US5008708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monocomponent developing device
Assignee: Minolta Co Ltd
•
Filing: 1990-01-22
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Granted: 1991-04-16
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Expires: 2010-01-22
Abstract
Abstract A developing device adjoins a rotatably arranged a photoreceptor, and is internally provided with a rotatably disposed developing roller confronting the photoreceptor, a cylindrically formed flexible film member having a peripheral length longer than that of the developing roller and loosely mounted thereover, a first member for forming a slack of the film member, for example, a regulating blade or a cleaning blade, a second member for controlling the position of the slack of the film member, for example, a magnet.
Inventors
- 👤 Yuji Enoguchi
- 👤 Toshiya Natsuhara
- 👤 Masashi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:30
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/01; G03G15/0105; G03G15/0126; G03G15/09
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
56 words
A developing device for developing an electrostatic latent image formed on a photoreceptor, comprising: a cylindrical formed flexible member; means for pressing said flexible member into contact with a surface portion of the photoreceptor using a magnetic force; means for rotating said flexible member; and means for providing toner to a surface of said flexible member.
Claim 2
Dependent Claim
56 words
A developing device for developing an electrostatic latent image formed on a photoreceptor, comprising: a cylindrical formed flexible member; means for pressing said flexible member into contact with a surface portion of the photoreceptor using a magnetic force; means for rotating said flexible member; and means for providing toner to a surface of said flexible member.
Claim 3
Dependent Claim
23 words
A developing device as claimed in claim 1 wherein said flexible member includes a magnetic substance and said pressing means includes a magnet.
Claim 4
Dependent Claim
108 words
A developing device for developing an electrostatic latent image formed on a photoreceptor, comprising: a cylindrically formed flexible member, said flexible member including a magnetic substance; rotating means for rotating said flexible member which includes a roller member rotatably disposed and confronting the photoreceptor, said roller member having an external peripheral length shorter than an internal peripheral length of said flexible member so as to loosely support said flexible member; magnetic pressing means provided inside of said roller means for pressing said flexible member into contact with a surface of the photoreceptor; and forming means for forming a toner layer on an external surface of said flexible member.
Claim 5
Dependent Claim
108 words
A developing device for developing an electrostatic latent image formed on a photoreceptor, comprising: a cylindrically formed flexible member, said flexible member including a magnetic substance; rotating means for rotating said flexible member which includes a roller member rotatably disposed and confronting the photoreceptor, said roller member having an external peripheral length shorter than an internal peripheral length of said flexible member so as to loosely support said flexible member; magnetic pressing means provided inside of said roller means for pressing said flexible member into contact with a surface of the photoreceptor; and forming means for forming a toner layer on an external surface of said flexible member.
Claim 6
Dependent Claim
28 words
A developing device as claimed in claim 3 wherein said magnetic means includes a magnet which has a plurality of poles along a surface of said roller member.
Claim 7
Dependent Claim
18 words
A developing device as claimed in claim 3 wherein said magnetic means includes a substantially semicircular shaped magnet.
Claim 8
Dependent Claim
15 words
A developing device as claimed in claim 3 wherein said magnetic means includes an electro-magnet.
Claim 9
Dependent Claim
19 words
A developing device as claimed in claim 3 wherein a toner forming said toner layer is a magnetic toner.
Claim 10
Dependent Claim
17 words
A developing device as claimed in claim 3 wherein said flexible member is a metallic thin film.
Claim 11
Dependent Claim
29 words
A developing device as claimed in claim 3 wherein said roller member is formed of aluminum whose surface has minute concave and convex portions, conductive rubber of conductive plastic.
Claim 12
Dependent Claim
22 words
A developing device as claimed in claim 3, wherein said flexible member is a thin resinous film having fine metallic particles therein.
Claim 13
Dependent Claim
82 words
In a developing device disposed adjacent to a rotatably arranged photoreceptor for developing an electrostatic latent image formed on the photoreceptor, a method comprising the steps of: providing a cylindrically formed flexible member; pressing said flexible member, by means of a magnetic force, into contact with a surface of the photoreceptor; rotating said flexible member; and providing toner to a surface of said flexible member, said provided toner being transported to a location confronting the photoreceptor to develop the electrostatic latent image.
Claim 14
Dependent Claim
82 words
In a developing device disposed adjacent to a rotatably arranged photoreceptor for developing an electrostatic latent image formed on the photoreceptor, a method comprising the steps of: providing a cylindrically formed flexible member; pressing said flexible member, by means of a magnetic force, into contact with a surface of the photoreceptor; rotating said flexible member; and providing toner to a surface of said flexible member, said provided toner being transported to a location confronting the photoreceptor to develop the electrostatic latent image.
Claim 15
Dependent Claim
17 words
A method for developing as claimed in claim 11 wherein said flexible member includes a magnetic substance.
Claim 16
Dependent Claim
65 words
A developing device for developing an electrostatic latent image formed on a photoreceptor, comprising: a cylindrical flexible member; means for rotating said flexible member; means for providing toner to a surface of said flexible member; and magnetic urging means for magnetically urging said flexible member surface into contact with the photoreceptor to thereby provide said toner to the photoreceptor to develop the electrostatic latent image.
Claim 17
Dependent Claim
65 words
A developing device for developing an electrostatic latent image formed on a photoreceptor, comprising: a cylindrical flexible member; means for rotating said flexible member; means for providing toner to a surface of said flexible member; and magnetic urging means for magnetically urging said flexible member surface into contact with the photoreceptor to thereby provide said toner to the photoreceptor to develop the electrostatic latent image.
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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) | 1994-04-15 | 1994-10-15 | 1995-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-15 | 1998-10-15 | 1999-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-15 | 2002-10-15 | 2003-04-16 | $7700.00 | Window Closed / Lapsed |