US2594919A

US2594919A - Selvage loop cutting mechanism

Info

Publication number: US2594919A
Application number: US173210A
Authority: US
Inventors: Wilfred N Hadley
Original assignee: Parks and Woolson Machine Co
Current assignee: Parks and Woolson Machine Co
Priority date: 1950-07-11
Filing date: 1950-07-11
Publication date: 1952-04-29
Anticipated expiration: 1969-04-29

Description

A ril 29, 1952 w. N. HADLEY 2,594,919

SELVAGE LOOP CUTTING MECHANISM Filed July 11, 1950 I 2 SHEETSSHEET 1 12301223303 Wfled ZVIH'aoliay, MY

April 29, 5 w. N. HADLEY 2,594,919

SELVAGE LOOP CUTTING MECHANISM Filed July 11, 1950 2 SHEETS-SHEET 2 o o o o o o o o o o 0 V OOOOOOOOOOOIOOOQ o o o o o l o R f I O O I oooooooooooooooo 0 Q o 1 A o o \0 o o o, 0 0 o o o 40 V 0 v H n o H o I O A-wz fewezzofl: M'Zffled MHadiey,

ii'fo megs Patented Apr. 29,. 1952 SELVAGE LOOP CUTTING MECHANISM lVilfred N. Hadley, Springfield, Vt., assignor to Parks & Woolson Machine 00., Springfield, Vt., a corporation of Vermont Application July 11, 1950, Serial No. 173,210

Claims.

This invention relates to novel and improved mechanism .for cutting the selvage loops on woven fabrics as the fabric is fed longitudinally in open width and taut condition. The primary object of the invention resides in an improved and simplified loop cutting mechanism and improved mounting therefor whereby the mechanism can be conveniently and accurately adjusted relative to the selvage to be treated.

The loop cutting mechanism embodies a plurality of loop cuttingknives carried in spaced relation on and along an endless supporting member and my improved mounting includes a bracket for supporting the mechanism outwardly of the selvage for angular adjustment toward and away from the fabric and also at an acute angle to the selvage, thus facilitating the loop cutting operation and reducing any danger of damaging the fabric, all as hereinafter more specifically described.

The loop cutting mechanism preferably employs two like units disposed at opposite faces of the fabric with each unit embodying an endless chain having loop cutting knives integral with spaced links thereof. The chains are mounted to cross the selvage at an acute angle and are also inclined away from the fabric inwardly of the selvage. These features together with an inclined disposition of the knives, all as hereinafter described, being adapted more efficiently to perform the loop cutting operation with a minimum of danger to the fabric.

These and other features of the invention will be more readily understood and appreciated from the following detailed description of a preferred embodiment thereof selected for purposes of illustration and shown in the accompanying drawings in which:

Fig. 1 is a fragmentary elevation of my improved loop cutting mechanism mounted in operative position on a cloth guiding machine,

Fig. 2 is an enlarged fragmentary sectional view taken on line 2--2 of Fig. 1,

Fig. 3 is a fragmentary side elevation of the loop cutting knives shown in Fig. 2,

Fig. 4 is an enlarged elevation of the loop cutting units taken on line 5-4 of Fig. l, and

Fig. 5 is a fragmentary view of the fabric to be treated.

As illustrated in Fig. l, a strip of fabric i0 is supported for longitudinal movement downwardly in open width and taut condition. A pair of swing guiders l2 mounted on a rail H3 is provided for automatically maintaining the fabric in a predetermined path. The swing guiders are carried by heads l6 movable across the fabric equally and in opposite directions by ascrew l8, and are also described in my copending application Serial No. 172,315, filed July 6, 1950.

My improved selvage loop cutting mechanism is mounted on a bracket 23 illustrated in Fig. 1 as carried by one of' the heads l6 and extending outwardly to a position outside of one margin of the fabric to. The loop cutting mechanism, as illustrated in Figs. 2-4, comprises two like units mounted to operate respectively at the two faces of the fabric. The units are mounted on the free end of the bracket 20 and each includes an arm 22 mounted on the bracket for adjustment about an axis 24 disposed substantially parallel with the plane of the fabric. Each arm 22 includes an outer portion 26 adjustable longitudinally and secured in adjusted position by a clamping bolt at 28.

Each loop cutting unit also includes an endless link chain 30 supported on

sprockets

32 and 34. The sprocket 32 is carried by the adjustable arm portion 26 and sprocket 3 1 is carried and driven by a motor 36 supported in a U-shaped frame 38 mounted on the arm 22, the motor being in axial alignment with the pivot axis 24. Loop cutting knives 40 are carried by the chains and, in accordance with the preferred embodiment of my invention, these knives are integral parts of spaced links 42 along the chains.

The fabric travels downwardly in the direction of the arrow and the loop cutting units are mounted to dispose the chains 30 at an acute angle across the margin of the fabric in the arrangement illustrated in Fig. 1. The loop cutting knives 48 are also inclined in one direction laterally of the plane in which the chain travels, the inclination being in the direction of fabric travel as illustrated in Fig. 2.

As illustrated more particularly in Fig. 4, each sprocket 32 is carried on one arm 44 of a bell crank pivoted at 45 to the arm portion 26. The other arm 4'6 of each bell. crank is engaged by a tension spring 48 which pulls the bell crank in a direction tensioning the chain.

The bracket 26 together with the mounting at 25 disposes the loop cutting units at the acute angle shown in Fig. 1 wherein the inner reaches of the chains 3 0 travel in the general direction of the cloth rather than in an opposing direction, thereby reducing any possibility of damaging the cloth. The pivotal mounting at 24 permits adjustment of the units to the position illustrated in Fig. 4 wherein the inner reaches of the chains 30 closely approach the fabric at the selvage and incline outwardly away from the face of the fabric inwardly of the selvage. As thus positioned, the outwardly moving cutters will bear slightly against the travelling fabric at the selvage and thus more effectively catch the loops. Furthermore, the inclination of the cutters 40 in the direction of fabric travel (Fig. 2) further reduces the liability of the points to penetrate and damage the cloth.

Having thus disclosed my invention what I claim as new and desire to secure by Letters Patcut is:

1. A selvage loop cutting mechanism for use on a machine embodyin means for supporting and moving a strip of cloth longitudinally in open width and taut condition along a plane predetermined path, comprising a bracket adapted to be carried by the machine in position disposing a free end portion thereof outwardly of one margin of said path, an arm on the free end portion of the bracket outwardly of said margin, a motor carried by the arm, a sprocket on the motor shaft outwardly of said margin, a second sprocket carried by the arm inwardly of said margin, an endless chain supported on the sprockets and having one reach disposed adjacent to and extending across said margin, a plurality of spaced loop cutting knives carried by the chain, and means securing the arm to the bracket for adjustment in directions moving the said one reach toward and from said margin.

2. The selvage loop cutting mechanism defined in claim 1 in which said loop cutting knives are inclined in one direction laterally of the chain.

3. The selvage loop cutting mechanism defined in claim 1 in which the chain includes links and the loop cutting knives are integral with spaced links along the chain.

4. A selvage loop cutting mechanism for use on a machine embodying means for supporting and moving a strip of cloth longitudinally in open width and taut condition along a plane predetermined path, comprising a support disposed outwardly of one margin of said path, two rotary elements carried by the support respectively at opposite sides of said margin, an endless band looped about and carried by said elements, a plurality of spaced loop cutting knives carried by and extending outwardly beyond the outer face of the band, and power means for driving the elements andband, one reach of the band being in a plane slightly inclined to the plane of said path and having the knives thereof disposed in said path at said margin and spaced progressively further away therefrom inwardly of the margin.

5. The selvage loop cutting mechanism defined in claim 1 in which the mechanism carried by the bracket is disposed at one side of the plane of said path, and like mechanism carried by the bracket at the other side of said plane.

WILFRED N. HADLEY.

REFERENCES CITED The following references are of record in the file of this patent: