US4185911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic enlargement and development apparatus
Assignee: Individual
•
Filing: 1978-07-28
•
Granted: 1980-01-29
•
Expires: 1998-07-28
Abstract
Abstract A device for enlargement and development of photographs and particularly adapted to efficiently produce posters in a conventional darkroom and to efficiently develop photographs of different sizes. This device includes a posting pegboard, pegs, and clips to hold photographic sheet material in a single vertical position while producing an enlarged print or poster thereon, developing the print, and rinsing the developed print. A sink is operatively associated to the posting board and includes a trough underlying the latter to collect the drips from the wet prints. The sink includes transverse channels with dividing partitions tightly fitting in these channels and separating the sink into a plurality of basins for development of photographic prints. A lattice rests on a peripheral flange of the sink to form a two-level arrangement with the sink for more versatile handling of prints and use of the device.
Inventors
- 👤 Rejean Guillemette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:07
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
136 words
A photographic enlargement and development device comprising an upstanding posting board dimensioned to accommodate a relatively large photographic paper against one face thereof and defining a bottom edge, clips fixable to said posting board and removably affixing photographic print material against said one face, a trough underlying said bottom edge and operatively collecting drip from any developed print posted wet against said one face, a sink unit having a drain, a main cavity defining a basin area, an elongated secondary cavity extending lengthwise along one side of said basin area, forming said trough, and communicating with said main cavity and said drain, and a lattice operatively resting on said sink unit, overlying said main cavity, forming a pervious support for resting photographic development accessories thereon, and having predetermined apertures therethrough allowing access to said main cavity.
Claim 2
Dependent Claim
136 words
A photographic enlargement and development device comprising an upstanding posting board dimensioned to accommodate a relatively large photographic paper against one face thereof and defining a bottom edge, clips fixable to said posting board and removably affixing photographic print material against said one face, a trough underlying said bottom edge and operatively collecting drip from any developed print posted wet against said one face, a sink unit having a drain, a main cavity defining a basin area, an elongated secondary cavity extending lengthwise along one side of said basin area, forming said trough, and communicating with said main cavity and said drain, and a lattice operatively resting on said sink unit, overlying said main cavity, forming a pervious support for resting photographic development accessories thereon, and having predetermined apertures therethrough allowing access to said main cavity.
Claim 3
Dependent Claim
172 words
A photographic enlargement and development device as defined in claim 1, wherein said main cavity extends longitudinally along said elongated secondary cavity, said cavities laterally communicate with said drain and with each other at one end of the cavities and removable partitions operatively extend longitudinally transverse to said cavities and selectively subdivide the main cavity into a plurality of adjacent basins, said sink unit forms an abutment flange peripherally extending around said basin area and operatively carrying said lattice, said main cavity has a bottom sloping down longitudinally thereof toward said one end, said removable partitions are arranged in cascade relative to each other down toward said one end, said bottom of the main cavity is formed with depressions therein, allowing pinching the edge of photographic prints on said bottom, said sink unit forms spraying nozzles in the upstream end of said main cavity, a hot and cold water supply is fixed to said sink unit adjacent said drain, and each of said posting board and sink unit constitutes a shallow body.
Claim 4
Dependent Claim
99 words
A photographic enlargement and development device as defined in claim 2, wherein said posting board constitutes a pegboard having a plurality of recesses extending in said one face thereof, and further including plastic plugs secured into said recesses and each defining a cavity opening at said one face, pegs frictionally engaging into the cavities defined by said plastic plugs, a string tied to each peg, a clip attached to the other end of the string, and said strings are windable around said pegs respectively for taut holding of said strings, clips, and the photographic paper held by the clips.
Claim 5
Dependent Claim
75 words
A photographic enlargement and development device as defined in claims 1, 2, or 3, wherein said posting board has a flat outer surface to allow pre-focusing and cropping of an illuminated image projected thereon and to then allow securing an unexposed photographic paper against said flat outer surface and exposing of said photographic paper with said image and to further allow development of the exposed photographic paper while the latter remains secured to said board.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |