Patent US5027744A successfully refreshed from Google Patents.
US5027744A
Expired / Lapsed
US
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Developing device with development electrode cleaning unit
Assignee: Brother Industries Ltd
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Filing: 1989-12-04
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Granted: 1991-07-02
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Expires: 2009-12-04
Abstract
Abstract A developing device which utilizes a development solution having toner particles actuated in the electric field generated by an electromember is provided with a cleaning unit to remove excess toner particles from the surface of the electrode member. The unit includes an air blower which directs air onto the electrode member and blows excess developing solution off the electrode.
Inventors
- 👤 Hiroshi Miyashita
- 👤 Masahiko Kanehisa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:47
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
158 words
A developing device utilizing a developing solution including a plurality of toner particles and comprising at least one development electrode member for generating an electric field to propel said toner particles, said developing device further comprising: means including a drum rotating at a predetermined velocity for supporting a material on which said toner particles are to be coated on a circumferential surface thereof and feeding said material into said electric field generated by said electrode member, said drum having a predetermined positional relationship with said development electrode member; and blow means provided within said drum member and having a slit portion provided on said drum member, at a downstream side of said material in a rotating direction, through which the air from said blow member is blown out to a surface of said development electrode member after said material is coated with said toner particles having been actuated in the electric field generated by said development electrode member.
Claim 2
Dependent Claim
158 words
A developing device utilizing a developing solution including a plurality of toner particles and comprising at least one development electrode member for generating an electric field to propel said toner particles, said developing device further comprising: means including a drum rotating at a predetermined velocity for supporting a material on which said toner particles are to be coated on a circumferential surface thereof and feeding said material into said electric field generated by said electrode member, said drum having a predetermined positional relationship with said development electrode member; and blow means provided within said drum member and having a slit portion provided on said drum member, at a downstream side of said material in a rotating direction, through which the air from said blow member is blown out to a surface of said development electrode member after said material is coated with said toner particles having been actuated in the electric field generated by said development electrode member.
Claim 3
Dependent Claim
29 words
The developing device according to claim 1 wherein at least a part of said slit portion is provided perpendicularly to a direction along which said drum member is rotated.
Claim 4
Dependent Claim
45 words
The developing device according to claim 2 wherein a main portion of said slit portion is provided perpendicularly to said direction, while at least one edge portion integral with said main portion is provided in an inclined state with a predetermined angle against said direction.
Claim 5
Dependent Claim
20 words
The developing device according to claim 3 wherein said inclined portion of said slit portion is bent to said direction.
Claim 6
Dependent Claim
29 words
The developing device according to claim 3 wherein the other portion integral with said main portion is provided in an inclined state with said predetermined angle against said direction.
Claim 7
Dependent Claim
30 words
The developing device according to claim 2 wherein a length of said slit portion perpendicular to said direction is longer than a length of width of said development electrode member.
Claim 8
Dependent Claim
129 words
A developing process utilizing a developing solution including a plurality of toner particles and at least one development electrode member for developing an electric field to propel said toner particles, which comprises: locating a a sheet member supported on a circumferential surface of a drum member rotating at a predetermined velocity on which said toner particles is to be coated, at a predetermined positional relationship with said development electrode member; coating said toner particles propelled by said development electrode member on said material in accordance with a desired image; and blowing an air to a surface of said development electrode member, said air being generated by a blow member provided within said drum member and passed through a slit portion provided on the circumferential surface of said drum member.
Claim 9
Dependent Claim
129 words
A developing process utilizing a developing solution including a plurality of toner particles and at least one development electrode member for developing an electric field to propel said toner particles, which comprises: locating a a sheet member supported on a circumferential surface of a drum member rotating at a predetermined velocity on which said toner particles is to be coated, at a predetermined positional relationship with said development electrode member; coating said toner particles propelled by said development electrode member on said material in accordance with a desired image; and blowing an air to a surface of said development electrode member, said air being generated by a blow member provided within said drum member and passed through a slit portion provided on the circumferential surface of said drum member.
Claim 10
Dependent Claim
29 words
The developing process according to claim 7 wherein at least a part of said slit portion is provided perpendicularly to a direction along which said drum member is rotated.
Claim 11
Dependent Claim
45 words
The developing process according to claim 8 wherein a main portion of said slit portion is provided perpendicularly to said direction, while at least one edge portion integral with said main portion is provided in an inclined state with a predetermined angle against said direction.
Claim 12
Dependent Claim
20 words
The developing process according to claim 9 wherein said inclined portion of said slit portion is bent to said direction.
Claim 13
Dependent Claim
30 words
The developing process according to claim 9 wherein the other edge portion integral with said main portion is provided in an inclined state with said predetermined angle against said direction.
Claim 14
Dependent Claim
30 words
The developing process according to claim 8 wherein a length of said slit portion perpendicular to said direction is longer than a length of width of said development electrode member.
Claim 15
Dependent Claim
141 words
A development electrode cleaning unit, adapted to be positioned in a developing device having a support member movable in a predetermined direction for supporting a material on which a developing operation is executed and utilizing a liquid development solution including toner particles and at least one development electrode member for generating an electric field in which said toner particles are propelled said unit comprising a blow member for blowing air to a surface of said development electrode member after the developing operation through a slit portion provided on said support member, said slit portion being provided in such a manner that a main portion of said slit portion on said surface of said supporting member is perpendicular to said predetermined direction, while at least one edge portion of said slit portion is inclined at a predetermined angle against said predetermined direction.
Claim 16
Dependent Claim
141 words
A development electrode cleaning unit, adapted to be positioned in a developing device having a support member movable in a predetermined direction for supporting a material on which a developing operation is executed and utilizing a liquid development solution including toner particles and at least one development electrode member for generating an electric field in which said toner particles are propelled said unit comprising a blow member for blowing air to a surface of said development electrode member after the developing operation through a slit portion provided on said support member, said slit portion being provided in such a manner that a main portion of said slit portion on said surface of said supporting member is perpendicular to said predetermined direction, while at least one edge portion of said slit portion is inclined at a predetermined angle against said predetermined direction.
Claim 17
Dependent Claim
23 words
The development electrode cleaning unit according to claim 13 wherein said inclined portion of said slit portion is bent to said predetermined direction.
Claim 18
Dependent Claim
33 words
The development electrode cleaning unit according to claim 13 wherein the other edge portion integral with said main portion is provided in an inclined state with said predetermined angle against said predetermined direction.
Claim 19
Dependent Claim
32 words
The development electrode cleaning unit according to claim 13 wherein a length of said slit portion perpendicular to said direction is longer than a length of width of said development electrode 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) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |