US3581679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oven apparatus
Assignee: Fr Winkler GmbH and Co KG Spezialfabrik Fuer Baeckereimaschinen und Backoefen
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Filing: 1968-12-02
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Granted: 1971-06-01
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Expires: 1988-12-02
Abstract
Abstract In an oven apparatus for baking food products including an oven chamber or cavity defined in part by a pair of spaced parallel liners or walls defining the floor and top of the oven chamber, a pair of heating systems providing both radiative and conductive heating of the air in the heating channels. The first heating system includes a plurality of longitudinally extending heating channels adjacent to and disposed exteriorly of the liners forming the top and floor of the oven chamber and means for circulating hot gases through the heating channels. The second heating system includes a plurality of air channels between adjacent ones of the heating channels and coplanar therewith, means defining a plurality of orifices whereby air is circulated through the heating channels and through the oven chamber or cavity. Preferably, the channels are formed by corrugated or meandering members made of a heat conductive material so that the cross section of the heating channels is trapezoidal with its larger base confronting the oven cavity, the slanting sides of the corrugated member providing a common wall dividing the heating channels and the air channels. This arrangement provides an oven which, while compact, nevertheless provides both radiative and conductive heat of the air in the oven cavity as well as convection flow through it.
Inventors
- 👤 Peter Jansen
- 👤 Wolfhard Erling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:27
CPC Classifications
A; A21; A21B; A21B1/00; A21B1/02; A21B1/24; A21B1/245; A21B1/42; A21B1/48
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
Oven apparatus comprising means defining an oven cavity including a pair of spaced apart walls, a plurality of side-byside coplanar channels disposed exteriorly of said oven cavity adjacent at least one of said oven walls in heat exchange relation therewith, alternate ones of said channels being heating channels and the channels between the alternate ones air channels, means defining a plurality of orifices providing communication between the air channels and the oven cavity, means for circulating air through said air channels and through said oven cavity to provide for convection heating of said oven cavity and means for circulating a heated gas through said heating channels to provide for radiant heating of said oven cavity.
Claim 2
Dependent Claim
115 words
Oven apparatus comprising means defining an oven cavity including a pair of spaced apart walls, a plurality of side-byside coplanar channels disposed exteriorly of said oven cavity adjacent at least one of said oven walls in heat exchange relation therewith, alternate ones of said channels being heating channels and the channels between the alternate ones air channels, means defining a plurality of orifices providing communication between the air channels and the oven cavity, means for circulating air through said air channels and through said oven cavity to provide for convection heating of said oven cavity and means for circulating a heated gas through said heating channels to provide for radiant heating of said oven cavity.
Claim 3
Dependent Claim
57 words
Oven apparatus as claimed in claim 1 including heating means mounted exteriorly of said oven cavity on at least one of said oven walls and wherein said air recirculation means comprises an air recirculation system for withdrawing air from said oven cavity and passing it again over said heating means and thence back to said oven cavity.
Claim 4
Dependent Claim
38 words
Oven apparatus as claimed in claim 1 wherein said recirculation means includes air withdrawing means comprising air exit porting at the top of said oven cavity and forced air circulation means for withdrawing oven air through said porting.
Claim 5
Dependent Claim
34 words
Oven apparatus as claimed in claim 1 wherein the air channels are of generally triangular cross section and the heating channels are of trapezoidal cross section with the larger base confronting the oven cavity.
Claim 6
Dependent Claim
17 words
Oven apparatus as claimed in claim 4 wherein the channels are formed by a corrugated web member.
Claim 7
Dependent Claim
21 words
Oven apparatus as claimed in claim 1 including an arrangement of heating and air channels above and below the oven chamber.
Claim 8
Dependent Claim
17 words
Oven apparatus as claimed in claim 1 wherein said orifices are arranged in parallel longitudinally extending rows.
Claim 9
Dependent Claim
151 words
Oven apparatus comprising means defining an oven chamber having adjacent zones and including a pair of spaced apart walls, a heating system in each zone consisting of a plurality of side-by-side coplanar channels disposed exteriorly of said oven cavity adjacent at least one of said oven walls in heat exchange relation therewith, alternate ones of said channels being heating channels and the channels between the alternate ones air channels, means defining a plurality of orifices providing communication between the air channels and the oven chamber, and means for circulating air through said air channels and through said oven cavity to provide for convection heating of said oven cavity and means for circulating a heated gas through said heating channels to provide for radiant heating of said oven cavity, said orifices being arranged in longitudinally extending parallel side by side rows, the rows in each zone being staggered relative to one another.
Claim 10
Dependent Claim
151 words
Oven apparatus comprising means defining an oven chamber having adjacent zones and including a pair of spaced apart walls, a heating system in each zone consisting of a plurality of side-by-side coplanar channels disposed exteriorly of said oven cavity adjacent at least one of said oven walls in heat exchange relation therewith, alternate ones of said channels being heating channels and the channels between the alternate ones air channels, means defining a plurality of orifices providing communication between the air channels and the oven chamber, and means for circulating air through said air channels and through said oven cavity to provide for convection heating of said oven cavity and means for circulating a heated gas through said heating channels to provide for radiant heating of said oven cavity, said orifices being arranged in longitudinally extending parallel side by side rows, the rows in each zone being staggered relative to one another.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |