US4483609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illumination device for a copying machine
Assignee: Fujifilm Business Innovation Corp
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Filing: 1982-02-09
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Granted: 1984-11-20
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Expires: 2002-02-09
Abstract
Abstract The device for illuminating an original document in a copying machine in which the original document is properly illuminated both when it is in contact with a platen and when it floats above the platen. A main reflector is disposed around a light source to produce an arc of illumination directed toward the platen. A primary reflector disposed within the periphery of the arc reflects a first beam toward the platen while a floating-original reflector, also disposed within the periphery of the arc, reflects a second beam of light toward the platen in a direction so as to illuminate the original document within a predetermined range of distance from the platen.
Inventors
- 👤 Masaaki Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:19
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/54; G03B27/542; G03G; G03G15/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
192 words
An illumination device for a copying machine comprising: an image formation optical system; a light source and a main reflector disposed about said light source and producing an arc of illumination directed toward a platen of said copying machine at a first angle relative to a plane perpendicular to said platen at a line image formation line on said platen; a primary reflector disposed within the periphery of said arc of illumination and reflecting a first parallel beam of light toward said platen at a second angle, opposite in sign to said first angle, relative to said plane perpendicular to said platen; a floating-original reflector disposed within said periphery of said arc of illumination, outside said main reflector, and reflecting a second parallel beam of light toward said platen at a third angle, significantly smaller than said first and second angles, relative to said plane perpendicular to said platen, said floating-original reflector being disposed between said image formation optical system and said main reflector at a position such that said second beam of light is directed to a position of an original floating within a predetermined range of distance from said platen.
Claim 2
Dependent Claim
192 words
An illumination device for a copying machine comprising: an image formation optical system; a light source and a main reflector disposed about said light source and producing an arc of illumination directed toward a platen of said copying machine at a first angle relative to a plane perpendicular to said platen at a line image formation line on said platen; a primary reflector disposed within the periphery of said arc of illumination and reflecting a first parallel beam of light toward said platen at a second angle, opposite in sign to said first angle, relative to said plane perpendicular to said platen; a floating-original reflector disposed within said periphery of said arc of illumination, outside said main reflector, and reflecting a second parallel beam of light toward said platen at a third angle, significantly smaller than said first and second angles, relative to said plane perpendicular to said platen, said floating-original reflector being disposed between said image formation optical system and said main reflector at a position such that said second beam of light is directed to a position of an original floating within a predetermined range of distance from said platen.
Claim 3
Dependent Claim
22 words
The illumination device of claim 1, wherein said image formation optical system has an image formation width no greater than 5 mm.
Claim 4
Dependent Claim
22 words
The illumination device of claim 1, wherein said range of distance of floatation of said original is 3 mm to 7 mm.
Claim 5
Dependent Claim
18 words
The illumination device of claim 1, wherein both said primary reflector and said floating-original reflector are flat reflectors.
Claim 6
Dependent Claim
26 words
The illuminating device as in claim 1, wherein said beams of light both from said primary reflector and said floating-original reflector are of substantially parallel light.
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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |