Tension control apparatus for weft threads

Details Tension control apparatus for weft threads Tension control apparatus for weft threads

1996-09-18

1998-03-10

Falik, Andy

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

139194, 139430, 139450, D03D 4738, D03D 4734, D03D 5134

Patent

active

057250294

ABSTRACT:
An apparatus for reducing the load on a weft thread being inserted into a loom shed reduces the necessary number of weft thread monitors or stop motion devices functioning as thread tension sensors while still ensuring a reliable tension measurement, especially in a gripper loom in which a plurality of different weft thread types are to be respectively inserted into the loom shed using a weft thread selector and insertion arrangement. A single first thread tension sensor (14) is provided to be common to all of the weft thread types (6) that are to be inserted. The sensor (14) is arranged in a first arrangement plane at a location downstream of the weft thread selector and change arrangement (8). A single second thread tension sensor (19) is arranged in a second arrangement plane at a location between the first thread tension sensor (14) and the weft thread selector and change arrangement (8). Thus, only two thread tension sensors are used, in series, for the total of all weft thread types that are to be inserted into the loom shed, and therefore all the tension values are directly comparable with one another.

REFERENCES:
patent: 5477892 (1995-12-01), Corain et al.
patent: 5544679 (1996-08-01), Tacq
Article by b. Wulfhorst and F. Lehnert "Reduzierung der Schussfaden-belastung mit Hilfe einer neuentwickelten geregelten Schussfadenbremse" (Reducing the Weft Thread Loading by Means of a Newly Developed COntrolled Weft Thread Brake), Special Publication Print by Textil Praxis International (1991) 12, pp. 1291 to 1298. No translation.

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