US1546918A

US1546918A - Machine for cutting cloth or fabric

Info

Publication number: US1546918A
Application number: US744854A
Authority: US
Inventors: Clarke Joseph
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-10-20
Filing date: 1924-10-20
Publication date: 1925-07-21
Anticipated expiration: 1942-07-21

Description

Arramrsr.

July '21, i925.

J. CLARKE MACHINE FOR CUTTING CLOTH OR FABRIC Filed Oct. 20. 1924 5 Sheets-Sheet 1 July 21, 1925. 1,546,918

7 J. CLARKE MACHINE FOR CUTTING CLOTH 0R FABRIC Filed 0G1. 20. 1924 3 Sheets-Sheet 2 MTHESSES- 706p Mvfrrr 2MWZ J. CLARKE MACHINE FOR CUTTING CLOTH 0R FABRIC I Filed Oct. 20. 1924,

Fig 5.

3 Sheets-Sheet 3 Patented July 21, 1925. 9;

JOSEPH CLARKE, 0F BELFAST, IRELAND.

MACHINE FOB CUTTING CLOTH 0R FABRIC.

Application filed October 20,1924. Serial No. 744,854.

To all whom it may concern:

Be it known that I, JosnPH CLARKE, of Belfast, Ireland, a subject of the King of Great Britain and Ireland, have invented certain new and usefulImprovements Relating to Machines for Cutting Cloth 0r Fabric, of which the following is a specification. i

This invention relates 'to the cuttingof webs of cloth in the manufacture of articles such as handkerchiefs, or other articles.

According to my invention I provide an improved machine for cutting fabrics from the web or from the piece, into, pieces of the required size, or sizes. Themachine comprises a support for the web, or piece of cloth or fabric, the cloth or fabric being taken from the web, or piece, preferably over and under suitable tensioning rollers, or equivalent, into position where the leading edge of'the web or piece can be gripped by a' suitably constructed clamp or clamps adapted to be 'reciprocated and adapted to close on the leadingedge'of the cloth to grip same before moving in the same direction as the cloth, and the amount of movement in said direction being regulated by adjustment of the means for reciprocating the clamp. At the end of said forward movement scissors, or a knife, or knives, is, or are, operated, preferably automatically and through the medium of the driving means which effects the motion of the clamp member so as to'cause the cutting device to operate when the limit of forward movement of the clamp member has been reached, thereby cutting off a portion from the web or piece of the desired length. When the cutting operation is completed means come into operation to open the clamp and release the cut portion of the web or piece therefrom so that it can fall down or otherwise be moved clear of the clamp which then returns to repeat the operation as described. The invention will now be described with reference to the accompanying drawings whereon: v

Fig. 1 is a side elevation of thecloth cutting machine constructed in accordance with the invention and showing the cloth gripped by the clamp ready for the cutting operation.

Fig. 2 is a plan view corresponding to Fig. 1.

Fig. 3 is a front elevation of the machine.

Referring to the drawings The machine comprises a frame 1 having guide bars 2 and guide rollers 3 over which the cloth 4: passes to the front of the machine where it passes between bars 5 and 6 into position where the leading edge of the web or piece is adapted to be gripped by a clamp 7 The clamp 7 is supported on a bar 8 which is secured 'to' the ends 9 of rods 9 slidable in brackets 10 on the frame 1. Provided on the rods 9 are sleeves 11 to which the ends .12 of connecting rods 12 are connected, the other ends 12 of said connecting rods 12 being connected with crank pins 12 which engage and can be adjustably secured in slots' 13 in wheels 13 supported on a shaft 14- carried by the frame 1. This construction permits of adjustment of the throw ofthe crank pin 13 relatively to the shaft 14f so that'it is possible to adjust the amount of reciprocating movement given through the connecting rods 12 to the slidingrods 9 and thereby regulating the amount of forward movement of the cloth or fabric at each reciprocation of the gripping means and before each cutting operation as hereinafter described.

The drive of the shaft 14 is effected by chain gearing 15 from a driving shaft 16. The clamp member 7 comprises a bottom jaw 7 secured to the bar 8 and upper jaws 7 adjustably mounted on a spindle 7 which is carried in bearings 7 secured on the bar 8. Each of the upper jaws 7 is turnable on the spindle 7 and is held thereon by screw members 7 This arrangement permits of the upper jaws 7" being adjusted so that when hemmed cloth or cloth of varying thicknesses is being cut by the machine it can be gripped evenly from one side to the other. One end of the spindle 7 is connected with azlever 17 having a projection 17 thereon, adapted, when the clamp 7 is being moved towards the leading edge of the cloth to grip same, to engage an inclined member 18 which normally rests on a bar 19 secured to the frame 1 so that when they projection 17* of the lever 17 is moved up the inclined member 18, the spindle 7 will be turned and will open the jaws of the clamp 7 against the action of a spring connected with the other end of the spindle 7 The normally inclined member 18 is pivoted at 18 to a member 18 and when the projection 17 of the member 17 is moved up the inclined member 18 to the top thereof it will fall down on to the bar 19 and cause the clamp 7 to be closed by the action of the spring 20. The inclined member 18 will then rest on the projection 17 of the lever 17 during the return movement of the clamp 7. The cutting of the cloth is eflected by means of cutting members 21 and having

cutting edges

21 and 22 The cutting member 21 is arranged parallel with the clamp 7 and is secured to the frame 1 at each side thereof. The cutting member 22 is arranged at an angle to the cutting member 21 and it is connected at each end thereof with rods 23 slidable in bearings 23 and connected, through the me dium of links 24, with levers 25 pivotally supported on a spindle 26 carried by the frame 1. The levers 25 are connected with one another at their back ends by a rod 25 and they are provided with counter balancing weights 25 The movements of the levers 25 are controlled by cams 27 of the shaft 14, the inner paths 27 of the cams 27 being engaged by rollers 28 and the outer profile surfaces of the cams being engaged by rollers 29, the

rollers

28 and 29 being connected with discs 30 on pins 31 connected with the levers 25. The discs 30 are free to turn on the pins 31 so that when the rollers 28 travel round the narrow portion of the cam this freedom will permit the rollers 28 to lag and thus avoid a sharp movement thereof which might cause knocking or jarring of the mechanism.

The bars 5 and 6 are supported by members 36 slidable in brackets 37 secured to the cutting member 21. The members 36 are provided with projections 38 adapted to be engaged by cams 3.) on a spindle driven from the shaft 14 by a. chain 40 and carried by the brackets 37. An angle bar 6 arranged parallel and in alignment with the bar 6 is connected with pins (3 which pass through the bar '6. The front edge 6 of the angle bar 6 normally rests against the top of the cutting member 21 and the arrangement is such that the cams 39 on the spindle 40 will, through the projections 38 on the bars 86 raise the latter against the action of springs 41 and the angle bar 6 and so raise the bars 5 and 6 and angle bar 6 will be moved over and rest on the top of the cutting member 21 by the action of springs (3 and will support the cloth or fabric so that it can be gripped by the clamp when the latter returns and at the same time as the clamp 7 closes on the cloth the anglebar 6 will be pushed clear of the cutting member 21 by projecting members 42 sc cured to the bar 8. The angle bar 6 and bars 5 and 6 will then, by the action of the springs 41, return to their normal positions ready for the next operation.

The arrangement is such that when the clamp 7 has gripped the leading edge of the cloth or fabric as hereinbefore described it will be moved forward to its predetermined distance controlled by the cranlc pins 12 and sliding rods 9 and when the limit of the forward movement of the clamp is reached the cams 27 will move the levers downwardly taking with them the rods 23 and cutting member 22 thereby cutting the fabric, after which operation the clamp 7 will commence its backward movement and as soon as the projection 17 of the member 17 bears on the inclined member 18 the clamp 7 will be opened and the cut ma terial released therefrom. At the same time the angle bar 6 will be pushed over the cutting member 21 as hereinbefore described to support the leading edge of the cloth whilst it is being gripped by the clamp member 7 when the forward movement of the clamp will again commence to repeat the operations described.

Having now fully described my invention what I claim and desire to secure by Letters Patent is 1. A machine for cutting material com prising a support for the material adapted to be given an upward and forward movement, means for tensioning the material, a clamp consisting of a lower jaw and a number of upper jaws independently adjustable along and around a spindle, the said clamp being held closed by means of a spring and being opened by the engagement with an inclined member of an arm connected to the said spindle carrying the upper jaws, rods, connected to the said clamp, slidably mounted on the machine frame and adapted to be reciprocated by means of connecting rods operated by crank wheels, means for regulating the amountof reeiproeating movement of the gripping means, a cutting device, means for operating the said device so that at the end of the forward movement of the gripping means a portion of desired length is cut off from the ma terial.

2. A machine for cutting material comprising a support for the material adapted to be given an upward and forward movement, means for tensioning the material, a clamp consisting of a lower jaw and a num ber of upper jaws independently adjustable along and around a spindle, the said clamp being held closed by means of a spring and being opened by the engagement with an inclined member of an arm connected to the said spindle carrying the upper jaws, rods, connected to the said clamp, slidably mounted on the machine frame and adapted to be reciprocated by means of connecting rods operated by crank Wheels, radial slots in the said wheels, in which slots crank pins for engaging the said connecting rods are ad ustably fitted, a cutting device, means for operating the said device so that at the end of the forward movement of the gripping means a portion of desired length is out 01? from the material.

8. A machine for cutting material, comprising upper and lower bars for supporting the material therebetween, an angle bar, on the lower of the said bars, normally resting against the edge of the lower cutting member of the machine and adapted to be moved upward and forward along with the said upper and lower bars to cover the said cutting edge, means for tensioning the ma terial, clamp comprising upper and lower jaws held together by a spring and adapted to be opened by the engagement with an inclined member of an arm connected to the upper jaws, rods, connected to the said clamp, and adapted to be reciprocated by means of connecting rods operated by crank wheels, radial slots in the said wheels, in which slots crank pins for engaging the said connecting rods are ajustably fitted, a lower cutting member secured to the machine trame, an upper cutting member arranged at an angle to the said lower memher and adapted for vertical movement towards and away from the said lower member by cam means for the purpose of cutting the material.

41. A machine for cutting material comarising an upper and lower bar arranged to form therebetween a support for the material, means for tensioning the material, a clamp comprising a lower jaw and a number of upper, jaws independently adjustable along and around the spindle, the said clamp being held closed by means of a spring and being opened by the engagement with an inclined member of an arm connected to the said spindle carrying the upper jaws, rods connected. to the said clamp,

and adapted to be reciprocated by means of connecting rods operated by crank wheels, radial slots in the said wheels, in which slots crank pins for engaging the said connecting rods are adjustably fitted, a lower cutting member secured to the machine frame, an upper cutting member arranged at an angle to the said lower member and adapted for vertical movement towards and away from the said lower member by cam means for the purpose of cutting the material.

5. A machine for cutting material comprising upper and lower bars for supporting the material therebetween, an angle bar, on the lower of the said bars, normally resting against the edge of the lower cutting member of the machine and adapted to be moved u award and forward along with the said upper and lower bars to cover the said cutting edge, means for tensioning the material, a clamp comprising a lower jaw and a number of upper jaws independently adjustab-le along and around a spindle, the said clamp being held closed by means of a spring and being opened by the engagement with an inclined member of an arm con nected to the said spindle carrying the upper aws, rods connected to the said clamp, and adapted to be reciprocated by means of connecting rods operated by crank wheels, radial slots in the said wheels, in which slots crank pins for engaging the said connecting rods are adjustably titted, a lower cutting member secured to the machine :t'rame, an upper cutting member arranged at an angle to the said lower member and adapted for vertical movement towards and away from the said lower member by cam means for the purpose of cutting the material.

In testimony whereof I aiiiX my signature in presence of two witnesses.

JOSEPH CLARKE.

l/Vitnesses:

ANDREW I'IAMILTON, HARVEY WAnrna ,ALLSOP.