US1875703A

US1875703A - Machine for cutting the pile of weft-pile fabrics

Info

Publication number: US1875703A
Application number: US384121A
Authority: US
Inventors: Byrd Hugh Linley
Original assignee: Drey Simpson & Co Ltd
Current assignee: Drey Simpson & Co Ltd; Drey Simpson & Company Ltd
Priority date: 1928-12-24
Filing date: 1929-08-07
Publication date: 1932-09-06
Anticipated expiration: 1949-09-06
Also published as: DE566851C; GB331230A; FR687202A

Description

Sept. 6, 1932. L BY 1,875,703

MACHINE FOR CUTTING THE FILE 0F WEFT PILB FABRICS Filed Aug. '7. 1929 6 Sheets-Sheet 1 I INVNTOR P 1932- H. BYRD 1,875,703

MACHINE FORCUTTING THE FILE OF WEF'I FILE FABRICS Filed Aug. 7. 1929 6 Sheets-Sheet 2 l I l '7 I a 7, v INVENTOR JWW 7) ATTORNEY P 6, 1 H L. BYRD 1,875,703

MACHINE FOR CUTTING THE FILE OF WEFT FILE FABRICS Filed Aug. 7, 1929 6 Sheets$heet 5 H. L. BYRD Sept. 6, 1932..

MACHINE FOR CUTTING THE FILE OF.WEF'T FILE FABRICS Filed Aug. 7, 1929 6 Sheets-Sheet 4 //VVN TOR W 7 w Z F/O M ATTORNEY P 1932- H. L. BYRD 1,875,703

MACHINE FOR CUTTING THE FILE OF WEFT FILE FABRICS Filed-Aug. 7, 1929 s Sheets-Shet 5 p 1 ;H. L. BYRDQ 1,875,703

MACHINE FOR CUTTING THE FILE OF WEFT PILE FABRICS Filed Aug. 7, 1929 6 Sheets-Sheet 6 I I wvnvron 7 W B ATTORNEY I Patented Sept. 6, 1932 UNITED STATES PATENT OFFICE" HUGH LINLEY BYRI), or srooxronr, ENGLANDQASSIGNOR T DREY, SIMPSON & GOM- PANY, LIMITED, or soon; rinnmsmnnms'rooxronr, ENGLAND MACHINE FOR onrrnve' THE IPILE or wnr'r-rrnn rABnIos Application filed August 7, 1929, Serial No..384,121, and in Great Britain December 24, 1928.

This invention has reference to machines for cutting the pile of weft-pile fabrics, and it has for its object to provide an improved means of mechanically supporting and controlling the knife and guide (hereaftermerely called the knife) in the machine during the cutting operation.

'According to the invention the knife is a supported during the cutting operation in a holder adapted to be moved to and fro across the machine and so arranged that when the normal pressure of the pile floats against the knife is diminished or increased, such as by the knife flying out of the floats being cut, or by the knife piercing the cloth, orby the knife entering or being inserted into a slip of the pile instead of a race thereof, or vice versa, and also when the end of a race or slip of floats is reached or at other predetermined times, the knife is automatically moved and the machine simultaneously stopped. v

In the accompanying drawings Fig. 1 is a front elevation, Fig. 2 is a side view and Fig. 3 is a plan illustrating one embodiment of the invention.

Referring to the drawings, 4 indicates the side frames of the machine and 5 (Fig. 2) indicates the upper run of the cloth which during cutting of the weft pile loops travels in the direction indicated by the arrows 6. To the side frames 4 are fixed brackets 7 in which are mounted vertical posts 8 at the upper ends of which are supported transverse track rods 9. On the track rods 9 is mounted a carriage 10 provided with wheels 10 which bear on the rods 9 so that the carriage can be traversed to and fro transversely of the machine and the cloth 5. In the carriage 10 are pivoted pairs of bent or cranked side levers 11 and 12. Thelower ends of the side levers 11, 12 are pivotally connected to links 13, the lower and free ends of which are furnished with hook-like mem. bers 13 to receive a cross-piece 14 on the handle of the knife 14. The upper ends of the rearmost side levers 12 'carry a bowl 12 which normally rides below a transverse weight bar 15 carried by forwardly projecting arms 16fixed on a transverserock shaft shifter and brake mechanism (not shown),

of the machine, the arrangement being such that when the bowl 12 rides below the weight bar 15 the latter is held raised and the driving belt of the machine is on thefixed or driving pulley and the brake is ofl", while when the bowl 12 rides clear of the weight bar 15;t0 either side, the weight bar falls and operates the rock shaft 17 to shift the belt on to the loose pulley of themachine and simultaneously operate the brake mechanism to apply the brake and so stop the machine. The Weight bar 15 is preferably partially balanced by springs 18 to avoid undue pressure of the bar against the bowl 12 and the under face of the bar is preferably concaved to a suitable radius. The side levers 12 are acted upon by a spring 19 which tendsto draw the upper ends of the

levers

11, 12 towards the front of the mas chine and disengage the bowl 12 from below the weight bar 15 on the forward side thereof, and tomovethe lower ends of the

levers

11, 12 and the knife carrying links 13 in the contrary direction to the travel ofthe cloth'5. The tension of the spring 19 is so adjusted that the pressure of the pile floats against blade 14 of the knife14 overcomes the spring 19 and keeps the bowl 12 in engagement with, and below, the weight bar 15. If, however, the blade 14' of the knife 14 should fly out of the race or slip, the spring 19 will operate the

levers

11, 12 as just described to disengage the bowl 12 from belowthe weight bar 15, on the forward side thereof, and so allow the bar 15 to fall and rock the shaft 17 to effect the stopping of the machine, and simultaneously move the knife-carrying links 13 to carry the knife 14 in the contrary direction to the motion of the cloth 5. If, while cutting the pile in the race, the blade 14 of the knife 14 should be inserted into, or enter, a slip of the cloth instead of the race, the increased pressure on the knife due to the greater number of threads now presented to the blade, will so overcome the spring 19 as to cause the bowl 12 to ride clear of the weight bar on the rear side thereof, when the knife-carrying links 13 will be operated to carry the knife in the direction of the motion of the cloth, and allowing the weight bar 15 to fall and operate the rock shaft 17.

If on the other hand slip cutting is intended and the knife blade 14 nevertheless a be inserted into or enter a race the diminished pressure on the knife will allow the spring 19 to move the bowl 12*? to ride clear of the Weight bar 15 on the front side thereof, when the knife-carrying links 13 will be operated to carry the knife in the contrary directionto the motion of the cloth, and the rock shaft 17 will be operated to move the driving belt and apply the brake.

The knife employed is preferably of the type in which the blade is pivoted on a car riage, adapted to slide on or in a handle, and normally held in theoperative position by a catch mechanism which, when the blade pierces the cloth, is released and allows the blade to turn on its pivot and the carriage to slide on or in the handle and so withdraw the blade from the cloth. With such a knife, if the blade should pierce the cloth, the release of the pressure of the race of pile floats on the knife, due to the withdrawalof the blade from the cloth, will allow the spring or springs to actuate the mechanism of the holder to stop the machine and to carry the knife in the contrary direction to the motion of the cloth in the same way in which such operations are, as described above, effected when the blade leaves the cloth.

For moving the knife clear of the cloth, concurrently with the stopping of the machine when a complete race or slip of pile floats has been cut, or at any other time when it is desired that the operation of cutting should be suspended, two rods or rollers, 20,21 are provided between which the cloth passes, the cloth'as hitherto being joined at its ends to form an endless band. One at least of thetwo rollers or

rods

20, 21 is mounted on pivoted arms such as 22 acted upon bysprings 23, or weights which press the two rods or rollers together or the rod or roller 20 towards the other 21. The arms 22 are connected by links 24 with rearwardly projecting arms 25 on a second rock shaft 26 which also has fixed on it forwardly projecting arms 27 carrying a stop bar 28 which extends across the machine. With the stop bar 28 co-act weighted pawls 29 mounted at the upper end of a pair of release levers 3O pivoted in the wheeled carriage 10. The upper ends of the release levers 30 are connected by slotted links 31 with the upper endsof the foremost side levers 11 aforesaid, and to their lower ends are attached adjustable springs 32 anchored on the framing of the machine.

Normally the pawls 29 are kept in engagement with the stop bar 28 by the springs 32 and the slotted links 31 permit the above de scribed operations of the members of the knife holding mechanism without movement of the release levers 30. When, however, the joint between the ends of the cloth, or any other projection placed on the cloth, passes between the

rollers

20, 21 the springsor weight pressed roller 20, is owing to the greater thickness of the joint or the projection, displaced, and its pivoted supporting arms 22 through the links 24 operate the, second rock shaft 26 to move the stop bar 28 clear of the pawls 29. The springs 32 then operate the release levers 30 which, through theslotted links 31, then operate the side levers 11, 12 to move the bowl 12 from below the weight bars thus allowing the bar 15 to fall and thereby rock the shaft 17 to stop the machine, and also'carry the knife 14: forward and clear of the cloth.

What I claim as my invention and desire to secure by Letters Patent is 1 1. In a machine for cutting the pile of Weft pile fabrics, including a knife, means for mechanically supporting the knife during the cutting operation comprising a holder adapted to be moved to and fro across the machine, an operating lever for controlling the operation of the machine, a system'of' levers connected to said knife and adapted under normal operation to engage said operating lever, said system of levers being adapted upon movement of the knife in either direction to release said operating lever, and means for actuating said operating lever to stop the machine when released by said system of levers. 2. In a machine for cutting thev pile of weft-pile fabrics, a knife holder according to claim 1, including means for automatically moving the knifeclear of the cloth when the end of a race or slip of floatsis reached. 3. In a machine for-cutting the pileof weft-pile fabrics, a knife holder comprising a wheeled carriage, mounted for movement to and fro across the machine, a system of levers mounted in said carriage, means for constraining movement. of said system of levers in one direction, a. knife-supporting element carried by said system of levers normally held in an operative position and adapted to be moved therefrom when said levers are moved from normal position, a machine-controlling element with which said system of levers is adapted to be normally held in engagement by the pressure of the pile floats against the knife and against the action of said restraining means, and to be disengaged or released by said levers and effect the stopping of the machine, when the pressure of the pile floats is increased or reduced.

4:. In a machine for cutting the pile of weft-pile fabrics, an operating lever for controlling the operation of the machine, a knife, means for mechanically supporting the knife during the cutting operation comprising a holder adapted to be moved transversely of the machine, a system of levers connected to said knife and adapted under normal operation to engage said operating lever, release levers associated with said system of levers for moving said system of levers to release the operating lever, means for actuating said release levers, and means for actuating said operating lever to stop the machine when released by said system of levers.

5. In a machine for cutting the pile of weft-pile fabrics, an operating lever for controlling the operation of the machine, a knife, means for mechanically supporting the knife during the cutting operation comprising a holder adapted to be moved transversely of the machine, a system of levers connected to said knife and adapted under normal operation to engage said operating lever, said system of levers being adapted upon movement of the knife in either direction to release said operating lever, release levers associated with said system of levers for moving said system of levers to release the operating lever at the end of a race or slip of floats, means for actuating said operating lever to stop the machine when released by said system of levers, and means for moving the knife clear of the cloth.

In witness whereof I have hereunto set my hand.

HUGH LINLEY BYRD.