GB815733A - Improvements in or relating to baking ovens - Google Patents
Improvements in or relating to baking ovensInfo
- Publication number
- GB815733A GB815733A GB890755A GB890755A GB815733A GB 815733 A GB815733 A GB 815733A GB 890755 A GB890755 A GB 890755A GB 890755 A GB890755 A GB 890755A GB 815733 A GB815733 A GB 815733A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oven
- chamber
- atmosphere
- ducts
- admission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000605 extraction Methods 0.000 abstract 6
- 239000007789 gas Substances 0.000 abstract 3
- 238000002485 combustion reaction Methods 0.000 abstract 2
- 235000008429 bread Nutrition 0.000 abstract 1
- 239000000567 combustion gas Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000000446 fuel Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000001105 regulatory Effects 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A21—BAKING; EDIBLE DOUGHS
- A21B—BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING
- A21B1/00—Bakers' ovens
- A21B1/42—Bakers' ovens characterised by the baking surfaces moving during the baking
- A21B1/48—Bakers' ovens characterised by the baking surfaces moving during the baking with surfaces in the form of an endless band
-
- A—HUMAN NECESSITIES
- A21—BAKING; EDIBLE DOUGHS
- A21B—BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING
- A21B1/00—Bakers' ovens
- A21B1/02—Bakers' ovens characterised by the heating arrangements
- A21B1/24—Ovens heated by media flowing therethrough
- A21B1/26—Ovens heated by media flowing therethrough by hot air
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Commercial Cooking Devices (AREA)
- Baking, Grill, Roasting (AREA)
- Frying-Pans Or Fryers (AREA)
Abstract
815,733. Bakers' ovens. COLLINS & CO. Ltd., T., and COLLINS, A. T. March 23, 1956 [March 26, 1955], No. 8907/55. Class 51 (2). A bakers oven incorporating a conveyer and means to circulate and heat the oven atmosphere without admixture with combustion products has atmosphere extraction and readmission means respectively located at regions of the oven chamber that are spaced apart both vertically and horizontally and extend throughout the width of the conveyer path within the chamber. In an oven in which bread is baked on a conveyer 12a, Fig. 1, whilst moving through a chamber 11, a fan in a casing 29, Fig. 2, draws the atmosphere from the chamber through ducts 25 and causes it to pass to the suction side of the fan through the annular space surrounding the central conduit 17 of a heat-exchanger 16 in the same direction as the combustion gases which issue from an oil or gas burner 19 into the conduit 17 for eventual discharge to a flue 20. The fan returns the reheated atmosphere to the chamber through ducts 27, Figs. 2, 3, and conduits 28. The chamber, to which steam may be admitted through a duct 14, may comprise lengthwise parts or the oven may consist of superposed chambers. In either case each part or chamber may be served by a separate heat-exchanger and circulation system. In a two-tier oven each chamber has such an exchanger and system 30a, 30b, Fig. 7, in each of which a burner end 31, Fig. 6, leads to a furnace retort 32 and thence to atmosphere via a conduit 33 transfixed by cross-tubes 34. A fan 43 induces oven atmosphere to flow from the chamber through extraction ducts 41a or 41b, Fig. 4, and trunking 40 to a jacket 38, surrounding the conduit 33, through which it is forced to flow in a zig-zag path by baffles therein. The reheated atmosphere is extracted from the jacket by the fan 43 and readmitted to the chamber through re-admission ducts 44a (or 44b). In a further heat-exchanger, the atmosphere is drawn from the oven chamber by a fan 60, Fig. 12, and reheated by passage around a combustion chamber 53 and through a sinuous passage defined by the walls of the exchanger 45 and internal baffles 55 during the course of which it is heated by gilled tubes 52 through which flows the hot gases emanating from the chamber 53. In another oven construction, the gaseous flow from a re-admission duct 28a, Fig. 8, to an extraction duct 25a, is in the same direction as the conveyer travel, whilst the flow direction from a duct 28b to a duct 25b is counter thereto. Fig. 9 shows two re-admission structures 28c, 28d, with extraction ducts 25a, 25b, therebetween, and also two similar but inverted re-admission structures 28c<SP>1</SP>, 28d<SP>1</SP> , located between the conveyer laps with extraction ducts 25a<SP>1</SP>, 25b<SP>1</SP>, between them. In an oven having top and bottom electrical or hot gas heating means 62, 63, Fig. 10, the atmosphere flows from either of two re-admission ducts 28e, 28f, to an extraction duct 25 in a direction counter to the conveyer travel. Baffles 64, 65 trap the atmosphere in the upper part of the oven and flaps 66, 67, at the entry end of the oven define a zone into which steam is injected through means 68. In yet another arrangement of re-admission ducts, the ducts 44a, Fig. 13, have perforated tubes 44c projecting therefrom lengthwise of the oven chamber. The re-admission ducts may have individuallyoperated dampers, e.g. 69, Fig. 2, and the oven temperature may be controlled by manually and/or thermostatically regulating the burner and/or the atmosphere circulating fan speed. The oven atmosphere may be electrically heated and a heat-exchanger having its input circuit connected to a fuel burning heater may have an electrical heater associated with its atmosphere (or output) circuit. Specification 732,897, [Group XXX], is referred to.
Publications (1)
Publication Number | Publication Date |
---|---|
GB815733A true GB815733A (en) | 1959-07-01 |
Family
ID=1629551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB890755A Expired GB815733A (en) | 1955-03-26 | Improvements in or relating to baking ovens |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB815733A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2020181A1 (en) * | 2007-07-30 | 2009-02-04 | Moretti Forni S.p.A. | Air splitter system for food conveyor ovens |
-
1955
- 1955-03-26 GB GB890755A patent/GB815733A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2020181A1 (en) * | 2007-07-30 | 2009-02-04 | Moretti Forni S.p.A. | Air splitter system for food conveyor ovens |
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