US3905760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oven for baking food products
Assignee: TIPE REVENT AB
•
Filing: 1974-01-18
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Granted: 1975-09-16
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Expires: 1994-01-18
Abstract
Abstract Food products are baked in a forced-convection oven having a baking chamber into and out of which a rack carrying the food products on superposed trays may be rolled. Air is circulated horizontally through the baking chamber by a pair of vertically disposed cross-flow fans. The circulating air enters the baking chamber through alternate ones of two opposed side walls, and the major portion of it leaves the baking chamber through the other one of these side walls while a minor portion leaves the baking chamber through a back wall.
Inventors
- 👤 Leif A T Johansson
- 👤 Nils G Pers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:53
CPC Classifications
A; A21; A21B; A21B1/00; A21B1/02; A21B1/24; A21B1/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
An oven for baking food products, comprising: a. a thermally insulated enclosed housing having a vertical door; b. first and second opposed apertured vertical side walls extending from said door in horizontally spaced relation to the interior of said housing; c. a third apertured vertical side wall extending between said first and second side walls in horizontally spaced relation to the interior of said housing, said vertical side walls and said door jointly defining a baking chamber therebetween; d. a pair of fans of the cross-flow type, one disposed to direct its driven output to the space between said housing and said first vertical side wall, and the other disposed to direct its driven output to the space between said housing and said second vertical side wall, both disposed to have their low pressure side communicate with the space between said housing and said third vertical side wall; e. a control timer connected to operate said fans singly and jointly; and f. means in said housing outside said chamber for conditioning air.
Claim 2
Dependent Claim
172 words
An oven for baking food products, comprising: a. a thermally insulated enclosed housing having a vertical door; b. first and second opposed apertured vertical side walls extending from said door in horizontally spaced relation to the interior of said housing; c. a third apertured vertical side wall extending between said first and second side walls in horizontally spaced relation to the interior of said housing, said vertical side walls and said door jointly defining a baking chamber therebetween; d. a pair of fans of the cross-flow type, one disposed to direct its driven output to the space between said housing and said first vertical side wall, and the other disposed to direct its driven output to the space between said housing and said second vertical side wall, both disposed to have their low pressure side communicate with the space between said housing and said third vertical side wall; e. a control timer connected to operate said fans singly and jointly; and f. means in said housing outside said chamber for conditioning air.
Claim 3
Dependent Claim
39 words
An oven according to claim 1 in which said fans are respectively mounted for rotation about spaced vertical axes in said housing located exteriorly of said baking chamber and adjacent the side edges of said third vertical side wall.
Claim 4
Dependent Claim
21 words
An oven according to claim 1 in which said fans and said spaces are substantially vertically co-extensive with said baking chamber.
Claim 5
Dependent Claim
44 words
An oven according to claim 1 in which the apertures of said first and second side walls are distributed over substantially the entire area thereof, and the apertures of said third wall are disposed substantially co-extensively with the vertical extent of said baking chamber.
Claim 6
Dependent Claim
42 words
An oven according to claim 1 in which the effective flow area of the apertures in said third vertical wall does not exceed 30 percent of the effective flow area of the apertures in either of said first or second side walls.
Claim 7
Dependent Claim
87 words
An oven according to claim 1 including: a. means for adjusting the effective size of the apertures in said first and second vertical side walls; b. a lip at the lower edge of each of said last mentioned apertures, said lip being directed inwardly of said baking chamber and slightly upwardly; and c. means at the side of said first and second vertical side walls remote from said baking chamber for straightening air flow to be horizontal as it reaches said first and second vertical side walls.
References Cited (Backward Citations)
US3304071A
Cited
US3820525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |