US4466722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film developing apparatus having continuous circulation of developing liquids
Assignee: EVA STAUDE SOEDELER WEG 2 Firma
•
Filing: 1982-09-28
•
Granted: 1984-08-21
•
Expires: 2002-09-28
Abstract
Abstract An apparatus for the development of microfilm passes film successively through different work stations, such as the developer bath, fixing bath, preliminary washing bath, second washing bath and a drying stage. The film moves in a horizontally arranged track with the aid of a motor driven pair of rolls. The apparatus is characterized by a liquid circulation system in which each vessel supplying a liquid station with a liquid and designed as a transport container is equipped with a supply line and a suction line. The suction line moves the liquid to a bath by means of a liquid pump and by way of pressure lines through a heating means. A bath may be associated with each work station. In the bath the liquid is sprayed against the bottom side of the film travelling in the horizontal direction and is returned through a liquid and film guiding body and the supply line into the vessel.
Inventors
- 👤 Eckhardt Staude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:24
CPC Classifications
G; G03; G03D; G03D5/00; G03D5/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
128 words
An apparatus for the development of microfilm comprising: a plurality of work stations arranged along a work path; a horizontal track for transporting film along the work path; means for moving said film in said horizontal track said means including a plurality of rollers and a drive motor; a plurality of fluid flow circuits each circuit comprising a fluid holding vessel, a suction line, means for providing suction in said suction line, a pressure line, means for providing pressure in said pressure line, means for heating said pressure line, a bath disposed in at least one of said work stations, means for spraying said film in said bath, a liquid and film guiding body in said bath and return conduit from said bath to said fluid holding vessel.
Claim 2
Independent Claim
128 words
An apparatus for the development of microfilm comprising: a plurality of work stations arranged along a work path; a horizontal track for transporting film along the work path; means for moving said film in said horizontal track said means including a plurality of rollers and a drive motor; a plurality of fluid flow circuits each circuit comprising a fluid holding vessel, a suction line, means for providing suction in said suction line, a pressure line, means for providing pressure in said pressure line, means for heating said pressure line, a bath disposed in at least one of said work stations, means for spraying said film in said bath, a liquid and film guiding body in said bath and return conduit from said bath to said fluid holding vessel.
Claim 3
Dependent Claim
26 words
The apparatus for developing microfilm of claim 1, wherein said work stations comprise a developing station, a fixing station, two washing stations and a drying station.
Claim 4
Dependent Claim
24 words
The apparatus for developing microfilm of claim 2, wherein a separate fluid flow circuit communicates with each of said developing, fixing and washing stations.
Claim 5
Dependent Claim
31 words
The apparatus for developing microfilm of claim 3, wherein said means for providing suction and said means for providing pressure comprises a fluid pump connecting said suction and said pressure lines.
Claim 6
Dependent Claim
49 words
The apparatus for developing microfilm of claim 4, wherein said means for heating said pressure line comprises a housing, a quartz sand compartment in said housing, a heat exchanger disposed in said compartment, a heating rod centrally located in said housing and said pressure line extending through said housing.
Claim 7
Dependent Claim
28 words
The apparatus for developing microfilm of claim 5, wherein said means for spraying said film comprises a spray nozzle located below the film moving in said horizontal track.
Claim 8
Dependent Claim
23 words
The apparatus for developing microfilm of claim 6, wherein said fluid pump is independently connected to each of said suction and pressure lines.
Claim 9
Dependent Claim
22 words
The apparatus for developing microfilm of claim 7, wherein said heating means comprises each of said pressure lines extending through said housing.
Claim 10
Dependent Claim
36 words
The apparatus for developing microfilm of claim 8, wherein said liquid and film guide body comprises an H-shaped member, the upper extending members supporting guides for said film, the lower extending members supporting said spray nozzle.
Claim 11
Dependent Claim
29 words
The apparatus for developing microfilm of claim 9, wherein the distance of said upper extending members of said H-shaped member is slightly smaller than the width of said film.
Claim 12
Dependent Claim
33 words
The apparatus for developing microfilm of claim 10, wherein said liquid and film guide body is of a length which is always smaller than the length of the bath in the work station.
Claim 13
Dependent Claim
42 words
The apparatus for developing microfilm of claim 11, further comprising an upper transverse member in each of said developing bath and second washing bath disposed above said horizontal track and a spray nozzle in each upper transverse member for spraying said film.
Claim 14
Dependent Claim
28 words
The apparatus for developing microfilm of claim 12, wherein one of said lines has a temperature control means for regulation of the heat output of said heating rod.
Claim 15
Dependent Claim
28 words
The apparatus for developing microfilm of claim 13, wherein said motor and rollers are arranged in front of the first work station for the transport of the film.
References Cited (Backward Citations)
US2177706A
Cited
US3372630A
Cited
US3545364A
Cited
US3688677A
Cited
US3635144A
Cited
US3744394A
Cited
DE2218369A1
Cited
US3873988A
Cited
FR2248538A1
Cited
US4104668A
Cited
US4101919A
Cited
US4187023A
Cited
US4327988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |