US1500632A

US1500632A - Method and apparatus for cutting bias strips

Info

Publication number: US1500632A
Application number: US401277A
Authority: US
Inventors: Melvon A Marquette
Original assignee: Fisk Rubber Co
Current assignee: Fisk Rubber Co
Priority date: 1920-08-04
Filing date: 1920-08-04
Publication date: 1924-07-08
Anticipated expiration: 1941-07-08

Description

juiy s, 1924.

A. MARQUETTE METHOD AND APPARATUS FOR CUTTING BIAS STRIPE Filed Aug. 1920 2 Shams-Sheet 1 INVENTOR Melvon F\.Mar

H BY I que 6 fi' ATTO EY 2 3 N, flu Q 5 n E T T E U Q R m N A M 2 9 2 RM jiffy METHOD AND APPARATUS FOR CUTTING BIAS STRIPS w k m Q av WM.

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S O VY 2 ill W ATTO Patented Jul 8. 1924.

UNITED STATES. P TENT. ()FFICE.

xnnvon a. MARQUETTE, or enrcornn FALLS, massaormsn'r'rs, ASSIGNOR To run msx RUBBER COMPANY, or CHICOPEE FALLS, massacnuss'r'rs, A conrona'rron Q1 MASSACHUSETTS.

'mn'rnop AND nrraaa'rus FOR cu'r'rmoi BIAS s'rzarrs.

Application filed August 4, 1820. Serial No. 401,277.

To all whom it may concern:

Be it known that I, MnLvoN A. MAR- QUETTE, a citizen of the United States of America, residing at Chicopee Falls, in the a county of Hampden and State ofMassachusetts, have invented certain new and useful Improvements in a Method and Apparatus for Cutting Bias Strips, of which the following is a specification.

My present invention relates to a method and an apparatus for cutting fabric on the .bias, and particularly to the cutting of a succession of bias strips from a relatively long sheet of fabric.

a It has for its object the cutting of fabric on the bias while the fabric is moving, thereby greatl increasin the output. It has for a furt er object t e substantial elimination of moving, and especially reciprocating,

parts. It has for a further object the provision of means whereb. the cutting means can be renewed or rep acedwithout stop- .ping the machine. It has various other obects relating to improvements in'the method 2 and toconstructional and operating advantages whi-h will appear from the ensuing description and the appended claims.

M invention will now be described with particular reference to the accompanying drawings some of which are diagrammatic in their nature, and in which- Fig. 1 is a diagrammatic side elevation of a vice embodying my invention;

Fi 2 is an enlarged detail showing the coaction of the cutting members with the cutting roll;

Fig. 3 is a detail showing the construction of the cutter tracks at the curves;

Fig. 4 is a plan view corresponding to 4.0 Fig. 2;

11, under a guide roll 12, and over abutting.

cylinder 13. The fabric may be held. in contact with this cylinder by

rollers

14 and 15. In passing over the cutting cylinder the fabric is severed into bias strips. These strips are cut by the mechanism which will gages fingers 33 now be described. Arranged adjacent cylinde r 13 are tracks 16 and 17, upon which run carriers 18 which engage the tracks by bearings 19 and 20. The tracks may be supported from any suitable frame by posts 21. On the curved portionv of the tracks they are preferably cut away as at 22 (Fig. 3), to prevent binding of. the carriers. Each carrier has a bracket 23 which carries a cut ter 24. This cutter is preferably a thin blade having cutting edges at 25 and 26, so that by reversin the blade a new cutting edge is resente to the work. The blade may be astened to the bracket by dowels 27 and a thumb screw 28, Bracket 23 also carries a guide finger-29, adapted to run in one of a series of spiral grooves 30 in the surface of cylinder 13 and preferably bulged near the top'to assure a good bearing surface in the groove while the portion of the flange. adjacent to' the fabric is as thin as the stresses allow in order. to present minimum interference with the edges of cut fabric. As will be apparent from Fig. 4, the

rotation of cylinder 13 will cause carriers 18, due to their engagement with grooves30, to progress across the roll, their motion-belel with the axis of the roll. In order that the blades will lie in the grooves during the ly appears from the drawings. In order to return the carriers to the initial side of the cylinder a belt or cord 31 is disposed about ulleys 32. This belt enfi'ictionally ressing against the belt, and serving to hol the carriers to the belt for motion therewith when they are not restrained by the grooves 30; The pulleys are driven, as by gearing34: connected to the cutting cylinder, at such a speed that the carriers will travel along the return path at a higher speed than the rate at which they are fed by the grooves. This results in a piling up, of the carriers at the entrance side of the cylinder; so that one is always ready to pass into a groove when the leading end thereof is in position. It will be noticed, also, that the feed of the carriers durmg the cutting is controlled positively by i the grooves in the cylinder, the belt slipping through the friction clips during this operaing restricted by the guides to a line paralsurfaces coining in contact.

the belt and clips.

The sheet thus cut into bias bands is led by a guide 36 and a' roll 5% which directs it to the delivery device, which maybe of any desired type. If the fabric has been coated with rubber before being cut, however, it is necessary to provide a liner, so-called, of uncoated fabric to prevent adjacent rubber In the drawings this liner is indicated at 37 and passes over guide-

rolls

38 and 39, when it again meets the rubberized fabric, now out into bias strips, and serves as a support therefor. A gravity tension roll 5?) serves to keep the liner taut. The liner and bias cut strips are conveniently wound on a roll or' spool 40- whichmay be rotated by a belt 41 mounte on pulleys 42 driven by any suitable mechanism. i

It is desirable to provide means for allowing the carriers to be removed from the track, and carriers having sharpened blades substituted, without stopping the machine. For this purpose switches are preferably provided, as will now be described. In Fig. 5 theseswitches are shown in position to remove carriers from the track. The removing switch consists of a double track 43 correspondin at 44 and pre erably having a removable stop td- Tracksl6 and 17 have pivoted sections'46 which are pushed out of line b the movement of the switch in position. l he pivoted sections 46 may conveniently be constructed as shown in Fig. 7, being pivoted-at 4.7 to the main track and having a-suitable leaf spring 4:81 serving to hol the=pivotedsection in alignment with the lmain 'ttacljrwhenlhe switch is-nofl'being operated. The end of the pivoted section is preferabl shaped as at 49 to permit it to seat firm y in alignment with the main track. The-- switch for inserting" carriers with sharpened blades may be constructed with a-fixedftrackbO, and a pivoted section 51, of the main track, which may be constructed as described for section 16.

The construction above described lends itself readily toadjnsting the width of the biasstrips to any one of a predetermined number of widths. This maybe done by providing the cylinder 13 with extra grooves 52, those not in use being closed as by plates 4 53 to prevent entrance of' carriers. [fit is not desired to have this, adjustable feature the carriers may be controlled by a positively, driven chain. e

l'claim:v v 1. Themethod of cutting bias strips from relatively "longsheet of fabric, consisting .in supporting.t-he-falu-Ic.(m a moving surface, making repeated bias cuts from edge to edge offthe fabric by passing a cutting to tracks 16 and 17, pivoted member across the-moving surface at right angles removing from the surface the bias strips th'us out.

to its direction of movement, and.-

2. T1e method of cutting bias strips from a re/ia ively long sheet of fabric consisting in moving the sheet continuously in the direction of itsolength, andmoving a succes-. sion of cutting members across the strip in a path substantially normal to the direc- 7 5 tion of movement of the sheet. 7 3. The-method of cutting bias stripsfrom a relatively lon sheet of fabric consisting in moving the sheet in the direction of its length, and moving a succession of' cutting '80 members across the strip at such an angle that the resultant of the motions of the strip sired angularity in the bias strip.

andcutting members will produce the del 4. The method of cutting a relatively long 8 web of fabric on the bias consisting in moving said web in contact with the surface of a rotating cylinder, andpassing a cut; ting member axially of the cylinder and in contact with the web to sever the latter on the bias from edge to edgwhile the cylinder and web, are moving.

of the fabric to the other, andmeans for rotating the cylinder and reciprocating the m carrier in synchronism.

6. An apparatus for cutting fabric on the bias comprising a rotatable .cylinder, means for guid ng a sheet of fabricover the cylinder, a series of carriers fitted with cutting blades movable axially of-the cylinder, an means for moving saidicarriers successively and in synchronism with the cylinder.

7. An apparatus for cuttin fabric on the bias comprising a cylinder having helical grooves therein, means for guiding a sheet of fabric over the cylinder, a series of carriers having cutting blades, and having means for engagement with said grooves,

guides for directing said carriers ad acent the cylinder and parallel with the axis there-1 of and for returning the carriers to the initial 'end of the cylinder, and meansfor moving the carriers back to the initial end of the cylinder after they leave said grooves. 8. An apparatus [or cut-tin fabric on the bias comprising a cylinder aving helical grooves therein. means for guiding a sheet of fabric over the cylinder, a'series of car riers having cutting blades, and having means for engagement with said grooves, guides for directing said carriers adjacent the cylinder and parallel with the axis thereof and for returning thel carriers to the initial end ref the cylinder, and means memes for moving the carriers back an the initi-Lil end of the cylinder after they leave said grooves and switches in said guides Where by certain of said carriers may be inserted or removed Without stopping the operation of the machine.

9. An apparatus for cutting" fabric o'n'the bias comprising a cylinder haying helical grooves therein, (means for guiding a sheet of fabric over the cylinder, a series of carriers having cutiing blades, and having means for engagement with said grooves, guides for directing said carriers adjacent with the axis -the11eof end for returning the carriers to the iniw-j tie end of the cylinder, and means for moving the carriers back to the initial end of he cylinder after they leave said grooves, said lest-named means being constructed and arranged to move at a higher speed than the feed of said grooves, and to have slipping engagement with said carriers wheie by said carriers are pressed against the ini tial end of the cylinder and held in readiness to be received by the rooves.

MELVON A. RQUETTE.