Dampening water feeding method and printing machine

Details Dampening water feeding method and printing machine Dampening water feeding method and printing machine

2006-06-27

2006-06-27

Hirshfeld, Andrew H. (Department: 2854)

Printing

Planographic

Dampeners

C101S451000, C101S484000

Reexamination Certificate

active

07066087

ABSTRACT:
Densities of detecting patches also called control scales printed on prints in a first print job are used to control the feed rate of dampening water in a second print job following the first print job. Specifically, densities of detecting patches on the prints obtained from the first print job are measured, and a feed rate of dampening water is calculated from the densities of the detecting patches. A base feed rate of dampening water is calculated based on the feed rate calculated and a humidity and temperature occurring when the first print job is performed. A proper feed rate of dampening water is calculated based on the base feed rate and a humidity and temperature occurring when the second print job is performed.

REFERENCES:
patent: 5341734 (1994-08-01), Jeschke et al.
patent: 5592880 (1997-01-01), Rodi
patent: 6138563 (2000-10-01), Sone et al.
patent: 6601512 (2003-08-01), Yamamoto et al.
patent: 6796227 (2004-09-01), Miller
patent: 2003/0047093 (2003-03-01), Callahan et al.
patent: 1 245 388 (2002-10-01), None

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