US1494317A - Cord fabric - Google Patents

Description

May 13 .1924" I INVENTOR y @ZM/WM wlw ` K ATTORNEYS' Patented May i3,

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FRANK PIERACCINI, JR., or SPRINGFIELD, MASSACHUSETTS, ASSIGNoR To THE EISK RUBBER COMPANY, or cHrCorEE FALLS, MASSACHUSETTS, A CORPORATION 0E MASSACHUSETTS.

CORD FABRIC.

Application filed September 19, 1919. Serial No. 324,903.

To'aZZ whom" t may concern:

Be it known that I, FRANK PIERACCINI, J r., a citizenof the United States of America, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful llmprovements in Cord Fabrics, of which the fol! lowing is a specification.

My invention relates to rubberized fabrics and in particular to what are known as cord fabrics which are inuse in the manufacture .of automobile casings.

It has for its object a fabric in which the thread or positioning elements will not interfere with the action of the cords or strainresisting elements. It has for a further object a fabric which will present a Substantially fiat surface with the cords parallel and without the frequent irregularities due to the weft threads which are present in the usual Similar fabrics. lt has for a further object a fabric in which there is a firmer bond between the rubber andfabric components than is the case with similar fabrics known at the present time# My invention will now be described with reference to the accompanying drawings, in

Fig. l is a fragmentary view of a fabric made according to my invention; and

Fig. 2 is a similar view of a thread fabric made according the previous practice.

'i at is known as thread fabric. is a type'of cord fabric composed of a warp of lcords, which serve as strain-resisting elements, and a weft of light thread, which preferably does not carry any strain'butV P0 Serves merely to hold the warp cords in sition and prevent their tangling during the covering ofthe fabric with rubber. In this usual construction the weft threads are spaced two or three, tothe inch, and run ,at right angles to the warp cords. The weft threads add nothing to the strength of the fabric, and in fact prevent," in the usual construction, kthe proper. functioning of the warp cords for the reason that they distort the cords slightly out of their normal flat position. Further, when the fabric is being built into a tire casing -the weft threads through their. binding action frequently prevent the cords takingup the position they would naturally assume. As one of According tomy invention I build the -v warp cords as before, and form the weft of light threads running diagonally of the fabric preferably in a zig-zag course. As a single weft thread engages several cords at l different longitudinal points of the fabric the retaining action of one thread is distributed overla very considerable distance, thus enabling the number of weft threads to be very greatly reduced. In practice the spacing of the weft threads vmay be varied as desired, but I have found that two threads to the yard will -give very satisfactory results. I do notwish to limit myself tol this spacing, however, as it will be apparent that the spirit of my invention will be retained "if the spacing is great enough so thatsubstantial distance occur between in terruptions to the normal flat path of the cords; `or,fexpressed in another'way, if the distance 'between successive weft threads is comparable with the widthof the fabric (at least after this has been severed into bias strips according to the usual practice) instead ofbeing comparable, as in the old form, with the Spacing of the cords. By having a` wide spacing of the weft threads several advantages `follow. There being fewer threads'there is less 'waviness in the cords due to the weave. The space between the threads is sufficiently great to 'present a relatively. large intermediate surface in which the cords lie fiat and without waves.

Due to thesame cause the cords will be free ric may be frictioned and skim coated on one or both sides, as desired.`

In Fig. l of the drawings represents the cords or strain resisting-elements, and 11 the diagonal filling of threads. In Fig. 2, 12 represents the weft threads laid according to the old practice. The fabric is usually cut into bias strips along lines 13 in the customary manner.

In the claims I have used the term cord to denote the strain resisting elements, of Whatever material composed and of Whatever construction and size; and the term thread to denote the iilling, Whether this bemade of what is commencially'known as thread or of rubber, or other material.

I claiml. A fabric composed of 'a Warp of closely spaced cords and a weft of relatively Widely Aspaced threads arranged in a. zigzag course. l

2. A fabric composed of a Warp/ of closely spaced cords and a weft of relatively of the fabric.

4. Avfabric intended for use in the manufacture of pneumatic tire casings, said fabric being composed of a Warp of fibrous elements capable of resisting the strain to Which the completed tire structure is to be subjected, such elements being spaced rela# tively closely together, a weft of positioning threads arranged in a succession of obliquely disposed courses, each course being in the opposite direction from thatimmed ately preceding it, and a layer of vulcanizable material lying on the face of the fabric and penetrating between the adjacent fibrous elements forming the Warp.

FRANK Pinaaccmr, JR.

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