Patent US2315127A successfully refreshed from Google Patents.
US4121236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aperture card camera with device for spraying the exposed film
Assignee: Microbox Dr Welp GmbH and Co
•
Filing: 1976-06-28
•
Granted: 1978-10-17
•
Expires: 1996-06-28
Abstract
Abstract An aperture card camera is provided with a spraying device for supplying to the exposed film a liquid such as a developer or the like. The liquid is sucked from an open supply container which is under atmospheric pressure. The liquid is then delivered to the developing chamber by a double action membrane pump. The membrane pump may comprise membranes which function as pump membranes and as valve membranes.
Inventors
- 👤 Ulrich Welp
- 👤 Gero Sellien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:00
CPC Classifications
G; G03; G03D; G03D5/00; G03D5/04; G03D3/00; G03D3/02; G03D3/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
197 words
An apparatus for spraying an exposed film with processing liquid under pressure, said processing liquid including developer, fixer and water or fixer-developer and water, comprising container means for said processing liquid, processing means including a developing chamber and spraying nozzle means in said developing chamber, pump means including constant volume pump chamber means, suction pipe means operativelyinterconnecting said container means to said constant volume pump chamber means, pressure pipe means operatively connecting said nozzle means to said constant volume pump chamber means for conveying processing liquid under pressure from said container means to said nozzle means, said pump means further comprising first cover plate means, and second cover plate means as well as intermediate pump disc means operatively held in position between said first and second cover plate means to form said constant volume pump chamber means, first membrane means operatively clamped in position between said first cover plate means and said intermediate pump disc means, second membrane means operatively clamped between the intermediate pump disc means and said second cover plate means, pump operating conduit means, and controllable valve means operatively connecting said pump operating conduit means to said pump means for operating the pump means.
Claim 2
Independent Claim
197 words
An apparatus for spraying an exposed film with processing liquid under pressure, said processing liquid including developer, fixer and water or fixer-developer and water, comprising container means for said processing liquid, processing means including a developing chamber and spraying nozzle means in said developing chamber, pump means including constant volume pump chamber means, suction pipe means operativelyinterconnecting said container means to said constant volume pump chamber means, pressure pipe means operatively connecting said nozzle means to said constant volume pump chamber means for conveying processing liquid under pressure from said container means to said nozzle means, said pump means further comprising first cover plate means, and second cover plate means as well as intermediate pump disc means operatively held in position between said first and second cover plate means to form said constant volume pump chamber means, first membrane means operatively clamped in position between said first cover plate means and said intermediate pump disc means, second membrane means operatively clamped between the intermediate pump disc means and said second cover plate means, pump operating conduit means, and controllable valve means operatively connecting said pump operating conduit means to said pump means for operating the pump means.
Claim 3
Dependent Claim
121 words
The apparatus of claim 1, wherein said constant volume pump chamber means are formed in said intermediate pump disc with two chamber sections of different diameters, said pump means further comprising a differential pump piston including two sections with correspondingly different diameters operatively fitting into the respective pump chamber section, said first and second membrane means cooperating with said differential pump piston for operating the latter, and wherein said valve means comprise magnetically operated valve means which connect said pump operating conduit means to said pump chamber sections for actuating said differential piston through said first and second membrane means, said pump means further comprising check valve means operatively inserted in said pressure pipe means and in said suction pipe means.
Claim 4
Dependent Claim
68 words
The apparatus of claim 1, wherein said pump is a differential pressure membrane pump, said first membrane means cooperating with said first cover plate means and with said intermediate pump disc means to form two membrane valves, and wherein said second membrane means cooperates with said second cover plate means and with said intermediate pump disc means to operate as a pumping membrane in said pump chamber means.
Claim 5
Dependent Claim
63 words
The apparatus of claim 3, wherein said pump operating conduit means comprise a pressure conduit (44) and a suction conduit (45) and wherein said controllable valve means comprise a first magnetically operable valve, connecting one of said membrane valves to said pressure conduit, and a second magnetically operable valve connecting the other membrane valve to said suction conduit or to said pressure conduit.
Claim 6
Dependent Claim
59 words
The apparatus of claim 4, wherein both membrane valves are operatively connected to said pump chamber means, one membrane valve connecting said pump chamber means through said pressure pipe means to said spraying nozzle means in said developing chamber means, whereas the other membrane valve connects said pump chamber means through said suction pipe means to said container means.
Claim 7
Dependent Claim
30 words
The apparatus of claim 4, further comprising conduit means (51) connecting said second magetically operable valve also to said pump membrane on its side facing said second cover plate means.
Claim 8
Dependent Claim
20 words
The apparatus of claim 4, further comprising pipe means connecting said second magnetically operable valve to said pressure conduit means.
Claim 9
Dependent Claim
20 words
The apparatus of claim 1, further comprising heating elements operatively inserted into said pump means for heating the pump means.
Claim 10
Dependent Claim
19 words
The apparatus of claim 1, wherein a plurality of said pump means are combined in a common pump block.
References Cited (Backward Citations)
US2619907A
Cited
US2635545A
Cited
US2922352A
Cited
US3143943A
Cited
US3027821A
Cited
US2981170A
Cited
US3149550A
Cited
US3194170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |