Methods for applying ink and washing-up after printing
AssigneeJames F. Price
InventorsJames F. Price, Robert L. Goodman, William A. Sullivan
Life of this patent
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Abstract
In a printing system where ink from an applicator roller is applied to a form roller in rotational contact with a plate cylinder, methods of washing up after printing in which methods the form roller is disengaged from the plate cylinder and a subtractive roller system removes a mixture of residual ink and ink solvent from the form roller and applicator roller. In preferred embodiments, the press drive is stopped during wash-up and the form roller is independently driven.
Claims18
A method of applying ink with an inking system during printing and removing ink during wash-up comprising:
- applying ink from a reservoir to a form roller from a first roller;
- applying ink from the form roller to a plate cylinder in rotating engagement with the form roller;
- removing excess ink from the form roller with a subtractive roller system and returning such excess ink to the reservoir;
- disengaging the plate cylinder and the form roller;
- applying ink solvent to the inking system;
- rotating the form roller, first roller and subtractive roller system;
- removing a mixture of ink solvent and residual ink from the form roller and depositing the mixture in a wash-up reservoir;
- and
- removing the wash-up reservoir containing the mixture of ink solvent and residual ink.
A method of applying ink with an inking system during wet offset printing and removing ink during wash-up comprising:
- applying ink from a reservoir to a form roller with an applicator roller;
- applying dampening fluid to the form roller with a dampening roller;
- applying ink form roller to a plate cylinder in rotating engagement with the form roller;
- removing excess ink from the form roller with a subtractive roller system and returning such excess ink to the reservoir;
- disengaging the form roller from the plate cylinder;
- applying ink solvent to the inking system;
- rotating the form roller, the applicator roller and the substractive roller;
- removing a mixture of ink solvent, dampening fluid, and residual ink from the form roller and depositing the mixture in a wash-up reservoir;
- and
- removing the wash-up reservoir containing the mixture of ink solvent, dampening fluid and residual ink.
A method of washing-up a press inking system having been used for printing in which ink has been applied to a plate cylinder by a form roller in rotating contact therewith and, in which ink has been applied to the form roller by an ink applicator roller, comprising
- disengaging the form roller from the plate cylinder;
- applying ink solvent to the applicator roller;
- rotating the form roller, and rotating the applicator roller and a subtractive roller in rotating contact with the form roller;
- removing a mixture of ink solvent and residual ink from the form roller with the subtractive roller;
- and
- collecting the removed mixture of ink solvent and residual ink in the wash-up severvoir.
Dependencies are inferred from the claim text.