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Weft mixer

  • US 4,964,443 A
  • Filed: 06/16/1989
  • Issued: 10/23/1990
  • Est. Priority Date: 06/17/1988
  • Status: Expired due to Fees
First Claim
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1. A mechanism for presenting weft threads on weaving machines during a plurality of weaving cycles, said weaving machine operating at a particular machine speed, comprising:

  • a plurality of thread presentation arms which swivel to and fro between two positions;

    a cam mechanism;

    drive means for driving said cam mechanism at half said machine speed;

    two cam follower devices supported by means for permitting the cam follower devices to move independently of each other in response to movement of said cam mechanism;

    armature means including two armatures for each thread presentation arm, each armature connected to a respective cam follower device, for moving the thread presentation arms between said two positions in response to movement of the cam follower devices upon engagement with the thread presentation arms;

    engagement means to enable a plurality of said armatures to engage their respective thread presentation arms during each weaving cycle, at particular moments and during a particular period;

    disengagement means to force said armatures to disengage said thread presentation arms; and

    holding means to hold the thread presentation arms in a position into which they have been moved by the armatures,wherein said cam mechanism and the cam follower devices impart reciprocating movements to the armatures such that, alternately, for each successive weaving cycle, the armatures connected to one of the cam follower devices cause the movement of one of the thread presentation arms into a presented position, while the armatures connected to the other cam follower device move back to a rest position a thread presentation arm which has just been presented.

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