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US 4,791,275 AGranted
High temperature compliant roll particularly adapted for xerography
AssigneeImi-Tech Corporation
InventorsRaymond Lee, Gregory A. Ferro, John Evan
Life of this patent
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Abstract
A heated roll suitable for use as a fuser roll in a xerographic processes is formed from a sheet of flexible, resilient, polyimide foam. An electrical heating circuit is adhesively secured thereto. The circuit is preferably disposed between a pair of polyimide film sheets which, in turn, are secured to the foam.
Claims5
A roll for heating a surface bought in contact therewith comprising:
- (a) a cylindrical layer of flexible, resilient polyimide foam capable of withstanding, on a continuous basis, temperatures within the range of 400.degree. F. to 600.degree. F.;
- (b) electrical heating means comprised of a flexible electric circuit encapsulated between two sheets of a high temperature resistant polyimide film secured together by a high temperature adhesive, said electrical heating means being secured to the exterior of the foam by a high temperature adhesive, both said adhesives being capable of operating at temperatures up to at least 450.degree. F.;
- and
- (c) a relatively rigid cylinder over which the foam is concentrically disposed for support and rotation;
- whereby the heating means is adapted to be brought into compliant contact with a surface to be heated by rotation of the roll;
- said roll being capable of reaching surface temperatures within the range of 400.degree. F. to 600.degree. F. on a continuous operating basis.
3 more elements
Dependencies are inferred from the claim text.