Patent ID: 8371144
Filing Date: 2013-02-12
Classification: D04B

Abstract:
1. A loop forming and loosening mechanism for circular knitting machines, comprising: a needle cylinder holding a plurality of needles located vertically; a sinker tray which is located at the circumference of the needle cylinder and includes a plurality of horizontal sinker grooves each holding a sinker; and a cam holder located above the sinkers to hold a plurality of cams, each cam including a first guide track and a second guide track to drive the sinker moving horizontally; wherein the sinker includes: a sliding segment including a sliding portion slidably located in the sinker groove; a loop forming and loosening ancillary segment extended upwards from one side of the sliding portion and then extended outwards and including a yarn pressing notch indented horizontally to assist the needle in loop forming and loosening, the yarn pressing notch including a first ancillary edge and a second ancillary edge respectively at an upper side and a lower side; a passive segment which is located above the sliding segment and driven by the cam and includes a protrusion extended upwards from the sliding portion and spaced from the loop forming and loosening ancillary segment; and an indented abrasion-reducing space which is located at one side of the sliding portion and below the loop forming and loosening ancillary segment such that the loop forming and loosening ancillary segment is movable directly and horizontally above the needle cylinder.