US4465359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable electrophotographic copying apparatus
Assignee: Canon Inc
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Filing: 1982-07-14
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Granted: 1984-08-14
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Expires: 2002-07-14
Abstract
Abstract An image formation apparatus has an image bearing member, a process device for forming an image thereon, a developing device provided with a container having an opening opposed to the image bearing member and containing a magnetic developer therein, a developing roller for supplying the magnetic developer to the image bearing member, a magnetic field generating member for generating a magnetic field in the gap formed by the opening and the developing roller, and a grip provided on the opposite side of the apparatus from the image bearing member with respect to the opening to make the apparatus portable.
Inventors
- 👤 Kimio Nakahata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:39
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G21/00; G03G21/16; G03G21/1604; G03G2221/00; G03G2221/16; G03G2221/1678; G03G2221/1681
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
135 words
A portable electrophotographic copying apparatus, comprising: an electrophotographic photosensitive member; a latent image forming means including a movable optical scanning member for scanning an original to form a latent image corresponding to the original on said photosensitive member; developing means provided with a container having an opening opposed to said photosensitive member for containing magnetic developer therein and magnet means for forming a magnetic field in the opening; a frame for supporting said photosensitive member, latent image forming means and developing means; a grip for carrying said apparatus, said grip being provided on said frame on the side of said photosensitive member opposite the opening in said container; and lock means for locking said optical scanning member at a predetermined position for preventing said optical scanning member from moving when said apparatus is being carried.
Claim 2
Dependent Claim
135 words
A portable electrophotographic copying apparatus, comprising: an electrophotographic photosensitive member; a latent image forming means including a movable optical scanning member for scanning an original to form a latent image corresponding to the original on said photosensitive member; developing means provided with a container having an opening opposed to said photosensitive member for containing magnetic developer therein and magnet means for forming a magnetic field in the opening; a frame for supporting said photosensitive member, latent image forming means and developing means; a grip for carrying said apparatus, said grip being provided on said frame on the side of said photosensitive member opposite the opening in said container; and lock means for locking said optical scanning member at a predetermined position for preventing said optical scanning member from moving when said apparatus is being carried.
Claim 3
Dependent Claim
50 words
A portable electrophotographic copying apparatus according to claim 1, wherein said developing means comprises a developing roller for supplying magnetic developer to said photosensitive member, said developing roller comprising a non-magnetic cylindrical sleeve, and wherein said magnetic means is a magnetic member provided in said sleeve and has magnetic poles.
Claim 4
Dependent Claim
40 words
A portable electrophotographic copying apparatus according to claim 1, wherein said magnetic means has a rotatable member provided with magnetic poles therearound, for supplying the magnetic developer to said photosensitive member and for forming the magnetic field in the opening.
Claim 5
Dependent Claim
62 words
A portable electrophotographic copying apparatus according to claim 1, 2 or 3, wherein said apparatus further includes cleaning means opposite to said developing means relative to said photosensitive member, said cleaning means including a removing member for removing the magnetic developer from said photosensitive member and a container having an opening opposed to said photosensitive member for collecting the removed magnetic developer.
Claim 6
Dependent Claim
34 words
A portable electrophotographic copying apparatus according to claim 4, wherein said container of said cleaning means has a magnetic member at a side opposite to said opening which is opposed to said photosensitive member.
Claim 7
Dependent Claim
43 words
A portable electrophotographic copying apparatus according to claim 1, 2 or 3, wherein said container of said developing means has at its bottom portion a magnetic member for producing a magnetic field in a gap formed by said developing roller and said container.
Claim 8
Dependent Claim
79 words
A portable electrophotographic copying apparatus according to claim 1, wherein said grip is rotatably supported at a side of said frame for movement between a first position when said apparatus is being carried and a second position when said apparatus is not being carried, said grip being provided with an interlocking magnetic member which is brought into contact with the lower portion of said container of said developing means by the rotation of said grip to the second position.
Claim 9
Dependent Claim
58 words
A portable electrophotographic copying apparatus according to claim 7, further comprising a detecting means for detecting said first and second positions of said grip and interlocking magnetic member, and means for disconnecting electrical power to said apparatus in response to a signal from said detecting means when said grip and interlocking magnetic member are in said first position.
Claim 10
Dependent Claim
98 words
A portable electrophotographic copying apparatus, comprising: an electrophotographic photosensitive member; latent image forming means having a movable optical scanning member for scanning an original to form a latent image corresponding to the original on said photosensitive member; developing means for developing the latent image; a frame for supporting said photosensitive member, latent image forming means and developing means; a grip provided at a side of said frame for carrying said apparatus; and lock means for locking said optical scanning member at a predetermined position for preventing said optical scanning member from moving when said apparatus is being carried.
Claim 11
Dependent Claim
98 words
A portable electrophotographic copying apparatus, comprising: an electrophotographic photosensitive member; latent image forming means having a movable optical scanning member for scanning an original to form a latent image corresponding to the original on said photosensitive member; developing means for developing the latent image; a frame for supporting said photosensitive member, latent image forming means and developing means; a grip provided at a side of said frame for carrying said apparatus; and lock means for locking said optical scanning member at a predetermined position for preventing said optical scanning member from moving when said apparatus is being carried.
Claim 12
Dependent Claim
36 words
A portable electrophotographic copying apparatus according to claim 1 or 9, wherein said lock means is a plunger for locking said optical scanning member at its home position after a sequence of copying operations is completed.
Claim 13
Dependent Claim
27 words
A portable electrophotographic copying apparatus according to claim 1 or 9, wherein said optical scanning member has an original carriage capable of moving an original placed thereon.
References Cited (Backward Citations)
US3981272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |