Support for pressure roll for a paper roll winder

B - Operations – Transporting – 65 – H

Patent

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Details

B65H 75/02 (2006.01) B65H 27/00 (2006.01)

Patent

CA 2149570

A roll for selective use as either a support drum or as a rider roll in a winder for winding a traveling paper web into a relatively large diameter wound web roll has a body with an outer, elastomeric cover. The elastomeric cover includes a pattern, open to the surface, arranged such that the percent of volumetric void for a unit of cover volume is such that the effective hardness of the cover ranges between about 30 Shore "A" to about 55 Shore "A" where the roll is a support drum, and between about 40 Shore "A" to about 65 Shore "A" when the roll is a rider roll. In addition, the elastomeric material has an absolute hardness of about 65 Shore "A", or less, for a support drum, and about 75 Shore "A", or less, for a rider roll, and a Poisson's ratio of between about 0.47 to about 0.499.

Rouleau, dont le corps possède un revêtement extérieur d'élastomère, pour utilisation sélective comme tambour de support ou rouleau presseur dans une bobineuse, afin d'enrouler une bande continue de papier mobile sur un rouleau de diamètre relativement grand. Le revêtement d'élastomère comprend un motif ouvert à la surface et disposé de façon à ce que le pourcentage en vide volumétrique pour une unité de volume de revêtement soit tel que la dureté réelle du revêtement oscille entre environ 30 et 55 Shore « A » lorsque le rouleau est un tambour de support, et entre environ 40 et 65 Shore « A » lorsque le rouleau est un rouleau presseur. Par ailleurs, le matériau d'élastomère démontre une dureté absolue d'environ 65 Shore « A » ou moins pour un tambour de support et d'environ 75 Shore « A » ou moins pour un rouleau presseur, ainsi qu'un rapport de Poisson se situant entre environ 0,47 et 0,499.

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