System for transferring full and empty bobbins from and to a tex

Details System for transferring full and empty bobbins from and to a tex System for transferring full and empty bobbins from and to a tex

1988-03-25

1989-03-21

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Doffing or donning

57266, 57276, 57281, 242 355A, D01H 904, D01H 918

Patent

active

048132225

ABSTRACT:
A bobbin transfer system of a spinning frame (1), in which a series of trays (13) are carried on a pair of carrier rails (14, 15) driven to repeat a back-and-forth reciprocation. Hooking members (23) are arranged along the carrier rails (14, 15), which allow the trays (13) to pass thereover during the forward displacement of the carrier rail (14, 15) but inhibit the backward displacement of the trays (13) by the action of hooks (23a) formed on the hooking member (23) at a distance from each other corresponding to N times the spindle pitch wherein N satisfies the equation .DELTA.A.gtoreq..DELTA.D.times.N (wherein .DELTA.D stands for a manufacturing tolerance of a diameter of the tray 13 and .DELTA.A stands for an allowance for a grip distance of a bobbin catcher in an auto-doffer) and p stands for a spindle pitch. Accordingly, the trays (13) are transferred intermittently as the carrier rails (14, 15) reciprocate at a stroke larger than the spindle pitch.

REFERENCES:
patent: 3905184 (1975-09-01), Takai et al.
patent: 4014161 (1977-03-01), Cox
patent: 4338778 (1982-07-01), Suzuki et al.
patent: 4586668 (1986-05-01), Mori
patent: 4676061 (1987-06-01), Yamamoto

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