US 4,198,739 A · Printing roller with polymeric coner and method of making the same

Abstract

A printing roller and cover therefor and a novel method for their manufacture are provided. A thin tube of heat shrinkable polymeric material is bonded to a metal or a rubber covered metal core. The thin tube is coated on its inner surface with a thermoplastic adhesive and the solvents in the adhesive are evaporated to produce a tack-free adhesive coating. The core is placed within the tube and the tube is heat shrunk around the core at a temperature sufficient to melt the adhesive, thus bonding the tube to the core. Preferably, the core is primed with an adhesive which will cross-link with the adhesive applied to the tube. The thermoplastic tube covering the core is preferably a long-lasting polymer substantially inert to chemical attack, such as a fluorinated hydrocarbon or polyolefin.

Claims14

Dependent claims

A method for bonding a thin tube of heat shrinkable material to a core comprising the steps of:

(a) coating said tube on its inner surface with a first thermoplastic adhesive which does not contain a curing agent in a solvent solution which renders said first adhesive tacky;
(b) evaporating said solvent from said first adhesive solution to produce a tack-free adhesive, capable of being stored for several months without substantial loss of adhesive qualities;
(c) coating said core with a second adhesive containing a curing agent in an effective amount to cure both adhesives in a cross-linking chemical reaction;
(d) placing said tube having its inner surface coated with said tack-free adhesive over said core;
and
(e) heat shrinking said tube onto said core at a temperature sufficient to melt said adhesives to form an adhesive system whereby said curing agent migrates into said first adhesive and cures both adhesives in a cross-linking chemical reaction to bond said tube to said core.

3 more elements

A roller comprising a thin tube of fluorocarbon polymer bonded to a core by a method comprising the steps of:

(a) coating said tube on its inner surface with a first thermoplastic adhesive which does not contain a curing agent in a solvent solution which renders said first adhesive tacky;
(b) evaporating said solvent from said first adhesive solution to produce a tack-free adhesive capable of being stored for several months without substantial loss of adhesive qualities;
(c) coating said core with a second adhesive containing a curing agent in an effective amount to cure both adhesives in a cross-linking chemical reaction;
(d) placing said tube having its inner surface coated with said tack-free adhesive over said core;
and
(e) heat shrinking said tube onto said core at a temperature sufficient to melt said adhesives to form an adhesive system whereby said curing agent migrates into said first adhesive and cures both adhesives in a cross-linking chemical reaction to bond said tube to said core.

3 more elements

Dependencies are inferred from the claim text.

Printing roller with polymeric coner and method of making the same

Life of this patent

Printing roller with polymeric coner and method of making the same

Life of this patent

Abstract

Claims14