US3733127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous tone photocopier
Assignee: Dennison Manufacturing Co
•
Filing: 1970-08-14
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Granted: 1973-05-15
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Expires: 1990-08-14
Abstract
Abstract An electrostatic copier apparatus for reproducing continuous tone images which utilizes the effect of saturation, or near saturation, development of the latent electrostatic image by using in a preferred embodiment a two-speed motor which feeds the paper to the developer station at a first relatively fast rate of travel, feeds the paper through the developer station at a second relatively slow rate of travel to achieve such saturation, or near saturation, development, and thereupon feeds the paper from the developer station to the apparatus outlet at the first relatively high rate of travel to minimize the overall time spent in the reproduction process.
Inventors
- 👤 B Perlis
- 👤 A Mackenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:29
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
A copier apparatus for providing continuous tone copies of a record image comprising: means for supplying paper having a coating on which an electrostatic image is to be developed, said paper being a continuous tone paper; means for charging said coating on said paper; means for exposing said charged paper to a record image to be copied so as to form a latent electrostatic image corresponding to said record image thereon; means for developing said latent electrostatic image to form a fixed image on said paper; means for drying said developed paper and for delivering said developed paper to the outlet of said apparatus; two-speed motor means for feeding said paper at a first rate of travel from said supplying means through said charging means and said exposing means to said developing means and at a second rate of travel through said developing means, said second rate of travel always being relatively smaller than said first rate of travel for providing substantial saturation development of said image; and means for switching said motor speed from a first value which produces said first rate of travel to a second value which produces said second rate of travel substantially when said paper enters said developing means.
Claim 2
Dependent Claim
204 words
A copier apparatus for providing continuous tone copies of a record image comprising: means for supplying paper having a coating on which an electrostatic image is to be developed, said paper being a continuous tone paper; means for charging said coating on said paper; means for exposing said charged paper to a record image to be copied so as to form a latent electrostatic image corresponding to said record image thereon; means for developing said latent electrostatic image to form a fixed image on said paper; means for drying said developed paper and for delivering said developed paper to the outlet of said apparatus; two-speed motor means for feeding said paper at a first rate of travel from said supplying means through said charging means and said exposing means to said developing means and at a second rate of travel through said developing means, said second rate of travel always being relatively smaller than said first rate of travel for providing substantial saturation development of said image; and means for switching said motor speed from a first value which produces said first rate of travel to a second value which produces said second rate of travel substantially when said paper enters said developing means.
Claim 3
Dependent Claim
176 words
A copier apparatus for providing continuous tone copies of a record comprising: means for supplying paper having a coating on which an electrostatic image is to be developed, said paper being a continuous tone paper: means for exposing said charged paper to a record image to be copied so as to form a latent electrostatic image corresponding to said record image thereon; means for developing said latent electrostatic image to form a fixed image on said paper; means for drying said developed paper and for delivering said developed paper to the outlet of said apparatus; means for feeding said paper at a first rate of travel from said supplying means through said charging means and said exposing means to said developing means and at a second rate of travel through said developing means, said second ratE of travel always being relatively smaller than said first rate of travel for providing substantial saturation development of said image; and means for feeding said developed paper from said developing means to said outlet at said first rate of travel.
Claim 4
Dependent Claim
176 words
A copier apparatus for providing continuous tone copies of a record comprising: means for supplying paper having a coating on which an electrostatic image is to be developed, said paper being a continuous tone paper: means for exposing said charged paper to a record image to be copied so as to form a latent electrostatic image corresponding to said record image thereon; means for developing said latent electrostatic image to form a fixed image on said paper; means for drying said developed paper and for delivering said developed paper to the outlet of said apparatus; means for feeding said paper at a first rate of travel from said supplying means through said charging means and said exposing means to said developing means and at a second rate of travel through said developing means, said second ratE of travel always being relatively smaller than said first rate of travel for providing substantial saturation development of said image; and means for feeding said developed paper from said developing means to said outlet at said first rate of travel.
Claim 5
Dependent Claim
227 words
A copier apparatus for providing continuous tone copies of a record image comprising: means for supplying paper having a coating on which an electrostatic image is to be developed; means for charging said coating on said paper; means for exposing said charged paper to a record image to be copied so as to form a latent electrostatic image corresponding to said record image thereon; means for developing said latent electrostatic image to form a fixed image on said paper, said developing means including means for applying a liquid developing solution to said latent electrostatic image, said solution comprising toner concentrate in a carrier liquid, the concentration of said toner concentrate being within a range from about 15 to 20 cc per quart of carrier liquid; means for drying said developed paper and for delivering said developed paper to the outlet of said apparatus; and. means for feeding said paper at a first rate of travel from said supplying means through said charging means and said exposing means to said developing means and at a second rate of travel through said developing means, said first rate of travel being in a range from about 1.0 to about 7.0 inches per second and said second rate of travel being in a range from about 0.1 to about 1.5 incheres per second, thereby providing substantial saturation development of said image.
Claim 6
Dependent Claim
227 words
A copier apparatus for providing continuous tone copies of a record image comprising: means for supplying paper having a coating on which an electrostatic image is to be developed; means for charging said coating on said paper; means for exposing said charged paper to a record image to be copied so as to form a latent electrostatic image corresponding to said record image thereon; means for developing said latent electrostatic image to form a fixed image on said paper, said developing means including means for applying a liquid developing solution to said latent electrostatic image, said solution comprising toner concentrate in a carrier liquid, the concentration of said toner concentrate being within a range from about 15 to 20 cc per quart of carrier liquid; means for drying said developed paper and for delivering said developed paper to the outlet of said apparatus; and. means for feeding said paper at a first rate of travel from said supplying means through said charging means and said exposing means to said developing means and at a second rate of travel through said developing means, said first rate of travel being in a range from about 1.0 to about 7.0 inches per second and said second rate of travel being in a range from about 0.1 to about 1.5 incheres per second, thereby providing substantial saturation development of said image.
Claim 7
Dependent Claim
34 words
An apparatus in accordance with claim 1 and further including means for switching said motor speed from said second value to said first value substantially when said paper substantially entirely leaves said developing means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |