Patent US4811110A successfully refreshed from Google Patents.
US4811110A
Expired / Lapsed
US
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Reflection-type overhead projector
Assignee: Fujifilm Holdings Corp
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Filing: 1988-04-18
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Granted: 1989-03-07
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Expires: 2008-04-18
Abstract
Abstract A reflection-type overhead projector having a projection lamp and projection lens-and-mirror system disposed above a base on a gooseneck arm for projecting a transparency placed on the base on a remote screen. The overhead projector has a copying device incorporated therein for making a copy from a reflective original on a secondary original or a transparency, which comprises an image-scanning head movable lengthwise over the reflective original placed on a Fresnel mirror on the base to provide image signals; a mirror attached to the image scanning head for directing light from the projection lamp onto the reflective original just below the image scanning head; and a thermal printing head for thermally printing an image of the reflective original on a secondary original or a transparency according to the image signals.
Inventors
- 👤 Hiroshi Ohmura
- 👤 Seimei Ushiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:22
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00127; H04N1/00249; H04N1/00267; H04N1/024; H04N1/028; H04N1/03; H04N1/031; H04N1/0313; H04N1/04; H04N1/10; H04N1/1013; H04N1/1017; H04N1/1039; H04N1/1043; H04N1/1048; H04N1/1052; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N2201/00; H04N2201/04; H04N2201/0402; H04N2201/0436; H04N2201/0438; H04N2201/045
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
In a reflection-type overhead projector which has projection means disposed above a base on which a transparency is placed, said projection means including a projection light source for illuminating the transparency placed on the base and a mirror-and-lens system for projecting an image of the illuminated transparency on a remote screen; the improvement comprising: a Fresnel mirror on said base on which a reflecting original can be placed; means movable over said Fresnel mirror for scanning said reflecting original in a transverse line to provide image signals; a mirror attached to said means for directing light emanating from said projection light source onto said reflecting original below said means; and printing means for printing an image of said reflecting original on a transparent sheet material responsive to said image signals provided by said means, thereby making a transparency to be projected with said overhead projector.
Claim 2
Dependent Claim
145 words
In a reflection-type overhead projector which has projection means disposed above a base on which a transparency is placed, said projection means including a projection light source for illuminating the transparency placed on the base and a mirror-and-lens system for projecting an image of the illuminated transparency on a remote screen; the improvement comprising: a Fresnel mirror on said base on which a reflecting original can be placed; means movable over said Fresnel mirror for scanning said reflecting original in a transverse line to provide image signals; a mirror attached to said means for directing light emanating from said projection light source onto said reflecting original below said means; and printing means for printing an image of said reflecting original on a transparent sheet material responsive to said image signals provided by said means, thereby making a transparency to be projected with said overhead projector.
Claim 3
Dependent Claim
40 words
An overhead projector as defined in claim 1, further comprising a transparent cover pivotally mounted on said base so as to cover and uncover said Fresnel mirror with said reflecting original between said transparent cover and said Fresnel mirror plate.
Claim 4
Dependent Claim
26 words
An overhead projector as defined in claim 1, and means within said base below and parallel to said Fresnel mirror for supporting said transparent sheet material.
Claim 5
Dependent Claim
31 words
An overhead projector as defined in claim 3, and means mounting said Fresnel mirror for vertical swinging movement on and relative to said base to cover and uncover said supporting means.
Claim 6
Dependent Claim
16 words
An overhead projector as defined in claim 1, wherein said means includes a line image sensor.
Claim 7
Dependent Claim
42 words
An overhead projector as defined in claim 5, wherein said means comprises an open-bottomed housing mounting therein said line image sensor which receives the light reflected from said reflecting original and carrying on one side thereof said mirror inclined at an angle.
Claim 8
Dependent Claim
69 words
An overhead projector as defined in claim 5, wherein said means comprises a housing supporting a half mirror inclined at 45° with respect to said Fresnel mirror so as to pass light emanating from said projecting light source straight down and to reflect the light reflected from said reflecting original at a right angle and supporting said line image sensor to receive said light reflected by said half mirror.
Claim 9
Dependent Claim
18 words
An overhead projector as defined in claim 1, wherein said transparent sheet material is placed within said base.
Claim 10
Dependent Claim
20 words
An overhead projector as defined in claim 8, wherein said printing head is movable lengthwise over said transparent sheet material.
Claim 11
Dependent Claim
23 words
An overhead projector as defined in claim 9, wherein said transparent sheet material contains heat sensitive particles adapted to be blackened by heat.
Claim 12
Dependent Claim
17 words
An overhead projector as defined in claim 10, wherein said printing means is a thermal printing head.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |