Wire filament, particularly for reinforcing rubber or...

D - Textiles – Paper – 07 – B

Patent

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Details

D07B 1/06 (2006.01) D07B 3/00 (2006.01) D07B 5/12 (2006.01)

Patent

CA 2232150

The proposal is for a wire filament for reinforcing rubber or plastic items, especially pneumatic tyres, which is spiral in shape and exhibits no residual elastic torsional stresses. A wire filament (8) of the invention is produced by twisting drawn straight wire filaments (2) in the plastic deformation region followed by reversal, two wire filaments being put together and secured at the latest before reversal. Advantageously, at least two wire filaments (2) are brought together by means of a perforated plate (30), twisted around each other in a false twister (20) and plastically deformed and then reversed in a further false twister (40).

L'invention concerne un filament métallique servant à renforcer des articles en caoutchouc ou en plastique, notamment des pneus, qui est spiroïdal et ne présente pas de tensions élastiques résiduelles de torsion. On obtient un filament métallique (8) de ce type, par torsion de filaments métalliques (2) droits étirés, dans la zone de déformation plastique, puis par torsion en sens inverse, au moins deux filaments métalliques étant rapprochés et réunis au plus tard avant la torsion en sens inverse. Il est avantageux de rapprocher au moins deux filaments métalliques (2) à l'aide d'un disque perforé (30), de les enrouler l'un autour de l'autre dans un dispositif de fausse torsion (20), de les soumettre à une déformation plastique avant de les soumettre à une torsion en sens inverse dans un autre dispositif de fausse torsion (40).

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