Claims
- 1. An image recording apparatus for printing an image on a conveyed recording medium, comprising:
- detecting means, arranged on a convey path of the recording medium, for detecting presence/absence of the recording medium;
- setting means for setting a debouncing time for said detecting means;
- registration rollers; and
- control means for stopping a drive operation of said registration rollers in response to a change in paper presence/absence detection state of said detecting means from the paper presence state to the paper absence state,
- wherein said detecting means is arranged upstream of said registration rollers in a paper convey direction.
- 2. An apparatus according to claim 1, further comprising switching means for switching the debouncing time between a case wherein a presence/absence state of the recording medium detected by said detecting means changes from a paper presence state to a paper absence state and a case wherein the presence/absence state changes from the paper absence state to the paper presence state.
- 3. An apparatus according to claim 1, wherein said control means comprises time measuring means for measuring a drive time of said registration rollers, and said registration rollers are driven independently of the detection state of said detecting means while said time measuring means is measuring a predetermined period of time after the drive operation of said registration rollers is started.
- 4. An apparatus according to claim 1, further comprising time measuring means for measuring a drive time of said registration rollers,
- wherein said detecting means does not detect the presence/absence of the recording medium until a predetermined period of time, as measured by said time measuring means, after the drive operation of said registration rollers is started.
- 5. An apparatus according to claim 1, further comprising:
- state detecting means for detecting a state of said image recording apparatus, and switching means for switching the debouncing time in accordance with the state of said image recording apparatus detected by said state detecting means.
- 6. An apparatus according to claim 1, further comprising:
- image forming means for electrostatically forming an image onto the recording medium.
- 7. An apparatus according to claim 6, wherein said image forming means comprises means for transferring an image formed on an image carrier onto the recording medium, and said switching means switches the debouncing time for a predetermined period of time after a drive operation of said image carrier is started.
- 8. An apparatus according to claim 1, further comprising:
- registration rollers, and
- switching means for switching the debouncing time for a predetermined period of time in response to start of a drive operation of said registration rollers.
- 9. An apparatus according to claim 1, wherein said detecting means is arranged near a discharging section of the recording medium.
- 10. An apparatus according to claim 1, wherein said apparatus starts an image forming operation in response to a print command from an external apparatus, and further comprising switching means for switching the debouncing time when said apparatus waits for reception of the print command.
- 11. An image recording apparatus for printing an image on a conveyed recording medium, comprising:
- a plurality of detecting means, arranged at different positions on a convey path of the recording medium, for detecting a presence/absence of the recording medium; and
- setting means capable of setting different debouncing times for each detecting means of said plurality of detecting means.
- 12. An apparatus according to claim 11, further comprising:
- image forming means for forming an image onto the recording medium, and
- wherein said image forming means electrostatically forms an image.
- 13. An apparatus according to claim 11,
- wherein one of said plurality of detecting means is arranged near a discharging section of the recording medium.
- 14. An apparatus according to claim 11, further comprising:
- registration rollers,
- wherein one of said plurality of detecting means is arranged near the registration rollers.
- 15. An apparatus according to claim 14, further comprising registration rollers, and control means for stopping a drive operation of said registration rollers in response to a change in paper presence/absence detection state of said one of said plurality of detecting means from the paper presence state to the paper absence state,
- wherein said one of said plurality of detecting means is arranged at an upstream side of said registration rollers in a paper convey direction.
- 16. An apparatus according to claim 15, further comprising:
- time measuring means for measuring a drive time of said registration rollers, and
- wherein said one of said plurality of detecting means does not detect the presence/absence of the recording medium while said time measuring means is measuring a predetermined period of time after the drive operation of said registration rollers is started.
Priority Claims (3)
Number |
Date |
Country |
Kind |
4-150732 |
Jun 1992 |
JPX |
|
4-150734 |
Jun 1992 |
JPX |
|
5-126168 |
May 1993 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/070,878, filed Jun. 3, 1993, now abandoned.
US Referenced Citations (10)
Continuations (1)
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Number |
Date |
Country |
Parent |
70878 |
Jun 1993 |
|