Patent US3958878A successfully refreshed from Google Patents.
US3958878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic processor having interchangable reservoirs for supplying and reclaiming toner
Assignee: Xerox Corp
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Filing: 1974-11-20
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Granted: 1976-05-25
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Expires: 1994-11-20
Abstract
Abstract A toner dispenser for a development system of an electrostatic processor has a removable reservoir which mates with a collar on a pivotally mounted hopper containing a dispensing roll. The reservoir may be slid into or out of the collar while upright, but after it is mounted the hopper is rotated to invert the reservoir so that there then is a gravitational flow of toner to the dispensing roll. Advantageously, the processor has two identically configured reservoirs, one for the toner dispenser as described above and the other for collecting the residual toner recovered at a cleaning station. In that event, the residual toner can be reclaimed simply by using the latter reservoir as a replacement for the former one.
Inventors
- 👤 Richard E. Smith
- 👤 Herbert L. Bresnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:50
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0822; G03G15/0865; G03G15/0867; G03G15/0868; G03G2215/00; G03G2215/06; G03G2215/066; G03G2215/0663; G03G2215/0673; G03G2215/0678; G03G2215/0685
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
218 words
An electrostatic processor comprising a photoconductively coated substrate, a development system for applying toner to latent electrostatic images carried by said substrate, a toner dispensing arrangement for resupplying toner to said development system comprising a hopper having an inlet opening and an outlet opening, means for pivotally mounting said hopper for movement between a toner dispensing position and a toner loading position, dispensing control means mounted in said hopper intermediate said inlet and outlet openings for preventing the passage of toner through said hopper when in a first condition and for permitting the passage of toner, on demand, through said hopper when in a second condition, a first container for storing a supply of toner, said first container having a discharge port, and coupling means for attaching said first container to said hopper so that toner may flow from said container into said inlet opening when said hopper is in the toner dispensing position and may flow away from said discharge opening when said hopper is in the toner loading position, whereby said first container may be attached and detached from said hopper without toner spillage, and a cleaning system for removing residual toner from said substrate, said cleaning system having a second container similar to said first container for collecting said residual toner, said containers being interchangable.
Claim 2
Dependent Claim
218 words
An electrostatic processor comprising a photoconductively coated substrate, a development system for applying toner to latent electrostatic images carried by said substrate, a toner dispensing arrangement for resupplying toner to said development system comprising a hopper having an inlet opening and an outlet opening, means for pivotally mounting said hopper for movement between a toner dispensing position and a toner loading position, dispensing control means mounted in said hopper intermediate said inlet and outlet openings for preventing the passage of toner through said hopper when in a first condition and for permitting the passage of toner, on demand, through said hopper when in a second condition, a first container for storing a supply of toner, said first container having a discharge port, and coupling means for attaching said first container to said hopper so that toner may flow from said container into said inlet opening when said hopper is in the toner dispensing position and may flow away from said discharge opening when said hopper is in the toner loading position, whereby said first container may be attached and detached from said hopper without toner spillage, and a cleaning system for removing residual toner from said substrate, said cleaning system having a second container similar to said first container for collecting said residual toner, said containers being interchangable.
Claim 3
Dependent Claim
18 words
The combination recited in claim 1 wherein said coupling means comprises mating formations on said container and hopper.
Claim 4
Dependent Claim
51 words
The combination recited in claim 2 wherein said container has a portion of predetermined contour associated with said discharge port, and said hopper includes a collar conforming to said contour, whereby said container is mounted on and removed from said hopper by sliding said portion into and out of said collar.
Claim 5
Dependent Claim
44 words
The combination recited in claim 3 wherein movement of said hopper to said toner dispensing position places said dispensing control means in said second condition and movement of said hopper to said toner loading position places said dispensing control means in said first condition.
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) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |