US4733485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desktop film viewer
Assignee: Slidex Corp
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Filing: 1985-12-20
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Granted: 1988-03-29
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Expires: 2005-12-20
Abstract
Abstract A desktop film viewer includes a box-shaped structure consisting of a cover member and a main member fitted with each other, a light transmission diffusion plate provided on the cover member, and a light source and reflectors provided in the main member to illuminate the light transmission diffusion plate. The box-shaped structure comprises wedge-shaped side surfaces. At the acute angle edges of the wedge-shaped side surfaces, the main member and the cover member are pivotally connected to each other. The box-shaped structure further comprises foldable linked stays for maintaining the box-shaped structure opened at any angles.
Inventors
- 👤 Jiro Ozeki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:16
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/024
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
162 words
A desktop film viewer comprising: a box-shaped structure having a cover member and a main member interfitting with each other, a light transmission diffusion plate provided on said cover member, a light source provided in said main member to illuminate said light transmission diffusion plate of said cover member, a light reflecting surface located in said main member to reflect light from said light source onto said light transmission diffusion plate, a reflecting plate suspended from said cover member for reflecting light onto said light transmission diffusion plate, said reflecting plate having two ends, one end being pivotably mounted on said cover member and the other end being slidably mounted on said light reflecting surface of said main member, said box-shaped structure includes wedge-shaped side surfaces having acute angle edges where said main member and said cover member are pivotally connected to each other, and support means for adjusting an angle of inclination of said cover member relative to said main member.
Claim 2
Dependent Claim
162 words
A desktop film viewer comprising: a box-shaped structure having a cover member and a main member interfitting with each other, a light transmission diffusion plate provided on said cover member, a light source provided in said main member to illuminate said light transmission diffusion plate of said cover member, a light reflecting surface located in said main member to reflect light from said light source onto said light transmission diffusion plate, a reflecting plate suspended from said cover member for reflecting light onto said light transmission diffusion plate, said reflecting plate having two ends, one end being pivotably mounted on said cover member and the other end being slidably mounted on said light reflecting surface of said main member, said box-shaped structure includes wedge-shaped side surfaces having acute angle edges where said main member and said cover member are pivotally connected to each other, and support means for adjusting an angle of inclination of said cover member relative to said main member.
Claim 3
Dependent Claim
27 words
A desktop film viewer as set forth in claim 1, wherein said main member comprises a bottom wall in the form of an opened V-shape in cross-section.
Claim 4
Dependent Claim
49 words
A desktop film viewer as set forth in claim 1, wherein said cover member is provided on a side opposite to the acute angle edges with an end wall substantially perpendicular to the cover member and curved outwardly to form a convex wall like a spine of a book.
Claim 5
Dependent Claim
29 words
A desktop film viewer as set forth in claim 1, wherein an inner surface of said bottom wall of said main member is coated with a light reflecting substance.
Claim 6
Dependent Claim
40 words
A desktop film viewer as set forth in claim 2, wherein below one wall forming one bottom wall of said V-shaped bottom wall there is provided with a partition frame for accommodating a transformer for the light source and cords.
Claim 7
Dependent Claim
112 words
A desktop film viewer comprising: a box-shaped structure having a cover member and a main member interfitting with each other, a light transmission diffusion plate provided on said cover member, a light source and reflectors provided in said main member to illuminate said light transmission diffusion plate of said cover member, said box-shaped structure includes wedge-shaped side surfaces having acute angle edges where said main member and said cover member are pivotally connected to each other, and support means for maintaining said cover member opened relative to said main member, said cover member includes in its inside, on a side opposite to said acute angle edges, a reflecting plate freely depending therefrom.
Claim 8
Dependent Claim
112 words
A desktop film viewer comprising: a box-shaped structure having a cover member and a main member interfitting with each other, a light transmission diffusion plate provided on said cover member, a light source and reflectors provided in said main member to illuminate said light transmission diffusion plate of said cover member, said box-shaped structure includes wedge-shaped side surfaces having acute angle edges where said main member and said cover member are pivotally connected to each other, and support means for maintaining said cover member opened relative to said main member, said cover member includes in its inside, on a side opposite to said acute angle edges, a reflecting plate freely depending therefrom.
Claim 9
Dependent Claim
27 words
A desktop film viewer as set forth in claim 6, wherein said main member comprises a bottom wall in the form of an opened V-shape in cross-section.
Claim 10
Dependent Claim
49 words
A desktop film viewer as set forth in claim 6, wherein said cover member is provided on a side opposite to the acute angle edges with an end wall substantially perpendicular to the cover member and curved outwardly to form a convex wall like a spine of a book.
Claim 11
Dependent Claim
29 words
A desktop film viewer as set forth in claim 6, wherein an inner surface of the bottom wall of said main member is coated with a light reflecting substance.
Claim 12
Dependent Claim
40 words
A desktop film viewer as set forth in claim 7, wherein below one wall forming one bottom wall of said V-shaped bottom wall there is provided a partition frame for accommodating a transformer and power cords for the light source.
Claim 13
Dependent Claim
49 words
A desktop film viewer as set forth in claim 6, wherein said cover member is provided on its outer surface with supports movable into a concealed position and a supporting position for supporting a file sheet including films to be viewed when the cover member is inclined for viewing.
Claim 14
Dependent Claim
126 words
A desktop film viewer comprising: a box-shaped structure having a cover member and a main member interfitting with each other, a light transmission diffusion plate provided on said cover member, a light source and reflectors provided in said main member to illuminate said light transmission diffusion plate of said cover member, said box-shaped structure includes wedge-shaped side surfaces having acute angle edges where said main member and said cover member are pivotally connected to each other, and support means for maintaining said cover member opened relative to said main member, said cover member includes on its outer surface, supports movable into a concealed position and a supporting position for supporting a file sheet including films to be viewed when the cover member is inclined for viewing.
Claim 15
Dependent Claim
126 words
A desktop film viewer comprising: a box-shaped structure having a cover member and a main member interfitting with each other, a light transmission diffusion plate provided on said cover member, a light source and reflectors provided in said main member to illuminate said light transmission diffusion plate of said cover member, said box-shaped structure includes wedge-shaped side surfaces having acute angle edges where said main member and said cover member are pivotally connected to each other, and support means for maintaining said cover member opened relative to said main member, said cover member includes on its outer surface, supports movable into a concealed position and a supporting position for supporting a file sheet including films to be viewed when the cover member is inclined for viewing.
Claim 16
Dependent Claim
27 words
A desktop film viewer as set forth in claim 12, wherein said main member comprises a bottom wall in the form of an opened V-shape in cross-section.
Claim 17
Dependent Claim
49 words
A desktop film viewer as set forth in claim 12, wherein said cover member is provided on a side opposite to the acute angle edges with an end wall substantially perpendicular to the cover member and curved outwardly to form a convex wall like a spine of a book.
Claim 18
Dependent Claim
29 words
A desktop film viewer as set forth in claim 12, wherein an inner surface of said bottom wall of said main member is coated with a light reflecting substance.
Claim 19
Dependent Claim
35 words
A desktop film viewer as set forth in claim 12, wherein said cover member is provided in its inside on a side opposite to said acute angle edges with a reflecting plate freely depending therefrom.
Claim 20
Dependent Claim
40 words
A desktop film viewer as set forth in claim 13, wherein below one wall forming one bottom wall of said V-shaped bottom wall there is provided a partition frame for accommodating a transformer and power cords for the light source.
References Cited (Backward Citations)
US2436162A
Cited
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Cited
US4335421A
Cited
US4468873A
Cited
US4564886A
Cited
US4589659A
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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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |