Patent US6193744B1 successfully refreshed from Google Patents.
US4043656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparency copying machine
Assignee: Xerox Corp
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Filing: 1976-03-03
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Granted: 1977-08-23
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Expires: 1996-03-03
Abstract
Abstract An electrophotographic printing machine in which a transparency or an opaque original document is reproduced. In reproducing a transparency, a mirror is pivoted from a position remote from the light image path into the path of the transparency light image. When an opaque original document is being reproduced, the mirror is pivoted to the position remote from the light image path.
Inventors
- 👤 Abraham Cherian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:19
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/60; G03G2215/00; G03G2215/00172; G03G2215/00177; G03G2215/00181; G03G2215/00185; G03G2215/00206; G03G2215/00261; G03G2215/00274
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
140 words
An electrophotographic printing machine for reproducing a transparency or an opaque original document, including: a receiving member; a photoconductive member; means for charging at least a portion of said photoconductive member to a substantially uniform level; means for projecting a light image of the transparency; means for modulating the light image of the transparency; and means for directing the light image of the transparency through said receiving member and said modulating means onto the charged portion of said photoconductive member selectively dissipating the charge thereon to record an electrostatic latent image thereof, said directing means being movable from a first position remote from the path of the transparency light image wherein the electrophotographic printing machine reproduces the opaque original document to a second position in the path of the transparency light image wherein the electrophotographic printing machine reproduces the transparency.
Claim 2
Dependent Claim
140 words
An electrophotographic printing machine for reproducing a transparency or an opaque original document, including: a receiving member; a photoconductive member; means for charging at least a portion of said photoconductive member to a substantially uniform level; means for projecting a light image of the transparency; means for modulating the light image of the transparency; and means for directing the light image of the transparency through said receiving member and said modulating means onto the charged portion of said photoconductive member selectively dissipating the charge thereon to record an electrostatic latent image thereof, said directing means being movable from a first position remote from the path of the transparency light image wherein the electrophotographic printing machine reproduces the opaque original document to a second position in the path of the transparency light image wherein the electrophotographic printing machine reproduces the transparency.
Claim 3
Dependent Claim
61 words
A printing machine as recited in claim 1, further including: a composition frame disposed on said receiving member; and means for exposing the charged portion of said photoconductive member to a light image of said composition frame recording thereon a combined electrostatic latent image comprising the electrostatic latent image of the transparency and the electrostatic latent image of said composition frame.
Claim 4
Dependent Claim
44 words
A printing machine as recited in claim 2, further including means for filtering the light image of the transparency to form a single color light image which irradiates the charged portion of said photoconductive member to record thereon a single color electrostatic latent image.
Claim 5
Dependent Claim
34 words
A printing machine as recited in claim 3, wherein said projecting means includes a slide projector arranged to project a light image of the transparency onto said directing means located in the second position.
Claim 6
Dependent Claim
39 words
A printing machine as recited in claim 4, wherein said receiving member includes: a transparent platen member having said composition frame disposed thereon; and a field lens mounted on said composition frame and arranged to converge diverging light rays.
Claim 7
Dependent Claim
24 words
A printing machine as recited in claim 5, wherein said modulating means includes a screen interposed between said field lens and said composition frame.
Claim 8
Dependent Claim
44 words
A printing machine as recited in claim 6 wherein said directing means includes: a frame supporting said slide projector; an arm having one end portion thereof mounted pivotably on said frame; and a mirror mounted rotatably on the other end portion of said arm.
Claim 9
Dependent Claim
47 words
A printing machine as recited in claim 7, wherein said exposing means includes: a light source arranged to illuminate said composition frame disposed on said receiving member; and lens means for receiving the light rays from the combined image of the color transparency and said composition frame.
Claim 10
Dependent Claim
71 words
A printing machine as recited in claim 8, wherein said filtering means includes: a red filter arranged to be interposed into the light image path to transmit a red light image therethrough; a blue filter arranged to be interposed into the light image path to transmit a blue light image therethrough; and a green filter arranged to be interposed into the light image path to transmit a green light image therethrough.
Claim 11
Dependent Claim
20 words
A printing machine as recited in claim 8, wherein said screen includes a plurality of spaced, soft gray square dots.
Claim 12
Dependent Claim
17 words
A printing machine as recited in claim 10, wherein said screen preferably includes 85 dots per inch.
Claim 13
Dependent Claim
18 words
A printing machine as recited in claim 8, wherein said field lens preferably includes 200 gratings per inch.
Claim 14
Dependent Claim
75 words
A printing machine as recited in claim 8, further including: means for developing the single color electrostatic latent image recorded on said photoconductive member with toner particles complementary in color to the single color light image; means for transferring the toner powder image adhering to the electrostatic latent image recorded on said photoconductive member to a sheet of support material; and means for permanently affixing the toner powder image to the sheet of support material.
References Cited (Backward Citations)
US3051044A
Cited
US3439983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |