Patent US3851966A successfully refreshed from Google Patents.
US3851966A
Expired / Lapsed
US
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Reproduction apparatus
Assignee: Xerox Corp
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Filing: 1972-12-11
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Granted: 1974-12-03
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Expires: 1992-12-11
Abstract
Abstract A xerographic reproduction machine having control means to provide a programmed shutdown of the machine in the event of a malfunction therein.
Inventors
- 👤 E Reehil
- 👤 E Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G13/00; G03G13/06; G03G13/08; G03G13/22; G03G15/14; G03G15/16; G03G2215/00; G03G2215/00362; G03G2215/00367; G03G2215/00405; G03G2215/00535; G03G2215/00548; G03G2215/00603
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
173 words
In a reproduction machine adapted for making copies of an original through a plurality of process steps including exposure of the original to form a latent electrostatic image of the original on a photoconductive surface, developing the image to provide a toner image of the original on the photoconductive surface, providing an electrical bias on the copy paper and holding the copy paper against the toner image by means of an electrically biased transfer roller to transfer the toner image to the copy paper, a method to minimize toner consumption and toner contamination of the machine comprising the steps of: continuously energizing the transfer roller and maintaining the transfer roller in contact with the photoconductive surface during a normal copy run; removing the electrical bias on the transfer roller moving the transfer roller away from the photoconductive surface in the event of a paper misfeed to prevent transfer of toner to the roller; and, de-energizing the developer to prevent development of latent electrostatic images passing by the developer subsequent to a paper misfeed.
Claim 2
Dependent Claim
173 words
In a reproduction machine adapted for making copies of an original through a plurality of process steps including exposure of the original to form a latent electrostatic image of the original on a photoconductive surface, developing the image to provide a toner image of the original on the photoconductive surface, providing an electrical bias on the copy paper and holding the copy paper against the toner image by means of an electrically biased transfer roller to transfer the toner image to the copy paper, a method to minimize toner consumption and toner contamination of the machine comprising the steps of: continuously energizing the transfer roller and maintaining the transfer roller in contact with the photoconductive surface during a normal copy run; removing the electrical bias on the transfer roller moving the transfer roller away from the photoconductive surface in the event of a paper misfeed to prevent transfer of toner to the roller; and, de-energizing the developer to prevent development of latent electrostatic images passing by the developer subsequent to a paper misfeed.
Claim 3
Dependent Claim
49 words
A method to minimize toner consumption and toner contamination of a reproduction machine according to claim 1 further including a step of discharging the latent electrostatic images on the photoconductive surface before the imaged areas reach the developer to prevent development thereof in the event of a paper misfeed.
Claim 4
Dependent Claim
142 words
In a reproduction machine adapted for making copies of an original through a plurality of process steps including exposure of the original to form a latent electrostatic image of the original on a photoconductive surface, developing the image to provide a toner image of the original on the photoconductive surface, and holding the copy paper against the toner image by suitable holding means adapted for continuous contact with the photoconductive surface during normal machine operation to transfer the toner image to the copy paper, a method to minimize toner consumption and toner contamination of the machine comprising the steps of: moving the holding means away from the photoconductive surface in the event of a paper misfeed to prevent transfer of toner thereto and discharging latent image areas on the photoconductive surface in the event of a paper misfeed to prevent development thereof.
Claim 5
Dependent Claim
142 words
In a reproduction machine adapted for making copies of an original through a plurality of process steps including exposure of the original to form a latent electrostatic image of the original on a photoconductive surface, developing the image to provide a toner image of the original on the photoconductive surface, and holding the copy paper against the toner image by suitable holding means adapted for continuous contact with the photoconductive surface during normal machine operation to transfer the toner image to the copy paper, a method to minimize toner consumption and toner contamination of the machine comprising the steps of: moving the holding means away from the photoconductive surface in the event of a paper misfeed to prevent transfer of toner thereto and discharging latent image areas on the photoconductive surface in the event of a paper misfeed to prevent development thereof.
Claim 6
Dependent Claim
35 words
A method to minimize toner consumption and toner contamination of the machine according to claim 3 further including the step of preventing development of the imaged areas that are not discharged by de-energizing the developer.
Claim 7
Dependent Claim
109 words
In a reproduction machine adapted for making copies of an original through a plurality of process steps including exposure of the original to form a latent electrostatic image of the original on a photoconductive surface, developing the image to provide a toner image of the original on the photoconductive surface, and transferring the toner image to a copy paper, a method to minimize toner consumption and toner contamination of the machine comprising the steps of; discharging a portion of the latent imaged areas on the photoconductive surface in the event of a paper misfeed and preventing development of undischarged imaged areas on the photoconductive surface by de-energizing the developer.
Claim 8
Dependent Claim
109 words
In a reproduction machine adapted for making copies of an original through a plurality of process steps including exposure of the original to form a latent electrostatic image of the original on a photoconductive surface, developing the image to provide a toner image of the original on the photoconductive surface, and transferring the toner image to a copy paper, a method to minimize toner consumption and toner contamination of the machine comprising the steps of; discharging a portion of the latent imaged areas on the photoconductive surface in the event of a paper misfeed and preventing development of undischarged imaged areas on the photoconductive surface by de-energizing the developer.
Claim 9
Independent Claim
119 words
A method for automatically producing copies of an original comprising the steps of; providing an electrostatic charge pattern of the original on a photoconductive surface; developing the charge pattern wit an electrically attractable powder as the charge pattern on the photoconductive surface passes a developer station to provide a powder image on the photoconductiVe surface in conformity with the original; supplying sheets of copy paper to the photoconductive surface in synchronism with the developed image thereon for contact with the image to transfer the powder image to the copy paper; and, discharging the electrostatic charge pattern in the event of a paper misfeed to prevent development of the charge pattern as the photoconductive surface moves past the developer station.
Claim 10
Independent Claim
119 words
A method for automatically producing copies of an original comprising the steps of; providing an electrostatic charge pattern of the original on a photoconductive surface; developing the charge pattern wit an electrically attractable powder as the charge pattern on the photoconductive surface passes a developer station to provide a powder image on the photoconductiVe surface in conformity with the original; supplying sheets of copy paper to the photoconductive surface in synchronism with the developed image thereon for contact with the image to transfer the powder image to the copy paper; and, discharging the electrostatic charge pattern in the event of a paper misfeed to prevent development of the charge pattern as the photoconductive surface moves past the developer station.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |