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US4479710A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus for storing, transporting and exposing photosensitive film for camera

Assignee: Visual Graphics Corp
•
Filing: 1983-04-11
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Granted: 1984-10-30
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Expires: 2003-04-11
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Abstract

Abstract Apparatus for storing, transporting, and exposing photosensitive film is disclosed in which a camera supports a table along which a carriage is slidable. The carriage serves to store and feed out lengths of film into a camera exposure station. A vacuum bar is carried by the table at one end thereof so as to underlie one margin of the film. A source of vacuum is connected to the vacuum bar. A sheet of flexible plastic material overlying a translucent platen for the camera is located at the exposure station. Application of vacuum to the vacuum bar causes the film to be flattened against the platen by atmospheric pressure for film exposure.

Inventors

  • 👤 Quentin D. Vaughan

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 05:04
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/48; G03B17/50; G03B27/00; G03B27/32; G03B27/323; G03B27/52; G03B27/58; G03B27/60

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 298 words
Apparatus for use in combination with a camera having an object plane and an image plane comprising: a. an elongated table coupled to the camera having a top surface parallel to the image plane of the camera; b. a film transport section slidably carried on the table at one end thereof; c. a light tight cassette on the transport section; d. a supply of imaging film in said cassette; e. means carried by the transport section to advance at least a portion of the imaging film from the cassette on to the table; f. a transparent platen carried by the table to receive light directed through the camera from the object plane; g. an elongated flexible sheet of light filtering material yieldably secured at one end within the transport section and adapted to be extended from said transport section along the table to overlie the platen; h. control means to advance the imaging film across the table and beneath the light filtering material to overlie the platen; i. a vacuum bar carried by the table adjacent the platen and beneath the elongated flexible sheet; j. an elongated groove between the platen and the vacuum bar; k. a fitting to couple a vacuum source to said groove; l. valve means to control the vacuum source to evacuate air from the space between the flexible sheet and the platen to first create a pressure differential across the said flexible sheet in the area above the elongated groove to bring the film into contact upon the platen in said area and thereafter squeegee the remaining air out of the space between the flexible sheet and the platen; and m. means, including said valve means, to interrupt the vacuum source and release the atmospheric pressure against the flexible sheet and the film.
Claim 2
Dependent Claim 298 words
Apparatus for use in combination with a camera having an object plane and an image plane comprising: a. an elongated table coupled to the camera having a top surface parallel to the image plane of the camera; b. a film transport section slidably carried on the table at one end thereof; c. a light tight cassette on the transport section; d. a supply of imaging film in said cassette; e. means carried by the transport section to advance at least a portion of the imaging film from the cassette on to the table; f. a transparent platen carried by the table to receive light directed through the camera from the object plane; g. an elongated flexible sheet of light filtering material yieldably secured at one end within the transport section and adapted to be extended from said transport section along the table to overlie the platen; h. control means to advance the imaging film across the table and beneath the light filtering material to overlie the platen; i. a vacuum bar carried by the table adjacent the platen and beneath the elongated flexible sheet; j. an elongated groove between the platen and the vacuum bar; k. a fitting to couple a vacuum source to said groove; l. valve means to control the vacuum source to evacuate air from the space between the flexible sheet and the platen to first create a pressure differential across the said flexible sheet in the area above the elongated groove to bring the film into contact upon the platen in said area and thereafter squeegee the remaining air out of the space between the flexible sheet and the platen; and m. means, including said valve means, to interrupt the vacuum source and release the atmospheric pressure against the flexible sheet and the film.
Claim 3
Dependent Claim 35 words
Apparatus according to claim 1 in which the flexible sheet is embossed to provide a plurality of closely spaced depending protuberances extending from the plane of the flexible sheet in the direction of the film.
Claim 4
Dependent Claim 17 words
Apparatus according to claim 2 in which the protuberances overlie substantially the entire surface of the platen.
Claim 5
Dependent Claim 21 words
Apparatus according to claim 2 in which the flexible sheet is provided with a peripheral flat strip around the embossed portion.
Claim 6
Dependent Claim 27 words
Apparatus according to claim 2 in which a thin, elongated strip of material is secured along each of the longitudinal margins of the platen, extending upwardly therefrom.
Claim 7
Dependent Claim 19 words
Apparatus according to claim 2 in which the protuberances are in the form of staggered rows of elongated dimples.
Claim 8
Dependent Claim 28 words
Apparatus according to claim 6 in which the dimples are of the order of 0.750 inch long and 0.125 inch wide, having a radius at each end thereof.
Claim 9
Dependent Claim 29 words
Apparatus according to claim 1 in which the flexible sheet has a surface in the form of a hair cell pattern on one side thereof and facing the platen.
Claim 10
Dependent Claim 47 words
Apparatus according to claim 1 in which the vacuum bar is formed with a stepped flanged portion to receive the platen thereon in spaced relationship to the rest of the said vacuum bar, whereby an elongated transverse groove is provided between the vacuum bar and said platen.
Claim 11
Dependent Claim 27 words
Apparatus according to claim 9 in which the vacuum bar is formed with an interior chamber in communication with the groove and connected to the valve means.

References Cited (Backward Citations)

US2415424A Cited
US2751814A Cited
US3055266A Cited
US3259046A Cited
US3398638A Cited
US3536401A Cited
US3689150A Cited
US4408872A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-10-30 1988-04-30 1988-10-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-10-30 1992-04-30 1992-10-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-10-30 1996-04-30 1996-10-30 $7700.00 Window Closed / Lapsed

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