Method and device for pneumatic threading in a double hollow pin

Details Method and device for pneumatic threading in a double hollow pin Method and device for pneumatic threading in a double hollow pin

1992-01-07

1993-06-22

Hail, III, Joseph J.

Textiles: spinning, twisting, and twining

Apparatus and processes

Threading up

57 5852, 57 5883, 57281, D01H 918

Patent

active

052207773

ABSTRACT:
This invention relates to a method for pneumatic threading in a double-twisting doubling frame having a double hollow pin twisting spindle, in which the two thread feeding bobbins are disposed coaxially, one above the other, in the head of the spindle, and each individual bobbin engages its own hollow pin, this method providing for removing the initial length of thread from the lower bobbin in order to advance it into the hollow pin of the upper bobbin and also removing the initial length of thread from the upper bobbin and holding together the two said initial lengths of thread so that they rest on the inlet of the upper hollow pin, a head connected to a source of compressed air coming towards and being pressed against said upper hollow pin, allowing for both the lateral displacement of the braking device and the injection of compressed air for pneumatic threading.

REFERENCES:
patent: 3029587 (1962-04-01), Kresslein
patent: 3119224 (1964-01-01), Kocks
patent: 3636698 (1972-01-01), Nakahara et al.
patent: 4047372 (1977-09-01), Horstmann et al.
patent: 4199929 (1980-04-01), Vessella
patent: 4355500 (1982-10-01), Yanobu et al.

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