Patent US4763998A successfully refreshed from Google Patents.
Patent US3875407A successfully refreshed from Google Patents.
US3875407A
Expired / Lapsed
US
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Corona generator cleaning apparatus
Assignee: Xerox Corp
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Filing: 1974-01-16
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Granted: 1975-04-01
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Expires: 1994-01-16
Abstract
Abstract A corona generating apparatus in which the electrode and grid are cleaned to remove particle contamination therefrom. The cleaning device flexes and scrapes the grid while substantially simultaneously therewith wiping the electrode to remove contaminants adhering to either of the foregoing. This maintains the electrical characteristics of the corona generating apparatus substantially constant eliminating any variations introduced by the accumulation of contaminating particles on the grid or electrode. The foregoing abstract is neither intended to define the invention disclosed in the specification, nor is it intended to be limiting as to the scope of the invention in any way.
Inventors
- 👤 Thomas F Hayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:07
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0258; G03G15/0291
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
97 words
A corona generating apparatus, including: a shield defining an elongated open ended chamber; grid means disposed in the open end of said shield extending substantially in a longitudinal direction along the length of said shield; electrode means interposed between said shield and said grid means; and means for cleaning said electrode means and said grid means, said cleaning means having a first portion engaging said grid means to flex said grid means loosening particles adhering thereto and scraping the loosened particles therefrom, said cleaning means having a second portion engaging said electrode means to wipe particles therefrom.
Claim 2
Dependent Claim
97 words
A corona generating apparatus, including: a shield defining an elongated open ended chamber; grid means disposed in the open end of said shield extending substantially in a longitudinal direction along the length of said shield; electrode means interposed between said shield and said grid means; and means for cleaning said electrode means and said grid means, said cleaning means having a first portion engaging said grid means to flex said grid means loosening particles adhering thereto and scraping the loosened particles therefrom, said cleaning means having a second portion engaging said electrode means to wipe particles therefrom.
Claim 3
Dependent Claim
43 words
An apparatus as recited in claim 1, further including: means for energizing said electrode means to generate a corona discharge therefrom; and means for applying a field regulating potential to said grid means for controlling the corona discharge generated by said electrode means.
Claim 4
Dependent Claim
88 words
An apparatus as recited in claim 2, wherein: said electrode means includes at least a pair of spaced substantially parallel conductive coronode wires extending substantially in a longitudinal direction along the length of said shield; and said grid means includes a plurality of spaced substantially parallel longitudinally extending grid wires mounted in said shield partially enclosing the open end thereof with one of said coronode wires being disposed therebeneath and the other of said coronode wires being disposed in the unenclosed portion of the chamber of said shield.
Claim 5
Dependent Claim
62 words
An apparatus as recited in claim 3, wherein the first portion of said cleaning means includes a scraping member having a first member with a plurality of open ended slots therein adapted to support said grid wires and a second member having a beveled edge arranged to engage the interior surface of said grid wires opposed from said pair of coronode wires.
Claim 6
Dependent Claim
29 words
An apparatus as recited in claim 4, further including means for moving said cleaning means along said pair of coronode wires and said grid wires to remove particles therefrom.
Claim 7
Dependent Claim
60 words
An apparatus as recited in claim 5, wherein said moving means includes: guide means affixed to at least one end portion of said shield; and a rod member secured to said cleaning means, said rod member being disposed in said guide means to reciprocate said cleaning means along the length of said pair of coronode wires and said grid wires.
Claim 8
Dependent Claim
16 words
An apparatus as recited in claim 6, wherein said shield includes a substantially U-shaped conductive housing.
Claim 9
Dependent Claim
126 words
An electrophotographic printing machine of the type having a photoconductive member adapted to be charged to a substantially uniform potential by a corona generating device, wherein the improvement in said corona generating device includes: a shield defining an elongated open ended chamber; grid means disposed in the open end of said chamber extending substantially in a longitudinal direction along the length of said shield; electrode means interposed between said shield and said grid means; and means for cleaning said electrode means and said grid means, said cleaning means having a first portion engaging said grid means to flex said grid means loosening particles adhering thereto and scraping the loosened particles therefrom, said cleaning means having a second portion engaging said electrode means to wipe paRticles therefrom.
Claim 10
Dependent Claim
126 words
An electrophotographic printing machine of the type having a photoconductive member adapted to be charged to a substantially uniform potential by a corona generating device, wherein the improvement in said corona generating device includes: a shield defining an elongated open ended chamber; grid means disposed in the open end of said chamber extending substantially in a longitudinal direction along the length of said shield; electrode means interposed between said shield and said grid means; and means for cleaning said electrode means and said grid means, said cleaning means having a first portion engaging said grid means to flex said grid means loosening particles adhering thereto and scraping the loosened particles therefrom, said cleaning means having a second portion engaging said electrode means to wipe paRticles therefrom.
Claim 11
Dependent Claim
44 words
A printing machine as recited in claim 8, further including: means for energizing said electrode means to generate a corona discharge therefrom; and means for applying a field regulating potential to said grid means for controlling the corona discharge generated by said electrode means.
Claim 12
Dependent Claim
89 words
A printing machine as recited in claim 9, wherein: said electrode means includes at least a pair of spaced substantially parallel conductive coronode wires extending substantially in a longitudinal direction along the length of said shield; and said grid means includes a plurality of spaced substantially parallel longitudinally extending grid wires mounted in said shield partially enclosing the open end thereof with one of said coronode wires being disposed therebeneath and the other of said coronode wires being disposed in the unenclosed portion of the chamber of said shield.
Claim 13
Dependent Claim
63 words
A printing machine as recited in claim 10, wherein the first portion of said cleaning means includes a scraping member having a first member with a plurality of open ended slots therein adapted to support said grid wires and a second member having a beveled edge arranged to engage the interior surface of said grid wires opposed from said pair of coronode wires.
Claim 14
Dependent Claim
30 words
A printing machine as recited in claim 11, further including means for moving said cleaning means along said pair of coronode wires and said grid wires to remove particles therefrom.
Claim 15
Dependent Claim
61 words
A printing machine as recited in claim 12, wherein said moving means includes: guide means affixed to at least one end portion of said shield; and a rod member secured to said scraping member, said rod member being disposed in said guide means to reciprocate said cleaning means along the length of said pair of coronode wires and said grid wires.
Claim 16
Dependent Claim
17 words
A printing machine as recited in claim 13, wherein said shield includes a substantially U-shaped conductive housing.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |