US3626834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic print developing unit
Assignee: Individual
•
Filing: 1969-09-16
•
Granted: 1971-12-14
•
Expires: 1989-09-16
Abstract
Abstract A photographic print developing unit comprising a housing including a cover and opposed walls for supporting a rotatable canister for developing photographic prints. The housing defines a compartment within which is placed a heater. The housing supports beakers containing the liquid chemistry to be used during the development process. The processing liquids are sequentially introduced into the canister while in a substantially vertical orientation and maintained out of contact with the print by a fluid guide element until the canister is placed in a horizontal orientation. The canister and the beakers are preheated and thereafter maintained at a uniform temperature during the development process.
Inventors
- 👤 Sebastian Speranza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:31
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/006; G03D13/02; G03D13/04; G03D13/046
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
174 words
A photographic print developing unit comprising a housing including a cover and opposed walls, a developing can supported by said housing for rotation thereon, said housing defining a compartment, a heater within said compartment, and beakers, said housing including means to rotatably support said can, said heater being mounted within said compartment so as to heat the air within said compartment, said can having a cylindrical shape, said cover surrounding said compartment and having holes through which said beakers extend so as to minimize accidental entry of liquids into said compartment and substantially close said holes, said housing including wall portions limiting movement of said can along its longitudinal axis, said can having spindles extending through said wall portions for rotation thereof, said support means for said can extending into said compartment, and said support means conforming at least in part to the exterior cylindrical shape of said can so as to provide for easy rotation of said can and so as to provide for good heat conduction between said housing and said can.
Claim 2
Dependent Claim
174 words
A photographic print developing unit comprising a housing including a cover and opposed walls, a developing can supported by said housing for rotation thereon, said housing defining a compartment, a heater within said compartment, and beakers, said housing including means to rotatably support said can, said heater being mounted within said compartment so as to heat the air within said compartment, said can having a cylindrical shape, said cover surrounding said compartment and having holes through which said beakers extend so as to minimize accidental entry of liquids into said compartment and substantially close said holes, said housing including wall portions limiting movement of said can along its longitudinal axis, said can having spindles extending through said wall portions for rotation thereof, said support means for said can extending into said compartment, and said support means conforming at least in part to the exterior cylindrical shape of said can so as to provide for easy rotation of said can and so as to provide for good heat conduction between said housing and said can.
Claim 3
Dependent Claim
33 words
The developing unit recited in claim 1 wherein beakers extend through said holes into said compartment and are supported by said cover so that portions of said beakers are disposed above said cover.
Claim 4
Dependent Claim
23 words
The developing unit recited in claim 1 wherein said spindles extend out beyond said wall portions whereby said can may be manually rotated.
Claim 5
Dependent Claim
26 words
The developing unit recited in claim 3 wherein said means supports said tank so that more than one-half of said can is disposed below said cover.
Claim 6
Dependent Claim
41 words
The developing unit recited in claim 1 wherein said support means extends into said compartment, said can includes lighttight means for pouring liquid into said can without contacting the photographic material within the can until said can is held substantially horizontally.
Claim 7
Dependent Claim
30 words
The developing unit recited in claim 5 wherein said support means is semicircular and provides a heat conductive transfer means to rapidly transfer heat from said compartment to said can.
Claim 8
Dependent Claim
98 words
For use in a photographic development process, a canister to receive photographically exposed material, said canister comprising a longitudinal, tubular wall and end wall inlet means for the flow of liquid into said tubular wall without contacting said material, said end wall inlet means being lighttight, and said tubular wall also having axially extending guide means within said canister for receiving said liquid without contacting said material, said canister also defining a reservoir at the end opposite said end wall inlet means, and said guide means being in communication with said end wall inlet means and said reservoir.
Claim 9
Dependent Claim
98 words
For use in a photographic development process, a canister to receive photographically exposed material, said canister comprising a longitudinal, tubular wall and end wall inlet means for the flow of liquid into said tubular wall without contacting said material, said end wall inlet means being lighttight, and said tubular wall also having axially extending guide means within said canister for receiving said liquid without contacting said material, said canister also defining a reservoir at the end opposite said end wall inlet means, and said guide means being in communication with said end wall inlet means and said reservoir.
Claim 10
Dependent Claim
84 words
The canister recited in claim 7 wherein said end wall inlet means has an angular opening for ease in pouring liquid into and out of said canister, said tubular wall and end wall inlet means being provided with suitable indicia to align said end wall inlet means relative to said guide means so that when said angular opEning is in approximately a horizontal plane the liquid poured into said end wall inlet means will flow directly into said guide means without contacting said material.
Claim 11
Dependent Claim
21 words
The canister recited in claim 8 wherein said canister includes stop means to limit placement of said material into said canister.
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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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |