Abstract:
By the use of special latch needles (21) whose latch (14) can take up two stable positions lying within the limits of its pivotal movement and out of which it can be moved only against the action of a spring, there is ensured, even in fast running flat knitting machines with a transfer mechanism and with stitch presser and/or stitch hold-down elements, and even during the formation of long, loose stitches and loops, reliable trapping of the yarn and manipulation of the stitches and loops by the knitting elements. (FIG. 2)
Abstract:
This invention relates to a knitted fabric spreader device for flat knitting machines which have spiked rotatable rollers (14) disposed beneath the comb gap (12) of the needle beds of the machine. The spiked rollers (14) are mounted over the full length of the needle beds (10, 11) on a common carrier rod (13) concentric with this rod, and the common carrier rod (13) can be moved transversely to the longitudinal direction of the needle beds to provide for clearance of the comb gap (12) of the machine. To cater for this adjustment the carrier rod (13) is held on at least slides adjustable by means of a control cam (27). The rollers (14) are so mounted between eccentric intermediate discs (15) provided with a smooth peripheral edge that spikes (38) of the rollers (14) project radially above the intermediate discs (15) over a part only of the carrier rod (13) to engage the knitted fabric (29) (FIG. 2).
Abstract:
A front yarn guide element (11) of the yarn stop motion (10) has the shape of a yarn guide eye (12) formed by a wire spiral into which a yarn can be introduced from the side and deflected to all sides without danger of slipping out. The yarn guide eye (12) is provided with a supporting part (17) located so as to be longitudinally movable in the housing (18) of the yarn stop motion (10), so that the spacing of the yarn guide eye (12) from the position (B) at which the yarn stop motion (10) is secured is adjustable.
Abstract:
In a device for setting the adjustable traverse of a plurality of yarn feeders of a flat knitting machine, the yarn feeder limit stops (19) associated with each yarn feeder slide (15) are preferably formed as signal generators and are arranged to be longitudinally slidable on separate guide tracks of the yarn feeder rails (10-13) so that the yarn feeder slides (15) can overlap the associated yarn feeder limit stops (19). The yarn feeder limit stops (19) effect a switching procedure for the coupling devices (28) located on the cam carriage (14) which effect the movement of the yarn feeder slides (15).
Abstract:
A cam carriage for flat-bed knitting machines has at least one leading and trailing draw-down element, having a drive top plate and a bottom plate with a draw-down track located at opposite sides of a cam plate in which a draw-down element is placed movably between an alignment position and several casting-off positions in a guide slot, and the driven top plate is rigidly connected with a drive element at least in the direction of the draw-down position. In such a cam carriage for flat-bed knitting machines, the draw-down elements of which provide a very high draw-down force on the one hand, and, on the other, react with sufficient resilience during the movement in the direction of the draw-down position, it has been provided that the top plate and the bottom plate, of the draw-down element are movable in relation to each other and are biased to take up a basic position such that a relative movement of the top and bottom plates can only be performed during a shifting movement of the top plate in the direction of one of the draw-down positions.
Abstract:
A device for the control of a flat-bed knitting machine for the positional determination at lift reversal of the carriage assembly driven by a reversible motor has a phase-shifted pulse generator device on the carriage assembly which can be moved back and forth and a stationary pulse generator board device in the area of the needle bed arrangement. With such a device a reproducible lift reversal can be performed in the area of the ends of the needle bed as well as at any desired location along the needle bed arrangement, the pulse generator board device has a pulse generator board extending along a needle bed of the needle bed arrangement. During lift reversal the pulse sequences of a pulse generator associated with the pulse generator board are detected in a calculator unit and compared with the pulses associated with the locations for the beginning or alternatively, the end of the lift reversal which have been preset by a program, and the calculator unit performs a speed change during the detection of the lift reversal pulses in dependence an overrun set by the program and the present working speed.
Abstract:
In a method for the production of intarsia knitted pieces on a flat-bed knitting machine, at least some of the yarn guides associated with each one of the intarsia areas and the respective needle bed are moved in a direction relative to each other when one of the needle beds is traversed in both lift directions by a carriage provided with one or a plurality of cams in the border area between two areas of intarsia, and the yarn guides are being coupled with the movement of the carriage in each intarsia area. At the end of a movement segment which extends at most across a number of intarsia areas corresponding to the number of cams, the carriage is reversed in its lift direction and returned, together with the yarn guide last used as well as with the yarn guide to be used for the following intarsia area, to the intarsia area last produced, without making a needle selection. In a further movement segment, a further number of intarsia areas corresponding at most to the number of cams is produced in the original lift direction. Becanuse of this a larger number of intarsia areas or colors can be knitted than corresponds to the number of cams in the carriage used without requiring steps which would reduce the production capacity and increase the costs.
Abstract:
This describes a fabric take-down device (11) for flat knitting machines which is provided with a driving motor (12) and an associated adjusting device (13) to set the torque of the driving motor (12) which determines the take-down pull through the motor current.In order to provide in a fabric take-down arrangement (11) of this character for a substantial starting and controlled pull, and in particular to cater for a finely-sensitized regulation even in the area of small torque values, provision is made for the adjusting device (11) to be constituted by a motor-current regulating system (26) which is provided with inputs (27, 28, 33, 34, 39) for setting the target figures and for at least one actual value taken from the driving motor (12), and the regulating system (26) further has an input (32) for an augmenting shift pulse for a short-term increase in the torque of the driving motor (12) where there is a small target tongue (FIG. 1).
Abstract:
The dust extraction device located on the cam carriage (13) of the flat knitting machine has separate, independently operable suction fans (27) for the front and rear needle beds (11,12), which, by lowering of the suction nozzles (29,30), the use of smooth-walled suction ducts (31,32) and coupling of the dust containers (37) with the suction ducts and with the suction fans (27) ensures a good cleaning effect with low expenditure of energy and a maintenance free operation.
Abstract:
In the yarn tension regulating device for knitting machines in which the yarn (25) runs through a yarn tension sensor (24) and a yarn brake (20) automatically adjustable in dependence upon the indication of the yarn tension sensor, there is located directly in front of the automatically adjustable yarn brake (20), in the direction of travel of the yarn, a yarn forwarding device, in particular a yarn storage feeder (13), by which the tension imparted to the yarn on its path from the yarn spool to the yarn brake is relieved. Between the yarn brake (20) and the yarn tension sensor (24), which follows it in the direction of movement of the yarn, is located a known yarn take-up (21), whereby the automatically adjustable brake (20) constitutes the yarn brake usually provided for this yarn take-up.