Textiles: spinning – twisting – and twining – Apparatus and processes – Piecing up
Patent
1995-08-09
1997-04-15
Stryjewski, William
Textiles: spinning, twisting, and twining
Apparatus and processes
Piecing up
57 3, 57 6, 57 12, 57 19, 57 22, 57 86, 57 87, 57279, 57280, 57328, D01H 1100, D01H 1304
Patent
active
056198485
ABSTRACT:
A method and apparatus for automatically removing a slub from spun filament yarn and a sliver or roving of staple fibers. The sliver or roving of staple fibers are fed through a drafting apparatus to prepare a continuous bundle of staple fibers. The filament yarn is pretensioned such that a texture is temporarily substantially removed. The continuous bundle of staple fibers and the filament yarn are combined downstream of the drafting apparatus. The combined continuous bundle and the filament yarn are fed into a spinner. The spun filament yarn and staple fibers are monitored to detect imperfections of a predetermined magnitude. A first signal is generated upon detection of an imperfection of the predetermined magnitude. The feeding of the staple fibers is stopped in response to the first signal. The core yarn is clamped at a predetermined position in response to the first signal. The core yarn is cut downstream of the predetermined position and upstream of the combining position in response to the first signal. The stopping of the feeding, the clamping of core yarn and the cutting of the core yarn all take place substantially simultaneously. Upon the arrival of a splicer, the clamping of the core yarn is released, the tension on the core yarn is released and a downstream feeding force is applied to the untensioned core yarn. The splicer removes a predetermined amount of the spun filament yarn and staple fibers from both upstream and downstream of the position of the imperfection, splices the yarn back together and releases the yarn to permit continued manufacture of composite spun core yarn, all without requiring any manual assistance.
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Costales Manual
Proctor Charles W.
Yukob Mark J.
Prospin Industries, Inc.
Stryjewski William
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