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1. (WO2018197970) A CIRCULAR KNITTING MACHINE AND A METHOD FOR MOVING THE NEEDLES OF A CIRCULAR KNITTING MACHINE

Pub. No.:    WO/2018/197970    International Application No.:    PCT/IB2018/052072
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Wed Mar 28 01:59:59 CEST 2018
IPC: D04B 15/68
D04B 15/32
Applicants: SANTONI S.P.A.
Inventors: LONATI, Andrea
ALGHISI, Mauro
LODRINI, Maurizio
Title: A CIRCULAR KNITTING MACHINE AND A METHOD FOR MOVING THE NEEDLES OF A CIRCULAR KNITTING MACHINE
Abstract:
A circular knitting machine comprises a needle-holding cylinder (2) having a plurality of longitudinal grooves (4) arranged around a central axis (X-X), and a plurality of needles (3), each being housed in a respective longitudinal groove (4). A drive chain (5) for each needle (3) is inserted into each longitudinal groove (4), is located below the respective needle (3) and is operatively placed between the respective needle (3) and actuating cams (C). The drive chain (5) comprises a sub-needle (6) slidingly arranged in the respective longitudinal groove (4) below the needle (3) and having a butt (19), wherein the butt (19) is radially movable between an operating position, in which it is extracted so as to engage with respective first paths defined by first actuating cams (39) and cause the activation of the needle (3) and the stitch formation, and a non-operating position, in which it is retracted so as not to engage with said first paths (inactive needle). A selector (9) is arranged under the sub-needle (3) and a punch (7) is arranged between the sub-needle (6) and the selector (9). An activating element (8) is slidingly arranged in the respective longitudinal groove (4) between the sub-needle (6) and the selector (9), can be longitudinally moved with respect to the punch (7) and with respect to the sub-needle (6) and can be operatively engaged with the sub-needle (6) so as to switch the butt (19) of the sub-needle (6) into and retain it in the respective operating position.