US1611619A - Manufacture of machine-braided lace - Google Patents

Description

Dec. 21,1926. Y 1,611,619

E. TURCK MANUFACTURE OF MACHINE BRAIDED LACE Filed April 1. 1925 v InVen for: ye 73/14" 3y wrru l v Patented Dec. 21, 1926.

UNITED STATES EUGEN TURCK, or BARMEN, GERMANY.

/ MANUFACTURE or MA CHINE-BRAIDED LACE.

Application filed April 1, 1925, Serial No. 19,777, and in Germany April 11, 1924.

The present invention lam reference to' improvements in the manufacture'of lace on the single thread-Malhere braiding machine described in the U. S. Patent No. 613,380,

5 in which a lace web is continuously formed in tubular shape about a stationary mandrel,

. and is subsequently drawn off the mandrel and opened out fiat. In the prior art the closed lace tube or hose was formed by unitingthe longitudinal opposed fabric edges by means of auxiliary interwoven threads,

' which later, for the purpose of opening up the tube, had to be out and then withdrawn, which procedure wasted time and material.

In the later art it was proposed to do away with these edge-connecting auxiliary threads by guiding the fabric edges on wire members and running one or more steadying threads in zig-zag fashion over these wire guides, as described for instance in the U. S. Patent No. 1,024,247. When the lace tube thus formed was drawn off the mandrel, these steadying threads, which were not'embodied in any way in the lace structure proper, readily slipped off the wire guides along with the lace edges, and were then recovered for repeated use, and'the lace tube was then automatically opened in well known manner and laid out flat. In practical operation this procedure, however, was found defective for various reasons, mainly because it did not prevent, as was hoped, the deformation of the web fabric upon the latterbeing drawnoff the mandrel.

Irf my endeavors to remedy this' serious drawback I found that this distortion and deformation of the web structure is due to the relative arrangement and action of the two drawing-off rollers of the old art, which are positioned at opposite sides of the 3 portion of the mandrel horizontally one behind the other, so that the web. is unevenly seized on opposite sides and is unevenly stressed and pulled out of shape.

According to the present invention this defect is effectively obviated by guiding and temporarily uniting the longitudinalopppsed edges of the web during and for a short period after the formation of the latter on stationary guide means, if desired with the aid of one or more auxiliary threads, and by then seizing the web tube and drawing it off the mandrel by means of two horizontally alined draw-off rollers, which are caused to 'pullingly act on opposite sides of the web vent thereby one-sidedstrcss and undue dis tortion and deformation thereof.

During the drawing-off step the longitudi nal web edges automatically slide off the guide means,

whereupon the web tube is opened out flat in the well known manner.

The use of theauxiliary threads can also be dispensed with entirely by providing only a single guide element for temporarily .unit-edly guiding the longitudinal edges of" the forming web tube.

The accompanying drawing illustrates by way of. example apparatus for carrying out the new method, in which drawing Fig. 1 is a side-elevation, partly in section, of the thread collector and draw-oil mechanism, and

Fig. 2 is a plan view, partly in section on the line 2-2 'in Fig. 1.

Referring to the drawing, Z) indicates the closed ring collector in which the braiding threads unwinding from bobbins (not shown,-run together and at the lower edge of which, the web is formed. As usual the collector b surrounds a stationary mandrel c whileleaving therebetween a passage for the web a, which mandrel at its lower portion has a circular cross-section whereas, at its upper portion, it has a fiat, rectangular cross-section. Upon this mandrel the web a is formed in well known manner. According to the present invention, the web is obtained in tubular form by guiding the two longitudinal edges of the web on a single common guiding member (Z, the lower end of which is rigidly secured to the machine, and the upper end of which freely extends up through the collector ring Z). The longitudinal edges of the web are guided on the guide member for example by loops (1 of one edge and loops a of the other being so able shortened and its tapering alternately guided on the wire that the latter holds the web together in tubular 'form, while said guide member owing to its being embraced alternately by the. edge-loops of positioned opposite to each other at the same level, these rollers being situated .as

closely "as possible over the collector-ring b so that, immediately after leaving the latter, the Web surrounding the mandrel is gripped simultaneously on two opposite sides and consequently on its full or ap' proximately full width by the two rollers, and is in this way drawn off upwardly perfectly uniformly, In comparison with known mandrels the-mandrel c is considerfaces are curved to correspond with the operative contour of the peripheral faces of the draw-oft rollers h, h. Its terminal rectangularly flattened portion is preferably curved above t is draw-off rollers h, "h, to overhang one of the rollers. I

The guide member d is conveniently arranged in the middle plane between the two rollers 71., it so that it is located at one of the narrow sides of the flattened portion of.

the mandrel. Consequently the guide wire can extend into the intermediate space between the two the web when it is grasped and advanced by the rollers is still tubular form by ly is positively edges, this completely obviating deformation'.

Glaims.

1.The *described method of producing flat lace by the single thread Malhere braiding machine, which consists in held together in the during the travel of the tube from its formawhich is flattened off at its upper portion, and are draw-off rollers h, h, so that I the wire d, and consequent.

guided at its longitudinal Presenting a cylindrical braidingly' forming a longitudinally split web tube, in

flat lace by the single thread Malhere braid-- ing 'machine," which consists in braidingly forming a) longitudinally split web tube, in seizing and taking off this tube close above its formative zone simultaneously at circumferential points all equidistantly space from the formative zone, in unitingly guiding theweb edges during the travel of the tube from its formative zone to' the takeoff zone, and lisuniting and releasing them at the latter zone, and in tensioning the temporarily closed tube during its passage between these two zones.

3. Apparatus for carrying out the described method of producing flat lace, comprising in combination with the mandrel forming the tubular web, a pair of take-up rollers mounted relatively closely above the web forming zone, and stationary guide means terminating close to said rollers for temporarily guiding the longitudinal edges,

Web forming. zone, and stationary guide relation to.

means terminating in close said rollers for temporarily unitedly guiding the longitudinal web edges from ,the formative zone of the web to its take-off zone, the upper portionof the mandrel being conravely flattened to conform to the cooperating circumference of said rollers.

. Apparatus for carrying out the described method of producing machine-braided lace on a single thread machine, comprise ing in combination, a web-forming mandrel, body portion and a a pair of take-up each-side of said tapering head portion, rollers mounted one on mandrel close above the web-forming zone, and a stationary guide member arranged longitudinally of the mandrel in its middle plane and extending along one of its narrowhead edges up between the said two rollers for temporarily guiding the longitudinal edges of the web from, the point of its formation to the take-off point.

In test mony'whereof I aflix my signature.

EuGEn TURGK.

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