adjusting said ?rst series of
1,636,517
Krasa ___________ .. July 19, 1927
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