Patent ID: 7395758

Claim:
An ink fountain device comprising: a fountain roller which is rotatably supported by an eccentric bearing; a blade which is arranged close to said fountain roller and a distal end of which forms a clearance, with respect to an outer surface of said fountain roller, where ink is to be supplied; a pair of ink dams which are arranged to be substantially perpendicular to said blade and oppose each other in an axial direction of said fountain roller, and are supported to be movable toward and away from said outer surface of said fountain roller; first biasing means for biasing said ink dams to move toward said outer surface of said fountain roller; and fountain roller moving (displacing) means for pivoting said eccentric bearing so as to move said fountain roller, wherein said pair of ink dams are moved by a biasing force of said first biasing means in a direction substantially perpendicular to a line that connects an axis of said fountain roller and a pivot center of said eccentric bearing.