US3926664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for deaerating a circuit for the transport of liquids
Assignee: Agfa Gevaert NV
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Filing: 1973-08-30
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Granted: 1975-12-16
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Expires: 1993-08-30
Abstract
Abstract A method for the deaeration of a liquid circuit, wherein the deaeration occurs by establishing a reduced pressure in said circuit for rarefying air or other gases present therein, by producing a saturated vapor at a pressure which is higher than the reduced pressure but lower than the atmospheric pressure and maintaining a current of said vapor through said circuit for expelling said rarefied air or other gases therefrom, and thereafter pumping a deaerated liquid through the circuit for expelling the vapor therefrom.
Inventors
- 👤 Jan Baptist Verreydt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/025; B; B01; B01D; B01D19/00; B01D19/0036; B01D19/0068; G03C1/74; G03C2001/7437; G03C2001/744; G03C2200/00; G03C2200/09; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/4238; Y10T137/4245; Y10T137/4259
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
METHOD FOR DEAERATING A CIRCUIT FOR THE TRANSPORT OF LIQUIDS, IN PARTICULAR OF PHOTOGRAPHIC SUSPENSIONS, COMPRISING THE STEPS OF: A. ESTABLISHING A REDUCED PRESSURE IN SAID CIRCUIT FOR RAREFYING AIR OR OTHER PRESENT THEREIN, B. PRODUCING A SATURATED VAPOR AT A PRESSURE WHICH IS HIGHER THAN SAID REDUCED PRESSURE UNDER (A) BUT LOWER THAN THE ATMOSPHERIC PRESSURE, AND PASSING A CURRENT OF SAID VAPOR THROUGH SAID CIRCUIT FOR EXPELLING SAID RAREFIED AIR OR OTHER GASES FROM SAID CIRCUIT, AND C. THEREAFTER PUMPING A DEAERATED LIQUID THROUGH THE CIRCUIT FOR EXPELLING THE VAPOR THEREFROM.
Claim 2
Dependent Claim
93 words
METHOD FOR DEAERATING A CIRCUIT FOR THE TRANSPORT OF LIQUIDS, IN PARTICULAR OF PHOTOGRAPHIC SUSPENSIONS, COMPRISING THE STEPS OF: A. ESTABLISHING A REDUCED PRESSURE IN SAID CIRCUIT FOR RAREFYING AIR OR OTHER PRESENT THEREIN, B. PRODUCING A SATURATED VAPOR AT A PRESSURE WHICH IS HIGHER THAN SAID REDUCED PRESSURE UNDER (A) BUT LOWER THAN THE ATMOSPHERIC PRESSURE, AND PASSING A CURRENT OF SAID VAPOR THROUGH SAID CIRCUIT FOR EXPELLING SAID RAREFIED AIR OR OTHER GASES FROM SAID CIRCUIT, AND C. THEREAFTER PUMPING A DEAERATED LIQUID THROUGH THE CIRCUIT FOR EXPELLING THE VAPOR THEREFROM.
Claim 3
Dependent Claim
50 words
Method according to claim 1, wherein the produced saturated vapor is admitted to the circuit through a conduit comprising an extra resistance whereby the rate of flow of the vapor is controlled and the pressure drop in the circuit is displaced in the direction of the source of saturated vapor.
Claim 4
Dependent Claim
11 words
Method according to claim 1, wherein said vapor is water vapor.
Claim 5
Dependent Claim
32 words
Method according to claim 1, wherein the temperature of the produced vapor is higher than the temperature of the deaerated liquid which is pumped through the circuit for expelling the vapor therefrom.
Claim 6
Dependent Claim
19 words
Method according to claim 1, wherein said deaerated liquid is the process liquid to be transported through the circuit.
Claim 7
Dependent Claim
31 words
Method according to claim 1, wherein said deaerated liquid is a rinsing liquid which is pumped through the circuit prior to the admittance thereto of the process liquid to be transported.
Claim 8
Dependent Claim
46 words
Method according to claim 1, wherein said circuit terminates at a station for coating the transported liquid onto a moving web, and wherein the liquid outlet of said station is adapted to be put into connection with a vacuum conduit for performing steps (a) and (b).
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |