US4585326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing electrophotographic image using magnets and magnetic material
Assignee: Konica Minolta Inc
•
Filing: 1984-04-11
•
Granted: 1986-04-29
•
Expires: 2004-04-11
Abstract
Abstract A recording apparatus wherein an electrostatic latent image on an electrostatic latent image retaining member is developed into a visible image by means of a developer transported on the surface of a developer carrier having at least a magnet movably provided therein. At least a part of the electrostatic latent image retaining member is constituted by a magnetic material.
Inventors
- 👤 Yukio Okamoto
- 👤 Kiyoshi Kimura
- 👤 Tadashi Miwa
- 👤 Noriyoshi Tarumi
- 👤 Masakazu Fukuchi
- 👤 Kunio Ito
- 👤 Hiroshi Fuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:55
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0914
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
A recording apparatus comprising an image retaining member adapted to retain an electrostatic latent image thereon, and a developer carrier having therein a magnet rotatably arranged and facing said image retaining member for carrying a developer to develop the electrostatic latent image, said magnet having thereon different poles arranged alternately and uniformly around the entire periphery of said developer carrier, and a magnetic material uniformly displaced around the entire periphery of a image retaining member.
Claim 2
Dependent Claim
75 words
A recording apparatus comprising an image retaining member adapted to retain an electrostatic latent image thereon, and a developer carrier having therein a magnet rotatably arranged and facing said image retaining member for carrying a developer to develop the electrostatic latent image, said magnet having thereon different poles arranged alternately and uniformly around the entire periphery of said developer carrier, and a magnetic material uniformly displaced around the entire periphery of a image retaining member.
Claim 3
Dependent Claim
23 words
A recording apparatus according to claim 1, wherein said magnetic material is uniformly dispersed in a substrate layer of said image retaining member.
Claim 4
Dependent Claim
21 words
A recording apparatus according to claim 1, wherein said magnetic material is constituted uniformly in said electrostatic latent image retaining member.
Claim 5
Dependent Claim
21 words
A recording apparatus according to claim 1, wherein said magnetic material is constituted periodically in said electrostatic latent image retaining member.
Claim 6
Dependent Claim
88 words
A recording apparatus comprising an image retaining member adopted to retain thereon an electrostatic latent image, a developer carrier having therein a magnet rotatably arranged and facing said image retaining member for carrying a developer to develop the electrostatic latent image, said magnet having thereon different poles arranged alternately and uniformly along the entire periphery of said developer carrier, a magnetic material uniformly displaced along the entire periphery of said image retaining member, and said recording apparatus being adapted to employ a one-component magnetic developer as said developer.
Claim 7
Dependent Claim
88 words
A recording apparatus comprising an image retaining member adopted to retain thereon an electrostatic latent image, a developer carrier having therein a magnet rotatably arranged and facing said image retaining member for carrying a developer to develop the electrostatic latent image, said magnet having thereon different poles arranged alternately and uniformly along the entire periphery of said developer carrier, a magnetic material uniformly displaced along the entire periphery of said image retaining member, and said recording apparatus being adapted to employ a one-component magnetic developer as said developer.
Claim 8
Dependent Claim
15 words
A recording apparatus according to claim 1, wherein said developer carrier has a rotating sleeve.
References Cited (Backward Citations)
US3826570A
Cited
US4292386A
Cited
US4365888A
Cited
US4299474A
Cited
US4357093A
Cited
US4357103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |