Printing – Planographic – Dampeners
Patent
1988-10-31
1989-12-19
Burr, Edgar S.
Printing
Planographic
Dampeners
29132, 29458, 294695, 295272, 156256, 156257, 156294, 427387, 428446, 428447, 428906, B41L 2304, B41L 2502
Patent
active
048875287
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.
REFERENCES:
patent: 4167351 (1979-09-01), Bindin
patent: 4230475 (1980-10-01), Dunk
patent: 4396445 (1983-08-01), Sasaki et al.
patent: 4399598 (1983-08-01), Page et al.
patent: 4429003 (1984-01-01), Fredriksson et al.
patent: 4542073 (1985-09-01), Tanaka et al.
patent: 4697325 (1987-10-01), Kamigaito et al.
patent: 4759284 (1988-07-01), Haggard et al.
patent: 4777087 (1988-10-01), Heeks et al.
patent: 4794680 (1989-01-01), Meyerhoff et al.
Kenagy Donald A.
Ruge Arthur A.
Burr Edgar S.
Ceradyne, Inc.
Cohen Moshe I.
Tachner Leonard
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