Patent US2860174A successfully refreshed from Google Patents.
US3663101A
Expired / Lapsed
US
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Microfilm viewer-printer
Assignee: Ricoh Co Ltd
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Filing: 1969-04-30
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Granted: 1972-05-16
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Expires: 1989-04-30
Abstract
Abstract A film projection system for directing an image through a rotatable reflecting mirror and an objective lens in selective paths. One path includes fixed reflecting mirrors and a screen to provide a complete projection. The other path which is determined by the rotation of the reflecting mirror provides a slit projection on a rotatable drum.
Inventors
- 👤 Walther Vor Grabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:50
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/118
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
150 words
A microfilm viewer-printer comprising a rotary reflecting mirror mounted for rotation about an axis located in the plane of said mirror; a source of light directing light along a first path onto said mirror; a first condenser lens located in said first light path between said reflecting mirror and said source; a film gate means including a slit associated with said condenser lens for film having an image thereon to pass therethrough in said first light path; said reflecting mirror rotatable to first and second positions to reflect light along second and third paths, said second and third paths being angularly located with respect to said first path; a viewing screen located in said second path; a photosensitive rotary drum located in said third path; an objective lens selectively movable into either said second or third paths, whereby said lens directs said image onto said screen or said drum respectively.
Claim 2
Dependent Claim
150 words
A microfilm viewer-printer comprising a rotary reflecting mirror mounted for rotation about an axis located in the plane of said mirror; a source of light directing light along a first path onto said mirror; a first condenser lens located in said first light path between said reflecting mirror and said source; a film gate means including a slit associated with said condenser lens for film having an image thereon to pass therethrough in said first light path; said reflecting mirror rotatable to first and second positions to reflect light along second and third paths, said second and third paths being angularly located with respect to said first path; a viewing screen located in said second path; a photosensitive rotary drum located in said third path; an objective lens selectively movable into either said second or third paths, whereby said lens directs said image onto said screen or said drum respectively.
Claim 3
Dependent Claim
25 words
A film projection system according to claim 1 in which the rotation of said reflecting mirror is synchronized with the movement of said objective lens.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |