Patent US4522487A successfully refreshed from Google Patents.
US4522487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device for electrostatic copying machine
Assignee: Toshiba Corp
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Filing: 1982-06-30
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Granted: 1985-06-11
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Expires: 2002-06-30
Abstract
Abstract A sealing roller for preventing toner particles from inadvertently soiling the inside of an electrostatic copying machine. The sealing roller is placed in rolling contact with the photoconductive surface and seals the gap between that surface and the residual particle cleaning device housing. Any particles that are not removed by the cleaning device are therefore prevented from escaping and soiling the machine.
Inventors
- 👤 Norio Misawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:00
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/10; G03G21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
In a cleaning device for removing residual toner particles from a photoconductive surface of an electrostatic copying machine, said cleaning device including a base plate, a toner particle removing device adjacent the base plate to remove residual particles from the photoconductive surface, a collecting roller rotatably supported in rolling contact with the photoconductive surface adjacent said toner particle removing device to transport toner particles removed from the photoconductive surface, and an enclosure, the improvement comprising: a sealing roller separate from said collecting roller rotatably provided on the front end of the base plate in rolling contact with the photoconductive surface to prevent the residual toner particles from escaping from said enclosure.
Claim 2
Dependent Claim
111 words
In a cleaning device for removing residual toner particles from a photoconductive surface of an electrostatic copying machine, said cleaning device including a base plate, a toner particle removing device adjacent the base plate to remove residual particles from the photoconductive surface, a collecting roller rotatably supported in rolling contact with the photoconductive surface adjacent said toner particle removing device to transport toner particles removed from the photoconductive surface, and an enclosure, the improvement comprising: a sealing roller separate from said collecting roller rotatably provided on the front end of the base plate in rolling contact with the photoconductive surface to prevent the residual toner particles from escaping from said enclosure.
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) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |