US3886762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatuses for freezing articles of food and similar products
Assignee: John Bean Technologies AB
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Filing: 1973-08-28
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Granted: 1975-06-03
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Expires: 1993-08-28
Abstract
Abstract Apparatus for freezing articles of food and similar products, comprising between side walls a perforated conveyor feeding the product through a freezing chamber, and at least one device, delimited to a small part of the length of said conveyor, for directing a gaseous refrigerant up through the conveyor in order to set the product in motion during freezing. Said device comprises a perforated bottom mounted immediately underneath said conveyor and permitting a controlled fluidized bed to be maintained above it, the space allowed for said fluidized bed being defined by the side walls and the product on the conveyor before and after the location of the perforated bottom.
Inventors
- 👤 Sven-Olle H Rothstein
- 👤 Sture Astrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:01
CPC Classifications
F; F25; F25D; F25D13/00; F25D13/06; F25D13/067; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
Apparatus for freezing articles of food and similar products, Comprising between side walls a perforated conveyor feeding the product through a freezing chamber, and at least one device, delimited to a small part of the length of said conveyor, for directing a gaseous refrigerant up through the conveyor in order to set the product in motion during freezing, wherein said device comprises a perforated bottom mounted immediately underneath said conveyor and permitting a controlled fluidized bed to be maintained above it, the space allowed for said fluidized bed being defined by the side walls and the product on the conveyor before and after the location of the perforated bottom.
Claim 2
Dependent Claim
109 words
Apparatus for freezing articles of food and similar products, Comprising between side walls a perforated conveyor feeding the product through a freezing chamber, and at least one device, delimited to a small part of the length of said conveyor, for directing a gaseous refrigerant up through the conveyor in order to set the product in motion during freezing, wherein said device comprises a perforated bottom mounted immediately underneath said conveyor and permitting a controlled fluidized bed to be maintained above it, the space allowed for said fluidized bed being defined by the side walls and the product on the conveyor before and after the location of the perforated bottom.
Claim 3
Dependent Claim
109 words
Apparatus for freezing articles of food and similar products, Comprising between side walls a perforated conveyor feeding the product through a freezing chamber, and at least one device, delimited to a small part of the length of said conveyor, for directing a gaseous refrigerant up through the conveyor in order to set the product in motion during freezing, wherein said device comprises a perforated bottom mounted immediately underneath said conveyor and permitting a controlled fluidized bed to be maintained above it, the space allowed for said fluidized bed being defined by the side walls and the product on the conveyor before and after the location of the perforated bottom.
Claim 4
Dependent Claim
109 words
Apparatus for freezing articles of food and similar products, Comprising between side walls a perforated conveyor feeding the product through a freezing chamber, and at least one device, delimited to a small part of the length of said conveyor, for directing a gaseous refrigerant up through the conveyor in order to set the product in motion during freezing, wherein said device comprises a perforated bottom mounted immediately underneath said conveyor and permitting a controlled fluidized bed to be maintained above it, the space allowed for said fluidized bed being defined by the side walls and the product on the conveyor before and after the location of the perforated bottom.
Claim 5
Dependent Claim
41 words
apparatus as claimed in claim 1, wherein the device for directing a gaseous refrigerant up through the conveyor comprises a specific pressure chamber provided with fan and cooling means and including the perforated bottom in a section located below the conveyor.
Claim 6
Dependent Claim
18 words
Apparatus as claimed in claim 1, wherein the perforations of the perforated bottom are irregularly distributed over it.
Claim 7
Dependent Claim
27 words
Apparatus as claimed in claim 1, comprising above the conveyor feeding the product through the freezing chamber, a second, preferably perforated conveyor extending through the freezing chamber.
References Cited (Backward Citations)
US3169381A
Cited
US3492740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |