Patent US4750015A successfully refreshed from Google Patents.
US4750015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste toner container detector
Assignee: Sharp Corp
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Filing: 1986-12-23
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Granted: 1988-06-07
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Expires: 2006-12-23
Abstract
Abstract A detector mechanism for detecting the condition when a waste toner container is full of waste toner. A piston is provided which moves in response to the waste toner pressure in the waste toner container, a shutter is provided in the path of light irradiating the photoreceptor so as to close or open the light path, and a wire is provided which is connected between the piston and the shutter and forces the shutter to move in the direction for closing the light path according to the piston movement when the toner container is full of waste toner.
Inventors
- 👤 Mitsuru Ogura
- 👤 Kenji Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:35
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/10; G03G21/12; G03G15/00; G03G15/04; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/043; G03G15/0435
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
A waste toner container detector mechanism for detecting when the waste toner container is full and stopping further copying of a copying machine comprising: a piston mounted in a waste toner container for storing waste toner particles collected from a photoreceptor surface, said piston moving in response to pressure exerted by said waste toner in said waste toner container; a shutter provided so as to be able to close or open a light path for exposing said photoreceptor; and a wire connected between said piston and said shutter, such that said wire causes said shutter to move in a direction for closing said light path in response to said piston movement.
Claim 2
Dependent Claim
111 words
A waste toner container detector mechanism for detecting when the waste toner container is full and stopping further copying of a copying machine comprising: a piston mounted in a waste toner container for storing waste toner particles collected from a photoreceptor surface, said piston moving in response to pressure exerted by said waste toner in said waste toner container; a shutter provided so as to be able to close or open a light path for exposing said photoreceptor; and a wire connected between said piston and said shutter, such that said wire causes said shutter to move in a direction for closing said light path in response to said piston movement.
Claim 3
Dependent Claim
26 words
The waste toner detector mechanism of claim 1, further including a biasing spring connected to said shutter conforming to the point of connection of said wire.
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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |