System and method for cleaning a printhead

Patent metadata

Field	Value
Publication number	US-11110709-B2
Application number	US-202016780419-A
Country	US
Kind code	B2
Filing date	Feb 3, 2020
Priority date	Aug 30, 2019
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A system for cleaning and treating a printhead includes (a) a movable carriage having affixed to a base of the movable carriage a cleaning blade and an absorptive pad, (b) a low vapor pressure organic solvent, the low vapor pressure organic solvent is deliverable to the absorptive pad via a pump, the low vapor pressure organic solvent has a vapor pressure lower than water and (c) a carriage moving mechanism that moves the carriage so that the cleaning blade and the absorptive pad pass over the printhead.

First claim

What is claimed is:

1. A system for cleaning a printhead comprising:
(a) a movable carriage having affixed to a base:
a cleaning blade; and
an absorptive pad;

(b) a low vapor pressure organic solvent;
wherein the low vapor pressure organic solvent is deliverable to the absorptive pad via a pump; and
wherein the low vapor pressure organic solvent has a vapor pressure lower than water;

and
(d) a brush that is fixed so that the brush is stationary relative to the carriage, wherein movable carriage is configured to move the cleaning blade and absorptive pad past the brush, thereby allowing the brush to clean the cleaning blade and the absorptive pad.

2. The system of claim 1 , wherein the low vapor pressure organic solvent has a vapor pressure less than about 1 kpascal at 25° C.

3. The system of claim 1 , wherein the low vapor pressure organic solvent is selected from the group amyl acetate, benzyl alcohol, n-butanol, cyclohexane, ethyl glycol, ethylene glycol, tetrachloroethane, and nonane.

4. The system of claim 1 , further comprising a water source and a pump to deliver water to the brush.

5. The system of claim 1 , further comprising a waste collection system to remove spent water, purged ink and organic solvent from the carriage.

6. The system of claim 5 , wherein the waste collection system comprises a pump, tubing connected to the pump and disposed near the bottom of the carriage, and a waste container.

7. The system of claim 5 , where the waste collection system comprises a non-porous structure at the bottom of the carriage.

8. A method of cleaning a printhead comprising:
providing a system for cleaning a printhead comprising:
a. a movable carriage having affixed to a recessed base:
a cleaning blade; and
an absorptive pad; and

b. a low vapor pressure organic solvent;
wherein the low vapor pressure solvent is deliverable to the absorptive pad via a pump; and
wherein the low vapor pressure organic solvent has a vapor pressure lower than water; and

moving the carriage so that the cleaning blade and the absorptive pad pass over the printhead; and
moving the carriage so that the cleaning blade and the absorptive pad pass over a brush that cleans the cleaning blade and the absorptive pad.

9. The method of claim 8 , further comprising removing waste from the bottom of the carriage.

10. The method of claim 8 , further comprising delivering water to the brush.

11. The method of claim 8 , wherein the carriage is moved so that the cleaning blade and the absorptive pad pass over the printhead after an ink purge.

12. The method of claim 8 , wherein the low vapor pressure organic solvent has a vapor pressure less than about 1 kpascal at 25° C.

13. The method of claim 8 , wherein the low vapor pressure organic solvent is selected from the group amyl acetate, benzyl alcohol, n-butanol, cyclohexane, ethyl glycol, ethylene glycol, tetrachloroethane, and nonane.

Assignees

• Xerox Corp

Inventors

• Levy Michael J
• Praharaj Seemit
• Lefevre Jason M
• Hoover Linn C
• Mcconville Paul J
• Liu Chu-Heng
• Herrmann Douglas K
• Vankouwenberg David A

Classifications

• B41J2/16535

  using wiping constructions (B41J2/16552 takes precedence) · CPC title

• B41J2002/16558

  Using cleaning liquid for wet wiping · CPC title

• B41P2235/30

  Recovering used solvents or residues · CPC title

• B41J2/16552 Primary

  using cleaning fluids · CPC title

• B41J2002/16594

  Pumps or valves for cleaning · CPC title