Abstract: An enhanced system for cleaning a component, such as a blanket, of a printing press in one embodiment provides circulation of wash mixture around a path in such a way that pressure of fluid in the supply line can never exceed ambient pressure. This may be achieved, for example, by utilizing a pump disposed in the return line (rather than in the supply line). Another embodiment provides a spray arrangement for spraying wash mixture onto the component to be cleaned. The spray arrangement has nozzles that are in communication with a feed region (such as the interior of a spray bar) and an isolation valve arrangement for in an open state permitting and in a closed state preventing fluid pressure transmission from the rest of the system to the feed region. A pressure arrangement modifies fluid pressure in the feed region when the isolation valve arrangement is in a closed state.
Type:
Grant
Filed:
July 25, 1989
Date of Patent:
April 9, 1991
Assignee:
Precision Engineered Systems Inc.
Inventors:
Edward M. Goldberg, Daniel Bettencourt, Jr., James C. Tosti, Jr., Norman S. Jones
Abstract: The present invention provides an automatic blanket wash system that recirculates a separable mix of water and solvent. The mix is selectively applied to the blanket cylinders by closing a pressure valve in the recirculation system return line and selectively opening valves to spray bars at the blankets. The pressure valve closing causes a pressure build up in the system for the spraying of the mix onto the blankets.
Type:
Grant
Filed:
October 31, 1986
Date of Patent:
August 18, 1987
Assignee:
Precision Engineered Systems Inc.
Inventors:
Raymond J. Allain, Henry P. Bolduc, Jr., Thomas R. Patterson, Timothy J. Ingram