US5455659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus with detector for detecting object to be detected
Assignee: Canon Inc
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Filing: 1994-11-22
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Granted: 1995-10-03
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Expires: 2014-11-22
Abstract
Abstract An image recording apparatus for printing an image on a conveyed recording medium, includes a sensor, arranged on a convey path of the recording medium, for detecting presence/absence of the recording medium, a setting unit for setting a debouncing time of the recording medium, and a switching unit for switching the debouncing time.
Inventors
- 👤 Masanori Ishizu
- 👤 Hiroshi Hashimoto
- 👤 Soya Endo
- 👤 Hitoshi Machino
- 👤 Tomohiro Nakamori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:48
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6555; G03G15/6558; G03G15/6561; G03G2215/00; G03G2215/00362; G03G2215/00367; G03G2215/00405; G03G2215/00535; G03G2215/00611; G03G2215/00616; G03G2215/00717; G03G2215/00734
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
97 words
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.
Claim 2
Dependent Claim
97 words
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.
Claim 3
Dependent Claim
60 words
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.
Claim 4
Dependent Claim
60 words
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.
Claim 5
Dependent Claim
56 words
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.
Claim 6
Dependent Claim
44 words
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.
Claim 7
Dependent Claim
20 words
An apparatus according to claim 1, further comprising: image forming means for electrostatically forming an image onto the recording medium.
Claim 8
Dependent Claim
50 words
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.
Claim 9
Dependent Claim
36 words
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.
Claim 10
Dependent Claim
20 words
An apparatus according to claim 1, wherein said detecting means is arranged near a discharging section of the recording medium.
Claim 11
Dependent Claim
44 words
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.
Claim 12
Dependent Claim
58 words
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.
Claim 13
Dependent Claim
58 words
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.
Claim 14
Dependent Claim
29 words
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.
Claim 15
Dependent Claim
24 words
An apparatus according to claim 11, wherein one of said plurality of detecting means is arranged near a discharging section of the recording medium.
Claim 16
Dependent Claim
24 words
An apparatus according to claim 11, further comprising: registration rollers, wherein one of said plurality of detecting means is arranged near the registration rollers.
Claim 17
Dependent Claim
75 words
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.
Claim 18
Dependent Claim
61 words
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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-10-02 | 1999-04-03 | 1999-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-02 | 2003-04-03 | 2003-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-02 | 2007-04-03 | 2007-10-03 | $7700.00 | Window Closed / Lapsed |