Patent US4175849A successfully refreshed from Google Patents.
US4175849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic drum processor inserts
Assignee: WILKINSON PHOTOGRAPHIC PRODUCTS Ltd
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Filing: 1977-05-27
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Granted: 1979-11-27
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Expires: 1997-05-27
Abstract
Abstract A drum processor insert for use in the drum of a photographic drum processor is described which enables the capacity of the processor to be substantially increased. The insert comprises a plurality of arcuate holders each adapted to hold a sheet of photographically sensitized material, and a frame, each holder being rotatably mounted on the frame so that it is swingable about an axis, parallel to the edges of the arcuate holder, from a closed position in which the frame and holders constitute a substantially cylindrical shape which fits in the drum with the edges of the holders at the periphery of the drum, and an open position in which a sheet of photographically sensitized material can be loaded into or unloaded from each holder.
Inventors
- 👤 Peter R. S. Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:07
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/04; G03D13/046
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
181 words
A drum processor insert for use in a photographic drum processor, the insert comprising: a frame comprising a central axially extending member, and, on each end of the member, a spider having a number of equiangularly spaced arms, a plurality of arcuate holders each adapted to hold a sheet of photographically sensitised material, each arm of each spider bearing a pivot and each holder being swingably mounted about an axis between two such pivots on oppositely facing arms, all such axes being parallel and being parallel to the straight edges of the arcuate holder, and each arm of each spider being resilient so that two opposite arms may be sprung apart to release a swingable holder held between them, each holder being swingable from a closed position in which the frame and holders constitute a substantially cylindrical shape, the holders overlapping each other and the straight edges of the holders being distributed about the periphery of the cylinder, and an open position in which the face of each holder adapted to receive a sheet of photographically sensitised material can be reached.
Claim 2
Dependent Claim
181 words
A drum processor insert for use in a photographic drum processor, the insert comprising: a frame comprising a central axially extending member, and, on each end of the member, a spider having a number of equiangularly spaced arms, a plurality of arcuate holders each adapted to hold a sheet of photographically sensitised material, each arm of each spider bearing a pivot and each holder being swingably mounted about an axis between two such pivots on oppositely facing arms, all such axes being parallel and being parallel to the straight edges of the arcuate holder, and each arm of each spider being resilient so that two opposite arms may be sprung apart to release a swingable holder held between them, each holder being swingable from a closed position in which the frame and holders constitute a substantially cylindrical shape, the holders overlapping each other and the straight edges of the holders being distributed about the periphery of the cylinder, and an open position in which the face of each holder adapted to receive a sheet of photographically sensitised material can be reached.
Claim 3
Dependent Claim
24 words
The drum processor insert of claim 1 wherein one end of the frame bears means identifying it from the other end of the frame.
Claim 4
Dependent Claim
30 words
The drum processor insert of claim 1 wherein the frame comprises means to ensure that the holders may be demounted from and remounted on the frame in only one orientation.
Claim 5
Dependent Claim
23 words
The drum processor insert of claim 1 wherein each holder consists of a substantially cylindrical trough having at either side a holding strip.
Claim 6
Dependent Claim
30 words
The drum processor insert of claim 1 wherein the ends of each arcuate holder comprise means to prevent a sheet of photographically sensitised material slipping out axially from the holder.
Claim 7
Dependent Claim
32 words
The drum processor insert of claim 1 wherein each arcuate holder comprises a plate having at least one through hole against which a sheet of photographically sensitised material in the holder lies.
Claim 8
Dependent Claim
13 words
The drum processor insert of claim 1 and including six to ten holders.
Claim 9
Dependent Claim
12 words
The drum processor insert according to claim 1 and having nine holders.
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) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |