US4771313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Service life indicator for a process cartridge
Assignee: Canon Inc
•
Filing: 1983-09-19
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Granted: 1988-09-13
•
Expires: 2003-09-19
Abstract
Abstract A service life indicator for an image forming process cartridge which contains a consumable used for image formation and is detachably mountable into a main assembly for the image formation, comprises a switching device, adapted to be provided in the process cartridge, actuatable in response to consumption of the consumable, and a warning device, responsive to the switching device, for warning an operator of when the service life of the process cartridge has been consumed.
Inventors
- 👤 Koki Kuroda
- 👤 Tsuneki Inuzuka
- 👤 Toshiaki Yagasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:35
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1875; G03G2221/00; G03G2221/16; G03G2221/1651; G03G2221/166; G03G2221/1663; G03G2221/1669; G03G2221/18; G03G2221/183; G03G2221/1846
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
120 words
In an image forming apparatus, a warning system comprising: a process cartridge including means responsive to the amount of use of said process cartridge, switch means actuated in response to said responsive means, and means for displaying information relating to the amount of use of said process cartridge; a main assembly for detachably receiving said process cartridge; guiding means for guiding said process cartridge when mounting said process cartridge to or removing from said main assembly; warning means for providing one of an audible and visual warning operable in response to said switch means; power source means for providing power to said warning means; and means for electrically coupling said power source with said switch means and said warning means.
Claim 2
Dependent Claim
120 words
In an image forming apparatus, a warning system comprising: a process cartridge including means responsive to the amount of use of said process cartridge, switch means actuated in response to said responsive means, and means for displaying information relating to the amount of use of said process cartridge; a main assembly for detachably receiving said process cartridge; guiding means for guiding said process cartridge when mounting said process cartridge to or removing from said main assembly; warning means for providing one of an audible and visual warning operable in response to said switch means; power source means for providing power to said warning means; and means for electrically coupling said power source with said switch means and said warning means.
Claim 3
Dependent Claim
15 words
An apparatus according to claim 1, wherein said warning means is provided in said cartridge.
Claim 4
Dependent Claim
16 words
An apparatus according to claim 1, wherein said warning means is provided in said main assembly.
Claim 5
Dependent Claim
106 words
In an image forming apparatus, a service life indicator comprising: a process cartridge including means responsive to the amount of service life of said process cartridge, and switch means actuated in response to said responsive means; a main assembly for detachably receiving said process cartridge; guiding means for guiding said process cartridge when mounting said process cartridge to or removing from said main assembly; warning means including one of an audible or visual warning operable in response to said switch means; power source means for providing power for said warning means; and means for electrically coupling said power source, said switch means and said warning means.
Claim 6
Dependent Claim
106 words
In an image forming apparatus, a service life indicator comprising: a process cartridge including means responsive to the amount of service life of said process cartridge, and switch means actuated in response to said responsive means; a main assembly for detachably receiving said process cartridge; guiding means for guiding said process cartridge when mounting said process cartridge to or removing from said main assembly; warning means including one of an audible or visual warning operable in response to said switch means; power source means for providing power for said warning means; and means for electrically coupling said power source, said switch means and said warning means.
Claim 7
Dependent Claim
18 words
An apparatus according to claim 4, wherein said process cartridge includes a blade provided in a developing means.
Claim 8
Dependent Claim
17 words
An apparatus according to claim 4, wherein said process cartridge includes a shielding member for a discharger.
Claim 9
Dependent Claim
125 words
In an image forming apparatus, a warning indicator comprising: a process cartridge including means responsive to the amount of use of said process cartridge, switch means actuated in response to said responsive means, and means for displaying information relating to amount of the use of said process cartridge; a main assembly for detachably receiving said process cartridge; guiding means for guiding said process cartridge when mounting said process cartridge to or removing from said main assembly; warning means, provided in said main assembly, including one of an audible and a visual alarm operable in response to said switch means; power source means for providing power to said warning means; and means for electrically coupling said power source means, said switch means and said warning means.
Claim 10
Dependent Claim
125 words
In an image forming apparatus, a warning indicator comprising: a process cartridge including means responsive to the amount of use of said process cartridge, switch means actuated in response to said responsive means, and means for displaying information relating to amount of the use of said process cartridge; a main assembly for detachably receiving said process cartridge; guiding means for guiding said process cartridge when mounting said process cartridge to or removing from said main assembly; warning means, provided in said main assembly, including one of an audible and a visual alarm operable in response to said switch means; power source means for providing power to said warning means; and means for electrically coupling said power source means, said switch means and said warning means.
Claim 11
Dependent Claim
122 words
An image forming apparatus, comprising: a process cartridge including means responsive to the amount of use of said process cartridge, switch means actuated in response to said responsive means, and means for displaying information relating to the amount of use of said process cartridge; a main assembly for detachably receiving said process cartridge; guiding means for guiding said process cartridge when mounting said process cartridge to or removing from said main assembly; warning means, provided in said process cartridge, including one of a visual warning or an audible warning operable in response to said switch means; power source means for providing power for said warning means; and means for electrically coupling said power source means, said switch means and said warning means.
Claim 12
Dependent Claim
122 words
An image forming apparatus, comprising: a process cartridge including means responsive to the amount of use of said process cartridge, switch means actuated in response to said responsive means, and means for displaying information relating to the amount of use of said process cartridge; a main assembly for detachably receiving said process cartridge; guiding means for guiding said process cartridge when mounting said process cartridge to or removing from said main assembly; warning means, provided in said process cartridge, including one of a visual warning or an audible warning operable in response to said switch means; power source means for providing power for said warning means; and means for electrically coupling said power source means, said switch means and said warning means.
Claim 13
Dependent Claim
86 words
A process cartridge mountable to and removable from a main assembly, comprising as a unit: an image bearing member; means for integrally supporting said image bearing member on the main assembly; detector means responsive to the amount of use of said process cartridge for producing a signal when a predetermined amount of use has occurred; warning member including one of an audio alarm and a visual alarm responsive to said detector means; and switch means for applying power from the power source to the warning member.
Claim 14
Dependent Claim
86 words
A process cartridge mountable to and removable from a main assembly, comprising as a unit: an image bearing member; means for integrally supporting said image bearing member on the main assembly; detector means responsive to the amount of use of said process cartridge for producing a signal when a predetermined amount of use has occurred; warning member including one of an audio alarm and a visual alarm responsive to said detector means; and switch means for applying power from the power source to the warning member.
Claim 15
Dependent Claim
15 words
A cartridge according to claim 9, wherein the warning means is provided in said cartridge.
Claim 16
Dependent Claim
39 words
A cartridge according to claim 9, wherein the warning means is provided in the main assembly and said cartridge includes means for transmitting information regarding the operation of said switch means to the warning means in the main assembly.
Claim 17
Dependent Claim
101 words
A process cartridge mountable to and removable from a main assembly, comprising as a unit: an image bearing member; means for integrally supporting said image bearing member on the main assembly; detector means responsive to the amount of use of said process cartridge for producing a use signal; warning member responsive to said signal from said detector means for producing one of an audible or a visual alarm; and switch means for applying power from the power source to the warning member; and means for displaying the amount of use of said process cartridge on the basis of said detector means.
Claim 18
Dependent Claim
101 words
A process cartridge mountable to and removable from a main assembly, comprising as a unit: an image bearing member; means for integrally supporting said image bearing member on the main assembly; detector means responsive to the amount of use of said process cartridge for producing a use signal; warning member responsive to said signal from said detector means for producing one of an audible or a visual alarm; and switch means for applying power from the power source to the warning member; and means for displaying the amount of use of said process cartridge on the basis of said detector means.
Claim 19
Dependent Claim
84 words
A process cartridge mountable to an removable from a main assembly, comprising as a unit: an image bearing member; means for integrally supporting said image bearing member on the main assembly; detector means responsive to the amount of use of said process cartridge for producing a signal when a predetermined amount of use has occurred; warning member responsive to said signal; and switch means for applying power from the power source to the warning member; and a conduit part connected with said switch means.
Claim 20
Dependent Claim
84 words
A process cartridge mountable to an removable from a main assembly, comprising as a unit: an image bearing member; means for integrally supporting said image bearing member on the main assembly; detector means responsive to the amount of use of said process cartridge for producing a signal when a predetermined amount of use has occurred; warning member responsive to said signal; and switch means for applying power from the power source to the warning member; and a conduit part connected with said switch means.
Claim 21
Dependent Claim
13 words
A cartridge according to claim 13, wherein said conduit part includes blade member.
Claim 22
Dependent Claim
17 words
A cartridge according to claim 13, wherein said conduit part includes a shield member of a charger.
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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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |