Printing – Printing members – Plate mountings
Patent
1986-05-01
1988-05-17
Pearson, Charles A.
Printing
Printing members
Plate mountings
1014151, B41F 2706, B41F 2712
Patent
active
047442972
ABSTRACT:
Apparatus for mounting a flexible printing plate comprises a printing cylinder having a surface upon which the printing plate is mountable, and a connection for applying subatmospheric pressure inside the cylinder. A plurality of valves selectively apply the subatmospheric pressure to the surface from inside the cylinder. These valves have depressable actuating members protrudable above the cylinder surface. Those actuating members contacted by the printing plate when applied to the cylinder surface are depressed thereby to effect application of subatmospheric pressure to beneath the printing plate to draw the plate against the cylinder. Preferably, grooves are provided in the cylinder surface for distribution of the subatmospheric pressure beneath the plate. Advantageously, the printing plate may have a thin, highly flexible and deformable fringe along its trailing edge to seal the surface grooves, at that location. This mounting arrangement facilitates quick changing of printing plates during printing operations.
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Harrison Edward H.
Harrison John R.
Parr Dennis J.
Sardella Louis M.
West John B.
Bartlett Edward D. C.
Dent Boyce C.
Pearson Charles A.
The Ward Machinery Company
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