US5044310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing apparatus for non-magnetic developer
Assignee: Canon Inc
•
Filing: 1989-12-22
•
Granted: 1991-09-03
•
Expires: 2009-12-22
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 iamge area 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 19:45
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: 5
Claim 1
Independent Claim
129 words
A developing apparatus for developing a latent image formed on an image bearing member with a one-component non-magnetic developer, comprising: a container for containing the one-component non-magnetic developer to which silica particles are added; a rotatable developer carrying member for carrying the developer from said container toward the image bearing member; a regulating member for regulating the thickness of a layer of the developer applied on said developer carrying member, wherein said regulating member is in contact with said developer carrying member; and a member, in contact with said developer carrying member, for stirring and supplying the developer to said developer carrying member, said stirring and supplying member being disposed within said container upstream of said regulating member with respect to the movement direction of said developer carrying member.
Claim 2
Dependent Claim
129 words
A developing apparatus for developing a latent image formed on an image bearing member with a one-component non-magnetic developer, comprising: a container for containing the one-component non-magnetic developer to which silica particles are added; a rotatable developer carrying member for carrying the developer from said container toward the image bearing member; a regulating member for regulating the thickness of a layer of the developer applied on said developer carrying member, wherein said regulating member is in contact with said developer carrying member; and a member, in contact with said developer carrying member, for stirring and supplying the developer to said developer carrying member, said stirring and supplying member being disposed within said container upstream of said regulating member with respect to the movement direction of said developer carrying member.
Claim 3
Dependent Claim
16 words
An apparatus according to claim 1, wherein said stirring and supplying member includes a fur brush.
Claim 4
Dependent Claim
34 words
An apparatus according to claim 1, wherein said regulating member forms a layer of the developer having a thickness smaller than a minimum clearance between said image bearing member and said developer carrying member.
Claim 5
Dependent Claim
34 words
An apparatus according to claim 2, wherein said regulating member forms a layer of the developer having a thickness smaller than a minimum clearance between said image bearing member and said developer carrying member.
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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) | 1994-09-02 | 1995-03-04 | 1995-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-02 | 1999-03-04 | 1999-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-02 | 2003-03-04 | 2003-09-03 | $7700.00 | Window Closed / Lapsed |