US3679302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for reproducing printed material
Assignee: GAVIN GALE BORDEN
•
Filing: 1970-02-26
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Granted: 1972-07-25
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Expires: 1990-02-26
Abstract
Abstract A method of reproducing printed material such as old and rare books, manuscripts and the like whereby a considerable savings in cost over known reprint methods is achieved. The reprints are of outstanding quality and are produced at a significantly higher rate than known methods. The process involves the use of an electrostatic copying machine utilizing roll paper, the copying machine having two fusing steps and a brushing step. The latter results in the virtual elimination of the random toner particles on the paper after the first fusing step has been achieved. Thus, a high contrast reproduction print is the result of the present process.
Inventors
- 👤 Frederic G Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:20
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A method of reproducing pages of bound books comprising holding substantially complete pages, including gutter portions thereof, flat for uniform illumination of their surfaces, microfilming the flat surfaces with illumination and light filtration selected for proper light contrast on the flat surfaces, electrostatically photocopying the resulting microfilm to produce images of the flat surfaces on print paper, heat fusing the so produced images at a radiant energy level just high enough to fuse the images but not high enough to fuse the random toner particles, removing such random toner particles, and finally heat fusing said images on said paper by raising the radiant energy level higher than that employed in the first heat fusing step.
Claim 2
Independent Claim
115 words
A method of reproducing pages of bound books comprising holding substantially complete pages, including gutter portions thereof, flat for uniform illumination of their surfaces, microfilming the flat surfaces with illumination and light filtration selected for proper light contrast on the flat surfaces, electrostatically photocopying the resulting microfilm to produce images of the flat surfaces on print paper, heat fusing the so produced images at a radiant energy level just high enough to fuse the images but not high enough to fuse the random toner particles, removing such random toner particles, and finally heat fusing said images on said paper by raising the radiant energy level higher than that employed in the first heat fusing step.
Claim 3
Dependent Claim
16 words
A method as claimed in claim 1 further comprising measuring the exposure required for said microfilming.
Claim 4
Dependent Claim
36 words
A method as claimed in claim 1, wherein said paper is a clay coated paper that is heat resistant and remains white after being exposed to the amount of radiant heat necessary to fuse the image.
Claim 5
Dependent Claim
24 words
A method as claimed in claim 1 further including circulating air onto the print paper while producing said images, for maintaining the paper cool.
Claim 6
Dependent Claim
107 words
In a photocopy device working on the Xerographic principle and using a paper supply, a first fuser having its radiant energy level set high enough to fuse the image on the paper but not high enough to fuse the random toner particles, a pair of paper drive rollers for driving said paper, a rotatable brush located in the device after the path of movement of the paper through said first fuser and said drive rollers to clean off the unfused random toner particles, and a second fuser having a higher radiant energy level than said first fuser in order to completely fix said image on said paper.
Claim 7
Dependent Claim
107 words
In a photocopy device working on the Xerographic principle and using a paper supply, a first fuser having its radiant energy level set high enough to fuse the image on the paper but not high enough to fuse the random toner particles, a pair of paper drive rollers for driving said paper, a rotatable brush located in the device after the path of movement of the paper through said first fuser and said drive rollers to clean off the unfused random toner particles, and a second fuser having a higher radiant energy level than said first fuser in order to completely fix said image on said paper.
Claim 8
Dependent Claim
31 words
The combination set forth in claim 5 wherein one of said drive rollers has an exterior surface of rubber while the other drive roller has an exterior surface of stainless steel.
Claim 9
Dependent Claim
24 words
The combination set forth in claim 6 further including a fan blower located adjacent to said paper drive rollers whereby said rollers are cooled.
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |