US1746930A

US1746930A - Attachment for cloth-cutting machines

Info

Publication number: US1746930A
Application number: US187197A
Authority: US
Inventors: Frederick J Clark
Original assignee: Eastman Machine Co
Current assignee: Eastman Machine Co
Priority date: 1927-04-28
Filing date: 1927-04-28
Publication date: 1930-02-11
Anticipated expiration: 1947-02-11

Description

Feb. 11, 1930. F. .1. CLARK ATTACHMENT FOR CLOTH CUTTTNG MACHINES Filed April 28, 1927 2 Sheets-Sheet l A T m/m b s.

Feb. 11, 1930. F. J. CLARK 1,746,930

ATTACHMENT FOR CLOTH CUTTING MACHINES Filed April 28, 1927 2 Sheets-Sheet A? if .7 6 K 5/52 1 @W l fw U I L. i I

A 770mm Y5.

Patented Feb. 11, 1930 UNITED STATES PATENT OFFICE FREDERICK J. CLARK, OF BUFFALO, NEW YORK, ASSIGNOR TO EASTMAN MACHINE COMPANY, OF BUFFALO, N YORK ATTACHMENT FOR CLOTH-CUTTING MACHINES Application filed. April 28,

This invention relates to attachments for cloth cutting machines whereby a machine of this kind may be used for cutting rolls or strips of cloth or other material into shorter lengths.

The objects of this invention are to provide an attachment of this kind which forms a sub-base to which the base of the machine can be readily applied, and which requires no attaching devices on the machine itself; also to provide an attachment of this kind with a pivoted work holder or guide of improved construction; also to provide an attachment of this kind with a gage which is so positioned with reference to the work holder as to prevent the gage from interfering with the cutting of the work; also to provide the work holder of the attachment with a guard of improved construction to prevent injury to the operator from the knife of the cloth cutting machine; also to improve the construction of attachments of this kind in other respects hereinafter specified.

In the accompanying drawings,

Fig. 1 is a side elevation of the lower portion of a cloth cutting machine having an attachment embod ing my invention applied thereto.

Fig. 2 is a sectional, plan view thereof on line 22, Fig. 1.

Fig. 3 is a fragmentary, side elevation similar to Fig. 1, but showing the work guide in a different position.

Fig. 4 is a top plan view of the attachment removed from the machine, a part of the guard and of the work guide being shown in section.

Fig. 5 is a front elevation of the attachment removed from the machine.

6 is a fragmentary, sectional eleva tion thereof on line 66, Fig. 4;.

Fig. is a fragmentary, sectional elevation thereof on line 7-7, Fig. 6.

Fig. 8 1s a transverse, sectional elevation thereof on line 88, Fig. 2.

1927. Serial No. 187,197.

My attachment may be applied to any suitable or desired type of cloth cutting machine, regardless of whether the same is provided with a rotary or reciprocating knife or cutting member, and consequently it will be understood that the machine is merely shown in the drawings for the purpose of illustrating how my invention may be applied to a cloth cutting machine. The cloth cutting machine shown includes a rotary knife or cutting member A driven from a motor B which is supported from a base C by means of a standard D. This base is provided with the usual rollers 0 journalled therein, which, duringthe ordinary use of the cloth cutting machine, are adapted to roll on a table or other cutting surface, the base C passing under the layer of cloth to be cut. E represents the usual handle by means of which the machine is moved over a table or other surface when used in the ordinary manner, and F represents the usual guard adapted to be lowered into a position in front of the knife A. Obviously all of these parts may be of any other suitable or desired construction.

WVhen it is desired to use the machine for cutting short lengths from a roll or strip of material, such, for example, as is the case when it is desired to cut comparatively short rolls of bandage cotton from a roll of a length corresponding to the width of sheet of material from which the roll is made, it is much more desirable to have the cloth cutting machine held in a stationary position and to feed the work toward and from the machine, since in such cases the work to be cut is much more easily moved about and handled than the cloth cutting machine. Consequently I have provided an attachment in the form of a subbase, to which the base C of the cloth cutting machine may be clamped or otherwise secured, so that the machine will more readily remain in a fixed position than it would if it were supported on the rollers 0. On this subbase is mounted a work holder or guide in which the work is held while it is moved relatively to the cutting edge of the knife, and a gage is preferably also mounted on the sub-base to guide the operator in cutting the desired lengths from the work.

In the particular embodiment of the invention as shown in the drawings, my attach ment includes a sub-base or stand G which has a top portion adapted to receive the base C of the cloth cutting machine, this top portion being preferably provided with slightly raised edge portions 15, upon which the edge portions of the base C of the cloth cutting machine are adapted to rest, the portion 16 between the raised edge portions 15 being slightly depressed so that the rollers c of the cloth cutting machine will be out of contact with the surface 16 so that the cloth cutting machine will not tend to roll on the sub-base Gr. The sub-base G is also provided with suitable stop portions adapted to be engaged by edges of the base C of a cloth cutting machine, for example, an upwardly projecting stop portion 17 is provided near the front of the sub-base, and similar stops 18 at opposite sides of the sub-base. Near the rear of the sub-base is provided at one side an upwardly extending lug 19 and at the opposite side a similar lug 20, the inner faces of both of which engage the edges of the base C of the cloth cutting machine to hold the machine on the sub-base and to guide the base of the machine into its correct relation to the subbase G. To the lug 19, in the particular construction shown, clamping bar 22 is pivoted, preferably on a screw or stud 23 laying a threaded engagement with the lug 19, and the opposite end of the clamping bar 22 is provided with a recess or notch 24 into which the shank portion 25 of a thumb screw or bolt 26 is adapted to enter. Consequently it is merely necessary to swing the clamping bar 22 over the base C of the cloth cutting -machine as clearly shown in Fig. 8 and then tighten the thumb screw 26, whereupon the base of the cloth cutting machine will be securely fastened to the sub-base. If desired a pad or cushion 27 may be secured on-the under face of the clamping bar 22 to prevent damage to the upper surface of the sub-base of the cloth cutting machine and if necessary the clamping bar 22 may be provided wita notch, such as shown at 28, into which the rear portion of the standard D of the cloth cutting machine may enter. Consequently in order to attach the sub-base to the machine it is only necessary to place the machine on the sub-base in such a manner that the base C of the cloth cutting machine enters be tween the steps or

projections

17, 18, 19 and 20, and then to swing the clamping plate or bar 22 around over the rear portion of the base C of the machine and clamp the srne in place. This arrangement has the adenage that itis unnecessary to do any machine work on the cloth cutting machine in order to secure the attachment thereto, so that the attachment may be easily applied to cloth cutting machines by the users of the machines without requiring any skilled labor. The sub base G of the attachment may be provided with the usual feet 29 for supporting the sub-base on a table or other support. sub-base of other construction can, of course, be employed, if desired.

In accordance with my invention a work guide H for supporting and guiding the work to be cut relatively to the knife of the machine, and a gage I for determining the length of the parts to be cut from the work are mounted on the sub-base, and this may be done in any suitable or desired manner. The work guide may be of any desired shape or form, that shown in the drawings including a trough shaped work supporting portion 32 of substantially angle or V-shaped cross section in which the work X may be placed lengthwise as shown in Fig. 5. The work holder is pivoted on the sub-base to swing parall l to the knife A and for this purpose the work holder, in the construction shown, is provided with arms 33 and 34: extending 1aterally therefrom, the ends of these arms being provided with

bosses

35 and 36 which fit between lugs 37 and 38, the lug 3'? being preferably formed integral with the sub-base and extending downwardly therefrom and the lug 38 being formed on and extending clownwardly from a bracket or extension 39, which may be secured to or formed integral with the sub-base. A bearing pin 10 is secured in the lugs 37 and 38 and passes through bearing apertures in the

bosses

35 and 36 on the ends of the

arms

33 and 34, so that these arms can swing to permit the work holder to swing from the position in front of the knife A as shown in Figs. 1 and 2 to a position past the knife as shown in Fig. i so that the work held in the work holder is cut or severed by the knife A. In order to permit the necessary movement of the work holder, the projection or bracket 39 is provided with a slot or aperture 41 in which the arm 33 may move, the arm 34 being free to move about the bearing pin l0 since this arm is arranged beyond the end of the bracket 39. The front and rear edges of the slot 41 may, if desired, be employed, as shown in Fig. 7, as stops for limiting the swinging movement of the

arms

33 and 34; of the work holder and thus defining the front and rear positions of the work holder.

In order to prevent injury to the operator of the machine, a guard is provided on the work guide, which, in the particular form shown, is in the nature of a ring 14, which may be formed integral with the work holder trough 32 and which is provided with a central aperture 45 through which the work may pass. This ring is arranged approximately at the end of the work holder and in close proximity to the knife A so that this ring holds the hand of the operator out ofcontact with the knife while feeding the work lengthwise in the trough shaped holder 32. The guard ring 44 preferably projects forwardly to a considerable distance beyond the front edge of the work holder as indicated at 46 so that when the work carrier is swung rearwardly, as during the cutting of the work, the projection 46 will keep the hand of the operator out of contact with the knife A, so that the guard 44: protects the hands of the operator during the various positions of the work support.

The gage I is mounted on the sub-base on the side thereof opposite to that on which the work support is mounted and may be of any suitable or desired construction and preferably a bracket 50 is provided on the sub-base which may be either secured thereto or formed integral therewith. The gage, in the particular construction shown, is mounted on the upper face of the bracket and includes a scale or graduated bar 51 having graduations 52 on the upper face thereof, these graduations being preferably so arranged as to start from the plane in the knife A. Consequently in order to use the gage it is only necessary to move the work to the left in Figs. 2 or 5 until the end of the work registers with the desired graduations, whereupon the work is held by the hand of the operator against movement lengthwise of the work guide H, which is then swung on its pivot, as shown in Fig. 3, to cause the knife to pass through the work. If desired a stop may be provided on the gage bar or plate 51, which may be set in any desired position with reference to the graduations thereon. This stop 53 may be of any suitable or desired construction, that shown being slidable lengthwise of the gage bar and held against disengagement therefrom by means of flanges 54 ex tending below the edges of the gage bar 51 as shown in Fig. 3. The stop member also has an upwardly extending flange 55, against which the end of the work may be placed. 56 represents a set screw for locking the stop in any desired position on the gage bar 51, and stop pins 57 near the ends of the gage bar 51 prevent the removal of the stop member from the gage bar. A stop of any other kind may be provided, if desired, and the gage may also be of other construction than that shown. By providing the stop 55 in fixed elation with reference to the movable work supporting member H, the flange 55 of the stop in no way interferes with the free cuttin of a portion from the work X, as would be the case if the stop moved with the work member, in which case the work, after and during the cutting operation, would be crowded between the flange 55 of the stop and the knife and the standard D arranged at the side of the knife as is clearly shown in Fig. 2, which crowding would interfere with the proper cutting of the work.

By means of the construction described any cloth cutting machine of the type commonly used can be quickly mounted on the sub-base and clamped in place thereon so that the cloth cutting machine will not tend to roll upon its rollers c, and the machine can then be efiiciently used for cutting lengths of material supported on the work guide H. Vvhen it is desired to use the cloth cutting machine for cutting cloth in the usual way, it is merely necessary to release the thumb screw 26 and to swing the clamping bar into its inoperative position as shown in Fig. 4 whereupon the cloth cutting machine can be readily removed from the sub-base. Furthermore the gage and the work holder are securely mounted on the sub-base so that they are not apt to become lost or misplaced when not in use. It is also very desirable, although not an essential feature of this invention, to pivot the work holder on the sub-base, as shown, rather than to provide for a sliding movement of the work holder, since the free movement of a sliding connection is very apt to be interfered with by the lint and other particles of the material which is being worked upon. The pivoted work holder is always free to swing about its pivot regardless of the amount of lint or other material which may settle around the pivotal connection of the work guide with the sub-base. A sliding work holder may, however, be used with my improved sub-base, if desired.

I claim as my invention v 1. An attachment for a cloth cutting machine having a base and a cutting member, said attachment including a sub-base on which the base of the cloth cutting machine may rest, means for removably securing said base on said sub-base, and a work guide mounted on said sub-base and movable relatively to the cutting member of the cloth cutting machine.

2. An attachment for a cloth cutting machine having a cutting knife and a base, said attachment including a sub-base to which the base of a cloth cutting machine may be secured, and work holder pivotally mounted on said sub-base and adapted to swing from a position in front of said knife to .a position past th front edge of said knife, in a plane substantially parallel with the plane of said knife.

3. An attachment for a cloth cutting machine having a base provided with rollers by means of which said cloth cutting machine maybe moved over a surface, said attachment consisting of a sub-base upon which the base of said cleth cutting machine may be secured, said sub-base having a depressed portion into which said rollers may enter to prevent the rolling of said machine on said sub-base, and

means on said sub-base for guiding the work relatively to said cloth cutting machine.

l. An attachment for a cloth cutting machine having a base provided with rollers by means of which said cloth cutting machine may be moved over a surface, said attachment consisting of a sub-base upon which the base of said cloth cutting machine may be secured, said sub-base having a depressed portion into which said rollers may enter to prevent the rolling of said machine on said sub-base, means for clamping the base of the cloth cutting machine to said sub-base, and means on said sub-base for guiding the work relatively to said cloth cutting machine.

5. A sub-base for a cloth cutting machine having a base provided with rollers thereon, said sub-base being provided with raised portions adapted to engage the base of a cloth cutting machine to support said base with said rollers out of contact with said sub-base, stops on said sub-base adapted to engage the base of the cloth cutting machine for correctly positioning the base with reference to the sub-base, means on said sub-base for clamping the base of the cloth cutting machine to said sub-base, and a work support mounted on said sub-base and movable with reference to said cloth cutting machine.

6. An attachment for a cloth cutting machine having a base and a knife, said attachment including a sub-base to which the base of the cloth cutting machine may be secured, a work holder mounted on said base and adapted to receive the work to be cut and movable to feed the work to the knife, and a guard mounted on and movable with the work holder and arranged in close proximity to said knife to prevent the hands of an operator contacting with said knife during the manipulation of the work on said work holder.

.7. A sub-base for a cloth cutting machine having means for securing the base of the cloth cutting machine thereto, a work holder mounted on said sub-base, and adapted to move past said knife adjacent to one side thereof, and a guard mounted on the end of the work holder adjacent to said knife and movable with said workholder and including a portion which extends adjacent to said knife while the work holder is in work receiving position and another portion which extending adjacent to said knife while the work holder is in the work receiving position and the other side of said ring shaped guard extending adjacent to said knife when the work holder has completed its movement past the cutting edge of said knife.

9. An attachment for a cloth cutting machine having a base and a knife, said attachment including a sub-base upon which the base of the cloth cutting machine may be secured, a substantially trough shaped work holder pivotally mounted on said sub-base to swing in a direction parallel to said knife from a work receiving position in front of said knife to a position beyond the front edge of said knife, and a ring shaped guard arranged at the end of said work holder adjacent to said knife and extending substantially parallel and adjacent to said knife, one ide of said ring being positioned to prevent the hand of an operator contacting with the knife when said holder is, in its work receiving position and the other side of the ring being arranged adjacent to said knife when said work holder has moved past said knife.

10. An attachment for a cloth cutting machine having a base and a knife, said attachment including sub-base, means for removably securing said base to said sub-base, a work guide arranged at one side of said subbase and mounted thereon to move from a position in front of said knife to a positon in the rear of the front edge of said knife, and a gage mounted on the opposite side of said sub-base and with which the end of the work projecting from said work guide may cooperate.

11. An attachment for a cloth cutting machine having a base and a knife, said attachment including a sub-base, means for removably securing said base to said sub-base, a work guide arranged at one side of said subbase and mounted thereon to move from a position in front of said knife to a position in the rear of the front edge of said knife, a gage mounted on the opposite side of said sub-base and with which the end of the work projecting from said work guide may cooperate, and a stop member adjustably held on said gage and with which the end of the work to be cut may be moved into engagement.

12. An attachment for a cloth cutting machine having a base and a knife, said attachment including a sub-base, means for removably securing said base to said sub-base, a work guidemovably mounted on one side of said sub-base to move past the cutting edge of said knife, and a stop adj ustably mounted on the other side of said sub-base in fixed relation thereto and with which the work on said work guide is adapted to engage for determining the lengths to be cut from the work when the work guide is in a work receiving position and with which the work moves out of engagement when advanced toward said knife.

13. An attachment for a cloth cutting machine having a base and a knife, said attachment including a sub-base, means for removably securing said base to said sub base, a Work guide movably mounted on one side of said sub-base to move past the cutting edge of said knife, and gage means mounted on the other side of said sub-base With which the material on said Work guide may cooperate.

FREDERICK J. CLARK.