The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 1976
Filed:
Dec. 04, 1974
Burkhardt Wirz, Munich, DT;
Peter Decker, Munich, DT;
Roland Offsetmaschinenfabrik Faber & Schleicher AG, both of, DT;
Grapho Metronic GmbH & Co., BOTH OF, DT;
Abstract
An inking system for applying ink to a printing plate which includes a fountain roller and a series of ink feed rollers with at least one vibrated roller or drum. Means are provided for automatically regulating the temperature of the fountain roller thereby to maintain constant the amount of ink fed over a long press run for maintenance of a predetermined full tone density. Means are also provided for automatically regulating the temperature of the vibrated roller thereby to maintain constant the printing contrast in the half tone portions of the plate. The temperature regulating means includes both a source of heat and a source of cold, making it possible to either warm or cool the rollers thereby permitting automatic operation over a wide range of conditions including a wide variation in the ambient temperature. In the preferred embodiment the temperature of the rollers is maintained by circulating a fluid such as water through the rollers from a reservoir of fluid at a controlled rate and temperature. Means are additionally provided for applying to the rollers a 'shot' of fluid which is selectively either hot or cold to bring the rollers rapidly to desired temperature prior to turning on the automatic regulating means. In one embodiment of the invention the temperatures of the fountain roller and vibrated roller are independently regulated by supplying them with fluid from separate reservoirs having provision for separate temperature regulation.