Printing – Multicolor – Rotary machines
Patent
1982-09-27
1988-07-12
Fisher, J. Reed
Printing
Multicolor
Rotary machines
101180, 101182, 101247, 101DIG28, B41F 704, B41F 506, B41F 1340
Patent
active
047562471
ABSTRACT:
An apparatus and method converts an existing printing press to offset printing. An auxiliary frame and two auxiliary impression cylinders are mounted to the press and existing cylinders are adapted for offset printing. A new web path is defined to the cylinders, through an auxiliary cross brace member. The shafts of auxiliary cylinders are eccentrically mounted dead shafts. The cylinder surface is friction driven by the web. Bearers smooth the movement of the cylinders across the blanket slots. The auxiliary cylinders are maintained on impression by an incompressible fluid for uniform impression and thrown off rapidly by a pressurized gas.
REFERENCES:
patent: 1599199 (1926-09-01), Bayles
patent: 2490823 (1949-12-01), Manning
patent: 2569034 (1951-09-01), Auer
patent: 3177664 (1965-04-01), Konkge
patent: 3259060 (1966-07-01), Martin
patent: 4119031 (1978-10-01), Ottenhues
patent: 4301728 (1981-11-01), Jaffe et al.
Schwartz Michael A.
Yamagata Toshio
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