Method and device for longitudinal drawing of a film web

Details Method and device for longitudinal drawing of a film web Method and device for longitudinal drawing of a film web

2005-01-17

2009-10-06

Vanatta, Amy B (Department: 3765)

Textiles: cloth finishing

Expanding device for textile webs

C026S099000, C026S051000, C264S288400

Reexamination Certificate

active

07596839

ABSTRACT:
The invention relates to a device for drawing a film web, made from a thermoplastic plastic, comprising at least one driven roller (2), driven at a speed V1and at least one second driven roller (3), driven at a speed V2,where V1<V2. The rollers (2, 3) are serially arranged such that a drawing gap (4) is embodied between the two rollers (2, 3). A width-maintaining device is arranged in the drawing gap (4), which mechanically grips both edges of the film web such that the width of the film web is essentially maintained during the longitudinal drawing in the drawing gap (4). The invention further relates to a method for the longitudinal drawing of films which are drawn by means of said device.

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