US3644036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for photographic printing without a darkroom
Assignee: MERLYN O CANFIELD
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Filing: 1970-06-08
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Granted: 1972-02-22
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Expires: 1990-06-08
Abstract
Abstract A lighttight casing adapted to be connected to the lens of a conventional photographic enlarger, and a lighttight photographic paper holding container movable in and out of the lighttight casing. The paper-holding container including a focusing target on one side, an opening having a slidable close on a second side opposite said focusing target and an internal paper display area aligned with the target and the opening. The paper-holding container adapted to be manipulated such that the focusing target and the internal paper display area may be placed an equal distance from the enlarger lens. The paper-holding container including light-trapping baffles which allow fluid to flow therethrough such that a sheet of exposed paper therein may be developed by immersing the paper-holding container serially in conventional photographic developing fluid baths. A method of exposing and developing a piece of photographic paper without a darkroom.
Inventors
- 👤 Merlyn O Canfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:26
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/326
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
14 words
The apparatus of claim 1 wherein said light source is a conventional photographic enlarger.
Claim 2
Dependent Claim
21 words
The apparatus of claim 2 wherein said lighttight casing includes bellows means for adjustably connecting said casing to said photographic enlarger.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 wherein said lighttight, light-sensitive paper storage means comprises a drawer movable into and out of said casing.
Claim 4
Dependent Claim
18 words
The apparatus of claim 4 wherein the orientation of said drawer with respect to said casing is reversible.
Claim 5
Dependent Claim
24 words
The apparatus of claim 1 wherein said focusing area is substantially similar in size and color tone to the light-sensitive paper to be exposed.
Claim 6
Dependent Claim
25 words
The apparatus of claim 1 wherein said closing means for said opening comprises a plate slidable in tracks disposed on said light-sensitive paper storage means.
Claim 7
Dependent Claim
35 words
The apparatus of claim 1 wherein said light-sensitive paper display area includes a pair of spaced slots mounted internally in said light-sensitive paper storage mEans and adapted to receive opposite edges of said light-sensitive paper.
Claim 8
Dependent Claim
22 words
The apparatus of claim 1 wherein said lighttight casing includes filter-holding means adapted to hold a filter in said beam of light.
Claim 9
Dependent Claim
13 words
The apparatus of claim 1 wherein said lighttight casing includes closable viewing means.
Claim 10
Dependent Claim
26 words
The apparatus of claim 10 wherein said viewing means includes an outwardly extending eyeshade, said eyeshade being contoured to conform to the face of the viewer.
Claim 11
Dependent Claim
15 words
The apparatus of claim 1 including a manually adjustable gripping means extending through said casing.
Claim 12
Dependent Claim
19 words
The apparatus of claim 12 wherein said manually adjustable gripping means includes a flexible lighttight seal adjacent said casing.
Claim 13
Dependent Claim
22 words
The apparatus of claim 1 including means mounted externally on said casing to focus the beam of light from said light source.
Claim 14
Dependent Claim
113 words
Apparatus for exposing light-sensitive paper including a lighttight casing having a neck portion adapted to be connected to the lens of a photographic enlarger, said lighttight casing including a lighttight, light-sensitive paper storage means, said lighttight, light-sensitive paper storage means comprising a closed container having an opening on one surface thereof, said opening having a sliding close, said container including a focusing area on a second surface opposite said opening, a piece of light-sensitive paper disposed within said container and aligned with said opening, said container adapted to be reversibly disposed in said lighttight casing such that said focusing area and said light-sensitive paper may be spaced an equal distance from said lens.
Claim 15
Dependent Claim
110 words
In combination with a photographic enlarger, apparatus for printing photographic paper comprising a lighttight chamber connected to the lens of said enlarger; a photographic paper support disposed in a lighttight container, said lighttight container adapted to be positioned within said lighttight chamber, said lighttight container including a focusing area on one side and a closable opening on a second side opposite said focusing area and aligned with said photographic paper support, said photographic paper support and said focusing area adapted to be positioned an equal distance from said enlarger lens; and at least one tank adapted to hold photographic developing fluids, said lighttight container being at least partially immersible therein.
Claim 16
Dependent Claim
19 words
The apparatus of claim 16 wherein said lighttight container includes a circuitous fluid-passing channel extending through the wall thereof.
Claim 17
Dependent Claim
83 words
Apparatus for developing exposed photographic paper comprising a lighttight container having a paper-holding means disposed internally thereof adapted to hold a piece of exposed photographic paper, said container including light-blocking baffle means adapted to allow fluids to pass into and out of said container; tanks adapted to hold photographic developing fluids, said tanks being of similar shape to said container but of slightly larger cross section such that said paper-holding container may be serially disposed in said containers to develop said photographic paper.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |