Officine Savio S.p.a.

Luciano Luchi

Ettore Negri

A process for operating and controlling compound needles that have reciprocal travel of the needle and slider restricted by abutment surfaces where the needle is lifted high enough to engage yarn but less than the travel of the needle and slider and the descent of the needle. Before the needle descends, the needle is lifted selectively to bring the upper end of the slider above the plane of knock-over of the sinkers through the action of abutment between the needle and slider. Needle descent takes place along at least two successive slopes in a track with different descent inclinations, the second slope being the steeper. Slider recall by the needle begins before the needle is brought down again by the second slope. Improved stitch-forming cams to permit compound needles to operate in accordance with the foregoing process are disclosed also.

Compound needle and knitting machine

Procedure for knitting hose with a toe and heel in a circular knitting machine having more than one feed and two needle cylinders. All needles are brought to an upper path during knitting of the toe and heel with alternating motion, and at every oscillation of the cylinder those needles alone which have been selected to knit the course relative to the oscillation are brought back to work from the upper path towards a lower working path. The selection of needles is brought about by cooperation between fixed radial cams situated so as to correspond with the main feed and appropriate selection actuators. The selection for jacquard designs takes place upwardly from the lower path to the upper path by cooperation between appropriate selection actuators and movable radial cams located so as to correspond with each feed. The upper path serves to exclude the needles of the lower cylinder from work and also to protect the upper cylinder needles, the lower path being the path for jacquard designs. The apparatus relates to a circular knitting machine which has more than one feed and a double cylinder.

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Tavernuzze Impruneta, Italy

Luciano Luchi