Apparatus for guiding, treating, or conveying at least one yarn

Heating – Advancing structure flexing – looping or coiling sheet – web...

Reexamination Certificate

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Details

C242S474400

Reexamination Certificate

active

10997839

ABSTRACT:
An apparatus for guiding, treating, or advancing at least one yarn (1), comprising a delivery roll (2) and a companion roll (3) cooperating with the delivery roll so that the yarn repeatedly loops the delivery roll (2) and the companion roll (3). The delivery roll and the companion roll are driven by associated electric motors (7, 8), which are controlled via control lines (9) at a desired frequency by a controller (10). To enable an equalization of the circumferential speeds of the delivery roll (2) and the companion roll (3), the electric motor of the companion roll is an asynchronous motor that is controlled by the desired frequency and has a motor slip.

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