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US 5,206,992 AGranted
Compressible roller
AssigneeAmerican Roller Company
InventorsJames R. Carlson, Gerald J. Landl
Life of this patent
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Abstract
A compressible roller especially useful in high speed printing systems consists of a rigid core and a compressible cover. The cover consists of a first relatively thick layer of compressible foam which is bonded to the core, an elastomeric seal bonded to the foam; and an outer print layer of a compatible elastomer bonded to the seal. A method of preparing the roller also is disclosed.
Claims4
A method of making a compressible roller comprises selecting a rigid roller core;
- gluing with an adhesive a foam layer about the core to form a foam and core assembly;
- wrapping a tape about the core and foam assembly to compress the foam and curing the adhesive to bond the core and the foam layer together;
- removing tape and grinding the foam layer to the desired dimensions;
- forming an elastomeric seal on the outer surface of the foam layer to prevent any gas contained therein from exiting;
- applying a coating of a compatible elastomer over the seal while rotating the core and foam assembly to obtain an outer coating of a desired thickness;
- curing the outer coating;
- and, then grinding the outer coating to obtain an outer layer of a desired smoothness.
4 more elements
A method of preparing a compressible printing roller, said method comprising:
- (a) gluing a layer of compressible foam to a rigid printing roller core with an adhesive;
- (b) curing the adhesive;
- (c) grinding the foam layer to a desired roundness and smoothness;
- (d) sealing the outer surface of the foam layer with a room temperature vulcanizing urethane which enters into exposed pores of the foam;
- (e) curing the urethane to form a seal which is mechanically bonded to and which prevents gas from leaving the compressible foam layer;
- (f) applying a coating of a room temperature vulcanizing urethane which is compatible with and forms a chemical bond with the seal over the seal until an outer coating of a desired thickness is obtained;
- (g) allowing the outer coating to completely cure;
- and,
- (h) grinding away the excess thickness of the outer coating to obtain a print layer of desired properties.
6 more elements
Dependencies are inferred from the claim text.