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US3843315A Expired / Lapsed US ⏱️ 0.0 years remaining

Continuous pastry oven

Assignee: Individual
•
Filing: 1973-02-20
•
Granted: 1974-10-22
•
Expires: 1993-02-20
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Abstract

Abstract An improvement is disclosed for a continuous pastry oven of the type wherein pastry products pass through an oven chamber on a transport belt. This type of oven has an elongated baking chamber surrounded by heat insulating walls, and a main portion of baking heat is supplied conductively to the bottom of pastry by the transport belt. The improvement described herein relates to a new and unique interrelationship between a heating plate, heating means and transport belt, which elements form the conductive heating system. Additionally, the heating plate and transport belt have certain necessary characteristics which provide an oven having maximized performance. The heating plate is located at the bottom of the baking chamber and extends longitudinally for substantially the entire length of the baking chamber. It is a good heat conductor and also provides the required heat capacity to insure uniform baking of the products since it has a thickness of about one-half to threefourth inches. Heating means are provided in direct contact with the heating plate and supply heat thereto which is sufficient to maintain the top surface of the plate at an elevated temperature in the range of 200-275*F.-a much lower temperature range than heretofore required. An endless transport belt formed from adhesive material such as TEFLON poly(tetrafluoroethylene) slidably and continuously engages the top of the heating plate as it transports pastry through the baking chamber.

Inventors

  • 👤 E Sorensen
  • 👤 F Beach

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 14:22
CPC Classifications
A; A21; A21B; A21B1/00; A21B1/42; A21B1/48; A47; A47J; A47J37/00; A47J37/04; A47J37/044

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 152 words
In a continuous oven having an elongated baking chamber surrounded by heat-insulating walls and wherein a main portion of baking heat is supplied conductively to the bottom of pastry by a pastry transport belt, the improvement wherein a conductive heating system is used comprising: a. a heating plate located at the bottom of said baking chamber and extending longitudinally for substantially the entire length of said baking chamber, said heating plate being a good heat conductor and being from about one-half inch to about three-fourth inch thick; b. heating means in contact with said heating plate to supply heat to said plate sufficient to maintaIn the surface thereof at an elevated temperature between about 200*F. and about 275*F.; and, c. an endless transport belt formed from an abhesive material, the underside of said belt slidably and continuously engaging the top of said heating plate as it transports pastry through said baking chamber.
Claim 2
Dependent Claim 152 words
In a continuous oven having an elongated baking chamber surrounded by heat-insulating walls and wherein a main portion of baking heat is supplied conductively to the bottom of pastry by a pastry transport belt, the improvement wherein a conductive heating system is used comprising: a. a heating plate located at the bottom of said baking chamber and extending longitudinally for substantially the entire length of said baking chamber, said heating plate being a good heat conductor and being from about one-half inch to about three-fourth inch thick; b. heating means in contact with said heating plate to supply heat to said plate sufficient to maintaIn the surface thereof at an elevated temperature between about 200*F. and about 275*F.; and, c. an endless transport belt formed from an abhesive material, the underside of said belt slidably and continuously engaging the top of said heating plate as it transports pastry through said baking chamber.
Claim 3
Dependent Claim 37 words
An improvement of claim 1 wherein said heating means in contact with said heating plate comprise electrical resistance heaters positioned at the bottom of said plate and surrounded by heat insulation except where they contact the plate.
Claim 4
Dependent Claim 12 words
An improvement of claim 2 wherein said belt is formed from poly(tetrafluoroethylene).
Claim 5
Dependent Claim 20 words
An improvement of claim 3 wherein said belt has a thickness of from about 0.002 inches to about 0.004 inches.
Claim 6
Dependent Claim 18 words
An improvement of claim 4 wherein said pastry oven includes an additional heating source located above said belt.
Claim 7
Dependent Claim 15 words
An improvement of claim 5 wherein said additional heating means comprises a microwave heating element.
Claim 8
Dependent Claim 15 words
An improvement of claim 5 wherein said additional heating means comprises an infrared heating element.
Claim 9
Dependent Claim 16 words
An improvement of claim 1 wherein said baking chamber has one wall comprising heat insulating glass.
Claim 10
Dependent Claim 16 words
An improvement of claim 5 wherein said baking chamber has one wall comprising heat insulating glass.
Claim 11
Dependent Claim 23 words
An improvement of claim 9 additionally including a cleaning means positioned to contact said transport belt after the exit from the baking chamber.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-10-21 1978-04-22 1978-10-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-10-21 1982-04-22 1982-10-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-10-21 1986-04-22 1986-10-22 $7700.00 Window Closed / Lapsed

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