US1877850A - Knit goods - Google Patents

Description

R. GRABNER Sept. 20, 1932.

KNIT GOODSV -FL1d June 5. ,1931 2 sheets-sheet 1 Patented Sept. 20, 1.932

RUDOLF GRABNER, F HOHENSTEIN-ERNSTTHAL, G'FB'MLAN'Y'` KNIT GOODS Application filed June 5, 1931, Serial No.

The present invention relates to a method of producing double-sided and ladder-.proof .knit oods which, unlike the known fabrics of this type, retain their elasticity.

According to the present invention, prior defects are eliminated by rendering the goods ladder-proof by drawing the loops of one needle row throu h the loops of the opposite row before knoc ing them over. For this purpose, the two needle rows are disposed in a downwardly inclined positionexactly opposite one another and not in staggered relation to each other, and the needles of one row are driven out or lowered only after the needles of the opposite row have been knocked over. The lowered needles pass through the loops formed by the opposite needles, and when they have passed through these loops far enough to expose their open latches, they are supplied with thread and drawn back, so that their thread is drawn through the loops of the other needles to form loops. The thread is held very tightly on the needles which will avoid ,the slipping oir' or the missing of the needles to enter each loop or to drop a loop, which is a material advantage.

0ne way of applying the ,method according to the invention is illustrated, in the accompanying drawings, in which Figures 1 to 5 show various steps in the process; Figs. 6 and 7 are, respectively, a side and front view of special parts serving for closing the latches after the latter have caught the thread; Fig. 8 is a top view of the two beds of a knitting machine; Fig. 9 is an oblique view of a plurality of needles arranged side by side to carry out the process; Fig. 10 is a view of the doublesided goods obtained by this method; and Fig. 11 is a view of the loops of a fabric roduced by racking the needle beds over a ivision before starting a course.

r)Che needles of the two needle rows 1 and 2 incline downwardly at an angle of approXi' mately 30o and are moved so that while needles of one row are lowered those of the opposite row are raised, i. e., knocked over. The needles of the two rows 1 and 2 carry, for example, the meshes 3 and 4, and the needles of the two rows 1 and 2 are in knocking over position (Fig. 1). Now, if the 542,401, and in ermany June as, isso.

needles of row 1 are lowered, their heads will pass through the loops 4 of the needles of row 2 (Fig. 2), since the needles of both rows are placed exactly oppositev one another, and the needles of' row l continue to move through the loops 4 until their openedlatches are 1n front of the meshes 4, as indicated lin Fig. 3. While in thisv extreme position, the needles of row 1 are supplied with the thread 5 and drawn back, so that the thread 5 is passed through the meshes 4 of the needles of row 2 and formed into loops as on a knitting machine, whereupon the needles of row 1 knock their loops 3 over the looped thread 5 (Fig. 4). At the end of this operation;r both rows 1 and 2 arein knocking over position again,

but the` action of the needles is changed in so far as the needles of row 2 are lowered now and pass through the newly formedloops of the needles of row-1k (Fig. 5.) to be supplied with thread by a thread-guide arranged opposite to them and not shown. r

If machines havi'nf1r individually movable needles are concerned; such as, for example, flat knittin machines, not all needles of ,one row will jointly pass through the loops of the other row (Fig. 8) but subsequently one after the other and always at the very. moment when the needles of the opposite row vhave just been knocked over. 4`

The method can he carried out also vonmachines whose needle rows vconstitute units as,

for example, in double rib warp frames. In this case, one needle bar knocks over first whereupon the to pass throu So far as the invention itself is concerned, it is immaterial whether the needles can be moved singly'or jointly.

The method could be supplemented in so"- far as it would be possible to dispose the two needle rows in staggered relation after the completion of a course, so that the needles of one row would pass through the loops of the needles of the opposite row adjacent to the This would result ones penetrated before. y fabric of the kind in the production of a shown in of the loops produced.

opposite needle bar is lowered h the meshes of the first-bar. y

Fig. 11, which is even superior to the goods shown in Fig. 10 as to the firmness l As the latches of the needles passed through lthe loops as described may not always close automatically during the return of the needles for the reason that the penetrated loops hanging on to their needles are lifted off on top by the penetratin needles, small latch closers (Figs. 6 and 7 may be positioned in an elastic and oscillatory manner above the needles, which embrace the needles and, during the return of the latter, are disposed so that the latches must strike them to be closed thereby. These elastic and oscillatory latch closers 7 may, vfor example, be secured to the needle beds and controlled by special rods 8 or the like in such a way that t ey are lifted out of the needles after the latchesv are closed to prevent interference with the further work of the needles.

1. A method of producing doublesided knit goods on a hosiery or knitting machine with two downwardly inclined needle rows consisting in lowering at rst only the needles of one of the two rows arranged exactly opposite one another when the needles of the opposite row are knocked over, causin the needles of the first row to pass throng the meshes of the needles of the other row, supplyin the needles of the rst row with threa drawing back the needles of the first row with their thread through the meshes already penetrated by them in order to form loo s and in causing the penetrated meshesto be ocked over the loops drawn through them.

2. A method as claimed in claim 1, according to which one of the two needle rows is racked after the completion of a course and the lowered needles are passed through the meshes of the needles adjacent to the needles of the opposite row.

In testimony whereof I have aixed my signature.

RUDOLF GRABNER.

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