Printing cylinder of a rotary printing press and a method for us

Details Printing cylinder of a rotary printing press and a method for us Printing cylinder of a rotary printing press and a method for us

1992-09-24

1994-09-13

Fisher, J. Reed

Printing

Rolling contact machines

Rotary

101375, 101483, 492 7, B41F 500, B41F 1310

Patent

active

053458648

ABSTRACT:
A printing cylinder for a rotary printing press has a support, which is fixed against relative rotation, and a jacket rotatable around the latter, which is supported by a row of support elements, disposed axially side-by-side and individually controllable and radially displaceable at least in part in order to attain an even printing pressure across the width of the cylinder while avoiding any bending of the jacket. The jacket is constructed of three coaxial tubes, an interior tube, a filler body and a printing forme support, at least two of which, or even all three, in the rest state, are separated by a small gap so that they can be easily pulled off each other and exchanged in order to change the printing press over to another print pattern or another diameter or register. By charging the sealed interior chamber with pressure, for example with the use of the fluid pressure required for the support elements, the gap(s) are closed, so that the individual jacket parts have a press fit with each other and rotate together. By reducing the interior pressure to lower pressures, for example atmospheric pressure or a partial vacuum, it is possible to open the gap(s) again selectively.

REFERENCES:
patent: 3166013 (1965-01-01), Wyllie et al.
patent: 3253323 (1966-05-01), Saueressig et al.
patent: 3802044 (1974-04-01), Spillmann et al.
patent: 3885283 (1975-05-01), Biondetti
patent: 5111566 (1992-05-01), Schnyder et al.

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