Patent US3773409A successfully refreshed from Google Patents.
US3773409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container for photographic film or the like
Assignee: Agfa Gevaert AG
•
Filing: 1972-04-21
•
Granted: 1973-11-20
•
Expires: 1992-04-21
Abstract
Abstract A container for convoluted photographic film has a housing which is provided with an opening for introduction or withdrawal of film. A light trap which is inwardly adjacent to the opening includes a roller which is provided with axially parallel peripheral ribs and a block having a concave surface which is adjacent to a portion of the peripheral surface of the roller to form therewith an arcuate channel wherein the film advances on its way into or from the chamber. The concave surface of the block is provided with several recesses separated by partitions which form a labyrinth for total reflection of light which happens to penetrate into the channel. At least the roller can be withdrawn from the housing to thus enlarge the passage through which the film can be withdrawn from the interior of the housing so that the container can be used for storage of unexposed film in a motion picture camera or as a receptacle for exposed film in a motion picture projector or as a device for storage of rolls of exposed and developed photographic film.
Inventors
- 👤 J Pfeifer
- 👤 H Eigner
- 👤 W Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:24
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/26; G03B17/265
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
A container, particularly for storage of photographic film or analogous strip-shaped flexible material, comprising a housing defining at least one internal chamber and having an opening through which the material can be introduced into and withdrawn from said chamber; and a light trap provided in said housing in the region of said opening, said light trap including a first light intercepting element having a convex surface and a second light intercepting element having a concave surface, at least a portion of one of said surfaces being closely adjacent to the other of said surfaces to form therewith an arcuate channel for the passage of strip-shaped material on its way toward and from said chamber, said second light intercepting element including a plurality of cells having open sides facing said convex surface, said cells together forming a labyrinth including a plurality of partitions having edge faces forming part of said concave surface and defining a plurality of discrete recesses, at least some of said partitions being offset relative to each other.
Claim 2
Dependent Claim
170 words
A container, particularly for storage of photographic film or analogous strip-shaped flexible material, comprising a housing defining at least one internal chamber and having an opening through which the material can be introduced into and withdrawn from said chamber; and a light trap provided in said housing in the region of said opening, said light trap including a first light intercepting element having a convex surface and a second light intercepting element having a concave surface, at least a portion of one of said surfaces being closely adjacent to the other of said surfaces to form therewith an arcuate channel for the passage of strip-shaped material on its way toward and from said chamber, said second light intercepting element including a plurality of cells having open sides facing said convex surface, said cells together forming a labyrinth including a plurality of partitions having edge faces forming part of said concave surface and defining a plurality of discrete recesses, at least some of said partitions being offset relative to each other.
Claim 3
Dependent Claim
28 words
A container as defined in claim 1, wherein one of said light intercepting elements is mounted in said housing for movement relative to the other of said elements.
Claim 4
Dependent Claim
27 words
A container as defined in claim 2, wherein said one light intercepting element is a roller and said convex surface is the peripheral surface of said roller.
Claim 5
Dependent Claim
22 words
A container as defined in claim 3, wherein said concave surface is adjacent to a relatively small portion of said peripheral surface.
Claim 6
Dependent Claim
15 words
A container as defined in claim 3, wherein said peripheral surface is provided with grooves.
Claim 7
Dependent Claim
21 words
A container as defined in claim 5, wherein said grooves are at least substantially parallel to the axis of said roller.
Claim 8
Dependent Claim
34 words
A container as defined in claim 1, wherein at least one of said light intercepting elements consists at least in part of elastomeric material and the respective surface is provided on said elastomeric material.
Claim 9
Dependent Claim
27 words
A container as defined in claim 7, wherein said one element includes a roller and said elastomeric material forms a layer around the periphery of said roller.
Claim 10
Dependent Claim
26 words
A container as defined in claim 1, further comprising mounting means provided in said housing for separably supporting at least one of said light intercepting elements.
Claim 11
Dependent Claim
33 words
A container as defined in claim 1, further comprising a rotary spool provided in said chamber and having flange means adjacent to that end of said channel which is remote from said opening.
References Cited (Backward Citations)
US1863066A
Cited
US2007468A
Cited
US2152369A
Cited
US2597176A
Cited
US2844991A
Cited
US3275253A
Cited
US3672290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |