US1382516A - Method of weaving pile fabrics - Google Patents

Description

' e; KOCH. METHOD OF WEAV'ING PIL'E FABRICS.

. APP L|CAT|0N FILED JULY 26,1920.

1,382,516. PatentedJu11e'21 1921.

w/mss; l/VI/E/VTOR WW George ATTORNEY.

fi STATES-PATENT OFFICE.

GEORG KOCH, DARMSTADT, GERMANY, ASSIGNOB TO DR. ERNEST GADGEN'E AND OLAV BERG, BOTH OF IPATERSON,-NEW JERSEY.

7 METHOD OF WEAVING FILE FABRICS.

Applicationfiled July as,

To all whom it may concern:

Be it known that I, Gnone K001i, a citizen of Germany, residing at F Heinrlch-Fuhrstrasse, Darmstadt, Hessen, Germany, have invented certain new and. useful Improve:

ments in'Methods of lVeavi'ng Pile Fabrics,

' of which .the following is a specification.

nent threads may be few in number and need tight not be especially thick.- 1

The drawing shows in the two figures longitudinal sectional views of two different forms of pile fabric capable of being formed by the improved method.

In Figure 1 a designates the aforesaid tight warp, b a loose warp and c a pile warp. It is not indispensable, thou h it'is preferable, that in the finished pro not the warp a should be straight, as shown: the terms and loose are herein used simply to express that the warp a is held under greater tension during the weaving process than the warp b so that the crossing and binding of these two. by filling and with reference to each other will exhaust more yardage of the warp 1) than the warp w and warp b will be left sinuous, while warp a is left straight or at least less sinuous; the straighter the warp a is in the finished'prodnot the less susceptible will the fabric be to stretch and so open up under stretchingstrains. Warp c is also looser than the warp a, thatis, under'less tension, and is preferably subject to means (not shown) to positively let off or feed warp .each time a row of pile loops is to be formed, according to the hei ht of pile desired. (1 designates shots 0 weft or filling. At intervals, as

1, 1, 1, the warp b is made to cross and recross the warp a, a shot of filling d being I passed between. the two warps between their points of crossing. These shots of filling are at the back of thefabric. Between each .two intervals 1, 1 and at the other side of the fabric four (it may be some higher even number) crossings of the warp: b and pile Specification of Letters Patent.

1920. 1 Serial No. 399,207.

warp 0 take place and between each two such crossings a shot offilling d is passed.

In Fig.1 there are an even number of crossings of the loose warps with respect to each other and the pile loops rise between the middle'two crossings of the warps b and a; v y

In Fig. 2 there are an odd number of Patented June 21, 1921..

crossings of the looser warps with respect to each other, and the pile loops rise between the first and second there are bindings, however, of thein with respect to the tight warp by weft or filling at the other side of the tight warp, thus:

e is the tight warp, and f and g loose warps (j. e., warps under less tension than the warp e). The warps f and g in this case both go to form pile loops, e., alternately, and may have means to positively let off or feed warp alternately to form the rows of pile loops. h designates shots of filling. At in-.

tervals, as 2, 2, 2, the warps f g are first one and then the other made to cross and recross the warp e, a shot of filling it being each time passed between the two warps (e, f or e, g) between their points of-crossing. Between these intervals and at the other side of the fabric three crossings of the warps f and 9 take place, andbetween each two such crossings a shot of filling h is passed. T

In the formin of the pile loops a false warp a: (see my atent No. 1,305,373, to wit, the filling supports'n referred to therein) is employed. This warp or equivalent extends from the back of the loom forward and has free ends indicated 'at' y, bein extended past the fell of the fabric'mor or less forward, the fabric clearing the sameas the weaving progresses and the take-up means of the loom advances it. In Fig.1, between each 'two intermediate points of crossing of the warps b and c with reference to each other the warps c and w are made to cross and recross each other, the filling d being introduced over the warp m. In Fig. 2, between two of the crossing of the warps ,f and g Wltli referpoints of ence to each other the yrarp f (or g) which rises from below warp e crosses and recrosses with respect to the warp w, thefilling it being introduced over warp w in each instance.

All the crossings of warps are effected by harness, and it' will be preferable to have the harness move the warps w in the forming of the sheds in which they are 1nvolved.

pile loops 3, Fig. l, or 4,

'The shot's'offilling may be left in the Fig. 2, or if the pile loops are cut to leave tufts they may be removed.

' without deflection; and it is possible in beat.-

In any event, the fabric produced is one I which is characterized by little capability to stretch longitudinally of the warp because one warp exists therein more or less, entirely ing up to pack the material formed bythe,

flooser warps and weft or filling tightly together, thus to form a closely woven or compact fabric. That is to say, the value of the fixed or false warp mis that'it serves not merely in the forming of the pile by supporting shots of the filling but in preserving' the compactness of the fabric as determined by the reed in beatin up: thus, as amatter of fact the farther te'warp :0

projects forward, and consequently the more extensive the grip of the fabric on this warp, the more compact will the fabric be. Having thus a medium to preserve a certain v degree of compactness attained by the reed,

I form my fabric, not as shown in my here- 'inbefore mentioned patent, so that all .the

shots of filling except those in the pile loops are in'the same plane and so that each of.

the groundfwarps becomes sinuous and so is capable of allowing the fabric to stretch,

' but with one warp tight and with the most of the shots of filling above this tight warp, such ti ht war making the fabric fnonstretcha 1e and t e specified arrangement of the filling, with the interweaving of the other or looser warps therewith, resulting in a massing of threads above thetight warp that increases and renders even more per- :nianent the compactness of the fabric as 'a whole as well as brings the pile itself into holding the'latter against advance.

closer and more" compact disposition than otherwise, the resulting product being a fab- "ric which may be quite thin and pl able and yet is strong, rich, and uniform in texture and in which the pile so completely covers 'that, though the pile be uncut, the body or ground of the fabric will not be revealed between the rows of pile loops except the fabric be bent quite sharply in the' transverse direction. j It is new in weaving, so aware, to interweave warps and filling between a tighter warp and a false warp having free ends, and at intervalsbind'by filling one of the first-named warps to the tighter warp and at intervals also bind by filling-one of the first-named warps to the false warp, -advancing the first-named andtlght warps in the direction in which the.

crossing through. .a tight warp, around filling at one sidev thereof and then back through the tight warp one of two other and less tight warps, and, between eacht'wo such intervals and i at the other side'of the tight warp,- crossing said. lesstight warps three or more times with respect to. each far as I am other andalso one of them through a false warp having free ends, around filling and back through said false warp, all-while simultaneously advancing the tight and lesstight warps relatively tothe false'warp in r the direction in which the free ends of the latter project.

In testimony whereof I aflix my signature.

on ons KOCH.

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