LIQUID APPLYING APPARATUS AND INK JET PRINTING APPARATUS

• US 20080134972A1
• Filed: 11/27/2007
• Published: 06/12/2008
• Est. Priority Date: 12/11/2006
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Otsuka, Naoji, Masuda, Satoshi, Masuyama, Atsuhiko, Nakagawa, Yoshinori, Iwasaki, Osamu
• Granted Patent: US 8,726,834 B2
• Time in Patent Office: Days
• US Class Current: 118/712
• CPC Class Codes: B41J 11/0015 for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing selective coating B41J2/2114
• CPC Class Codes: B41J 29/38 Drives, motors, controls or automatic cut-off devices for the entire printing mechanism

Abstract

An object of the present invention is to provide a liquid applying apparatus which can inhibit a variation in application amount associated with the individual variability of a component of the apparatus. According to the present invention, a liquid holding space in which a liquid is held is formed between the applying member and the liquid holding member. When the applying member moves, the liquid attached to the applying member is fed out of the liquid holding space together with the applying member. The liquid is applied to a medium. The application amount of liquid applied to the applying medium varies depending on the individual variability of a component such as a liquid applying member. The variation in liquid application amount is adjusted by adjusting section for adjusting, the rotation speed of the liquid holding member or the flow speed of the liquid flowing through the liquid holding space.

Claims

1. A liquid applying apparatus comprising:

a liquid applying unit comprising an applying member that applies a liquid to a medium and a liquid holding member that abuts against the applying member to form a liquid holding space in which a liquid is held, the applying member being rotated to apply the liquid in the liquid holding space to the medium via the applying member; and

adjusting means for adjusting the amount of the liquid applied to the medium on the basis of information on individual variability of the liquid applying apparatus.

2. The liquid applying apparatus according to claim 1, wherein the individual variability information is information indicating the amount of the liquid applied to the medium.

3. The liquid applying apparatus according to claim 1, wherein the individual variability information is information indicating a difference in a surface property of the applying member.

4. The liquid applying apparatus according to claim 3, wherein the surface property is surface roughness.

5. The liquid applying apparatus according to claim 3, wherein the surface property is wettability of the applying member by the liquid.

6. The liquid applying apparatus according to claim 1, wherein the individual variability information is information indicating a difference in abutting pressure between the abutting member and the applying member.

7. The liquid applying apparatus according to claim 1, further comprising liquid flowing means for allowing the liquid to flow from a liquid supply port that is in communication with an interior of the liquid holding space to a liquid collecting port that is in communication with the liquid holding space, wherein the individual variability information is information indicating a difference in the flow speed of the liquid which occurs in the liquid holding space.

8. The liquid applying apparatus according to claim 7, wherein the adjusting means adjusts the flow speed of the liquid.

9. The liquid applying apparatus according to claim 1, wherein the adjusting means adjusts a moving speed at which the applying member moves with respect to the liquid holding member.

10. An ink jet printing apparatus comprising:

a liquid applying unit comprising an applying member that applies a liquid to a medium and a liquid holding member that abuts against the applying member to form a liquid holding space in which a liquid is held, the applying member being rotated to apply the liquid in the liquid holding space to the medium via the applying member;

a print head that ejects ink to the medium to which the liquid has been applied by the liquid applying unit; and

adjusting means for adjusting the amount of the liquid applied to the medium on the basis of information on individual variability of the liquid applying apparatus.