Textiles: spinning – twisting – and twining – Apparatus and processes – Stopping or starting
Patent
1982-09-30
1984-11-13
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Stopping or starting
57280, 57340, 57348, D02G 108, D01H 1316
Patent
active
044817622
ABSTRACT:
A yarn false twisting apparatus is disclosed which has a control system which is designed to insure that the machine operator will properly complete the yarn thread-up procedure, and which also effectively precludes damage to the twisting apparatus if the thread-up procedure is not properly completed. The twisting apparatus includes a pair of yarn twist imparting members having cooperating friction surfaces for engaging a running yarn, a drive whorl which is operatively connected to the twist imparting members, and a pivotally mounted control arm which is connected to the drive whorl and which is pivotable between an operative position wherein the whorl engages a drive belt, and an inoperative position wherein the whorl is disengaged from the drive belt. In its operative position, the control arm is spaced from the yarn path through the twisting apparatus, but when the arm is moved to the inoperative position, the arm deflects the yarn from its normal path to thereby alert the operator to the inoperative condition of the apparatus. Also, when the yarn is thus deflected by the arm, the yarn will be withdrawn from the twisting zone of the twist imparting members, to thereby effectively preclude the possibility of a running yarn moving between the friction surfaces of an inoperative apparatus.
REFERENCES:
patent: 3911661 (1975-10-01), Naylor
patent: 4235071 (1980-11-01), Dillon
patent: 4301648 (1981-11-01), Adenheuer et al.
patent: 4325213 (1982-04-01), Adenheuer
patent: 4370852 (1983-02-01), Oberstrass et al.
Barmag Barmer Maschinenfabrik AG
Petrakes John
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