GB744670A - Improvements relating to the manufacture of knitted fabrics - Google Patents

Abstract

744,670. Knitting-machines. NEBEL, M. Jan. 21, 1953 [April 24, 1952], No. 1759/53. Class 74 (2). In a method of knitting a fabric having held loops, alternate needles knit at one feeder and the loops between these needles are held on web-holding instruments and subsequently knitted by the intervening needles at a second feeder; the instruments, after having transferred the loops to the intervening needles and having been retracted from between the needles, are re-advanced with the most forward part of the instrument disposed at a higher level than the level at which the loops were transferred to the needles. If the web holder shown in Fig. 7 is used, the loops are drawn on a ledge Pa and are held in a throat Pb for penetration by the needles. The under edge of the rear end of each instrument is sloped, and on entry between the needles the instrument is tipped by a cam pressing on its rear end. The forward end is thus raised and rides over a loop which has been transferred to a needle and avoids pressing it into the latch joint. The web-holding instrument shown in Fig. 2 has a recess Pw on which a loop is drawn, and the tip Pv of the instrument is at a higher level than either its recess or throat; moreover the underside of the tip is slanted so that it is not necessary to tilt the instrument on entry between the needles. In both cases the instruments are disposed in tricks in a dial R inside the needle cylinder; long butt alternating with short butt instruments if each loop is to be drawn over only one instrument. In this event the instruments are provided with ledges Ps, higher than the ledges Pa, which keep the loops on the latches when the intervening needles are raised to clear their old loops beneath their latches. Each loop may, however, be drawn over a pair of instruments, in which case the instruments may be of the form shown in Fig. 15. In machines in which the web holders are disposed in tricks in a ring outside the needle cylinder, in place of a single instrument, instruments 15, 16 are provided in each trick. On entry between the needles each instrument 16 is tipped by a cam H3 so that the loop which has just been transferred to a needle is brought under a nose 16a. A new thread is laid on ledges 16a, 15u of the instruments, and the instrument 15 is retracted to sink a loop as the intermediate needles are lowered. Instrument 15 is then re-advanced and tilted downwardly by a cam H2 to the position shown in Fig. 20, so that the loop may be penetrated by the intervening needles. Instrument 16 is then retracted to bring the loop onto the nose 16a so as to keep it on the latch of a needle and also to bring it above a hook 15y of the instrument 15, both instruments being retracted out of the needle circle as the intervening needles descend. To draw longer loops the instruments may be held in their upwardly tipped condition while the loops are being drawn, and if the instrument shown in Fig. 15 is used, this must be done. Specifications 507,660 and 740,699 are referred to.