US3775008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical scanning apparatus
Assignee: Xerox Corp
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Filing: 1971-08-25
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Granted: 1973-11-27
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Expires: 1991-08-25
Abstract
Abstract An optical system is disclosed herein for scanning a stationary original and placing a flowing light image thereof upon a moving light receiving member. The original is placed upon a light transmitting platen and successive incremental areas thereon scanned by means of a moving lamp and a moving lens which cooperate to focus a flowing image of the original on the moving surface in synchronous timed relation therewith. A shutter is positioned adjacent to the optical path and is arranged to move into a light blocking position to prevent exposure of the photosensitive surface when said surface is not in motion.
Inventors
- 👤 R Schaeffer
- 👤 W White
- 👤 S Coriale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:31
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/525; G03B27/526
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
224 words
An apparatus for projecting a flowing light image onto a moving light receiving surface of the type wherein a lens element is arranged to focus light reflected from an original through a slit aperture onto the light receiving surface, the lens element scans the original at a rate relative to the light receiving surface to place a flowing light image of the stationary original thereon, wherein the improvement includes: a framemember; a platen member mounted on said frame member for supporting the original, said platen member having one side edge thereof unsupported by said frame member and suspended thereover; an elongated lamp positioned adjacent said platen member with the longitudinal axis of said lamp being substantially parallel to said platen member, said lamp being substantially opaque and having a light ransmitting portion extending lingitudinally across the surface thereof, said lamp being arranged so that the light transmitting portion directs an incremental band of illumination forwardo of said lamp in the direction of the unsupported side edge of said platen member; and means for moving said lamp in a time relation with the lens to focus successive incremental bands of illumination, said moving means advancing said lamp in a direction substantially transverse to the longitudinal axis of said lamp and substantially parallel to said platen member toward the unsupported side edge of said platen member.
Claim 2
Independent Claim
224 words
An apparatus for projecting a flowing light image onto a moving light receiving surface of the type wherein a lens element is arranged to focus light reflected from an original through a slit aperture onto the light receiving surface, the lens element scans the original at a rate relative to the light receiving surface to place a flowing light image of the stationary original thereon, wherein the improvement includes: a framemember; a platen member mounted on said frame member for supporting the original, said platen member having one side edge thereof unsupported by said frame member and suspended thereover; an elongated lamp positioned adjacent said platen member with the longitudinal axis of said lamp being substantially parallel to said platen member, said lamp being substantially opaque and having a light ransmitting portion extending lingitudinally across the surface thereof, said lamp being arranged so that the light transmitting portion directs an incremental band of illumination forwardo of said lamp in the direction of the unsupported side edge of said platen member; and means for moving said lamp in a time relation with the lens to focus successive incremental bands of illumination, said moving means advancing said lamp in a direction substantially transverse to the longitudinal axis of said lamp and substantially parallel to said platen member toward the unsupported side edge of said platen member.
Claim 3
Dependent Claim
57 words
An apparatus as recited in claim 1, wherein said movingmeans includes a rotary driven, substantially cylindrical cam member arranged to advance said lamp and lens element during the scanning pass and to return said lamp and lens element to respective start of scan positions after each scanning pass at a rate in excess of the advancing rate.
Claim 4
Dependent Claim
67 words
An apparatus as recited in claim 2, further including: first switch means affixed to said frame member and arranged to energize said lamp member at the satart of the scanning pass; and second switch means affixed to said frame member and arranged to de-energize said lamp member at the end of the scanning pass, said lamp being de-energized during the return to the start of scan position.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |