Device for pneumatically threading a yarn in a double twist spin

Details Device for pneumatically threading a yarn in a double twist spin Device for pneumatically threading a yarn in a double twist spin

1981-10-06

1983-07-05

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Threading up

57 5886, D01H 1500, D01H 786

Patent

active

043910904

ABSTRACT:
The invention relates to a device for pneumatically threading a yarn in a double twist spindle. It is disposed inside a sleeve connecting two tubes adapted to constitute the central shaft of a double twist spindle. A yarn brake capsule passing through the flat rod of a piston is disposed inside the sleeve, its ends abutting against the opening of the bore of one tube and against that of the central hole of an end piece mounted at the end of the other tube. When compressed air is sent into the bore of the first tube, the piston is moved, causing a lateral shift of the yarn brake capsule, thus allowing passage of the yarn along the bore of the spindle. The invention is particularly applicable to double twist spindles.

REFERENCES:
patent: 4168605 (1979-09-01), D'Agnolo
patent: 4199929 (1980-04-01), Vessella
patent: 4281508 (1981-08-01), Frentzel-Beyme
patent: 4354343 (1982-10-01), D'Agnolo et al.

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