Device for pre-emulsifying of ink emulsion in offset printing ap

Details Device for pre-emulsifying of ink emulsion in offset printing ap Device for pre-emulsifying of ink emulsion in offset printing ap

1986-07-17

1987-11-03

Fisher, J. Reed

Printing

Planographic

Rotary machines

101148, B41F 702, B41F 724

Patent

active

047036907

ABSTRACT:
In an offset printing apparatus one arranges in the "channel" of the printing plate cylinder a further segment for improving the emulsion and for reducing the time-interval between "stripping" and "scumming," which is provided with a plane, water-conducting and ink-repellent plate, preferably of polished chromium steel. In the course of the rotation of the printing plate cylinder, this segment, designated preemulsifying segment, is wetted by the dampening form-roller of the dampening unit with water which is emulsified by contact with the subsequently arranged ink form-rollers, before same come in contact with the printing plate of the printing plate segment.
As a result of the arranging of the emulsifying segment, the time-interval between "stripping" and "scumming" can be quadrupled and the amount of water required can be reduced.

REFERENCES:
patent: 3645202 (1972-02-01), Cake
patent: 4211167 (1980-07-01), Corse
patent: 4407197 (1983-10-01), Jeschke

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