Recording apparatus and method having a temperature overrise protection function

• US 6,247,777 B1
• Filed: 07/28/1995
• Issued: 06/19/2001
• Est. Priority Date: 07/29/1994
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Shimoda, Junji
• Primary Examiner(s): Mahoney, Christopher E.
• Application Number:
  US08/508,537
• Time in Patent Office: 2,153 Days
• Field of Search: 347/14, 347/17, 347/18, 347/19, 347/29
• US Class Current: 347/14
• CPC Class Codes: B41J 2/04515 preventing overheating
• CPC Class Codes: B41J 2/0454 involving calculation of temperature
• CPC Class Codes: B41J 2/04563 detecting head temperature; Ink temperature
• CPC Class Codes: B41J 2/0458 controlling heads based on heating elements forming bubbles
• CPC Class Codes: B41J 2002/14362 Assembling elements of heads

Abstract

A recording apparatus and method are disclosed wherein when it is determined that an estimated temperature of an outer wall of a recording head is above a first predetermined temperature, a recording operation is stopped until the temperature falls below a second predetermined safe temperature.

Claims

1. A recording apparatus for recording on a recording medium by using a recording head, said recording apparatus comprising:

a temperature sensor provided within the recording head;

acquiring means for acquiring information relating to an estimated temperature of an outer wall of the recording head by estimation based on an output of said temperature sensor, the estimated temperature of the outer wall of the recording head being correlated to the output of the temperature sensor;

control means for suspending a recording operation of said recording apparatus when it is determined that the estimated temperature of the outer wall of the recording head is above a first predetermined temperature, based on the information acquired by said acquiring means, and resuming the recording operation after execution of a predetermined suspension operation; and

an exchanging mechanism for exchanging the recording head,

wherein said control means controls movement of the recording head to a predetermined waiting position where it is difficult for a user to touch the outer wall of the recording head during the predetermined suspension operation,

wherein when the estimated temperature of the outer wall of the recording head is above the first predetermined temperature, said control means suspends the recording operation of said recording apparatus until the estimated temperature of the outer wall falls below a second predetermined temperature lower than the first predetermined temperature and resumes the recording operation after the estimated temperature of the outer wall falls below the second predetermined temperature, and

wherein said control means inhibits the operation of said exchanging mechanism when the recording operation is suspended.

2. A recording apparatus according to claim 1, further comprising suction means for sucking ink, wherein the recording head discharges ink for recording, and said control means controls said suction means to suck the ink from discharge ports of the recording head when the recording operation is suspended.

3. A recording apparatus according to claim 2, wherein the recording head is covered by a cover member at the predetermined waiting position during the predetermined suspension operation.

4. A recording apparatus according to claim 1, wherein the recording head generates air bubbles in the ink by utilizing thermal energy and discharges the ink as the air bubbles are generated.

5. A recording apparatus according to claim 1, wherein the recording head is covered by a cover member at the predetermined waiting position during the predetermined suspension operation.

6. A recording apparatus according to claim 1, further comprising a carriage for mounting said recording head thereon.

7. A recording apparatus according to claim 1, wherein said recording apparatus is applied to a facsimile machine.

8. A recording apparatus according to claim 1, wherein said recording apparatus is applied to a copying machine.

9. A recording apparatus according to claim 1, wherein said recording apparatus is applied to a word processor.

10. A recording apparatus according to claim 1, wherein the recording operation is resumed after a predetermined time following suspension of the recording operation.

11. A recording method for recording on a recording medium by using a recording head in a recording apparatus, a temperature sensor being provided within the recording head, said method comprising the steps of:

acquiring information relating to an estimated temperature of an outer wall of the recording head by estimation based on an output of said temperature sensor, the estimated temperature of the outer wall of the recording head being correlated to the output of the temperature sensor;

suspending a recording operation of the recording apparatus when it is determined that the estimated temperature of the outer wall of the recording head is above a first predetermined temperature, based on the information acquired in said acquiring step, and resuming the recording operation after execution of a predetermined suspension operation; and

moving the recording head to a predetermined waiting position where it is difficult for a user to touch the outer wall of the recording head during the predetermined suspension operation,

wherein when the estimated temperature of the outer wall of the recording head is above the first predetermined temperature, the recording operation of the recording apparatus is suspended until the estimated temperature of the outer wall falls below a second predetermined temperature lower than the first predetermined temperature and the recording operation is resumed after the estimated temperature of the outer wall falls below the second predetermined temperature, and

wherein said interrupting step inhibits an exchanging operation of the recording head when the recording operation is suspended.

12. A recording method according to claim 11, further comprising the step of sucking ink, wherein the recording head discharges ink for recording, and said interrupting step includes the sucking step to suck the ink from discharge ports of the recording head when the recording operation is suspended.

13. A recording method according to claim 12, wherein the recording head is covered with a cover member at the predetermined waiting position during the predetermined suspension operation.

14. A recording method according to claim 11, wherein the recording head is covered with a cover member at the predetermined waiting position during the predetermined suspension operation.

15. A recording method according to claim 11, wherein the recording operation is resumed after a predetermined time following suspension of the recording operation.