US3654901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner reclaiming system
Assignee: Xerox Corp
•
Filing: 1969-08-06
•
Granted: 1972-04-11
•
Expires: 1989-08-06
Abstract
Abstract A toner powder reclaiming apparatus for use with the developing system of an electrostatic reproduction machine including a rotating drum in the path of movement of an air flow containing electrically charged toner particles which become attracted to the drum. Means such as carrier beads are brought into contact with the drum for cleaning the toner off the collecting surface thereon. After the toner particles become triboelectrically attracted to the carrier beads, they are directed automatically into the developing system for the machine.
Inventors
- 👤 James M Donohue
- 👤 Dennis P Gerbasi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:53
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/10; G03G21/105
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
In an electrostatic reproduction machine having an electrostatic insulating plate upon which is formed an electrostatic latent image, a developing apparatus for applying developing material to the latent image for developing the same, the material comprising granular carrier particles and toner particles triboelectrically attractable to the toner particles, and a cleaning mechanism for removing excess toner particles from the plate after development of the latent image, the improvement comprising collecting means adapted to receive the excess toner particles from the cleaning mechanism, means associated with said collecting means for combining the excess toner particles with carrier particles, and means for automatically transporting the combined particles into the developing apparatus for reuse thereby.
Claim 2
Dependent Claim
112 words
In an electrostatic reproduction machine having an electrostatic insulating plate upon which is formed an electrostatic latent image, a developing apparatus for applying developing material to the latent image for developing the same, the material comprising granular carrier particles and toner particles triboelectrically attractable to the toner particles, and a cleaning mechanism for removing excess toner particles from the plate after development of the latent image, the improvement comprising collecting means adapted to receive the excess toner particles from the cleaning mechanism, means associated with said collecting means for combining the excess toner particles with carrier particles, and means for automatically transporting the combined particles into the developing apparatus for reuse thereby.
Claim 3
Dependent Claim
22 words
The improvement of claim 1 wherein said collecting means includes a housing connected with the cleaning mechanism, and a movable collecting surface.
Claim 4
Dependent Claim
40 words
The improvement of claim 1 wherein said means for combining excess toner particles with carrier particles includes means for placing an electrostatic charge on the toner particles and conveying means for directing carrier particles into contact with the charged particles.
Claim 5
Dependent Claim
156 words
A particle reclaiming system for use in a machine having a working zone to which particles are supplied in excess of quantities needed and from where some of the excess particles are removed therefrom including, a collecting surface adapted for movement through first and second spaces, means for receiving the particles to be removed and for conveying the same into said first space for contacting said surface, means for electrically charging the particles while in said first space for impressing an electrostatic charge thereon different from the electrostatic charge on said surface to which charged particles are attracted and adhere during movement thereof, mEans for conveying granular material into contact with the surface for separating the particles from the surface in said second space, said granular material being electrostatically attracted to the charged particles for carrying the same away from the surface and, means for returning the removed particles to the working zone for reuse therein.
Claim 6
Dependent Claim
18 words
The reclaiming system of claim 4 wherein the collecting surface is in the form of a rotating drum.
References Cited (Backward Citations)
US3405682A
Cited
US3370529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |