Printing apparatus and control method

Patent metadata

Field	Value
Publication number	US-12459254-B2
Application number	US-202318535834-A
Country	US
Kind code	B2
Filing date	Dec 11, 2023
Priority date	Dec 16, 2022
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A printing apparatus including a printing unit configured with an ejection port surface for ejecting ink, a wiping unit configured to wipe the ejection port surface using a wiping member by relative movement with the printing unit, an application unit configured to apply a wiping liquid to the wiping member, a detection unit configured to detect the ink on the wiping member, and a control unit configured to cause the printing unit to print a predetermined pattern on a predetermined area of the wiping member and to cause the application unit to apply the wiping liquid, and, then, to cause the detection unit to detect the ink on the predetermined area.

First claim

What is claimed is:

1 . A printing apparatus comprising:
a printing unit configured with an ejection port surface for ejecting ink; a wiping unit configured to wipe the ejection port surface using a wiping member by relative movement with the printing unit; an application unit configured to apply a wiping liquid to the wiping member; a detection unit configured to detect the ink on the wiping member; and a control unit configured to cause the printing unit to print a predetermined pattern on a predetermined area of the wiping member and cause the application unit to apply the wiping liquid, and, then, to cause the detection unit to detect the ink on the predetermined area.

2 . The printing apparatus according to claim 1 ,
wherein the detection unit detects a concentration of the ink.

3 . The printing apparatus according to claim 2 ,
wherein the detection unit detects the concentration of the ink in the predetermined area by relative movement with the wiping unit.

4 . The printing apparatus according to claim 1 ,
wherein the predetermined pattern is a line extending in a predetermined direction.

5 . The printing apparatus according to claim 4 ,
wherein the predetermined pattern is formed with a plurality of the lines arranged side by side in a direction intersecting the predetermined direction.

6 . The printing apparatus according to claim 5 ,
wherein an interval between the lines is greater than a resolution of the detection unit.

7 . The printing apparatus according to claim 4 ,
wherein a width of the line is greater than a resolution of the detection unit.

8 . The printing apparatus according to claim 4 ,
wherein the control unit causes the application unit to apply the wiping liquid to the predetermined area again in a case when a width of the line detected by the detection unit is a first length, and does not cause the application unit to apply the wiping liquid in a case when the width is a second length, which is longer than the first length.

9 . The printing apparatus according to claim 4 ,
wherein the control unit fills the application unit with the wiping liquid in a case when a width of the line detected by the detection unit is a first length, and does not fill the application unit with the wiping liquid in a case when the width is a second length, which is longer than the first length.

10 . The printing apparatus according to claim 9 ,
wherein the application unit is filled with the wiping liquid and then the application unit is caused to apply the wiping liquid to the predetermined area again in a case when the width is the first length.

11 . The printing apparatus according to claim 4 ,
wherein the control unit provides a notification of an error in a case when a width of the line detected by the detection unit is less a threshold value.

12 . The printing apparatus according to claim 1 ,
wherein the control unit causes the application unit to apply the wiping liquid to the predetermined area again in a case when bleeding of the ink of the predetermined pattern is at a first amount, and does not cause the application unit to apply the wiping liquid in a case when the bleeding is at a second amount, which is greater than the first amount.

13 . The printing apparatus according to claim 1 ,
wherein the control unit fills the application unit with the wiping liquid in a case when bleeding of the ink of the predetermined pattern is at a first amount, and does not fill the application unit with the wiping liquid in a case when the bleeding is at a second amount, which is greater than the first amount.

14 . The printing apparatus according to claim 13 ,
wherein the control unit fills the application unit with the wiping liquid and then causes the application unit to apply the wiping liquid to the predetermined area again in a case when the bleeding is at the first amount.

15 . The printing apparatus according to claim 1 ,
the detection unit is an optical sensor, the detection unit detects an amount of received light from the wiping member before printing the predetermined pattern on the predetermined area and applying the wiping liquid, and wherein a notification of an error is provided in a case when the amount of received light is not within a predetermined range.

16 . The printing apparatus according to claim 1 ,
wherein the predetermined pattern is printed using a black ink.

17 . The printing apparatus according to claim 1 ,
wherein the wiping liquid is applied after the predetermined pattern is printed on the predetermined area.

18 . The printing apparatus according to claim 1 ,
wherein the predetermined pattern is printed after the wiping liquid is applied to the predetermined area.

19 . A control method of controlling a printing apparatus that includes
a printing unit configured with an ejection port surface for ejecting ink, and a wiping unit configured to wipe the ejection port surface using a wiping member by relative movement with the printing unit, the control method comprising: printing a predetermined pattern, by the printing unit, on a predetermined area of the wiping member; applying a wiping liquid to the wiping member after printing; and detecting the ink on the predetermined area after applying the wiping liquid.

20 . The control method according to claim 19 ,
further comprising: detecting an amount of received light from the wiping member before printing; and providing a notification of an error in a case when the amount of received light is not within a predetermined range.

Assignees

• Canon Kk

Inventors

• Ishimi Keita
• Danzuka Toshimitsu
• Takekoshi Rie
• Ogata Takao
• Tomida Akihiro
• Aichi Akiko

Classifications

• B41J29/17 Primary

  Cleaning arrangements · CPC title

• B41J2002/16558

  Using cleaning liquid for wet wiping · CPC title

• B41J2/0458

  controlling heads based on heating elements forming bubbles · CPC title

• B41P2235/20

  Wiping devices · CPC title

• B41J2/16552

  using cleaning fluids · CPC title