Howa Machinery, Ltd.

Nippo Corporation

Hideyuki Goto

Yutaka Tanaka

Yasushi Iwama

Hiroshi Enomoto

A spinning ring structure (10) for twisting a fleece into a yarn and taking up the yarn on a bobbin (82) comprises a stationary ring (20) fixedly mounted on a ring rail (74), a rotary ring (30) disposed for rotation about its own axis inside the stationary ring (20) coaxially therewith so as to surround the bobbin (82) disposed with the stationary ring (30). A traveler (50) is put on the rotary ring (30) so as to revolve along the circumference of the rotary ring, and a brake ring (60) is mounted on the rotary ring (30) and provided with a plurality of radial vanes (68) to which air applies resistance against the turning of the brake ring. The brake ring (60) is provided with an air pressure evading wall (64) for avoiding the influence of a pressure generated by whirling air currents produced by the rotating cop, on the brake ring (60) to prevent retardation of the variation of the rotational speed of the rotary ring according to the variation of the effective circumferential speed of the cop built on the bobbin during a cop building operation so that a balloon formed by the yarn will not expand and will not collapse.

Spinning ring structure with an aerodynamic brake member

A spinning ring structure for use on a spinning frame comprises a stationary ring fixedly held in place, a rotary ring fitted in the stationary ring coaxially with the stationary ring so as to rotate about its center axis and provided with an annular flange at its upper end, a traveler put on the flange of the rotary ring for traveling along the flange to guide a yarn to a bobbin disposed coaxially with the rotary ring. Openings are formed through a neck portion of the rotary ring, whereby flies produced during the spinning operation by friction between the yarn and the traveler are discharged outside the spinning ring structure through the openings due to centrifugal force.

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Ama-gun, Japan

Hideyuki Goto