Method and means for controlling the drafting of sliver in a dra

Details Method and means for controlling the drafting of sliver in a dra Method and means for controlling the drafting of sliver in a dra

1987-06-04

1989-03-14

MacDonald, Allen

Boots, shoes, and leggings

19239, 19300, G01B 1304, D01H 552

Patent

active

048129933

ABSTRACT:
A method and means for controlling the drafting of sliver in a draw frame using sensing means with the aid of which variations in mass of the sliver can be sensed and a resulting signal applied to drafting means located after the sensing means in the direction of travel of the sliver and which changes the draft to compensate for sensed variations in the sliver mass. The sensing means and the drafting means are connected to controlling means which include a storage device. A sensed variation in sliver mass is temporarily stored by the storage device for the duration of a delay time which takes into consideration the traveling time of the sliver form the sensing means to the drafting means. The delay time is shortened by a correction time as a function of the magnitude and/or rate of the sensed variation in sliver mass. This has the effect that variations in mass of the sliver can be compensated almost completely by the drafting device.

REFERENCES:
patent: 4267620 (1981-05-01), Allen, Jr.
patent: 4302968 (1981-12-01), Moser
patent: 4646387 (1987-03-01), Oswald et al.

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