Patent US3591271A successfully refreshed from Google Patents.
US3591271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film cartridge
Assignee: Individual
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Filing: 1968-04-18
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Granted: 1971-07-06
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Expires: 1988-04-18
Abstract
Abstract A film cartridge having a continuous spirally wound loose loop of exposed and printed film ready for projection, enclosed in a case having one flat side at right angles to the plane of projection which will guide and fit into a projector with precision and with no other adjustment. The cartridge is so structured that when placed within the projector the claw mechanism of the projector will engage the conventional perforations of the film to advance the same one frame at a time, either at motion picture speed or at a controlled single frame advancement. Each cartridge has a part of the projecting system, i.e., a self-contained mirror integral with and movable with the film platen, by which the projection light is gathered and directed through the film and into the optical system. The operation includes the unwinding of the film loop from the outside of the spiral loop for projection and simultaneously rewinding the film on the inside of the loop without any pull or drag on the film.
Inventors
- 👤 Frank B Shropshire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:49
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321; G03B21/323; G03B21/325
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
A cartridge for endless developed looped film ready for projection when positioned in a projector where the film of individual frame simultaneously feeds to the projection gate from the outside of the continuous loop and rewinds to the inside thereof, in combination a closed container for said film independent of the projector, a film platen loosely mounted within said container supporting the film before, during and after projection having a gate aperture positioned to pass the light of projection therethrough and through a frame of said film presented for projection, and having a rearward angularly mirror mounted integrally and moveable with said platen completely with said platen completely within said cartridge and in alignment with said gate to direct the light for projection, and unobstructed aperture means through the wall of said cartridge in alignment with said mirror and at right angles to said gate permitting the passage of projection light therethrough when positioned for projection.
Claim 2
Dependent Claim
156 words
A cartridge for endless developed looped film ready for projection when positioned in a projector where the film of individual frame simultaneously feeds to the projection gate from the outside of the continuous loop and rewinds to the inside thereof, in combination a closed container for said film independent of the projector, a film platen loosely mounted within said container supporting the film before, during and after projection having a gate aperture positioned to pass the light of projection therethrough and through a frame of said film presented for projection, and having a rearward angularly mirror mounted integrally and moveable with said platen completely with said platen completely within said cartridge and in alignment with said gate to direct the light for projection, and unobstructed aperture means through the wall of said cartridge in alignment with said mirror and at right angles to said gate permitting the passage of projection light therethrough when positioned for projection.
Claim 3
Dependent Claim
28 words
The cartridge of claim 1 wherein the wall having the aperture means for admitting projection light is a continuous face at right angles to the plane of projection.
Claim 4
Dependent Claim
227 words
A cartridge for an endless developed spirally looped film for projection where the film loop is simultaneously fed from the outside of the loop and returned at the inside thereof, in combination a closed container for said continuous film including, a front wall defining the plane of projection, an inner wall at right angles to the plane of projection, and outer wall parallel to said inner wall having a circular turret portion offset outwardly with respect to the plane of said wall, a wall contiguous with the said front wall and joining said inner and outer walls, an unobstructed platform spaced within said circular turret and disposed substantially at the same angularity for supporting the loosely coiled loop film edgewise thereon, said platform having suitable cut away portions for the simultaneous feeding from the periphery and returning of said film on the inside of said loop, a platen resiliently mounted in said front wall having a light passing projection gate therein, a light reflecting mirror mounted within said cartridge in alignment with said gate and integral with and moveable with said platen for passing projection light through said projection gate and film at the same angle at all times, and an aperture in said inner wall aligned with said mirror to permit the passing of projection light unobstructed to the said mirror when in position for projection.
Claim 5
Dependent Claim
227 words
A cartridge for an endless developed spirally looped film for projection where the film loop is simultaneously fed from the outside of the loop and returned at the inside thereof, in combination a closed container for said continuous film including, a front wall defining the plane of projection, an inner wall at right angles to the plane of projection, and outer wall parallel to said inner wall having a circular turret portion offset outwardly with respect to the plane of said wall, a wall contiguous with the said front wall and joining said inner and outer walls, an unobstructed platform spaced within said circular turret and disposed substantially at the same angularity for supporting the loosely coiled loop film edgewise thereon, said platform having suitable cut away portions for the simultaneous feeding from the periphery and returning of said film on the inside of said loop, a platen resiliently mounted in said front wall having a light passing projection gate therein, a light reflecting mirror mounted within said cartridge in alignment with said gate and integral with and moveable with said platen for passing projection light through said projection gate and film at the same angle at all times, and an aperture in said inner wall aligned with said mirror to permit the passing of projection light unobstructed to the said mirror when in position for projection.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |