Patent US4291973A successfully refreshed from Google Patents.
US4291973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning system
Assignee: Xerox Corp
•
Filing: 1979-12-19
•
Granted: 1981-09-29
•
Expires: 1999-12-19
Abstract
Abstract An optical scanning system is provided wherein a document in an object plane is incrementally scanned by movement of a web provided with an elongated window therethrough. Light, reflected from the document in imagewise fashion, passes through the window and is reflected by a mirror moving a synchronism with said window through a projection lens onto an imaging plane.
Inventors
- 👤 Edric R. Brooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:11
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/525; G03B27/526; G03G; G03G15/00; G03G15/22; G03G15/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
An optical scanning system for a copier comprising at least one stationary illumination source for illuminating a document lying in an object plane, at least one scanning mirror adapted for movement in a plane parallel to said object plane, at least one flexible belt adapted for movement in a plane parallel to and located between said object plane and said scanning mirror plane, said flexible belt having at least one elongated window extending across its width, the movement of said mirror and said web being synchronized so that light incrementally reflected from said document is transmitted through said window to said mirror thereby effecting line by line scanning of said document, and projection means for projecting images reflected by said scanning mirror onto a moving imaging plane.
Claim 2
Dependent Claim
127 words
An optical scanning system for a copier comprising at least one stationary illumination source for illuminating a document lying in an object plane, at least one scanning mirror adapted for movement in a plane parallel to said object plane, at least one flexible belt adapted for movement in a plane parallel to and located between said object plane and said scanning mirror plane, said flexible belt having at least one elongated window extending across its width, the movement of said mirror and said web being synchronized so that light incrementally reflected from said document is transmitted through said window to said mirror thereby effecting line by line scanning of said document, and projection means for projecting images reflected by said scanning mirror onto a moving imaging plane.
Claim 3
Dependent Claim
19 words
The optical scanning system of claim 1 wherein said belt and scanning mirror are adapted for synchronous reciprocal motion.
Claim 4
Dependent Claim
15 words
The optical scanning system of claim 1 wherein said flexible belt has an endless configuration.
Claim 5
Dependent Claim
31 words
The optical scanning system of claim 1 wherein two illumination sources are provided, one on each side of the document scan area to provide a relatively uniform illumination of the document.
Claim 6
Dependent Claim
50 words
The optical scanning system of claim 1 wherein two of said flexible belts are provided, the belts aligned so that said elongated windows are aligned, and wherein the belt furthest from the object plane is provided with raised reflective lips for reflecting light away from the window of said belt.
Claim 7
Dependent Claim
25 words
The optical scanning system of claim 5 further including two elongated fresnel mirrors positioned between said belts and at opposite ends of the scan area.
Claim 8
Dependent Claim
19 words
An optical scanning system according to claim 1 in which said flexible web has a diffuse reflective upper surface.
References Cited (Backward Citations)
SU127907A1
Cited
US3419327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |