US2962791A - Selvage trimming machine - Google Patents

Description

Dec. 6, 1960 L. F. REMINGTON 2,962,791

SELVAGE TRIMMING mourns Filed Dec. :5. 195a INVENTOR LELAND F REMINGTON ATTOR Y United States Patent 9 SELVAGE TRINEMING MACHINE Leland F. Remington, Worcester, Mass, assignor to Curtis & Marble Machine Co., Worcester, Mass., a corporation of Massachusetts Filed Dec. 3, 1958, Ser. No. 777,914

1 Claim. (Cl. 2610.4)

This invention relates to a machine particularly designed for trimming cloth in which the weft has been inserted in a series of loops, and in which the open ends of each loop project beyond the cloth selvage at one side edge of the cloth.

It is the general object of the present invention to provide imporved means for reliably cutting such selvage ends as the cloth is drawn through the trimming machine.

More specifically, an elongated cylindrical cutter is provided, positioned alongside one edge of the cloth to be trimmed. I also provide an associated and elongated fixed blade or cutter, underlying and supporting the edge of the cloth adjacent the rotating cutter. Means is also provided to rapidly rotate the cylindrical cutter, and to draw the cloth through the machine adjacent the fixed blade and rotating cutter.

Provision is also made for straightening the selvage ends and for directing these selvage ends outward and away from the edge of the cloth.

The invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly set forth in the appended claim.

A preferred form of the invention is shown in the accompanying drawings, in which:

Fig. 1 is an end elevation of the improved selvage trimming machine; and

Fig. 2 is a fragmentary plan view showing the operation of the machine, and with certain of the parts in section or broken away.

Referring to Fig. 1, I have shown a stand supporting bearing blocks 12 for a motor M, and also supporting bearings for a shaft 13 on which an elongated cylindrical cutter 15 is mounted. This cutter has axially elongated cutting blades, which may be spirally arranged as shown.

The shaft 13 is provided with a pulley (Fig. 2) which is connected by a chain or belt 21 to a pulley 22 mounted on the drive shaft 23 of a driving motor M, which in turn is mounted on the stand 10, above and outside of the locus of the cutter 15, as clearly shown in Fig. 1.

The stand 10 is mounted on spaced bearing blocks 30 and 31 (Fig. 1) which are threaded to receive a lead screw 32 which is axially fixed and which may be turned by a hand wheel 33 to adjust the trimming mechanism in or out in relation to the path of travel of the edge of the cloth or fabric C to be trimmed.

A stationary knife 40 is mounted on the stand 10, with 2,962,791 Patented Dec. 6, 1960 ICC its upper edge in cooperating relation with the rotating blade 15. An edge guard 50 is mounted in spaced relation above the knife 40 and permits passage of the fabric C lengthwise of the knife 40 and axially of the rotating cutter 15.

Upper and lower air pipes 52 and 53 may be provided to direct jets of air against the upper and lower faces of the fabric in outwardly inclined directions, so that all loose weft ends will be blown outward and clear of the selvage as the cloth approaches the rotating cutter 15 and the fixed coacting knife 40.

All loose ends are thus caused to overlie the fixed knife 40 and to extend into the path of the blades 16 of the rotating cutter 15. The rotating blades 16 and the fixed knife 40 thus cooperate to very effectively trim all loose weft ends from the edge of the cloth or fabric C as the cloth is drawn lengthwise through the machine.

Attention is called to the extended travel of the cloth C relative to the fixed knife and rotating cutter during the operation of the machine. As the cloth travels some six inches in the direction of the arrow a (Fig. 2) while fully exposed to the action of the cutter 15 and knife 40, very effective and complete trimming of the cloth is effected, and the cloth leaves the trimming machine in very satisfactory condition, as indicated at C in Fig. 2.

A suitable exhaust connection 60 is provided on the stand 10 to remove the weft ends severed by the trimming mechanism.

It is found that the provision of a rotating cutter of substantial length, coacting with a fixed blade of similar length, and with both extending lengthwise along the path of travel of the cloth provides an extremely reliable trimming operation, which substantially avoids leaving any untrimmed threads in the selvage of the fabric.

Having thus described the invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claim, but what I claim is:

In a selvage-trimming machine, means to guide a piece of cloth in a defined and straight path through the machine, an elongated, spiral and substantially cylindrical rotating selvage-trimming cutter mounted closely adjacent and overlying the untrimmed selvage edge portion of the cloth, the operative length of said rotating cutter being greater than the diameter of said rotating cutter, means to continuously rotate said cutter, and an elongated and fixed knife underlying the selvage edge of the cloth and extending lengthwise of the axis of the cutter and of at least equal axial length, and said rotating cutter coacting with said fixed knife to shear the projecting selvage maids as they pass said rotating cutter and said fixed References Cited in the file of this patent UNITED STATES PATENTS 1,880,487 Richardson Oct. 4, 1932 1,973,104 Richardson Sept. 11, 1934 1,981,l91 Piper Nov. 20, 1934 FOREIGN PATENTS 748,100 France Apr. 10, 1933

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