Printing systems and methods using keyless inking and continuous dampening
AssigneeJames F. Price
InventorsJames Price, Robert Goodman, Max Dahlgren
Life of this patent
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Abstract
Keyless inking and dampening systems and methods are disclosed which employ application, subtractive and dampening roller systems to control the ink/dampening fluid film on the form roller. A clean-up roller removes residual ink from non-image areas on the printing plate.
Claims26
An inking and dampening system for a printing press having a rotating plate cylinder carrying at least one printing plate, comprising:
- a form roller rotationally contacting the plate cylinder for applying ink to the at least one printing plate;
- a clean-up roller rotationally contacting the plate cylinder for removing residual ink from non-image areas of the at least one printing plate after ink has been applied to the printing plate by the form roller;
- an applicator roller system for providing ink to the form roller;
- an ink subtractive roller system for removing ink from the form roller after printing;
- and
- a dampening roller rotationally contacting the form roller for applying dampening fluid to the form roller.
A method for inking and dampening one or more printing plates on a rotating plate cylinder comprising:
- supplying ink to a form roller with an applicator roller system in contact with the form roller;
- supplying dampening fluid to the form roller with a dampening roller system in contact with the form roller;
- transferring an ink and dampening solution to the rotating printing plate at a nip between the form roller and the printing plate;
- and
- removing excess ink and dampening fluid from the form roller at a nip between the form roller and a subtractive roller system.
A form roller inking and dampening system in which a resilient material covered form roller is sequentially rotationally contacted by
- an application roller system including a roller for applying additional ink to the form roller;
- a dampening roller system including a dampening roller for applying additional dampening fluid to the form roller;
- a plate cylinder to which ink and dampening fluid are applied by the form roller;
- and
- a subtractive roller system including a roller for removing ink and dampening fluid from the form roller.
Dependencies are inferred from the claim text.