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US 4,137,614 AGranted
Preparation of a warp beam wound with flexible tapes
AssigneeDu Pont Canada Inc.
InventorMichael J. Wolstencroft
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Abstract
An improved process is disclosed for preparing a warp beam wound with tapes slit from at least two webs of superimposed flexible film at least 1 m wide, comprising feeding the slit superimposed tapes through nip rolls, separating the tapes at the nip and winding the tapes onto a warp beam.
Claims10
A process for preparing a warp beam wound with a plurality of tapes slit from at least two substantially continuous flat webs of flexible film superimposed upon each other, each web being at least 1 meter wide, said process comprising the steps of
- (a) removing wrinkles from said webs of flexible film
- (b) superimposing said webs
- (c) slitting the superimposed webs longitudinally into a plurality of tapes
- (d) feeding the superimposed tapes so formed through a pair of undriven nip rolls
- (e) separating the superimposed tapes at the nip of said undriven nip rolls;
- each separated tape slit from one of the superimposed webs being arranged in the same plane with and in proximity to companion tapes slit from the other webs and the outer separation angle of the slit tapes being from 8.degree. to 15.degree.
- (f) winding the separated tapes onto a driven warp beam
- (g) applying tension to each web sufficient to give all of the tapes substantially the same tension at the warp beam.
5 more elements
Dependencies are inferred from the claim text.