Soft doctoring cup
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United States of America Patent
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Nov 10, 1998
Grant Date -
N/A
app pub date -
Jul 12, 1996
filing date -
Jul 12, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A doctoring cup particularly suited for inking non-flat plates includes a plate contacting edge with an 'Ease of Flex' parameter greater than about 0.020 lb.sup.-1. Ease of Flex is defined as 1/(Mt.sup.2), where t is the thickness of the plate contacting edge and M is the flexural modulus of the material from which the cup wall defining the edge is formed. By non-flat plates is meant plates out of flat by greater than 0.0002 inches/inch. The doctoring cup can be used to ink both flat and non-flat printing plates using a doctoring pressure of less than about 300 psi.
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