초록 ▼

A multi-layer roll having a thin fluoropolymer top coat on an elastomeric base layer bonded to a substantially rigid insert is provided. The top coat is formed by placing a thin non-self supporting fluoropolymer sleeve about the insert, or wrapping extruded fluoropolymer film about the insert which

A multi-layer roll having a thin fluoropolymer top coat on an elastomeric base layer bonded to a substantially rigid insert is provided. The top coat is formed by placing a thin non-self supporting fluoropolymer sleeve about the insert, or wrapping extruded fluoropolymer film about the insert which is placed in a mold sleeve and positioned in a book mold to hold the membrane in place. Liquid or flowable elastomer is injected into the space between the insert and flexible top coat at a point downstream of where the top layer is held in position between mold elements to prevent wrinkling. The mold is then heated to cure the elastomer.

대표청구항 ▼

1. An apparatus for fabricating a multi-layer roll with a fluoropolymer top coat formed from a fluoropolymer membrane on an elastomeric base layer bonded to a substantially rigid cylindrical core, comprising:a mold having a cylindrical mold cavity having an inlet and an outlet for receiving a cylind

1. An apparatus for fabricating a multi-layer roll with a fluoropolymer top coat formed from a fluoropolymer membrane on an elastomeric base layer bonded to a substantially rigid cylindrical core, comprising:a mold having a cylindrical mold cavity having an inlet and an outlet for receiving a cylindrical mold sleeve; a cylindrical mold sleeve and spider elements for mounting on the ends of the core and extending beyond the ends of the mold sleeve to form a roll assembly and when inserted into the mold sleeve adapted to seat within the cylindrical cavity of the mold; the spider elements mounted on at least one end of the core for directing injected flowable elastomer material into the roll assembly between the core and top coat membrane positioned in the mold sleeve; the cylindrical mold cavity including a region for engaging the top coat membrane between the spider elements and the mold when the mold sleeve is placed in the mold; a source of elastomeric material for injection into the roll assembly; and means for heating the mold to cure the elastomeric material.