US4173830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dryer for mesh baskets
Assignee: DOUGLAS HANSON CONSULTANTS Inc ANOKA MN A CORP OF MN
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Filing: 1977-12-12
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Granted: 1979-11-13
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Expires: 1997-12-12
Abstract
Abstract A dryer for automated washing and drying of mesh or perforated bottom trays such as those used for bakery goods, which includes a source of air under relatively low pressure and has a means to direct air at a relatively high velocity through the mesh or open bottom tray as it is carried on a perforated or open conveyor, and vacuum means connected to the suction side of the same fan to collect and receive moisture laden air and water droplets that pass through the tray and the conveyor. The fan includes a water-air separator on the inlet side so that the inlet air carrying the water is processed to remove water droplets and the like.
Inventors
- 👤 Douglas R. Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:27
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/30; F26B21/33; F26B21/50; F26B21/55
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A drying apparatus for drying perforated bottom articles carried by an open work conveyor comprising a fan assembly, said fan assembly having an outlet providing a desired substantial volume of air at a substantial velocity forming an airstream, means directing said airstream toward said perforated article on said conveyor, and means to thereby force said airstream through said article and said conveyor, and vacuum means comprising the low pressure side of said fan assembly and including vacuum port means aligned with said means to direct said airstream toward said article, said vacuum port means thereby collecting air forced through said article and said conveyor.
Claim 2
Dependent Claim
104 words
A drying apparatus for drying perforated bottom articles carried by an open work conveyor comprising a fan assembly, said fan assembly having an outlet providing a desired substantial volume of air at a substantial velocity forming an airstream, means directing said airstream toward said perforated article on said conveyor, and means to thereby force said airstream through said article and said conveyor, and vacuum means comprising the low pressure side of said fan assembly and including vacuum port means aligned with said means to direct said airstream toward said article, said vacuum port means thereby collecting air forced through said article and said conveyor.
Claim 3
Dependent Claim
37 words
The combination as specified in claim 1 wherein said conveyor includes a generally horizontal section, and said means for directing the air stream facing generally vertically downwardly, and said vacuum port means being positioned below said article.
Claim 4
Dependent Claim
26 words
The combination as specified in claim 1 wherein said means for directing the air stream comprises nozzle means substantially spanning the article carried by said conveyor.
Claim 5
Dependent Claim
21 words
The combination as specified in claim 1 and separator means to subject air carried by said vacuum nozzle to air-water separation.
Claim 6
Independent Claim
156 words
An apparatus for drying perforated bottom trays carried along an open work conveyor member and supported on said open work conveyor member in a generally horizontal plane comprising first means to provide air under pressure, duct means including outlet nozzles positioned above a tray carried by said conveyor and positioned to overlie said tray as the tray is moved along said conveyor, said nozzle means directing a flow of a high velocity air stream against said tray to force water on the tray to be carried through the tray and blown off said tray, second means to provide a vacuum nozzle positioned below said tray and conveyor member as the tray is carried by said conveyor member, said vacuum nozzle means being arranged to collect substantially all of the air passing from said first mentioned nozzle through said tray, and means to return said air from said vacuum nozzle to be recirculated through said first means.
Claim 7
Independent Claim
156 words
An apparatus for drying perforated bottom trays carried along an open work conveyor member and supported on said open work conveyor member in a generally horizontal plane comprising first means to provide air under pressure, duct means including outlet nozzles positioned above a tray carried by said conveyor and positioned to overlie said tray as the tray is moved along said conveyor, said nozzle means directing a flow of a high velocity air stream against said tray to force water on the tray to be carried through the tray and blown off said tray, second means to provide a vacuum nozzle positioned below said tray and conveyor member as the tray is carried by said conveyor member, said vacuum nozzle means being arranged to collect substantially all of the air passing from said first mentioned nozzle through said tray, and means to return said air from said vacuum nozzle to be recirculated through said first means.
Claim 8
Independent Claim
148 words
A method of removing water from and drying perforated bottom articles carried on a conveyor using a recirculating fan member having a pressure side and a vacuum side, said fan generating a desired volume of air, comprising the steps of directing air from said pressure side of the fan in a high velocity stream directly through the perforated bottom of the article as it is moved on said conveyor to force the airstream to pass through the perforated bottom of said article and to carry water on the article through said article, collecting the water laden air that has passed through said article and returning said water laden air to the vacuum side of said fan, and separating at least portions of the water carried by the air to the vacuum side of the fan out of the airstream prior to recirculation of the air by said fan.
Claim 9
Independent Claim
148 words
A method of removing water from and drying perforated bottom articles carried on a conveyor using a recirculating fan member having a pressure side and a vacuum side, said fan generating a desired volume of air, comprising the steps of directing air from said pressure side of the fan in a high velocity stream directly through the perforated bottom of the article as it is moved on said conveyor to force the airstream to pass through the perforated bottom of said article and to carry water on the article through said article, collecting the water laden air that has passed through said article and returning said water laden air to the vacuum side of said fan, and separating at least portions of the water carried by the air to the vacuum side of the fan out of the airstream prior to recirculation of the air by said fan.
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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |