Valve arrangement for spray dampening units on printing machines
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United States of America Patent
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Issued Date -
Nov 18, 2004
app pub date -
May 17, 2004
filing date -
May 17, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A valve arrangement for spray dampening units on printing machines with a feeder system to supply the valve arrangement with pressurized dampening agent and spray nozzles downstream of the valve arrangement, includes two valves disposed behind each other with staggered opening times. In a first embodiment, the opening times are staggered so that both valves are only open at the same time for a small period of time. This means shorter effective opening times can be achieved than with individual valves. In a second embodiment there is an elastic buffer element between the two valves, and the opening times are completely staggered so that there are no common opening times. When the upstream valve is opened the buffer element generates an additional uptake of dampening agent, which is ejected by the buffer element when the first valve is closed and the downstream valve is opened.
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