Patent ID: 8256371

Claim:
An application liquid supply apparatus for supplying an application liquid to an application roller which abuts against a medium while rotating so as to apply the application liquid to the medium, the application liquid supply apparatus comprising: a space forming enclosure configured to abut against an outer circumferential surface of the application roller, the space forming enclosure including a recess section and a frame-shaped abutting section, the recess section constituting a perimeter structure of the space forming enclosure and being formed along a breadthways direction of the application roller, the frame-shaped abutting section extending the perimeter structure and configured to abut against the outer circumferential surface of the application roller so that, when placed against the outer circumferential surface of the application roller, an opening of the recess section is covered with the outer circumferential surface of the application roller in such a manner that an application liquid holding space is created along the breadthways direction on the outer circumferential surface of the application roller; at least one groove which has a length in a direction of rotation of the application roller and is formed at a roller-abutting surface of the abutting section on an upstream side in terms of the direction of the rotation of the application roller, the groove configured to permit excess application liquid from the application roller to re-enter the application liquid holding space; an application liquid supply port which is formed in the space forming enclosure and configured to supply application liquid to the application liquid holding space; and an application liquid supply device configured to supply the application liquid to the application liquid holding space via the application liquid supply port.