US5032485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing method for one-component developer
Assignee: Canon Inc
•
Filing: 1990-06-27
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Granted: 1991-07-16
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Expires: 2010-06-27
Abstract
Abstract This specification discloses a method of toner transfer development in which a low frequency alternating electrical bias is applied to the space between a latent image bearing member and a developer carrying member to develop the latent image on the latent image bearing member, and an apparatus for carrying out the same method. This bias has a first process in which reciprocal movement of developer particles is effected also between the non-image area of the latent image bearing member and the developer carrying member, and a second process in which the intensity of the bias is adjusted so that one-sided movement of developer particles from the developer carrying member to the image ara and one-sided movement of developer particles from the non-image area to the developer carrying member may take place.
Inventors
- 👤 Junichiro Kanbe
- 👤 Tsutomu Toyono
- 👤 Nagao Hosono
- 👤 Tohru Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:27
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0914; G01; G01D; G01D15/00; G01D15/16; G01D15/18; G03G15/065; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/104
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
92 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying to a developer carrying member a one-component developer to which silica particles are added; triboelectrically charging the one-component developer by friction with the developer carrying member; facing, at a developing position, the developer carrying member toward the image bearing member with a gap larger than a thickness of a layer of the one component developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 2
Independent Claim
92 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying to a developer carrying member a one-component developer to which silica particles are added; triboelectrically charging the one-component developer by friction with the developer carrying member; facing, at a developing position, the developer carrying member toward the image bearing member with a gap larger than a thickness of a layer of the one component developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 3
Independent Claim
100 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying to a developer carrying member a one-component developer to which silica particles are applied; regulating a thickness of a layer of the one-component developer by a regulating member in contact with the developer carrying member; facing, at a developing position, the developer carrying member toward the image bearing member with a gap larger than the thickness of the layer of the one-component developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 4
Independent Claim
100 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying to a developer carrying member a one-component developer to which silica particles are applied; regulating a thickness of a layer of the one-component developer by a regulating member in contact with the developer carrying member; facing, at a developing position, the developer carrying member toward the image bearing member with a gap larger than the thickness of the layer of the one-component developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 5
Dependent Claim
14 words
A method according to claim 2, wherein said regulating member includes an elastic member.
Claim 6
Dependent Claim
16 words
A method according to claim 2 or 3, wherein said developer is a one-component non-magnetic developer.
Claim 7
Independent Claim
103 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying a one-component magnetic developer, to which silica particles are added, to a non-magnetic rotatable developer carrying member; regulating a thickness of a layer of the one-component magnetic developer by a magnetic member disposed close to the rotatable member; facing, at a developing position, the developer carrying member toward the image bearing member with a gap larger than the thickness of the layer of the one-component developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 8
Independent Claim
103 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying a one-component magnetic developer, to which silica particles are added, to a non-magnetic rotatable developer carrying member; regulating a thickness of a layer of the one-component magnetic developer by a magnetic member disposed close to the rotatable member; facing, at a developing position, the developer carrying member toward the image bearing member with a gap larger than the thickness of the layer of the one-component developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 9
Independent Claim
97 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying to a developer carrying member a dry developer to which silica particles are added; regulating a thickness of a layer of the developer by regulating member in contact with the developer carrying member; facing, at a developing position, the developer carrying member toward the image bearing member with a gap larger than the thickness of the layer of the developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 10
Independent Claim
97 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying to a developer carrying member a dry developer to which silica particles are added; regulating a thickness of a layer of the developer by regulating member in contact with the developer carrying member; facing, at a developing position, the developer carrying member toward the image bearing member with a gap larger than the thickness of the layer of the developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 11
Independent Claim
106 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying a dry developer containing magnetic particles, to which silica particles are added, to a non-magnetic rotatable developer carrying member containing a magnet therein; regulating a thickness of a layer of the developer by a magnetic member disposed close to the rotatable member; facing, at a developer position, the developer carrying member toward the image bearing member with a gap larger than the thickness of the layer of the developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 12
Independent Claim
106 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying a dry developer containing magnetic particles, to which silica particles are added, to a non-magnetic rotatable developer carrying member containing a magnet therein; regulating a thickness of a layer of the developer by a magnetic member disposed close to the rotatable member; facing, at a developer position, the developer carrying member toward the image bearing member with a gap larger than the thickness of the layer of the developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 13
Independent Claim
91 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying to a developer carrying member a dry developer to which silica particles are applied; regulating a thickness of a layer of the developer by a regulating member; facing, at a developing position, the developer carrying member toward the image bearing member with a gap larger than the thickness of the layer of the developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
Claim 14
Independent Claim
91 words
A method of developing an electrostatic latent image formed on an image bearing member, comprising: supplying to a developer carrying member a dry developer to which silica particles are applied; regulating a thickness of a layer of the developer by a regulating member; facing, at a developing position, the developer carrying member toward the image bearing member with a gap larger than the thickness of the layer of the developer on the developer carrying member; and forming an alternating electric field in the developing position to develop the electrostatic latent image.
References Cited (Backward Citations)
US2838997A
Cited
US2839400A
Cited
US2758525A
Cited
US2803177A
Cited
US2862816A
Cited
US2996400A
Cited
US3346475A
Cited
US3232190A
Cited
US3639245A
Cited
US3643629A
Cited
US3720617A
Cited
US3731146A
Cited
US3703157A
Cited
JPS4838735A
Cited
US3818864A
Cited
JPS4917739A
Cited
GB1431699A
Cited
US3918966A
Cited
US3890929A
Cited
US3866574A
Cited
US3893418A
Cited
US4126100A
Cited
US4011834A
Cited
US4014291A
Cited
US4076857A
Cited
GB1549133A
Cited
US4121931A
Cited
US4102305A
Cited
US4292387A
Cited
US4473627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |