Patent US3977218A successfully refreshed from Google Patents.
US3977218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Washing and drying plant-devoid of any isolating valve
Assignee: Ama Universal SpA
•
Filing: 1976-05-13
•
Granted: 1976-08-31
•
Expires: 1996-05-13
Abstract
Abstract Disclosed herein is a washing and drying plant for dry cleaning machines. The plant in question is formed by two concatenated circuits, one of which for the washing and the other for the drying of the treated garments and both terminate at a washing tank positioned at a level higher than that of the rest of the plant. Once the cycle has ended and the access door to the washing tank has been opened, it is possible in this way to prevent, without the intermediary of any isolating valve, the solvent gases built up during the operating cycles which, on account of their weight, remain inside the plant, from issuing therefrom.
Inventors
- 👤 Guido Zucchini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:46
CPC Classifications
D; D06; D06F; D06F43/00; D06F43/02; D06F43/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
278 words
An apparatus for cleaning and drying which is free of cut-off valves, the apparatus comprising, in combination: a constant circulation solvent cleaning circuit free of cut-off valves and having a solvent tank for holding solvent, a pump for drawing and circulating solvent from said tank, a solvent filter for filtering solvent drawn by said pump, a wash tank having an inlet connected to said solvent filter and an outlet connected to said solvent tank, said wash tank being positioned at a level higher than both said solvent tank and said filter for solvent drawn by said pump, and a second filter for filtering solvent exiting from said wash tank; and a garment drying and solvent recovering circuit free of cut-off valves and having a fan with an intake and an outlet, said intake being connected to said solvent tank above expected maximum level of solvent and being positioned at a higher level than said solvent tank, a condenser positioned at a higher level than said solvent tank, said outlet of said fan being connected to said condenser, a separator having an inlet connected to said condenser and an outlet connected to said solvent tank, an air heater having an intake which is connected to said condenser and an outlet, said wash tank having an additional inlet connected to said outlet of said air heater, said wash tank also being positioned at a higher level than said fan, said condenser, said separator and said air heater, and a fluff trap filter positioned adjacent said intake of said fan for filtering the fluid arriving at said fan, said fluff trap being positioned at a level lower than said wash tank.
Claim 2
Independent Claim
278 words
An apparatus for cleaning and drying which is free of cut-off valves, the apparatus comprising, in combination: a constant circulation solvent cleaning circuit free of cut-off valves and having a solvent tank for holding solvent, a pump for drawing and circulating solvent from said tank, a solvent filter for filtering solvent drawn by said pump, a wash tank having an inlet connected to said solvent filter and an outlet connected to said solvent tank, said wash tank being positioned at a level higher than both said solvent tank and said filter for solvent drawn by said pump, and a second filter for filtering solvent exiting from said wash tank; and a garment drying and solvent recovering circuit free of cut-off valves and having a fan with an intake and an outlet, said intake being connected to said solvent tank above expected maximum level of solvent and being positioned at a higher level than said solvent tank, a condenser positioned at a higher level than said solvent tank, said outlet of said fan being connected to said condenser, a separator having an inlet connected to said condenser and an outlet connected to said solvent tank, an air heater having an intake which is connected to said condenser and an outlet, said wash tank having an additional inlet connected to said outlet of said air heater, said wash tank also being positioned at a higher level than said fan, said condenser, said separator and said air heater, and a fluff trap filter positioned adjacent said intake of said fan for filtering the fluid arriving at said fan, said fluff trap being positioned at a level lower than said wash tank.
Claim 3
Dependent Claim
46 words
An apparatus for cleaning and drying according to claim 1, further including a still for purifying solvent, said still having an inlet connected to said solvent tank and an outlet connected to said condenser, said still being positioned at a lower level than said wash tank.
Claim 4
Dependent Claim
56 words
An apparatus for cleaning and drying according to claim 2, wherein said second filter for filtering solvent exiting from said wash tank and said fluff trap filter are located inside said solvent tank, said second filter and said fluff trap filter being positioned at levels higher than the maximum level solvent reaches in said solvent tank.
Claim 5
Dependent Claim
56 words
An apparatus for cleaning and drying according to claim 1, wherein said second filter for filtering solvent exiting from said wash tank and said fluff trap filter are located inside said solvent tank, said second filter and said fluff trap filter being positioned at levels higher than the maximum level solvent reaches in said solvent tank.
References Cited (Backward Citations)
US1291266A
Cited
US1775699A
Cited
US2966922A
Cited
US3002287A
Cited
US3232081A
Cited
US3206950A
Cited
US3246493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |