Temperature compensated doctor blade
AssigneeXerox Corporation
InventorRobert Albert Carter
Life of this patent
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Abstract
A temperature compensated doctor blade system is disclosed for controlling the amount of liquid on a substrate. Variation in temperature is found to cause wide variation in liquid viscosity which affects doctor blade pressure requirements. An expandable chamber containing a temperature responsive fluid is used to control the pressure applied to a flexible doctor blade.
Claims6
Apparatus in which a blade is urged against a surface for controlling the amount of liquid on said surface, comprising temperature compensating means adapted to increase pressure at increased operating temperatures and decrease pressure at decreased operating temperatures which comprise a fixed sealed expandable chamber containing a temperature responsive fluid and linking means responsive to said increased pressure and said decreased pressure of said expandable chamber for urging said blade into contact with said surface.
Dependencies are inferred from the claim text.