US3799662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image projecting device
Assignee: Fujifilm Holdings Corp
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Filing: 1970-11-06
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Granted: 1974-03-26
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Expires: 1990-11-06
Abstract
Abstract Apparatus for projecting images of a film onto a screen through a projection lens system, comprising a film support having perforations, a pump for applying a suction to the perforations to draw the film into contact with the support, a nozzle disposed on the side of the film opposite to the support for blowing air onto the film to urge it toward the support, and a valve for controlling the suction and air flow to the support perforations and the nozzle.
Inventors
- 👤 H Ueda
- 👤 S Ohue
- 👤 Y Sawano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:38
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/115
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
155 words
Apparatus for projecting images comprising a device for moving a film to and from a position wherein it is projected along an optical axis, said device including a film supporting plate having a plurality of perforations therein, said plate having a finely roughened surface in contact with said film, and being transparent, means for blowing air through said perforations when the film is moved laterally, means for applying suction through said perforations when the film is stopped, valve means connected to said suction and blowing means for selectively applying suction and air pressure to the bottom suRface of the film through said perforations and at least one nozzle disposed on the side of the film opposite to the side of said support plate and means for connecting said nozzle to said air blowing means when said suction means is applied to the bottom surface of the film through said perforations to maintain it in position.
Claim 2
Dependent Claim
155 words
Apparatus for projecting images comprising a device for moving a film to and from a position wherein it is projected along an optical axis, said device including a film supporting plate having a plurality of perforations therein, said plate having a finely roughened surface in contact with said film, and being transparent, means for blowing air through said perforations when the film is moved laterally, means for applying suction through said perforations when the film is stopped, valve means connected to said suction and blowing means for selectively applying suction and air pressure to the bottom suRface of the film through said perforations and at least one nozzle disposed on the side of the film opposite to the side of said support plate and means for connecting said nozzle to said air blowing means when said suction means is applied to the bottom surface of the film through said perforations to maintain it in position.
Claim 3
Dependent Claim
56 words
Apparatus for projecting images as claimed in claim 1 further comprising a projection optical system having an optical path, a shutter for closing the optical path of the projection optical system and means for making the shutter close the optical path when the film is moved out of contact with the surface of said supporting plate.
Claim 4
Dependent Claim
17 words
Apparatus for projecting images as claimed in claim 1 wherein said valve means comprise an electromagnetic valve.
Claim 5
Dependent Claim
30 words
Apparatus for projecting images as claimed in claim 1 wherein said nozzle is connected to said suction means when said air blowing means operates to blow air through said perforations.
Claim 6
Dependent Claim
25 words
Apparatus for projecting images as claimed in claim 4 wherein said nozzle is connected with said suction and air blowing means through said valve means.
Claim 7
Dependent Claim
29 words
Apparatus for projecting images as claimed in claim 5 further comprising means for generating a signal for switching said valve means in response to the stopping of the film.
Claim 8
Dependent Claim
77 words
Apparatus for projecting images of a film onto a screen through a projection lens system, comprising: a transparent film support having suction means for holding the film thereon, said support having a finely roughened surface in contact with said film, an air blower disposed on the side of the film opposite to said support for urging the film toward said film support during optical projection, and means for simultaneously operating said air blower and said suction means.
Claim 9
Dependent Claim
77 words
Apparatus for projecting images of a film onto a screen through a projection lens system, comprising: a transparent film support having suction means for holding the film thereon, said support having a finely roughened surface in contact with said film, an air blower disposed on the side of the film opposite to said support for urging the film toward said film support during optical projection, and means for simultaneously operating said air blower and said suction means.
Claim 10
Dependent Claim
30 words
Apparatus for projecting images of a film onto a screen as defined in claim 9 wherein said means for simultaneously operating said blower and suction means comprises a vacuum pump.
Claim 11
Dependent Claim
109 words
In a projection device in which film having an image frame is movable from a projecting position in a direction parallel to the plane of the film, the improvement comprising a transparent support plate having a plurality of perforations therethrough and being finely roughened on the surface thereof facing said film, means for applying suction through said perforations to urge the film into close contact with the surface of said support plate, and means for blowing air onto said film from the side of said film opposite that of said support plate to maintain said film in contact with said plate during optical projection of the image carried thereby.
Claim 12
Dependent Claim
109 words
In a projection device in which film having an image frame is movable from a projecting position in a direction parallel to the plane of the film, the improvement comprising a transparent support plate having a plurality of perforations therethrough and being finely roughened on the surface thereof facing said film, means for applying suction through said perforations to urge the film into close contact with the surface of said support plate, and means for blowing air onto said film from the side of said film opposite that of said support plate to maintain said film in contact with said plate during optical projection of the image carried thereby.
Claim 13
Dependent Claim
25 words
A projection device as defined in claim 9 wherein said support plate has an area large enough to support the image frame on said film.
Claim 14
Dependent Claim
27 words
A projection device as claimed in claim 10 wherein said area is as large as the size of one frame of the image recorded on said film.
Claim 15
Dependent Claim
18 words
A projection device as claimed in claim 9 wherein said transparent support plate is a plastic non-glare plate.
Claim 16
Dependent Claim
20 words
A projection device as claimed in claim 9 wherein said transparent support plate is formed of a non-glare glass. 9
Claim 17
Dependent Claim
19 words
A projection device as claimed in claim 13 wherein said non-glare glass is provided with more than three perforations.
Claim 18
Dependent Claim
23 words
A projection device as claimed in claim 14 wherein said non-glare glass facing said film has a surface roughness of about 100 mesh.
Claim 19
Dependent Claim
21 words
A projection device as claimed in claim 14 wherein said non-glare glass is of the size of approximately 15mm in diameter.
Claim 20
Dependent Claim
22 words
A projection device as claimed in claim 9 wherein said means for blowing air comprises a nozzle disposed above said supporting plate.
Claim 21
Dependent Claim
21 words
A projection device as claimed in claim 17 wherein said nozzle is connected with the discharging outlet of said suction means.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |