US5095341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus using one component developing agent with roller applicator
Assignee: Toshiba Corp
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Filing: 1991-03-11
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Granted: 1992-03-10
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Expires: 2011-03-11
Abstract
Abstract An image forming apparatus including a developing roller, opposing a rotatable photoreceptor, for supplying an one-component developing agent to the photoreceptor, and a blade for forming a developing agent layer of the one-component developing agent to be supplied to the photoreceptor on the developing roller. The developing of the image is performed under conditions satisfying the following relation:
Inventors
- 👤 Minoru Yoshida
- 👤 Kouji Hirano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:16
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/06; G03G13/08; G03G15/00; G03G15/06; G03G15/08; G03G15/0806
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
An image forming apparatus comprising: roller means, opposing a rotatable image carrying member, for supplying a one-component developing agent to the rotatable image carrying member; means for forming a developing agent layer of the one-component developing agent to be supplied to the image carrying member on the roller means; and means for developing a latent image on the rotatable image carrying member by the one-component developing agent supplied by the supplying means under conditions satisfying the following relation: 0.4≦m.sub.dev /(m.sub.1.p)≦0.8 where m 1 is an amount of the one-component developing agent per unit area of the developing agent layer, m dev is an amount of the one-component developing agent deposited per unit area on the image carrying member, at the maximum image density, and p is a ratio of a circumferential speed of said roller means to that of the rotatable image carrying member.
Claim 2
Dependent Claim
144 words
An image forming apparatus comprising: roller means, opposing a rotatable image carrying member, for supplying a one-component developing agent to the rotatable image carrying member; means for forming a developing agent layer of the one-component developing agent to be supplied to the image carrying member on the roller means; and means for developing a latent image on the rotatable image carrying member by the one-component developing agent supplied by the supplying means under conditions satisfying the following relation: 0.4≦m.sub.dev /(m.sub.1.p)≦0.8 where m 1 is an amount of the one-component developing agent per unit area of the developing agent layer, m dev is an amount of the one-component developing agent deposited per unit area on the image carrying member, at the maximum image density, and p is a ratio of a circumferential speed of said roller means to that of the rotatable image carrying member.
Claim 3
Dependent Claim
18 words
An apparatus according to claim 1, wherein the developing agent has a fluidity of 0.2 to 3.0 g.
Claim 4
Dependent Claim
23 words
An apparatus according to claim 1, wherein the developing agent on the roller means has a charge quantity of 4 to 20 μc/g.
Claim 5
Dependent Claim
19 words
An apparatus according to claim 1, wherein the developing agent has a particle size of 5 to 13 μm.
Claim 6
Dependent Claim
28 words
An apparatus according to claim 1, wherein the amount of the developing agent deposited per unit area on said roller means is 0.3 to 0.8 mg/cm 2 .
Claim 7
Dependent Claim
28 words
An apparatus according to claim 1, wherein a ratio of a circumferential speed of the roller means to that of the image carrying member is 1.2 to 3.0.
Claim 8
Dependent Claim
26 words
An apparatus according to claim 1, wherein a voltage to be applied to the roller means is controlled in a range of 250 to 320 V.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |