US3850643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making coupler dispersions
Assignee: Eastman Kodak Co
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Filing: 1973-05-04
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Granted: 1974-11-26
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Expires: 1993-05-04
Abstract
Abstract A method and apparatus relate to mixing solutions in which a well-stirred coupler/coupler solvent mixture is fed through a tube to an annular, flow-restriction plate arranged within an aqueous gelatin bulk mixture. A rotatable impeller is mounted in spaced relation to the plate and pumps the gelatin bulk mixture through the central opening or aperture in the plate and into the gap between the plate and the impeller. The impeller is provided with a number of concentric recesses interconnected by radial slots forming a circuitous path to the peripheral edge thereof. The flows of coupler/coupler solvent and gelatin bulk mixture are broken up by the radial slots and the annular recesses in conjunction with the fluid shear developed at the peripheral edge of the impeller.
Inventors
- 👤 B Johnson
- 👤 S Royal
- 👤 R Ackerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:44
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/40; B01F23/43; G; G03; G03C; G03C7/00; G03C7/30; G03C7/388
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A METHOD OF PREPARING A GENERLLY UNIFORM AND CRYSTALFREE COUPLER DISPERSION HAVING A PARTICLE SIZE OF 1 MICRON OR LESS WHICH COMPRISES THE STEPS OF: INTRODUCING A FLOW OF COUPLER/COUPLER SOLVENT SOLUTION INTO AN OPEN-END GAP FORMED BY THE FACIG SURFACES OF A ROTATABLE PLATE MEMBER AND A FIXED MEMBER HAVING A CENTRAL OPENING AND ARRANGED IN AN AQUEOUS GELATIN SOLUTION, THE FACING SURFACE OF AT LEAST ONE OF SAID MEMBERS BEING PROVIDED WITH RECESSES FORMING A CIRCUITOUS PATH FROM THE CENTER TO THE PERIPHERAL EDGE THEREOF; AND MAINTAINING A FLOW OF SAID AQUEOUS GELATIN SOLUTION THROUGH SAID OPENING; WHEREBY THE FLOWS OF SAID COUPLER/COUPLER SOLVENT SOLUTION AND OF SAID AQUEOUS GELATIN SOLUTION ARE THOUROUGHLY MIXED DURING MOVEMENT THROUGH SAID GAP AND SAID PATH OF THE OPEN-END OF SAID GAP FOR EXPULSION INTO SAID AQUEOUS GELATIN SOLUTION.
Claim 2
Independent Claim
137 words
A METHOD OF PREPARING A GENERLLY UNIFORM AND CRYSTALFREE COUPLER DISPERSION HAVING A PARTICLE SIZE OF 1 MICRON OR LESS WHICH COMPRISES THE STEPS OF: INTRODUCING A FLOW OF COUPLER/COUPLER SOLVENT SOLUTION INTO AN OPEN-END GAP FORMED BY THE FACIG SURFACES OF A ROTATABLE PLATE MEMBER AND A FIXED MEMBER HAVING A CENTRAL OPENING AND ARRANGED IN AN AQUEOUS GELATIN SOLUTION, THE FACING SURFACE OF AT LEAST ONE OF SAID MEMBERS BEING PROVIDED WITH RECESSES FORMING A CIRCUITOUS PATH FROM THE CENTER TO THE PERIPHERAL EDGE THEREOF; AND MAINTAINING A FLOW OF SAID AQUEOUS GELATIN SOLUTION THROUGH SAID OPENING; WHEREBY THE FLOWS OF SAID COUPLER/COUPLER SOLVENT SOLUTION AND OF SAID AQUEOUS GELATIN SOLUTION ARE THOUROUGHLY MIXED DURING MOVEMENT THROUGH SAID GAP AND SAID PATH OF THE OPEN-END OF SAID GAP FOR EXPULSION INTO SAID AQUEOUS GELATIN SOLUTION.
Claim 3
Dependent Claim
31 words
The method in accordance with claim 1 wherein said flows are mixed centrifugally and expelled from the open end of said gap as a continuous flow into said aqueous gelatin solution.
Claim 4
Dependent Claim
30 words
The method in accordance with claim 1 wherein the flow of said coupler/coupler solvent solution is introduced generally centrally of the flow of said aqueous gelatin solution through said opening.
Claim 5
Dependent Claim
29 words
The method in accordance with claim 1 wherein the flow of said coupler/coupler solvent solution is maintained by the vacuum created in said gap by said rotatable plate member.
Claim 6
Dependent Claim
26 words
The method in accordance with claim 1 wherein the flow of said aqueous gelatin solution into said gap surrounds the flow of said coupler/coupler solvent solution.
Claim 7
Dependent Claim
17 words
The method in accordance with claim 4 wherein the created vacuum is at least 30 inches water.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |