US1625781A - Sewing, severing, and seam-reenforcing machine - Google Patents

Description

April 26; 1921. 1,625,781

M. BATES ET AL sswme, SEVERING, AND SEAM RsEnFoRcING MACHINE Filed Feb. 1, 1923 4 sheets-sheet 1 April 26, 1927. 1,625,781

A. M. BATES ET AL SEWING, SEVERING, AND SEAM REENFORCING MACHINE Filed Feb. 1, 1923 4 Sheets-Sheet z INVENTURS April '26.!1927.

SEWING, SEVERING, AND SEAM REJENFORCING MACHINE Fi led Feb. 1, 1923 4 Sheetg-Shqet s u|| ||m I lllll 47 INYENT uRs Wm W M 1,625,781 A. M. BATES ET AL April 26,1927.

A. M. BATES ETAL SEWING, SEVERING, AND SEAM REENFORCING MACHINE Filed Feb. 1, 1923 4 Sheets-Sheet, 4

.INYENTURS mm. (3.1; W MAM.

' work support.

PatentedApr. '26, 1921. v

UNITED "STATES PATENT OFFICE! ADELMEB M. BATES AND ALBERT KRASA, OF CHICAGO, ILLINOIS, ASSIGNOBS TO BATES VALVE BAG COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF WEST VIR- GINIA.

SEWING, SEVERING, AND 'SEAM-REENFOBCING MACHINE.

Application filed February Our invention relates toan improved sewing, severing and seam reenforcing machine. More specifically, it relates to improvements in amachine for sewing-a reenforced closing seam across the top of a filled bag, and cutting off the walls of the bag beyond the seam. V

The objects of our invention are to provide a new and improved mechanism for si Inultaneously and automatically feeding reenforcing strips to a bag closure, stitching a seam through said strips and the bagwalls to close the bag and secure the stripsin place as reenforcements for the seam, and cutting off the surplus bag 'material beyond and parallel with the seam. The features of improvement will appear as the description proceeds, and are pointed out. in the appendv ed claims. The preferred embodiment of our invention is illustrated in the accompanying drawings, in which:

Figure 1 is a perspective view of the assembled machine Fig. 2 is an end View of the sewing and severing means, looking from beneath in Fig. 1; Fig. 3 is a section on line 3-3 of Fig. 1; Fig. 4 is a section on line 44 of Fig. 2; Fig. 5 is a section on the line 5-5 of Fig. 4, but showing the knife bar lowered; Fi 6 is a plan View of the throat plate; Fi is a sectional 'view of the adjusting c amp for the work support, and Figs. 8 and 9 are a plan view and side elevation, respectively, of a modified form of The device consists of a pedestal A, upon which are mounted a sewing and severing machine 13, .a motor (1' for o crating the machine, and a work support The sewing machine has a needle 10 with .5.

common form of needle operating means and 'a thread supply, which need not bedescribed here. The needle works through a presser foot 11 and throat plate 12. The presser foot and throat plate have guides 13 14 for reenfo-rcing-strips 15 16, which are fed to opiosite sides of the seam whichis being sewn.

. he reenforcing strips are moimted 1n rolls on supports 17 18, carried by the pedestal A. The throat plate, as. shown in Fig. 6, has aneedle slot 19, a reenforce feeding slot 20,

1, 1923. Serial No. 616,372.

feedingslots 21 22, and a cutter slot 23. The throat plate strips 24 25, on each side of the cutter slot, are toothed for a purpose which will be stated later.

Beneath the needle and on-the end of the opprating shaft 26 there is a sin le loo er 27. T c feed dogs 28 29, working t iroug slots 21 22 in the throat plate, are carried by a hlock30, which is fastened by means of a screw 31' to a carrying plate 32.

The shaft 26 carries an eccentric 33, surrounded by an end of a link 34, which end fits in a horizontal slideway ina block 35. This arrangement transmitsvertical movement from eccentric 33-to block 35. The block 35 has-a depending lug 36 channeled, as shown at 37, in .F i 5. The feed-dog carrying plate 32 is c amped against the channeled face of the lug 36, as by means 0 screws .38 and 39 passing through the face plate and into the ends of a bar 40, on the other side of the lug. In this Way the plate may be adjusted on the lug and at the same time forms aside for the channel 37. This channel 37 constitutes a slideway for a bar 41, to the upper end of whicha knife. 42 is fastened by means of a screw 43. The lower end of the slide bar 41 carries lugs 44 45,-

forming a channel for receiving operating member 46.

The block 35 has an arm 47 .pivotally mounted at 48 on a link 49, pivoted to the frame at 50. This link 49 carries a slotted lug 51, to which is adjustably pivoted the free end of link 34. The slot allows thelink 34 to beconnected at different distances from pivot50, so that the actuation of link 34 by eccentric 33 may transmit. the desiredhorizontal movement to arm 47 and block 35.

The knife-carrying slide bar 41 is operated by means of an eccentric 52 on the shaft 26.

through a link 53, pivoted to one end of an arm 54 on .rock shaft 55, there being on the other end of the rock shaft .55 an arm56, to

the end of which is pivoted the operating member 46, previously mentioned.

The work support consists of av frame 60 having'a lug 61, by whichit is adjusta-bly mounted on the pedestal A in the following manner. In the side of the pedestal there is a vertical slot 62. Plates-6364 are bolted to the pedestal and slightly overlap the edges of the slot so as to form a channel in which works a T-shaped head on the lug 61. A screw 66, passing through the lug 61 and the T-shaped head 65, may be tightened against the bottom of the groove 62 and press the arms of the head 65 out against the plates 63 64, thereby clamping the lug and supporting frame in the selected vertical position.

The work-sup orting carriage shown in Fig. 1 consists of a platform mounted on wheels 71 running on tracks 72 73. onthe frame 60. It is generally advantageous to have one end of the track sli htly lower than the other, so that the carriage will be returned by gravity to the position shown in Fig. 1. In the form shown in Figs. 8 and 9, a plurality of shaft-s 74 bearing worksupportin rollers 75 are substituted for the carriage s own in' Fig. 1. By staggering these rollers 75 as shown in thedrawings, a substantially continuous rolling support for the work is obtained. 1

In operation,'a filled bag is placed on the work support and the top of the bag is fed into the sewing machine. A reenforcing member is fed to each side of the seam, and the needle sews through the two reeuforcing members and the bag fabric to form a bagclosiug seam. After the bag has passed through the machine, the reenforcing elements may be severed, if desired,'by a cutting device diagrammatically indicated at in Fig. 1, which may bedriven from the motor by a belt '81. As the material is fed through the machine, the edges are trimmed orcut off by the knife 42. As will be seen, the cutter-knife has a compound movement.

It is caused to move transversely'of the direction of travel of the fabric b Y the movement of slide-bar 41, actuated by eccentric 52, while it also moves with the feed dogs inthe line of travel of the fabric. The cutting stroke of the knife is just to begin in the position shown in Figs. l'to 4, and takes .place while the feed dogs are being moved against the direction of travel of the fabric to get a new'hold. During this stroke, the knife moves with the feed dogs against the direction of travel of the fabric, and at the same time is drawn through the throat plate, so that the severing ed e of the knife has a drawing out againstt e fabric, the teeth on throat plate bars 24 25 aiding in holding the fabric firmly duringthe cutting operation. As shown in Fig. 2, the cutting edge of the knife is provided with tooth notches 82, and on one side has clearance grooves 83 extondin from the tooth notches. During the 'wor 'ng stroke of the feed dogs the knife advances with them, and at the same time is pushed through the throat late and through a slot in the presser foot. Teeth 84 are-shown on the rear side of the knife,

' the wor ing stroke of the and the assist in clearing the slot during return movement of the knife.

In Fig. 5 the knife is shown in the position it assumes at the end of the working stroke of the feed dogs. It will be noted that at this time the knife fastening screw 43 is in line with an opening 85 in the feed dog carrying plate 32. This opening, 85 provides access to the screw 43, so that the knife may be'taken out, to-insert a different knife or for any other purpose, without disturbing the nest of the mechanism.

The single looper is especially advantaeous when a cutter is carried by a slide bearmg in the feed dog support. as shown in this application. It is also of especial importance when it is desired to use a reenforciu' strip on onegside only of the bag, in whici case the reenforcin'g strip may be best omitted from the chain side of thestitch.

In the combination shown, the character and arrangement of the knife, the reeuforce guides, feed dogs, etc., are all especially adapted for use where paper or similar fabric is to be sewed andcut, and the'orgauized machine is especially adapted for closing and trimming the ends of filled paper bags; but it will be obvious thatvarious changes may be made in various features, and that some of the features may retain some of their advantages when used in other combinations, so that I do not wish to limit the construction or combination of the several features except as,stated in the appended claims.

What we claim is:

1 In a sewing machine, a feeddog' ca r rier having therein a slidewa' ,a cutter bar mounted in the slideway, an means to reciprocate the-bar in the slideway.

2. In a sewing machine having a feed dog, a slide bearing moving with -t a feed dog, a cutter bar slidably mounted in the bearing, and means to reciprocate the bar in the bearing. e

a 3. In a sewing machine having a feed dog, a slide bearing moving with the feed dog, a cutter bar mounted in the bearing for recipe rocation in a directionnormal to the..move

- ment of sewn fabric, and means to reciprocate the bar in the bearing.

4. In a sewing machine, a feed dog carrier having therein a'slideway, a cutter bar mounted in the slideway, an operating shaft,

ed dogs and the means connected to the shaft for operating the carrier, and other means connected to the shaft for moving the bar in the slidewafl 5. In a sewing machine, a feed d carrier having therein a slideway no direction of travel of the sewn fabric, a cutter bar mounted in the slideway and having a guidewa parallel with the direction of travel of the sewn fabric, and an operating member working in the guideway and contofthe' mg a guideway parallel with the direction of travel of the sewn fabric, and means controlling the movement of the cutter bar normal to the fabric, said means comprising a rock shaft having two arms, one of which is connected to an eccentric on the operating shaft and the other of which carries a member working in the transverse guideway in the cutter bar.

7. In a sewing machine, a throat plate having slots therein, a carrier having dogs working through certain of said slots and having a slide'way, a cutter bar mounted in the slideway and carrying a knife working through a slot in the throat plate, and means to reciprocate the bar in the slideway.

8. In a sewing machine, a throat plate having slots therein,a carrier having dogs working through certain of said slots and having aslidew'ay, a cutter bar mounted in the slideway and carrying a knife working through a slot in the throat plate, and means for moving'the bar to thrust the knife out through the throat plate during the working stroke of the'feed dogs and drawing it back during the return stroke of the dogs, the face of the plate being toothed beside the knife slot.

9. In a sewing machine, a feed dog can rier having therein a' slideway, a cutter bar mounted in the sli'deway and a knife fastened by a screw to the bar, there being an opening in a wall 9f the slideway to give access to the" head of the screw in one position of the bar. 7

10. In a sewing machinc'having an intermittent feed, a member having a slot paral lel with the direction of travel of the sewn fabric, a knife working through the slot and having a cutting edge normal to the edges of the slot, and means to move the knife with the fabric while the fabric is moving and so as to produce a drawing out against the edges of the slot while the fabric is at rest, the edges of the slot being notched to hold the fabric from movement away from the knife. v

11. In a sewing machine, a feed dog carrier having therein a slideway a cutter bar mounted in the slideway, a knife mounted on the bar, an operating shaft, means connected 'to the shaft for operating the carrier, other. means connected tothe shaft for moving the bar in the slideway, and a member upon which fabric to sewed may rest, said memher having a slot therein through which the knife I works, the edges of the slot being notched -to hold the fabric from movement away from the knife.

12. In a sewing machine having on its end a single looper adapted to cooperate with the needle, a feed dog carrier closely adjacent the loope'r and having therein a slideway, a cutter bar mounted in the slideway, and means to reciprocate the bar in the slideway.

13. In a sewing machine, a needle, a shaft luving on its end a single looper adapted to cooperate with the needle, a feed dog carricr clozely adjacent the looper and having therein a slideway, a cutter bar mounted in the slideway,' and separate means connecting the carrier and the bar to the shaft.

14. In a sewing machine, a feed dog, a slide bearing moving with the feed dog, a cutter. bar mounted, in the bearing for re ciprocation in a direction normal to the movement of the sewn fabric, and means to guide a reenforcing element to each side of the seam as it is being sewed.

15. In a machine for closing and trimming the tops of filled bags, an adjustable support upon which a filled bag may rest and be moved substantially horizontally and a sewing and trimnlinglmachine in fixed position above said support and adapted to sew and trim the top of a bag on the support, the sewing machine comprising a feed dog operable to feed the bag along the support and through the machine and having therein a slideway, and a cutter bar mounted in the slideway and'carrying a knife adapted to trim the bag as it is fed through the machine.

a needle, a shaft i 16. In a machine for closing and trimming the tops of filled bags, a edestal having therein a vertical slot, a p ate along each side of the slot and overlapping the slot, a support having a T-shaped head adapted to work in the slot, a screw operable through said head and against the slot to clamp the head in adjusted position, a work carrier on the support upon' which a filled bag may rest and be moved substantially horizontally, and a sewing and trimming machine in fixed position on the pedestal and adapted to sew and trim the top of a bag on the support, the sewing machine comprising a feed dog operable to feed the bag along the support and through the machine and having therein a slideway; and a cutter bar mountedin the slideway and carrying a knife adapted to tilim the bag as it is fed through the mac we.

17. In a machine for closing and trimming cutter-bar mounted in the bearin .ciprocation in a direction substantially norand a sewing and trimming machine in fixed position on the pedestal and adapted to sew and trim the top of a bag on the support.

18. In a sewing machine, a mem er having a slot parallel with the direction of travel of the sewn fabric, and a ,knife working through the slot and having a cutting edge substantiall normal to the line of travel of the fa ric, the cutting edge being notched and there being, in one face of the knife, a groove forming a continuation of each notch.

19. In a sewing machine, a feed dog, a slide hearing movable with the feedfdog, a

or remat to the line of movement of the sewn fabric, and a knife carried by the bar, the knife having a. notched cutting edge running substantially in the direction of its reciprocation, grooves in one face terminating in the respective notches, and clearlg teeth on the edge opposite the cutting to trim the top of a bag as it is fed throng 1 said h8Ld.- v A In testimony whereof we have hereunto subscribed our names to this specltlcation.

ADELMERM. BATES. ALBERT KR'ASA.

e. 20. Ina device for sewingand trimming, the tops of filled bags, an antifrietion sup-

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