Patent US4160259A successfully refreshed from Google Patents.
Patent EP0059083A2 successfully refreshed from Google Patents.
EP0059083A2
Expired / Lapsed
EP
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Electrophotographic printing machine and method
Assignee: Xerox Corp
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Filing: 1982-02-19
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Granted: —
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Expires: 2002-02-19
Abstract
Abstract An electrophotographic printing machine of the type having a variable magnification optical system (17), which adjusts the size of indicia being reproduced on a copy sheet from a document. The magnification of the optical system (17), is controlled so as to reproduce the indicia of the document on the copy sheet. The machine includes means (38) for comparing the size of the surface area of the copy sheet with the surface area of the document and generating a signal indicative of the difference therebetween; and means (72) responsive to the signal from said comparing means, for controlling the optical system to adjust the magnification thereof so as to reproduce the indicia of the document on the copy sheet. A method of reproducing an original document on a copy sheet is also disclosed.
Inventors
- 👤 Eugene B. Franko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 16:09
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; G03G15/041
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
93 words
An electrophotographic printing machine of the type having a variable magnification optical system (17) for adjusting the size of indicia reproduced on a copy sheet from a document, characterized by means (38) for comparing the size of the surface area of the copy sheet with the surface area of the document and generating a signal indicative of the-difference therebetween; and means (72) responsive to the signal from said comparing means, for controlling the optical system to adjust the magnification thereof so as to reproduce the indicia of the document on the copy sheet.
Claim 2
Dependent Claim
93 words
An electrophotographic printing machine of the type having a variable magnification optical system (17) for adjusting the size of indicia reproduced on a copy sheet from a document, characterized by means (38) for comparing the size of the surface area of the copy sheet with the surface area of the document and generating a signal indicative of the-difference therebetween; and means (72) responsive to the signal from said comparing means, for controlling the optical system to adjust the magnification thereof so as to reproduce the indicia of the document on the copy sheet.
Claim 3
Dependent Claim
70 words
A printing machine according to claim 1, wherein said comparing means includes: means (1LS, 2LS, 3LS) for detecting the size of the document and generating a document signal corresponding thereto; means (4LS, 5LS, 6LS) for sensing the size of the copy sheet and generating a copy sheet signal corresponding thereto; and means (84) for measuring the difference between the copy sheet signal and document signal to generate an error signal.
Claim 4
Dependent Claim
53 words
A printing machine according to claim 2, further including a photoconductive member (10) having at least a portion of the surface thereof charged, said photoconductive member (10) being in communication with the optical system (17) so that exposure of the charged portion of said photoconductive member (10) records an electrostatic latent image thereon.
Claim 5
Dependent Claim
103 words
A printing machine according to claim 3, wherein the optical system (17) includes: a support (18) for holding the document thereon; a light source (20) for illuminating the document on said support; and a lens (22) positioned to receive the light rays transmitted from the document and focusing the light image thereof onto the charged portion of said photoconductive member (10) and said controlling means (72) includes a motor coupled to said support (18) and said lens (22) so as to move said support and said lens (22) relative to said photoconductive member (10) to adjust the magnification of the indicia being reproduced.
Claim 6
Dependent Claim
30 words
A printing machine according to claim 4, wherein said controlling means (72) includes means (84) for determining the angular rotation of said motor and generating a motor signal indicative thereof.
Claim 7
Dependent Claim
28 words
A printing machine according to claim 5, wherein logic circuitry compares the error signal with the motor signal to produce an actuating signal controlling the motor angular rotation.
Claim 8
Dependent Claim
45 words
A printing machine according to claim 6, wherein the actuating signal drives the motor (72) in one direction to increase the size of the indicia on the copy sheet and in the other direction to reduce the size of the indicia on the copy sheet.
Claim 9
Independent Claim
64 words
A method of reproducing an original document on a copy sheet, including the steps of: generating a signal indicative of the difference in size between the surface area of the original document and the surface area of the copy sheet; and adjusting the magnification of an optical system in response to the signal so as to reproduce the original document on the copy sheet.
Claim 10
Independent Claim
64 words
A method of reproducing an original document on a copy sheet, including the steps of: generating a signal indicative of the difference in size between the surface area of the original document and the surface area of the copy sheet; and adjusting the magnification of an optical system in response to the signal so as to reproduce the original document on the copy sheet.
Claim 11
Dependent Claim
52 words
A method according to claim 8, wherein said step of generating includes steps of: detecting the size of the original document; sensing the size of the copy sheet; and measuring the difference between the detected size of the original document and the sensed size of the copy sheet to generate the signal.
Claim 12
Dependent Claim
81 words
A method according to claim 9, further including the steps of: supporting the original document on a platen; illuminating the original document; charging at least a portion of a photoconductive member; and transmitting the light rays from the original document to a lens which focuses the light image thereof onto the charged portion of the photoconductive member, said step of adjusting including the step of moving the platen and lens in synchronism relative to the photoconductive member to adjust the magnification.
References Cited (Backward Citations)
No citation records indexed.
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