US4143964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning light source
Assignee: Ricoh Co Ltd
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Filing: 1977-03-07
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Granted: 1979-03-13
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Expires: 1997-03-07
Abstract
Abstract A curved reflector is disposed behind an elongated lamp for reflecting light from the lamp onto a document carrier in the form of a narrow elongated beam. The carrier is movable perpendicular to the beam for scanning a document placed on the carrier. One or more orifices are formed through the back of the reflector and a blower creates an air flow through the orifice and around the lamp for cooling the same.
Inventors
- 👤 Yukio Ogura
- 👤 Hisao Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:21
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/54; G03B27/542
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
A light source for radiating a narrow elongated beam of light onto a document carrier which is movable perpendicular to the beam, comprising in combination: an elongated lamp; an elongated reflector operatively disposed parallel to and behind the lamp for reflecting light therefrom onto the document carrier thereby forming the beam, the reflector being formed with orifice means through a rear portion thereof; a blower disposed behind the reflector for causing air to flow through the orifice means and around the lamp; and a duct communicating with the orifice means, the blower being disposed in the duct.
Claim 2
Dependent Claim
97 words
A light source for radiating a narrow elongated beam of light onto a document carrier which is movable perpendicular to the beam, comprising in combination: an elongated lamp; an elongated reflector operatively disposed parallel to and behind the lamp for reflecting light therefrom onto the document carrier thereby forming the beam, the reflector being formed with orifice means through a rear portion thereof; a blower disposed behind the reflector for causing air to flow through the orifice means and around the lamp; and a duct communicating with the orifice means, the blower being disposed in the duct.
Claim 3
Dependent Claim
22 words
A light source as in claim 1, in which the blower causes air to flow from the duct through the orifice means.
Claim 4
Dependent Claim
22 words
A light source as in claim 1, in which the blower causes air to flow through the orifice means into the duct.
Claim 5
Dependent Claim
23 words
A light source as in claim 1, in which the reflector has an elliptical cross section with a focus coincident with the lamp.
Claim 6
Dependent Claim
26 words
A light source as in claim 1, in which the orifice means is formed so as to constitute an elongated orifice extending parallel to the lamp.
Claim 7
Dependent Claim
28 words
A light source as in claim 1, in which the orifice means is formed so as to constitute a row of round orifices extending parallel to the lamp.
Claim 8
Dependent Claim
30 words
A light source as in claim 1, in which the orifice means is formed so as to constitute a plurality of rows of round orifices extending parallel to the lamp.
Claim 9
Dependent Claim
28 words
A light source as in claim 1, in which the reflector comprises two sections having different elliptical cross sections, each section having a focus coincident with the lamp.
Claim 10
Dependent Claim
113 words
A light source for radiating a narrow elongated beam of light onto a document carrier which is movable perpendicular to the beam, comprising in combination: an elongated lamp; an elongated reflector operatively disposed parallel to and behind the lamp for reflecting light therefrom onto the document carrier thereby forming the beam; orifice means formed through a rear portion of the reflector and located such that the orifice means does not obstruct the light beam reflected onto the document carrier, a duct communicating with the orifice means, said reflector being mounted on the duct, and a blower disposed in the duct for causing air to flow through the orifice means and between the lamp.
Claim 11
Dependent Claim
113 words
A light source for radiating a narrow elongated beam of light onto a document carrier which is movable perpendicular to the beam, comprising in combination: an elongated lamp; an elongated reflector operatively disposed parallel to and behind the lamp for reflecting light therefrom onto the document carrier thereby forming the beam; orifice means formed through a rear portion of the reflector and located such that the orifice means does not obstruct the light beam reflected onto the document carrier, a duct communicating with the orifice means, said reflector being mounted on the duct, and a blower disposed in the duct for causing air to flow through the orifice means and between the lamp.
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) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |