Method of making a plate cylinder for a web printing press

Details Method of making a plate cylinder for a web printing press Method of making a plate cylinder for a web printing press

1978-05-08

1980-09-23

Goolkasian, John T.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

291484D, 29523, 29524, 101378, 101382R, 101383, 156150, 156294, 1563031, 1563042, 156330, 264249, 264267, 403297, 428 36, 428174, 428188, 428416, 428457, 428908, B32B 3120, B21D 3904, B29C 1702, B41F 2700

Patent

active

042240956

ABSTRACT:
A method of making a plate cylinder for a web printing press in which a hollow cylinder with a conical interior is formed of ductile steel. Two nickel printing plates are formed to shape so that they will fit virtually exactly around the cylinder without joins between them being readily apparent. A cylindrical mould having two semi-cylindrical mould halves is formed with its inner diameter equal to the outer diameter of the plate cylinder being produced. One mould half is placed with its semi-cylindrical inner surface facing upwards and a printing plate is placed inside. Then the hollow cylinder coated with epoxy resin is placed on this plate, and the other printing plate is placed on the cylinder. The second mould half is secured to the first half, and a conical core is forced into the cylinder to expand it radially so that the plates are held under pressure against the mould surface. Then the mould is heated and the resin allowed to set under conditions of temperature and pressure. Finally the plate cylinder is taken from the mould and the adhered printing plates are chromium plated.

REFERENCES:
patent: 3434194 (1969-03-01), Whittaker et al.
patent: 3682094 (1972-08-01), Greis
patent: 4092193 (1978-05-01), Brooks
patent: 4113006 (1978-09-01), Clapp

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