The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 1989
Filed:
Oct. 31, 1988
Arthur A Ruge, Stone Mountain, GA (US);
Donald A Kenagy, Atlanta, GA (US);
Ceradyne, Inc., Costa Mesa, CA (US);
Abstract
A dampening system roll which may be used in an offset printing press, is made of porous rebonded, fused silica, the pores of which are impregnated and sealed by a silicone resin. In a typical embodiment of the invention disclosed herein, a dampening system roll is fabricated by providing a 3 3/4 inch diameter 42 1/2 inch long fused silica cylinder infiltrated with a silicone resin and ground and polished to a 30 microinch Ra exterior smoothness. The ends of the cylinder are drilled out to provide a 1 3/4 inch diameter by 4 inch deep hollow core on each side which is adapted to receive a pair of shafts or end caps typically made of stainless steel or other low expansion metal alloy material and the end shafts or caps are bonded into the drilled ends of the fused silica cylinder for interfacing the printing press system. In an additional embodiment, the ends of the cylinder are core drilled to provide a pair of axial sockets each about 2 inches in diameter and about 2 inches deep. A threaded, low expansion metal alloy insert is then bonded to the interior of each such socket and mating threaded shafts are screwed into the inserts for connecting the cylinder to the remainder of the dampening system.