Printing press blanket cylinder assembly and method of making sa

Details Printing press blanket cylinder assembly and method of making sa Printing press blanket cylinder assembly and method of making sa

1989-12-18

1991-08-13

Crowder, Clifford D.

Printing

Printing members

Blanks and processes

101217, 1013891, 101483, 101494, B41F 3004, B41F 2702, B41F 500

Patent

active

050386808

ABSTRACT:
A pair of coacting blanket cylinder assemblies (13', 14') employed in a high speed printing press are each provided with a resilient blanket (13, 14) wrapped around a cylinder (15, 16) and held in place by magnets (35, 26) carried by the cylinders (15, 16). The magnets (35, 36) attract and hold magnetic portions (31, 32, 33, 34) of a metal backing plate adjacent the ends of the blankets (13A, 13B, 14A, 14B) which are separated by a gap (43, 44) of a size selected according to the thickness of blanket and natural frequency of the cylinder (15, 16) to obtain a residual response for gap disturbances that is less than a maximum threshold response at which streaking occurs during printing operation at high speed.

REFERENCES:
patent: 2774302 (1956-12-01), Stromme
patent: 3395638 (1968-08-01), Kirkus
patent: 3496866 (1970-02-01), Nystrand
patent: 3670646 (1972-06-01), Welch, Jr.
patent: 3765329 (1973-10-01), Kirkpatrick et al.
patent: 4125073 (1978-11-01), Bain
patent: 4403549 (1983-09-01), Matuschke
patent: 4466349 (1984-08-01), Bartlett
patent: 4577560 (1986-03-01), Banike
patent: 4648318 (1987-03-01), Fischer
patent: 4742769 (1988-05-01), Zeller
patent: 4817527 (1989-04-01), Wouch et al.
patent: 4823697 (1989-04-01), Randazzo

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