US4444488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable mirror support for copying apparatus
Assignee: Konica Minolta Inc
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Filing: 1982-01-05
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Granted: 1984-04-24
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Expires: 2002-01-05
Abstract
Abstract In the optical system of an electrophotographic copying apparatus embodying movable mirrors, it is of the utmost importance that these mirrors be properly aligned relatively to one another. In the present invention, two of the mirrors mounted at right angles to one another on a slidable frame which moves at half the speed of another movable mirror, are mounted on that frame for slight pivotal movement. This pivotal movement is controllable to provide adjustment of errors in the optical system and when adjustment is completed the mirrors are fixed in place.
Inventors
- 👤 Yozo Fujii
- 👤 Kazuo Murakami
- 👤 Hirofumi Sakaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:17
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/525; G03B27/526
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
124 words
In an electrophotographic copying apparatus of the type in which the illuminated image of an original placed on a transparent glass is directed toward a photosensitive member by an optical system which includes a first movable mirror, and second and third movable mirrors travelling at half the speed of the first movable mirror, the improvement comprising a slidable frame, a support, means mounting said second and third mirrors on said support in spatial relationship one with the other, facing one another at a 90° angle, means pivotally mounting said support on said frame for adjustably positioning said second and third mirrors relative to said first mirror and other elements of the optical systems, and means holding said mirror support in the desired adjusted position.
Claim 2
Dependent Claim
124 words
In an electrophotographic copying apparatus of the type in which the illuminated image of an original placed on a transparent glass is directed toward a photosensitive member by an optical system which includes a first movable mirror, and second and third movable mirrors travelling at half the speed of the first movable mirror, the improvement comprising a slidable frame, a support, means mounting said second and third mirrors on said support in spatial relationship one with the other, facing one another at a 90° angle, means pivotally mounting said support on said frame for adjustably positioning said second and third mirrors relative to said first mirror and other elements of the optical systems, and means holding said mirror support in the desired adjusted position.
Claim 3
Dependent Claim
36 words
An electrophotographic copying apparatus according to claim 1, in which the means pivotally mounting said support for adjustably positioning said second and third mirrors includes a spring-loaded adjusting screw extending from said frame to said support.
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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |