US4412736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collection of suspended toner particles
Assignee: Ricoh Co Ltd
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Filing: 1981-07-22
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Granted: 1983-11-01
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Expires: 2001-07-22
Abstract
Abstract Apparatus for collecting charged toner particles suspended in an air flow is provided. The present apparatus is particularly useful when used in combination with a fur brush cleaning device of a transfer type electrophotographic copying machine. The present collection apparatus comprises a roller electrode and a counter electrode disposed opposite to the peripheral surface of the roller electrode. A blade is provided in contact with the roller electrode. The roller electrode includes an insulating section which always keeps in contact with a portion of the blade thereby roller and counter electrodes are prevented from being bridged by deposited toner particles. A disposable filter unit may be advantageously mounted on the collection apparatus.
Inventors
- 👤 Koji Sakamoto
- 👤 Misao Tanzawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:01
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0035
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
112 words
Apparatus for collecting suspended, charged particles comprising: a support member; a roller electrode rotatably supported by said support member and including an electrically insulating section provided at least at a part of the peripheral surface of said roller electrode; a counter electrode disposed opposite to the peripheral surface of said roller electrode; a blade provided in contact with the peripheral surface of said roller electrode, said blade being also in contact with at least a part of said insulating section thereby preventing said roller and counter electrodes from being bridged through the particles deposited on said support member; and a high voltage source connected between said roller electrode and said counter electrode.
Claim 2
Dependent Claim
112 words
Apparatus for collecting suspended, charged particles comprising: a support member; a roller electrode rotatably supported by said support member and including an electrically insulating section provided at least at a part of the peripheral surface of said roller electrode; a counter electrode disposed opposite to the peripheral surface of said roller electrode; a blade provided in contact with the peripheral surface of said roller electrode, said blade being also in contact with at least a part of said insulating section thereby preventing said roller and counter electrodes from being bridged through the particles deposited on said support member; and a high voltage source connected between said roller electrode and said counter electrode.
Claim 3
Dependent Claim
48 words
The apparatus of claim 1 wherein said roller electrode includes an electrically conductive section and at least a pair of electrically insulating sections provided on respective ends of said conductive section and said blade is in contact with at least a part of each of said insulating sections.
Claim 4
Dependent Claim
26 words
The apparatus of claim 2 wherein the length of said conductive section along its axis is substantially the same as the width of said counter electrode.
Claim 5
Dependent Claim
24 words
The apparatus of claim 1 wherein said high voltage source applies a negative high voltage to said roller electrode with grounding said counter electrode.
Claim 6
Dependent Claim
11 words
The apparatus of claim 1 wherein said particles are toner particles.
Claim 7
Dependent Claim
90 words
Apparatus for collecting charged particles suspended in a gas flow comprising: a channel formed at least partially by electrically insulative portions for passing said gas flow with the suspension of charged particles; a pair of electrodes oppositely disposed in said channel; means for applying a high voltage between said electrodes; and means for removing at least a part of the particles deposited on electrically insulative portions of said channel so as to prevent said electrodes from being bridged through the particles deposited on said electrically insulative portions of said channel.
Claim 8
Dependent Claim
90 words
Apparatus for collecting charged particles suspended in a gas flow comprising: a channel formed at least partially by electrically insulative portions for passing said gas flow with the suspension of charged particles; a pair of electrodes oppositely disposed in said channel; means for applying a high voltage between said electrodes; and means for removing at least a part of the particles deposited on electrically insulative portions of said channel so as to prevent said electrodes from being bridged through the particles deposited on said electrically insulative portions of said channel.
Claim 9
Dependent Claim
44 words
The apparatus of claim 6 further comprising a filter unit detachably mounted at the outlet of said channel, said filter unit including a box member provided with an opening and a door portion, and a filter fixed to said opening of the box member.
Claim 10
Dependent Claim
37 words
The apparatus of claim 7 wherein said door portion has a tendency to keep a closed position and said door portion is forced to take an open position when said filter unit is mounted on said apparatus.
Claim 11
Dependent Claim
30 words
The apparatus of claim 6 further comprising a support member for supporting said pair of electrodes and said channel is defined by said support member and said pair of electrodes.
Claim 12
Dependent Claim
45 words
The apparatus of claim 9 wherein one of said pair of electrodes is a roller electrode rotatably supported by said support member and the other electrode is a counter electrode disposed opposite to the peripheral surface of said roller electrode with a predetermined distance therebetween.
Claim 13
Dependent Claim
20 words
The apparatus of claim 10 further comprising a blade disposed in contact with the peripheral surface of said roller electrode.
Claim 14
Dependent Claim
35 words
The apparatus of claim 11 wherein said means for removing includes an electrically insulating section provided on said roller electrode and said insulating section keeps contact with said blade even if said roller electrode rotates.
Claim 15
Dependent Claim
98 words
In an apparatus for collecting particles suspended in a flow of gas, comprising means including a channel for passing said flow of gas with the particles; and a filter unit detachably mounted at an outlet of said channel, said filter unit including a door portion having a tendency to be closed, and means provided in said apparatus to hold said door portion in an open position when said filter unit is mounted in place within said apparatus and to allow said door portion to move into a closed position when said filter unit is removed from said apparatus.
Claim 16
Dependent Claim
98 words
In an apparatus for collecting particles suspended in a flow of gas, comprising means including a channel for passing said flow of gas with the particles; and a filter unit detachably mounted at an outlet of said channel, said filter unit including a door portion having a tendency to be closed, and means provided in said apparatus to hold said door portion in an open position when said filter unit is mounted in place within said apparatus and to allow said door portion to move into a closed position when said filter unit is removed from said apparatus.
References Cited (Backward Citations)
US3955235A
Cited
US4319832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |