US3703334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic apparatus
Assignee: Individual
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Filing: 1970-07-13
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Granted: 1972-11-21
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Expires: 1990-07-13
Abstract
Abstract The system includes a first mirror for reflecting light images onto the photosensitive member in first magnification and a second mirror selectively movable from an inoperative to an operative position for reflecting light images onto the member in second magnification different from the first magnification. The system also includes a lens selectively movable to focus the image applied to the photosensitive member by the operative mirror.
Inventors
- 👤 Wilhelm Josef Knechtel
- 👤 Detlef Schaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:51
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; G03G15/041; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/523
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
186 words
Electrophotographic apparatus including a system for varying the magnification of images of an original projected onto a member having a photosensitive surface, comprising: a. first and second support means fixedly mounted in said apparatus respectively for supporting said original and said member during image projection; b. means for illuminating said original to provide a light image thereof; c. reflective means including a first mirror supported in said apparatus and defining an optical path of first predetermined length between said original and said photosensitive surface for reflecting said light image onto said photosensitive surface in first magnification and a second mirror supported in an inoperative position in said apparatus and selectively movable therefrom to a predetermined operative position and therein defining an optical path of second predetermined length between said original and said photosensitive surface for reflecting said light image onto said photosensitive surface in second magnification different from said first magnification; and d. an objective lens supported for movement in said apparatus into first or second predetermined positions respectively for focusing said light image in said first or in said second magnification on said photosensitive surface.
Claim 2
Dependent Claim
186 words
Electrophotographic apparatus including a system for varying the magnification of images of an original projected onto a member having a photosensitive surface, comprising: a. first and second support means fixedly mounted in said apparatus respectively for supporting said original and said member during image projection; b. means for illuminating said original to provide a light image thereof; c. reflective means including a first mirror supported in said apparatus and defining an optical path of first predetermined length between said original and said photosensitive surface for reflecting said light image onto said photosensitive surface in first magnification and a second mirror supported in an inoperative position in said apparatus and selectively movable therefrom to a predetermined operative position and therein defining an optical path of second predetermined length between said original and said photosensitive surface for reflecting said light image onto said photosensitive surface in second magnification different from said first magnification; and d. an objective lens supported for movement in said apparatus into first or second predetermined positions respectively for focusing said light image in said first or in said second magnification on said photosensitive surface.
Claim 3
Dependent Claim
186 words
Electrophotographic apparatus including a system for varying the magnification of images of an original projected onto a member having a photosensitive surface, comprising: a. first and second support means fixedly mounted in said apparatus respectively for supporting said original and said member during image projection; b. means for illuminating said original to provide a light image thereof; c. reflective means including a first mirror supported in said apparatus and defining an optical path of first predetermined length between said original and said photosensitive surface for reflecting said light image onto said photosensitive surface in first magnification and a second mirror supported in an inoperative position in said apparatus and selectively movable therefrom to a predetermined operative position and therein defining an optical path of second predetermined length between said original and said photosensitive surface for reflecting said light image onto said photosensitive surface in second magnification different from said first magnification; and d. an objective lens supported for movement in said apparatus into first or second predetermined positions respectively for focusing said light image in said first or in said second magnification on said photosensitive surface.
Claim 4
Dependent Claim
186 words
Electrophotographic apparatus including a system for varying the magnification of images of an original projected onto a member having a photosensitive surface, comprising: a. first and second support means fixedly mounted in said apparatus respectively for supporting said original and said member during image projection; b. means for illuminating said original to provide a light image thereof; c. reflective means including a first mirror supported in said apparatus and defining an optical path of first predetermined length between said original and said photosensitive surface for reflecting said light image onto said photosensitive surface in first magnification and a second mirror supported in an inoperative position in said apparatus and selectively movable therefrom to a predetermined operative position and therein defining an optical path of second predetermined length between said original and said photosensitive surface for reflecting said light image onto said photosensitive surface in second magnification different from said first magnification; and d. an objective lens supported for movement in said apparatus into first or second predetermined positions respectively for focusing said light image in said first or in said second magnification on said photosensitive surface.
Claim 5
Dependent Claim
43 words
The apparatus claimed in claim 1 further including a motor for moving said second mirror into said operative position, a cam associated with said second mirror and switch means actuated by said cam on movement of said second mirror into said operative position.
Claim 6
Dependent Claim
13 words
The apparatus claimed in claim 1 wherein said mirrors have different reflection factors.
Claim 7
Dependent Claim
29 words
The apparatus claimed in claim 3 wherein said first mirror provides a higher image magnification than said second mirror and has a higher reflection factor than said second mirror.
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |