US4113379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illumination apparatus for electronic copying machines
Assignee: Xerox Ltd
•
Filing: 1977-07-18
•
Granted: 1978-09-12
•
Expires: 1997-07-18
Abstract
Abstract Illumination apparatus for electronic copying machines comprising a casing 1 having an elongated opening 5 extending in a longitudinal direction thereof wherein light sources 6 and 6' are disposed respectively at both ends of said casing 1, the inner surface of said casing 1 being formed as a diffusing reflection surface and a light screening plate 7 being provided so as to prevent direct emission of light through said opening 5 from said light sources 6 and 6'.
Inventors
- 👤 Masaaki Harada
- 👤 Tsuguto Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:17
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/54; G03B27/542
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
Illumination apparatus for use in a reproduction machine, said apparatus comprising: a casing having an elongated opening in one wall thereof; illumination means disposed at opposite ends of said casing; and means supported intermediate said elongated opening and said illumination means to preclude direct emission of illumination from said opening, said means being shaped so as to provide a substantially uniform distribution of illumination along said elongated opening, said means for precluding direct emission of illumination comprising a screen plate having the shape of a bow tie.
Claim 2
Dependent Claim
87 words
Illumination apparatus for use in a reproduction machine, said apparatus comprising: a casing having an elongated opening in one wall thereof; illumination means disposed at opposite ends of said casing; and means supported intermediate said elongated opening and said illumination means to preclude direct emission of illumination from said opening, said means being shaped so as to provide a substantially uniform distribution of illumination along said elongated opening, said means for precluding direct emission of illumination comprising a screen plate having the shape of a bow tie.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1 wherein said means for precluding direct emission of illumination is adjustably supported in said casing.
Claim 4
Dependent Claim
64 words
Apparatus according to claim 2 including a pair of guide plates for supporting one end of said screening plate and at least one support plate for the opposite end thereof, said apparatus further including a bolt attached to the end of said screenining plate adjacent said at least one support plate and means operatively associated therewith for effecting longitudinal shifting of said screening plate.
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) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |