US4627703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming images from positive and negative originals
Assignee: Canon Inc
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Filing: 1986-02-13
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Granted: 1986-12-09
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Expires: 2006-02-13
Abstract
Abstract An image forming apparatus which is capable of forming a positive image either from a negative original or a positive original. The apparatus is provided with a device for preventing the non-image area of the photosensitive member from being developed by a developer, so as to avoid a wastefull consumption of the developer. The operation of the preventing means is controlled in dependence on whether the original is positive or negative, so that the prevention of the non-image area development is effectively performed independently of whether the original is negative or positive.
Inventors
- 👤 Hiroaki Suzuki
- 👤 Shinji Murata
- 👤 Masanari Shirai
- 👤 Kazuhiko Onuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/221; G03G15/223; G03G15/04; G03G15/043; G03G15/0435
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
56 words
A cartridge detachably mountable into an image forming apparatus, comprising: a photosensitive member; a casing for supporting said photosensitive member; and means, operable when mounted in the main assembly, for actuating means for preventing a non-image area of said photosensitive member from being exposed to light, upon formation of a positive image from a negative original.
Claim 2
Dependent Claim
56 words
A cartridge detachably mountable into an image forming apparatus, comprising: a photosensitive member; a casing for supporting said photosensitive member; and means, operable when mounted in the main assembly, for actuating means for preventing a non-image area of said photosensitive member from being exposed to light, upon formation of a positive image from a negative original.
Claim 3
Dependent Claim
17 words
A cartridge according to claim 1, wherein said actuating means includes a projection formed on said casing.
Claim 4
Dependent Claim
25 words
A cartridge according to claim 1, wherein the actuation of said actuating means is effected by said actuating means not acting on said preventing means.
Claim 5
Dependent Claim
25 words
A cartridge according to claim 1, wherein process conditions for the photosensitive member are automatically set when said cartridge is mounted into said main assembly.
Claim 6
Dependent Claim
23 words
A cartridge according to claim 4, wherein said cartridge controls means provided in said main assembly to form an image of the original.
Claim 7
Dependent Claim
19 words
A cartridge according to claim 1, further comprising means for developing a latent image formed on said photosensitive member.
Claim 8
Dependent Claim
19 words
A cartridge according to claim 1, further comprising at cleaning means for removing residual toner from said photosensitive member.
Claim 9
Dependent Claim
38 words
A cartridge according to claim 1, further comprising a discharger for uniformly charging said photosensitive member, means for developing a latent image formed on said photosensitive member and cleaning means for removing residual toner from said photosensitive member.
Claim 10
Dependent Claim
84 words
An image forming apparatus for forming a positive image from a negative and positive originals, comprising: a main assembly; a cartridge detachably mountable into said main assembly and containing a photosensitive member; means for preventing a non-image area of the photosensitive member from being exposed to light; means for actuating said preventing means in association with an imagewise exposure of the photosensitive member; and means for disabling operation of said preventing means, depending on the kind of the cartridge mounted in said main assembly.
Claim 11
Dependent Claim
84 words
An image forming apparatus for forming a positive image from a negative and positive originals, comprising: a main assembly; a cartridge detachably mountable into said main assembly and containing a photosensitive member; means for preventing a non-image area of the photosensitive member from being exposed to light; means for actuating said preventing means in association with an imagewise exposure of the photosensitive member; and means for disabling operation of said preventing means, depending on the kind of the cartridge mounted in said main assembly.
Claim 12
Dependent Claim
36 words
An apparatus according to claim 9, wherein said preventing means includes a combination of a movable reflecting mirror for reflecting light from a light source to the photosensitive member and a member for blocking a light.
Claim 13
Dependent Claim
24 words
An apparatus according to claim 10, wherein said disabling means includes light blocking means disposed optically between the light source and the reflecting mirror.
Claim 14
Dependent Claim
27 words
An apparatus according to claim 9, wherein said disabling means is operated in response to the mounting and demounting of a cartridge which is for negative originals.
Claim 15
Dependent Claim
30 words
An apparatus according to claim 9, wherein the cartridge, when mounted into said main assembly, actuates said disabling means and sets an image forming process condition corresponding to the cartridge.
Claim 16
Dependent Claim
20 words
An apparatus according to claim 13, wherein the image forming condition is a quantity of light for illuminating an original.
Claim 17
Dependent Claim
16 words
An apparatus according to claim 9, wherein said apparatus is a printer for reproducing a microfilm.
Claim 18
Dependent Claim
67 words
An assembly usable with a process cartridge for forming positive images from a negative and positive originals, comprising: blank exposure means for exposing to light a non-image area of a photosensitive member contained in the process cartridge; means for actuating said blank exposure means to expose the non-image area of the photosensitive member to light; and means, actuable by the process cartridge, for disabling said exposure means.
Claim 19
Dependent Claim
67 words
An assembly usable with a process cartridge for forming positive images from a negative and positive originals, comprising: blank exposure means for exposing to light a non-image area of a photosensitive member contained in the process cartridge; means for actuating said blank exposure means to expose the non-image area of the photosensitive member to light; and means, actuable by the process cartridge, for disabling said exposure means.
Claim 20
Dependent Claim
83 words
An image forming apparatus for forming a positive image either from negative or positive originals, comprising: a main assembly; a cartridge detachably mounted into said main assembly and containing a photosensitive member; means for preventing a non-image area of the photosensitive member from being exposed to light; means for actuating said preventing means in association with an imagewise exposure of the photosensitive member; and means for disabling the operation of said preventing means, in association with a switching operation in said main assembly.
Claim 21
Dependent Claim
83 words
An image forming apparatus for forming a positive image either from negative or positive originals, comprising: a main assembly; a cartridge detachably mounted into said main assembly and containing a photosensitive member; means for preventing a non-image area of the photosensitive member from being exposed to light; means for actuating said preventing means in association with an imagewise exposure of the photosensitive member; and means for disabling the operation of said preventing means, in association with a switching operation in said main assembly.
Claim 22
Dependent Claim
19 words
An apparatus according to claim 17, wherein said switching is effected in association with the mounting of said cartridge.
Claim 23
Dependent Claim
30 words
An apparatus according to claim 18, wherein said detachably mounted cartridge can be of more than one type and said switching is effected depending on the type of said cartridge.
Claim 24
Dependent Claim
25 words
An apparatus according to claim 18, further comprising a lamp for producing light for illuminating an original and for exposing the photosensitive member to light.
Claim 25
Dependent Claim
20 words
An assembly according to claim 16, wherein said blank exposure means uses light from a lamp for illuminating an original.
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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) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |