US2302790A - Method of and apparatus for producing glass yarn - Google Patents

Description

Nov. '24, 1942. P. MODIGLIANI METHOD OF AND APPARATUS FOR PRODUCING GLASS YARN Filed Oct. 24, 1958 Patented Nov. 24, 1942 METHOD OF APPARATUS FOR PRODUO IN G GLASS YARN Piero Modigliani, Livorno, Italy, assignor, by

mesne assignments, to Owens-Coming Fiberglas Corporation, a corporation 01' Delaware Application October 24, 1938, Serial No. 236,77

In Italy November 5, 1937 8 Claims. (01. 28-1) In a prior United States application of Aldo the direction of draw of the yarn are in the same Ceretti filed November 2, 1937, Ser. No. 172,423 direction as the draw. is described a process of producing a yarn, or The nozzles may be provided with means to thread, from a strip of vfibres crossing each other produce the tangential introduction of air therein at a substantially constant angle by drawing the so as to cause the fibres to become helicoidal. strip in a direction to the transverse general In Figure 3 I hav shown interposed between direction of the lie of the fibres, whereby a more the drum 4 and the nozzle I a heating chamber or less substantially parallel arrangement of the 8 consisting of a tube surrounded by a cylindrical fibres in the resultant yarn is produced. electrical heating element 9 whereby-the fibres The present invention has for its object to in- 10 become heated prior to their entry into the nozzle crease the parallelism of the fibres by subjecting where they are suddenly chilled by the air blast. the y prior to the time it is reeled, to a cur- This heating and rapid chilling serves to temper rent of air having a relatively high velocity in the fibres and yarn. respect to the movement of the yarn whereby a In Figure 4 I ave Shown y e t o 88 combing efiect on the yarn is produced. embodying all of the several features before de- The present invention has an additional obscribed. In this figure the yarn is first subjected Ject in providing means by which the fibres in to the air currents moving in the sam direction the yarn may be tempered and thus set in their as the yarn. It is then passed around a reversparallel relation given by the preceding part of mg drum "1 and p s through the chamber 8 this invention. of Figure 3, after which it passes around a sec- Referring to the accompanyin drawing in 0nd reversing drum II and through a nozzle simwhich corresponding parts are designated by corilar to that shown in Fi u e 1 d c p e si n responding marks of reference, rolls 5, similar to Figure 1, to be wound on the Figures 1 and 2 are t rn tiv means of carry... .reel 6. I have also shown in dotted lines in this ing out th first bj t of thi invention; namely 5 figure a supplemental air-combing and chilling combing the yarn by th a ti of an n- 1 1; tube I2 interposed between the heating chamber Figure 3 is a diagrammatic view illustrating ina and t drum strumentalitie b which tempering of the yarn l laving' thus described my invention what I is effected accordingto the second feature of the new and desire to secure by United invention. States Letters Patent is:

Figure 4 represents the several embodiments The hereinbemre described method 0f P of my invention before referred to as embodied paring yam of glass fibres comprising pulling a in an unitary structure for the production of a mat of crossed fibres m a direction at an milk to yarn, the fibres of which are substantially part of fibres and during such. l allel throughout except for such helicoidal twist Jectmg the pulled yam to a high Velcclty ing as may be desired and which may be temcurrent parallel thgrgwithpered when in place in the yam 2. The herembefore. described method of are m Figure 1 the web or mat is ShOWl'l to be deparing glass yam which in 33 3? i livered from the drum 4 to the reel 6 on which mat of fibres and during the p lling subjecting 40 the fibres to a tempering action.

it is wound as the yarn. In its passage from the drum to the reel it passes through the nozzle 2 h i g fi method 95 E: through which strong currents of air are blown gs? z ass 25 c g gi m diawmg in a direction against the movement of the fibres y r a m 0 010556 3 and app 137mg to the yarn during the drawing thereof current under the pull of the reel 6 and through a pair of pressing rolls The nozzle 2 is of the as of high velocity air moving substantially paralwi with the yarn and in a direction 0. osite to the P ype; at 15 to say, not only e the fibres travel of the yarn during the draw i g operation. subjected to the drag of the air introduced into The herembefore described methad of pea the nozzle from the source of supply by the pipe paring glass yam which comprises pulling a but the high VelOcitY current Produced yarn from a mat of crossed fibres and durin in e asp tor p n n Under such n ipulling subjecting the yarn to a temperin action tions, the fibres tend to straighten out and beand t high 1 t 1 m; waving para come parallel. allel therewith.

.In Figure 2 the arrangement is the same except 5. The hereinbefore described method of pre that the air currents instead of being against paring a yarn o1 glassfibers comprising drawing a mat of crossed fibers in a direction at an angle to the lay of the fibres and during such drawing subjecting the yarn to a high velocity air current moving parallel therewith and in the direction of the movement of the yarn being drawn.

6. The hereinbetore described method of rendering parallel fibres of a glass mat laid in predetermined crossed relationship which includes reel for exerting a pulling action on the yarn, and an aspirator nozzle through which the yarn passes, so constructed and arranged as to direct its blast of high velocity air in a direction parallel to the yarn passing therethrough.

8. In an apparatus for preparing yarn from glass wool, the combination of a drum for supporting and supplying a strip of glass fibres, a reel for exerting a pulling action on the glass wool to form a yarn, and a heating chamber through which the yarn passes from the drum tothe reel.

PIERO MODIGLIANI.

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