US3745899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film cartridge
Assignee: Filmfabrik Wolfen VEB
•
Filing: 1972-01-06
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Granted: 1973-07-17
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Expires: 1992-01-06
Abstract
Abstract A cartridge is formed of a film magazine drum, a film take-up drum and intermediate structure. Each drum contains an arcuate film guide channel. The apertures of these channels, facing one another, define the film gate. One of the guide channels has an aperture to the outside, opposite the perforations of the film passing through the channel.
Inventors
- 👤 B Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:19
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
Cartridge for perforated photographic roll film comprising a magazine drum, a pickup drum, means to mutually space and rigidly interconnect said drums, an arcuate film guide channel in each drum, and an opening in the outer wall of one of these channels, in the area of the film perforations, for insertion of a pilot pin remotely of the spacing between said drums.
Claim 2
Dependent Claim
62 words
Cartridge for perforated photographic roll film comprising a magazine drum, a pickup drum, means to mutually space and rigidly interconnect said drums, an arcuate film guide channel in each drum, and an opening in the outer wall of one of these channels, in the area of the film perforations, for insertion of a pilot pin remotely of the spacing between said drums.
Claim 3
Dependent Claim
25 words
A cartridge according to claim 1 wherein the channel, directly behind the opening, also has a recess for reception of the tip of the pin.
Claim 4
Dependent Claim
24 words
A cartridge according to claim 1, constructed and arranged so that said drums, when installed in the camera, are disposed behind the image plane.
Claim 5
Dependent Claim
28 words
A cartridge according to claim 1, wherein said drums have shoulders fitting the aperture member of a camera, each shoulder having an opening for passage of the film.
References Cited (Backward Citations)
US3523496A
Cited
US3650489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |