Printing – Rolling contact machines – Rotary
Patent
1999-03-31
2000-06-06
Asher, Kimberly
Printing
Rolling contact machines
Rotary
101181, 101183, B41F 516, B41F 518, B41F 1324
Patent
active
060705299
ABSTRACT:
A printing press includes a plate cylinder defining a nip with an impression cylinder. A drive shaft is drivingly connected to the impression cylinder to rotate the impression cylinder. A first gear is mounted on the drive shaft and is drivingly connected to the drive shaft. A differential mechanism is driven by the first gear. A second gear is mounted on the drive shaft for rotation relative to the drive shaft. The second gear is rotatably driven by the differential. A third gear in mesh with the second gear drivingly connects with the plate cylinder to rotate the plate cylinder. A correction drive motor, when energized, varies the speed at which the differential drives the second gear. The correction drive motor thus varies the speed of rotation of the plate cylinder relative to the impression cylinder.
REFERENCES:
patent: 3791294 (1974-02-01), Skelding et al.
patent: 3841216 (1974-10-01), Huffman
patent: 3863566 (1975-02-01), Schirrich et al.
patent: 4864927 (1989-09-01), Nieshaus
patent: 5127324 (1992-07-01), Palmatier et al.
patent: 5239924 (1993-08-01), Wallmann et al.
patent: 5570633 (1996-11-01), Schultz et al.
patent: 5706725 (1998-01-01), Kolbe et al.
Harmonic Drive Gearing, "HDUA Differential Transmissions", Catalog No. UA-04-1997, Published by Harmonic Drive Systems Inc., 1997.
Asher Kimberly
Stevens International, Inc.
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