Covering for drafting rollers

Details Covering for drafting rollers Covering for drafting rollers

2006-11-28

2006-11-28

Hurley, Shaun R. (Department: 3765)

Textiles: spinning, twisting, and twining

Apparatus and processes

Open end spinning

C057S315000

Reexamination Certificate

active

07140172

ABSTRACT:
A spinning machine drafting device includes a pressure roller loaded against a lower roller such that a fiber structure is conveyed between the roller pair. The pressure roller has an outer circumferential layer disposed around an inner circumferential layer of different low friction material as compared to the outer layer. The outer layer is thinner than the inner layer and disposed around the inner layer so as to slide relative to the inner layer upon rotation of the pressure roller in operation of the drafting device.

REFERENCES:
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patent: 1749393 (1930-03-01), Pflimlin
patent: 2948024 (1960-08-01), Swanson
patent: 5451197 (1995-09-01), Grant
patent: 6390962 (2002-05-01), Birkenmaier et al.
patent: 2001/0018823 (2001-09-01), Dinkelmann et al.
patent: 1888549 (1964-02-01), None
patent: 1685634 (1972-03-01), None
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patent: 42235 (1935-03-01), None
German Patent Office Search Report, May 2, 2003.
PCT Search Report, Apr. 29, 2004.

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