Patent US2435331A successfully refreshed from Google Patents.
US3779518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous photographic emulsion processing
Assignee: Agfa Gevaert AG
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Filing: 1972-02-10
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Granted: 1973-12-18
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Expires: 1992-02-10
Abstract
Abstract A continuous preparation of photographic emulsions by adding a plurality of individual components, the individual components being introduced continuously and successively by metering pumps. Each individual component is completely mixed with the main stream of emulsion before the next component is introduced. Mixing is carried out in a static mixing zone or alternatively by producing a secondary turbulent flow in a particularly designed mixing zone.
Inventors
- 👤 G Koepke
- 👤 Bardorff W Muller
- 👤 K Browatzki
- 👤 J Friedsan
- 👤 K Voss
- 👤 W Wasser
- 👤 W Schweicher
- 👤 H Frenken
- 👤 P Herzhoff
- 👤 H Gref
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015; B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/433; B01F25/434; B01F33/00; B01F33/80; B01F33/81; G03C2200/00; G03C2200/09; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2506; Y10T137/2509; Y10T137/8593; Y10T137/85978; Y10T137/86131; Y10T137/86163; Y10T137/86187
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
116 words
A process for the continuous preparation of photographic emulsions which are ready for casting, wherein individual emulsion components are introduced into a stream of staring emulsion at different locations in a series of closed tubular bodies and dispersed in the stream, the individual components being introduced continuously and in succession to one another by means of metering pumps, and a succession of changes in the direction of flow of the stream are caused by channeling it through a nonlinear static flow channeling element in a mixing zone in the closed tubular body downstream from where each individual component is introduced whereby each individual component is completely admixed with the stream before the next component is introduced.
Claim 2
Dependent Claim
116 words
A process for the continuous preparation of photographic emulsions which are ready for casting, wherein individual emulsion components are introduced into a stream of staring emulsion at different locations in a series of closed tubular bodies and dispersed in the stream, the individual components being introduced continuously and in succession to one another by means of metering pumps, and a succession of changes in the direction of flow of the stream are caused by channeling it through a nonlinear static flow channeling element in a mixing zone in the closed tubular body downstream from where each individual component is introduced whereby each individual component is completely admixed with the stream before the next component is introduced.
Claim 3
Dependent Claim
16 words
A process according to claim 1, wherein the admixture takes place in a static mixing zone.
Claim 4
Dependent Claim
17 words
A process according to claim 1, wherein a secondary turbulent flow is generated in the mixing zone.
Claim 5
Dependent Claim
24 words
A process according to claim 1, wherein the average residence time in the mixing zone of an introduced component is at most 50 seconds.
Claim 6
Independent Claim
103 words
An apparatus for the continuous preparation of photographic emulsions which are ready for casting, comprising a series of tubular bodies having inlets arranged at different locations between them, each of the inlets communicating through metering pumps with one or more individual emulsion component storage vessels, a mixing zone which as no parts adapted to be mechanically moved being arranged between each adjacent pair of inlets, and a spiral flow channeling element in each of the mixing zones for causing a succession of changes in the direction of flow in the mixing zones whereby each component is completely admixed before the next is introduced.
Claim 7
Independent Claim
103 words
An apparatus for the continuous preparation of photographic emulsions which are ready for casting, comprising a series of tubular bodies having inlets arranged at different locations between them, each of the inlets communicating through metering pumps with one or more individual emulsion component storage vessels, a mixing zone which as no parts adapted to be mechanically moved being arranged between each adjacent pair of inlets, and a spiral flow channeling element in each of the mixing zones for causing a succession of changes in the direction of flow in the mixing zones whereby each component is completely admixed before the next is introduced.
Claim 8
Dependent Claim
15 words
An apparatus according to claim 5, wherein the inlets are in the form of sprinklers.
Claim 9
Dependent Claim
22 words
An apparatus according to claim 5, wherein each metering pump has a common drive shaft which also drives a main stream pump.
Claim 10
Dependent Claim
30 words
An apparatus according to claim 5, comprising sensors adapted to sense the pH value and viscosity of the substantially completed emulsion and regulating system adapted to maintain these values constant.
Claim 11
Dependent Claim
20 words
An apparatus according to claim 5 comprising a measuring control vessel located before the first tubular body in the series.
Claim 12
Dependent Claim
96 words
A mixing zone for introducing a liquid additive into a flow stream comprising at least one tubular conduit, removable heads connected to each end of the tubular conduit for connecting it as part of a tubular body, an additive inlet connected to each of the heads, a spiral lead screw having helical flutes disposed about a longitudinal core rod being removably inserted within each of the tubes for generating a secondary turbulent flow within each of the tubes, and the removable heads being constructed and arranged to permit removal of the spiral lead screws for cleaning.
Claim 13
Dependent Claim
96 words
A mixing zone for introducing a liquid additive into a flow stream comprising at least one tubular conduit, removable heads connected to each end of the tubular conduit for connecting it as part of a tubular body, an additive inlet connected to each of the heads, a spiral lead screw having helical flutes disposed about a longitudinal core rod being removably inserted within each of the tubes for generating a secondary turbulent flow within each of the tubes, and the removable heads being constructed and arranged to permit removal of the spiral lead screws for cleaning.
Claim 14
Dependent Claim
43 words
A mixing zone according to claim 10, wherein the outer dimension of the flutes is slightly less than the inside dimension of the tube to form a spiral flow channel within the tube between the core and the inner wall of the tube.
Claim 15
Independent Claim
99 words
An apparatus for the continuous preparation of photOgraphic emulsions which are ready for casting, comprising a series of tubular bodies having inlets arranged at different locations between them, each of the inlets communicating through metering pumps with one or more individual emulsion component storage vessels, a mixing zone which has no parts adapted to be mechanically moved being arranged between each adjacent pair of inlets, and each mixing zone comprises two adjacent tubes arranged in hairpin-fashion in each of which is arranged a spiral flow channel having a diameter substantially identical in the internal diameter of the respective tube.
Claim 16
Independent Claim
99 words
An apparatus for the continuous preparation of photOgraphic emulsions which are ready for casting, comprising a series of tubular bodies having inlets arranged at different locations between them, each of the inlets communicating through metering pumps with one or more individual emulsion component storage vessels, a mixing zone which has no parts adapted to be mechanically moved being arranged between each adjacent pair of inlets, and each mixing zone comprises two adjacent tubes arranged in hairpin-fashion in each of which is arranged a spiral flow channel having a diameter substantially identical in the internal diameter of the respective tube.
Claim 17
Independent Claim
155 words
An apparatus for the continuous prepartion of photographic emulsions which are ready for casting, comprising a series of tubular bodies having inlets arranged at different location between them, each of the inlets communicating through metering pumps with one or more individual emulsion component storage vessels, a mixing zone which has no parts adapted to be mechanically moved being arranged between each adjacent pair of inlets, each of the mixing zones includes at least one tubular conduit, removable heads connected to each end of the conduit for connecting it as part of the tubular body, one of the inlets being connected to each of the heads, a spiral lead screw having helical flutes disposed about a longitudinal core rod being removably inserted within each of the tubes for generating a secondary turbulent flow within each of the tubes, and the removable heads being constructed and arranged to permit removal of the spiral lead screws for cleaning.
Claim 18
Independent Claim
155 words
An apparatus for the continuous prepartion of photographic emulsions which are ready for casting, comprising a series of tubular bodies having inlets arranged at different location between them, each of the inlets communicating through metering pumps with one or more individual emulsion component storage vessels, a mixing zone which has no parts adapted to be mechanically moved being arranged between each adjacent pair of inlets, each of the mixing zones includes at least one tubular conduit, removable heads connected to each end of the conduit for connecting it as part of the tubular body, one of the inlets being connected to each of the heads, a spiral lead screw having helical flutes disposed about a longitudinal core rod being removably inserted within each of the tubes for generating a secondary turbulent flow within each of the tubes, and the removable heads being constructed and arranged to permit removal of the spiral lead screws for cleaning.
Claim 19
Dependent Claim
50 words
An apparatus according to claim 12, wherein the spiral flow channel has a core and a lead along the core, and the ratio of the lead of the spiral to the distance between the core of the spiral and the inside of the tube is about 2 : 1 .
Claim 20
Dependent Claim
64 words
An apparatus according to claim 13, wherein each of the heads includes a pair of openings for connection to a pair of the tubes, one of the heads connecting one end of each of the tubes to each other, and the other of the heads including an inflow connection to one of the tubes and an outflow connection to the other of the tubes.
Claim 21
Dependent Claim
42 words
An apparatus according to claim 13, wherein the outer dimension of the flutes is slightly less than the inside dimension of the tube to form a spiral flow channel within the tube between the core and the inner wall of the tube.
Claim 22
Dependent Claim
152 words
A mixing zone for introducing a liquid additive into a flow stream comprising at least one tubular conduit, removable heads connected to each end of the tubular conduit for connecting it as part of a tubular body, an additive inlet connected to each of the heads, spiral lead screw having helical flutes disposed about a longitudinal core rod being removably inserted within each of the tubes for generating a secondary turbulent flow within each of the tubes, and the removable heads being constructed and arranged to permit removal of the spiral lead screws for cleaning, each of the heads includes a pair of openings for connection to a pair of the tubes, one of the heads connecting one end of each of the tubes to each other, and the other of the heads including an inflow connection to one of the tubes and the outflow connection to the other of the tubes.
Claim 23
Dependent Claim
152 words
A mixing zone for introducing a liquid additive into a flow stream comprising at least one tubular conduit, removable heads connected to each end of the tubular conduit for connecting it as part of a tubular body, an additive inlet connected to each of the heads, spiral lead screw having helical flutes disposed about a longitudinal core rod being removably inserted within each of the tubes for generating a secondary turbulent flow within each of the tubes, and the removable heads being constructed and arranged to permit removal of the spiral lead screws for cleaning, each of the heads includes a pair of openings for connection to a pair of the tubes, one of the heads connecting one end of each of the tubes to each other, and the other of the heads including an inflow connection to one of the tubes and the outflow connection to the other of the tubes.
Claim 24
Independent Claim
74 words
An apparatus for the continuous preparation of photographic emulsions which are ready for casting, comprising a series of tubular bodies having inlets arranged at different locations between them communicating through metering pumps with one or more individual emulsion component storage vessels, a mixing zone which has no parts adapted to be mechanically moved being arranged between each adjacent pair of inlets, and the inlets comprising tubes arranged tangential to the series of tubular bodies.
Claim 25
Independent Claim
74 words
An apparatus for the continuous preparation of photographic emulsions which are ready for casting, comprising a series of tubular bodies having inlets arranged at different locations between them communicating through metering pumps with one or more individual emulsion component storage vessels, a mixing zone which has no parts adapted to be mechanically moved being arranged between each adjacent pair of inlets, and the inlets comprising tubes arranged tangential to the series of tubular bodies.
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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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |