Abstract: The thread cutting and aspiration unit has a vertical cutter supporting post which is shifted towards the axis of a toothed thread trimming disk. A cutting blade associated with each cutter is mounted at the end of a lower L-shaped portion of a corresponding supporting post. The L-shaped portion allows thread to pass beyond the cutter and to be cut by a following blade, so that a considerable length of thread can be aspirated by an aspiration port.

Abstract: A device for feeding yarn to a circular knitting machine of double-cylinder type with a plurality of yarn guides, and a system for controlling and cutting the yarn ends. The device comprises a suction nozzle in a position external to the cylinders and a rotating cutting member positioned between the nozzle and the cylinder surface and downstream of the nozzle towards the direction of rotation of the needle cylinders.

Abstract: In the procedure for ensuring a precisely positioned introduction of a substitute yarn in a knitting machine by means of a substitute yarn (15) which is attached by a knotter (13) to a running yarn (12), the machine is halted at the desired position for the change of yarn before or after formation of the connecting knot (16) and afterwards the length of yarn located between the knotter (13) and the yarn working position is drawn out past the connecting knot (16) and taken up to one side and the machine is only started up again when the yarn feeder (11) is feeding the substitute yarn.

Abstract: A tail shortener is applied to cylinder and dial circular knitting machines for knitting ribbed socks so as to shorten the yarn tails that would otherwise occur on each yarn change. The upper flange periphery 17 of the dial 15 is formed with uniform yarn catching notches 16 arranged between slots 18 for dial hooks and cast-offs. A yarn lead-in surface 13 is formed in the outer periphery of the dial head 10' above the dial flange 17, and yarn lead-in surface 13 is located rotationally beyond yarn feed fingers 22 to extend inward of the radially inner extremities of yarn catching notches 16 in dial 15. A yarn cutter 30 mounted on dial head 10' near lead-in surface 13 is urged against upper flange 17 of dial 15 and arranged so that yarn catching notches 16 run under yarn cutter 30.

Abstract: Both the leading and trailing ends of the respective yarns introduced to and removed from active knitting position are of uniform length on the inside of the sock when forming solid color patterned areas in the sock. The cutting of all yarn ends inside of the sock, enables the operator to easily evert and inspect the inside of the socks as they are removed from the knitting machine and eliminates the usual time consuming operation of cutting the yarn ends after the sock is knit. The cutting and clamping apparatus is illustrated in association with a four-feed solid color patterned knitting machine of the type normally employed in knitting argyle patterns in socks, and includes a vertically disposed suction tube with the lower end disposed within the upper end of the needle circle. A yarn clamping member is associated with the lower end of the suction tube and a hot wire cutter is positioned between the needle circle and the clamping member.

Abstract: An attachment for use with multi-feed circular knitting machines of the type having a rotary needle cylinder and having yarn striper boxes at the feeds thereof. The boxes serving to change and to cut and clamp the yarns fed to and knit by the machine during the making thereon of coursewise striped fabric. The yarn changing operation resulting in undesirably long unknit terminal portions of the changed yarns extending inwardly from the inner side of the tubular fabric being made. The terminal portions of the yarns having cut ends. The attachment comprising a device having yarn clipping means disposed within the tubular fabric and rotating in unison with the needle cylinder to cut and to shorten the terminal portions of the changed yarns as the tubular fabric continues to be made, whereby the yarns are cut firstly by the striper boxes and secondly by the yarn clipping means.

Abstract: A circular knitting machine has a device for cutting and holding elasticized yarns, such as spandex. The device enables the yarn, when detached from the knitting needles, to be cut while holding the free, cut end of the yarn firmly in position so that the yarn later may be easily reattached to the knitting needles when it is desired to reintroduce the spandex yarn into the knit fabric. The device includes a pair of jaws movable in unison, one jaw being effective to grip the yarn and the other jaw thereafter being effective to cut the gripped yarn.