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US4358199A
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Slit-exposure type illumination apparatus
Assignee: Ricoh Co Ltd
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Filing: 1980-08-04
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Granted: 1982-11-09
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Expires: 2000-08-04
Abstract
Abstract A slit-exposure type illumination apparatus capable of scanning a stationary original document by swinging an exposure lamp at a predetermined position and having side reflectors on the opposite sides of each linear light source and a pair of auxiliary plane reflectors which are disposed in the scanning direction of the illumination apparatus.
Inventors
- 👤 Koki Isago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:11
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/525; G03B27/54; G03B27/542
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
In an illumination apparatus for successively scanning elongate portions of a document with light, comprising at least one elongate light source each disposed near the focal line of a respective curved reflector, a planar reflector disposed adjacent each said light source for directing the light therefrom towards the document, and means for sweeping the light reflected from each said planar reflector across the document synchronously, the improvement wherein two planar side reflectors are disposed on the respective ends of each said light source, and a pair of auxiliary reflectors extending along the direction of scanning of said document on opposite sides thereof and each auxiliary reflector being essentially in the shape of a chevron with the peak thereof being located generally at the center of scanning of the document.
Claim 2
Dependent Claim
129 words
In an illumination apparatus for successively scanning elongate portions of a document with light, comprising at least one elongate light source each disposed near the focal line of a respective curved reflector, a planar reflector disposed adjacent each said light source for directing the light therefrom towards the document, and means for sweeping the light reflected from each said planar reflector across the document synchronously, the improvement wherein two planar side reflectors are disposed on the respective ends of each said light source, and a pair of auxiliary reflectors extending along the direction of scanning of said document on opposite sides thereof and each auxiliary reflector being essentially in the shape of a chevron with the peak thereof being located generally at the center of scanning of the document.
Claim 3
Dependent Claim
59 words
An apparatus according to claim 1, the two planar reflectors for each said light source including an inner reflector located adjacent the inner end of the respective light source and an outer reflector located adjacent the outer end of the respective light source, each inner reflector being lower in height than the outer reflector of the same light source.
Claim 4
Dependent Claim
25 words
An apparatus according to claim 2, including two of said light sources offset laterally with said outer reflector being on opposite sides of said apparatus.
Claim 5
Dependent Claim
16 words
An apparatus according to claim 3, said auxiliary reflectors being coplanar with a respective outer reflector.
References Cited (Backward Citations)
US3720465A
Cited
US4189763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |