Patent US4197568A successfully refreshed from Google Patents.
US4197568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corona generating apparatus
Assignee: Konica Minolta Inc
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Filing: 1978-06-15
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Granted: 1980-04-08
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Expires: 1998-06-15
Abstract
Abstract A corona generating apparatus for use in an electrophotographic copying machine is disclosed, which includes an elongated shield of a conductive net member defining an open ended chamber and a corona discharge electrode mounted in the chamber. The conductive net may be backed by a conventional conductive shield plate.
Inventors
- 👤 Shigeru Inowa
- 👤 Katsuhiro Syukuri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:32
CPC Classifications
H; H01; H01T; H01T19/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
47 words
In an electrophotographic copying machine, a corona generating apparatus comprising an elongated shield of a substantially conductive net member defining a latticework and shaped to form an open-ended chamber, said open end facing a photoconductive surface, and at least one corona discharge electrode mounted in said chamber.
Claim 2
Dependent Claim
47 words
In an electrophotographic copying machine, a corona generating apparatus comprising an elongated shield of a substantially conductive net member defining a latticework and shaped to form an open-ended chamber, said open end facing a photoconductive surface, and at least one corona discharge electrode mounted in said chamber.
Claim 3
Dependent Claim
52 words
A corona generating apparatus comprising: a metal plate member defining an open-ended chamber; a shield of substantially conductive net member lining the entire chamber and defining a latticework, said shield having an opening concurrent with the opening of said chamber; and at least one corona discharge electrode mounted within the net-lined chamber.
Claim 4
Dependent Claim
52 words
A corona generating apparatus comprising: a metal plate member defining an open-ended chamber; a shield of substantially conductive net member lining the entire chamber and defining a latticework, said shield having an opening concurrent with the opening of said chamber; and at least one corona discharge electrode mounted within the net-lined chamber.
Claim 5
Dependent Claim
37 words
A corona generating apparatus as claimed in claim 2, wherein said plate member has a plurality of openings so that air in said chamber may be emitted from the apparatus through said net member and said openings.
Claim 6
Dependent Claim
65 words
A corona generating apparatus as claimed in claim 3, further comprising a cover member mounted on said plate member to entirely cover the openings of said plate member and to define a space therebetween, said space being provided with an air outlet port so that air in said chamber may be exhausted from the apparatus through said net member, said space and said outlet port.
Claim 7
Dependent Claim
26 words
The corona generating apparatus as defined by claim 1, 2, 3 or 4, wherein said net member has a mesh size of from 20 to 200-mesh.
Claim 8
Dependent Claim
18 words
A corona generating apparatus as claimed in claim 5, wherein said net member is formed of stainless steel.
Claim 9
Dependent Claim
28 words
The apparatus of claim 1 or 2 wherein said net member is an open-mesh metal wire screen, a screen sheer of carbon fiber or a perforated metallic sheet.
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) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |