US1359770A

US1359770A - Machine for cutting embroidery

Info

Publication number: US1359770A
Authority: US
Inventors: Tscherne Alois
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-09-28
Filing date: 1919-09-03
Publication date: 1920-11-23
Anticipated expiration: 1937-11-23
Also published as: FR513746A; DE334611C; CH86374A

Description

A. TSCHERNE.

MACHINE FOR CUTTING EMBROIDERY.

APPLICATION FILED SEPT. a, 1919.

fig. 2 7 ,j,

2 SHEETS-SHEET I.

Patented Nov. 23, 1920.

A. TSCHERNE.

MACHiNE FOR CUTTING EMBROIDERY.

APPLICATION FILED SEPT. 3, 1919.

2 9 2 SHEETS-SHEET 2 I 67 J9 f6 T i fi 2 I1".

Patnted Nov. 23, 1920.-

- 'rssrr To all whomz't may concern:

1 lates more particularly'to a machine having Bait known'that I, YALOIS Tsorrnnnn', a citizen of the Swiss Confederation, andresiding at Rorschach, Switzerland, have. in vented certain. new and useful Improvements inllilachines for Cutting'Embroidery, of which the following is a specification.

The present invention has reference to certain new and. usefulimp'rovem'ents in machines for'cutting embroidery, and it retwo. superposed revoluble disk knives for cutting the fabric along the edge of. embroidery and means n connection with the fabric feeding mechanism for so controlling the fabric feed that it is dependent upon the direction of the embroidery edge, malt ing thereby the feed elastic in keeping with the cutting resistance and speed, an arrangement which effectively protects fabric and embroidery against injury. 7 V

My invention will best be understood when described in connection with the accompanying drawings, in which Figure 1 is a front elevation of the new cutting ma chine, with parts in section or broken away; Fig. 2 1s a top View wlth the work table re moved; Fig. 8 1s a side View; Fig. 4c represents a plan of a part of themachine; Fig.

5 is a side view of Fig. a; Fig. 6 shows a detail, of which Fig. 6? shows a partial plan, and. Fig. 7 illustrates diagrammatically the operation of the machine. 7 j

From the bed plate 1 ri'sesthe standard 2 supporting sleeves 3 andt in which are re spectively journal-ed. the shafts 7 and 8 to spectively, the one of which isfixed to the shaft 11 and the otherone of which turns loosely on thisshaft, which latter is rota-.

tably journal'ed in the bearings 9 and 10 respectively. The shaft 11'is driven in any suitable manner over its fixed pulley 1 5, for

instance by a not shown electromotor or other source of power. The knives 5 and 6 are in the shape of cooperating, rotatable, disk-like edge tools, and are] so arranged that they partially overlap, so that their -ALOIS 'rsorrnnnn or 'nonsoneon, swrrznntann jMAGI-IINE FOR ouirrmsfnmnnoinnnx; Q 3' 'Application filed $epteniber'3Q1919 s rial nodsa n' 's,

planes'S an'd 6 meet at a pointa theirperip'heries-th'en constituting a cutting races, the ,wdrk "able T 'o r c th f piece to'becut is f -1' v i I I i Specification of Letters late'nt. iPfltbfin'bd devi'ce in the manner of rotary. shears; F The point of contact Zz-',the-.f utting point} From the support sleeves 3 l res'p ec tively extend brackets 3" (Figl 'l'fand f (Fig. 5) which support guideior; gate mem-' bers 16 and li? respectively, which form be tween them "immediately in front of fabric intake'or cutting point a't'he intake 7 slit or gate E 2 and 4E) which isv er} tically directed relative to the middle plane "of the knives and which is designed to, ad

mit solely the ground fabric but not the embroidery portion, so that the knives can act only on the fabric but not on the em)- broidery edge. The gate'member '16'is rigid, while themember v17 can be horizontally securably displaced insuitable' manner, so 1 that the width'of the gate E can be adjust-ed to fit any thickness of fabric.

F01?advwflciltgv the fabric there area-rranged two pairsof rollers 19, 20 (Fig 1 and 2) and 21, 22" (Figs. andft), the former roller pair serving for drawing down the wasteportion' the latter for acting on the embroidered portion. The

roller pair

19, 20 is driven by means of a worm 23"fastontheshaft 11,'which meshes with a worm-wheel 24 fast on a shaft'26 which is journaledin the bearing sleevef25- (Fig. 2).""1 This shaft: 26 also carries the driving wheel 27 which meshes with the driving 'wheel 28'fast ontheroller shaft 19". on thefshaft26 rides looselythe outrigger member 29 with cross-sleeve 30, in

latter the one end" of the shaft19' is journaled'. Thei outriggjer further is pror' vided with a downcranked arm 29 (Fig. 1) to which is pivotally 'se'curedthe lever 31 journaling the shaft 20, of the roller 20.

The. two rollers thus can rock aboutathe,

shaft 26. Thespring32 acting on the upper end of the lever B'Ltends to press the roller 20 against the roller 19, and both rollers can rotate freely. The roller 19 is "arranged between the fixed disk 33 (Fig. 2 and. the axially shiftable pressure disk 34:, whichis secured to the narrow sleeve 37 supporte'djon the fork. member 35 and is adapted 'tdbe [axially displaced"onthe sha ft 19 against the action of a spring 36. According as this spring 36 forces the sleev'e and thus against the rigid disk33, and thus the rollerwill be rotated at a correspondingly greater or lesser speed, all of which is caused by the more or less pronounced pressure of the 1 fabricagainst the gate members 16 and 17.

The fork 35 is pivoted. to a lever arm 38 -which is rockingly supported by means of pivot screws 40 in a support member 39. T hlS latter is rotatlngly ournaled by its trunn1on 41 in an upstanding bearing member 1 2, the whole presenting a kindof universal joint which permits of the rocking i5" axis of arm 38 assuming different angular positionsrelative to the horizontal. this relative angular displacement the lever 38 and the fork 35 linked thereto can be subjected to"lateral displacementso that onthe lever 38 with its roller 19 swinging up.- wardly, the fork 35 will swing outwardly, which for .es the sleeve '37 and thus the pressure disk 341 away from the roller against the action of the spring 36,-and on the lever 38 with the roller swinging down into the lowermost position fixed by a stop 30, the fork will swing inwardly, allowing the spring to press the pressure disk 34 against the roller 19. Thus on the roller swinging up there will be a corresponding retardation in its rotary speed. The roller 19 also can be arrested completely when the ascending end K of the edge of the embroidery, for instance a festoon F (Fig. 7) is drawn against the gate members 16 and 17 and is about to be cut, when, owing to the resistance occasioned by the edge, there is danger of the fabric being torn. But this danger is efl'etively neutralized by the reduction of the feed speed or the momentary arrest of the rollers, when the pull on the .fabric is correspondingly eased, the latter always being held under a tension corresponding to the obtaining resistance.

This arrangement serves to automatically control the feed ofthe work piece through

betweentheroller pairs

19, 20 and 21, 22,

by so regulating the actuation of thelatter under the influence of the resistance opposed to thec'uttingbytheembroidery edge, that the rollers alternately cause the one'or the other. fabric portion to act more or less forcibly against the gate members or the knives respectively, so that the embroidery is alwaysdrawn through the knives with the momentarily required degree of pull.

This pull, obviously, must be weak when the ascending end of the embroidery edge K is being cut, and it is caused by the

rollers

19, 20; it is to be strong when the descendino' ed 'e K" is bein severed, in

a .WhlCh instance the.

roller pair

21,22 1s pulling. To a pin43 extending from the outrigger 29 (Fig. 5) is secured one end of the spring .44 whose other end is secured to. a screw stud which is supported in an upstanding arm 47 and can 'be relatively adjusted by the set screw 455, this spring thenv regulating the swing-movement of the roller pair The

roller pair

21, 22 is driven fromthe shaft 26 by means of the bevel gears''ES, 48

(Fig. 3) ,e9, C0, 51 and 52 (Fig) 2). The wheel 52 is fast on the shaft Mas is also: a couplingv member 53, while the comple mental coupling member 55 and the roller driving wheel ride loosely on this shaft 54.. with capability of axial displacement thereon. On the roller 21, which is arranged {in abovethe shaft 54, there is provided a wheel 57 which meshes with the wheel 56 (Fig. 3). The roller 22 is located abovethe roller 21 and is frictionally taken along thereby, as is also the case with the-

rollers

19 and 20. The roller22 is journaled on trunnions in a frame or yokem'ember 58 (Fig. 3) which by means of a pin 59 is pivotally suspended from a bracket member 61, which latter is hinged to a fixed machine part and can readily be laidove'r. a. v The couplingmember 55 is connected to an annular slide '62 with which'cooperates a fork 63 fixed on the one end of a shaft 66 which is rotatably journaled in the bear ings 64 and 65. The other end of'the shaft 66 carries a lever 67 to which is secured the one end of a draw rod 68 (Fig. 3), whose 7 other end is connected to a pin 69 secured to an arm 70 extending from the outrigger member 29, the draw rod being connected to the lever 67 and to the pin 69-by the intermediary of ball and socket joints. By this connection the function of the

roller pair

21, 22 is made interdependent with that and on the roller 19 swinging downwardly the roller 21 will be uncoupled and arrested.

If now the work piece S, into which a small incision is previously made by hand, is led through between the gatejmembers 16, 17 against the knives 5, 6,,th'e waste portion S being fed in between the

rollers

19, 20 and the'embroidered portion S between the rollers 21', 22, there will be exerted a pull on the portion S by the ascendinge'mbroidery edge K of the festoon F (Fig. 7) offering relative strong resistance'to the cutting, with the result that the' roller pair 19 20 will swing upwardly. As a consequence the coupling members for the r0ller'21'are actuated which causes'the

rollers

21 and 22 1 25 to rotate and draw taut the fabric portion S, while by reasonof the braking action exerted by spring 36 ou the upswinging roller 19, the roller'pair 19,. 20 rotates more slowly, which means a lessened pull on the fabric portion S". The fabric is drawn against the knives by the

roller pair

21, 22 until the descending edge K of the embroidery is about to be cut, the resistance offered by the edge being low and only a correspondingly weak pull being exerted on the fabric portion S, so that the roller pair 19, 2O swings down, when simultaneously the

roller pair

21, 22 will be uncoupled and the fabric is once more drawn up against the knives by the now speedingup roller 7

pair

19, 20 until the ascending edge K of the succeeding festoon Fcontacts with the knives. .T he control of the roller drive, thus,

always depends upon the direction of the embroidery edge just being cut, with the conformation of the latter being immaterial since the described change can be repeated over and over. 7

What I claim is v 1. In a machine for cutting fabric along an embroidered edge, a pair of partly overlapping, oppositely revoluble disk knives arranged to cut the fabric, feed rollers for the fabric, andmeans in connection with said disk knives for controlling the operation of said feed rollers in accordance with the varying cutting resistance.

' 2. In a machine for cutting fabric along an embroidered edge, superimposed oppositely revoluble disk knives partly overlapping one another in close contact with their peripheries forming a cutting point,

relatively adjustable gate members in front of the cutting point and forming an intake slit for the ground fabric, rollers for automatically controllably feeding the work piece, means for interdependently actuating said rollers in accordance with the varying degree of resistanceoffered tosaid cutting knives by the work material. i

3. In a machine for cutting fabric-along an embroidered edge, 'two superimposed op positely revoluble disk knives coacting to I form a cutting point, pairs of rollersjfor.

feeding thework piece to the cutter, one of g V cordance with the varying degree of resistance offered to said cuttingknives bythe work material, an outrigger member on said pairs being mounted in front and the I other back of said-cutter, means for inter-o 4 dependently actuating said rollers in acwhich thefront pairs of .rollersis mounted, 1'

a shaft on which the outrigger member is journaled, and a driving-gear on said shaft whereby the outrigger member may swing A about said shaft, 7 1

4. In a machine for cutting fabric along:

an embroidered edge, two superimposed oppositely revoluble disk knives coacting to form a cutting point, pairs of rollers for feeding the work piece to the cutter, one of 7 said pairs being mounted in front and the o other back of said cutter, means for; inter-.

on one of the said front rollers, and anobliquely journaled and laterally displace-1 able leader arm operatively connected to said s rin p g ALOIS TSCHERNE.