US5329916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oven
Assignee: GEA Food Solutions Bakel BV
•
Filing: 1993-02-25
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Granted: 1994-07-19
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Expires: 2013-02-25
Abstract
Abstract An oven comprises a housing and at least one heater and a conveyor belt which runs through the housing and on which food products to be heated can be accommodated. The belt runs in two helical paths about spaced parallel vertical axes, the direction of movement of the belt along one helical path, as seen from above, being opposite the direction of movement of the belt about the other helical path. The housing comprises two chambers separated by a partition, one of the helical paths of the conveyor being disposed in one chamber and the other helical path being disposed in the other chamber. The partition has an opening through which the belt runs between the chambers. In this way, different temperature levels can be maintained in the two chambers.
Inventors
- 👤 Poul Lygum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:29
CPC Classifications
A; A21; A21B; A21B1/00; A21B1/42; A21B1/48; B; B65; B65G; B65G2207/00; B65G2207/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
An oven comprising a housing, heating means in the housing, and a conveyor belt which runs through the housing and on which food products to be heated can be accommodated, means constraining the belt to run in two helical paths about spaced parallel vertical axes, the direction of movement of the belt along one helical path, as seen from above, being opposite the direction of movement of the belt about the other helical path, the housing comprising two chambers separated by a partition, one said helical path being disposed in one said chamber and the other said helical path being disposed in the other said chamber, the partition having an opening through which the belt runs between said chambers.
Claim 2
Dependent Claim
119 words
An oven comprising a housing, heating means in the housing, and a conveyor belt which runs through the housing and on which food products to be heated can be accommodated, means constraining the belt to run in two helical paths about spaced parallel vertical axes, the direction of movement of the belt along one helical path, as seen from above, being opposite the direction of movement of the belt about the other helical path, the housing comprising two chambers separated by a partition, one said helical path being disposed in one said chamber and the other said helical path being disposed in the other said chamber, the partition having an opening through which the belt runs between said chambers.
Claim 3
Dependent Claim
31 words
An oven as claimed in claim 1, wherein each of said chambers has its own said heating means, whereby two different temperature zones can be formed one in each said chamber.
Claim 4
Dependent Claim
16 words
An oven as claimed in claim 1, said two paths having pitch angles of opposite sign.
Claim 5
Dependent Claim
18 words
An oven as claimed in claim 1, said two helical paths having pitch angles of the same sign.
Claim 6
Dependent Claim
29 words
An oven as claimed in claim 1, the number of windings of both said helical paths being the same, said helical windings having pitch angles that are the same.
Claim 7
Dependent Claim
25 words
An oven as claimed in claim 1, wherein the housing has an inlet opening and an outlet opening which are situated at the same level.
Claim 8
Dependent Claim
25 words
An oven as claimed in claim 1, wherein said constraining means comprises a pair of rotatable drums, and means for driving said drums in synchronism.
Claim 9
Dependent Claim
15 words
An oven as claimed in claim 1, said heating means comprising hot air heating means.
Claim 10
Dependent Claim
14 words
An oven as claimed in claim 1, said heating means comprising steam heating means.
References Cited (Backward Citations)
NL267447A
Cited
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Cited
FR2471143A1
Cited
GB2109765A
Cited
US4729470A
Cited
US4722321A
Cited
EP0215340A2
Cited
US4906485A
Cited
US4792303A
Cited
US5078120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-18 | 1998-01-17 | 1998-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-18 | 2002-01-17 | 2002-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-18 | 2006-01-17 | 2006-07-19 | $7700.00 | Window Closed / Lapsed |