Support or pressure roll for a paper roll winder
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United States of America Patent
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Sep 10, 1996
Grant Date -
N/A
app pub date -
May 19, 1994
filing date -
May 19, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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