Service device and method for applying an air blast to a broken

Details Service device and method for applying an air blast to a broken Service device and method for applying an air blast to a broken

1987-01-12

1988-03-08

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Clearing

57261, 57278, 57279, 57304, 242 356E, D01H 1500, D01H 1300, B65H 5422, B65H 5488

Patent

active

047292164

ABSTRACT:
A service device in a ring spinning machine is moved after a yarn break to the appropriate spinning position to separate the broken yarn end from the winding by generating an air blast that acts on the yarn end. If the winding build-up is in a stage in which the initial winding cone has not yet been completed, the air blast is set at a high value so that a relatively strong separating force acts on the broken yarn end. If, on the other hand, the build-up of the winding cone has been completed, the separating force acting on the yarn end is less. The stage of the winding build-up is determined with the aid of a switch, which is connected to a stop member that contacts and rests on the ring rail of the spinning position. The setting of the two air blasts is performed by a switchable trottle. Taking into consideration the stage of the winding build-up when setting the air blast that acts on the yarn end assures that the broken yarn end is separated in every instance from the winding, yet prevents loops from being separated at the same time.

REFERENCES:
patent: 3236464 (1966-02-01), Wey
patent: 3637148 (1972-01-01), Kupper
patent: 3807155 (1974-04-01), Miyazaki et al.
patent: 3813865 (1974-06-01), Hohloch
patent: 3868813 (1975-03-01), Vignon
patent: 4132057 (1979-01-01), Weiss et al.
patent: 4565062 (1986-01-01), Nickolay
patent: 4570433 (1986-02-01), Nickolay

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