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Baking ovenBaking oven description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20050284466, Baking oven. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] The invention relates to a baking oven provided with an oven chamber which is arranged for receiving a large number of carriers in carrier positions, wherein a transport system is provided which is arranged for stepwise transporting carriers through the oven chamber from a preceding carrier position to a next carrier position, wherein the transport system comprises an ascending path and a descending path, wherein heating means are present for heating air, wherein blow openings are provided via which, in use, heated air is introduced into the oven chamber, as well as suction openings via which cooled air is extracted from the oven chamber. [0002] Such a baking oven is known from the European patent EP-B-0 710 441. In the known apparatus, hot air is blown into the oven chamber via vertical slots extending throughout the height of the oven. Fans draw in the cooled air via a central suction opening extending in vertical direction and pass it via heating means to the vertically extending blowing slots again. Accordingly, in the known oven, there is a rather overall air circulation in the oven chamber. Moreover, the flow direction of the hot air over carriers situated in the ascending path is the same in each case. One of the consequences is that the baking products disposed on the carriers are circumfused by the hot air from the same side in each case, which leads to a non-uniform heating of the baking products. In the descending path too, the hot air comes from the same direction in each case. Another drawback is that there is not any possibility of controlling the amount of hot air that is passed over the carriers other than through a control directly influencing the entire oven chamber. [0003] The invention contemplates a baking oven by means of which a better heating of baking products is realized, in the sense that the flow patterns of the hot air over the baking products are better manageable. [0004] To that end, the invention provides a baking oven of the type described in the preamble, wherein adjacent each carrier position at least one blow opening and at least one suction opening are arranged, the blow and suction openings being arranged movably at least in vertical direction relative to the carrier positions. [0005] As adjacent each carrier position at least one blow opening and at least one suction opening are arranged, the hot air flow at that respective carrier position is accurately defined by the positioning of the blow and suction opening relative to the carrier. This is an essential difference with respect to the oven from the European publication mentioned. For in that known oven, an overall air flow prevails in the oven chamber and it is not possible to influence the direction of the air flow and the position of the air flow relative to a carrier disposed in a carrier position. As, according to the invention, the blow and suction openings are arranged movably relative to the carrier positions, the position of the hot air flow relative to the carriers can be varied Thus, for instance, in the case of high baking products, the blow and suction openings can be moved slightly upwards in vertical direction relative to the carriers, so that the air flow impinges upon the baking products somewhat more from above than from the side. This makes it possible to influence the degree of browning of the baking products as well as the place where most browning occurs. Controllability of the position of the hot air flow can also be of great relevance to the cooking of the products. [0006] According to a further elaboration of the invention, for a particular carrier position the blow openings are arranged adjacent a first side of a carrier disposed in the respective carrier position, while the suction openings are arranged adjacent a second side of the respective carrier, located opposite the first side. [0007] As a result, a hot air flow extending across the carrier is created, which preferably covers the entire surface of the carrier. [0008] According to a further elaboration of the invention, it is particularly favorable when adjacent the first sides of successive carriers viewed in vertical direction, alternately suction and blow openings are arranged, such that in two carrier positions located directly above each other hot air has opposite flow directions. Such an embodiment has the advantage that the baking products when traversing the different carrier positions are circumfused by hot air alternately from the left and from the right. Such an alternate circumfusion with hot air results in a more uniform heating and cooking of the baking product. [0009] The invention further relates to a baking oven provided with an oven chamber which is arranged for receiving a large number of carriers in carrier positions, wherein a transport system is provided which is arranged for stepwise transporting carriers through the oven chamber from a preceding carrier position to a next carrier position, wherein the transport system comprises an ascending path and a descending path, wherein heating means are present for heating air, wherein blow openings are provided via which, in use, heated air is introduced into the oven chamber, as well as suction openings via which cooled air is extracted from the oven chamber, characterized in that carriers of different types are introducible into the oven. [0010] Further, the invention relates to a baking oven provided with a heat exchanger provided with primary and secondary channels, wherein the primary channels are connected to at least one burner, wherein an outlet of the primary channels is connectible to a flue, wherein an inlet of the secondary channels is in fluid communication, via a pipe system, with the suction openings, wherein an outlet of the secondary channels is in fluid communication, via a pipe system, with the blow openings. At one of these ovens, further, there may be means for placing baking products onto the carriers adjacent an oven chamber inlet and means for taking off baking products from the carriers adjacent an oven chamber outlet, wherein the transport system is provided with return transport means to transport the carrier from the lowermost carrier position of the descending path to the lowermost position of the ascending path. [0011] According to a further elaboration of the invention, these return transport means can extend in the oven chamber. It is also possible, however, that the return transport means extend outside the oven chamber. [0012] With each of the baking ovens described, carriers of different types can be introduced into the oven. [0013] In this connection, a first type of carriers may be manufactured from substantially metal, and a second type of carriers may be manufactured from substantially ceramic material. [0014] Optionally, a carrier transport system with a buffer capacity, extending outside the oven, may be provided for removing and/or temporarily storing the carriers of a particular type. [0015] It may be noted that U.S. Pat. No. 6,450,086 shows a baking oven which, however, does not involve any loose carriers in the form of metal plates or ceramic plates that can be introduced into and removed from the oven. With the known oven, the carriers are fixedly connected with a chain which always travels the same path through a number of processing stations. The known oven does not involve any flexibility resulting from the fact that loose carriers are being employed. Indeed, it is an apparatus for a different type of bakery, viz. an industrial bakery where only a few types of product are manufactured in very large numbers. The oven according to the invention is intended for bakeries that must be able to produce many different products in considerable numbers. Accordingly, the known apparatus does not involve any external transport system for the supply and removal of carriers. The vertical position of the blow and suction openings is fixed in the known apparatus, only the blow-out direction can be varied in the known apparatus. The advantages that can be achieved with the blow and suction openings movable at least in vertical direction cannot be realized with the known apparatus. [0016] WO94/16567 shows a baking oven into which a carriage with baking plates can be wheeled. This known oven does not involve any transport system with an ascending and a descending path, let alone a transport system in which carriers can be placed and from which carriers can be removed. For this known apparatus, too, it holds that while the blow-out direction of the blow openings can be varied, the positions of the blow and suction openings are not adjustable in vertical direction. The known apparatus moreover does not feature a heat exchanger by means of which clean air is heated by means of flue gases of a burner. None of the publications mentioned discloses a baking oven which is suitable for receiving therein carriers of different types, such as, for instance, metal carriers and ceramic carriers. [0017] The invention further provides a baking system provided with a baking oven according to the invention, an external transport system for carriers, with carriers of at least two types being included in the transport system. [0018] According to a further elaboration of the baking system, in the external transport system thereof, buffers are included for at least temporarily storing carriers. [0019] Further elaborations of the invention are described in the subclaims and will hereinafter be further clarified with reference to the drawings [0020] FIG. 1 shows a front view of an exemplary embodiment of the baking oven; [0021] FIG. 2 shows a right-hand side view; [0022] FIG. 3 shows a rear view; [0023] FIG. 4 shows a front view of the baking oven, with the front plating removed; [0024] FIG. 5 shows a top plan view of the baking oven, with the top plating removed; Continue reading about Baking oven... Full patent description for Baking oven Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Baking oven patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Baking oven or other areas of interest. ### Previous Patent Application: Oven lock with mechanical actuation of remotely located door switch Next Patent Application: Solar tracking apparatus Industry Class: Stoves and furnaces ### FreshPatents.com Support Thank you for viewing the Baking oven patent info. IP-related news and info Results in 0.13108 seconds Other interesting Feshpatents.com categories: Qualcomm , Schering-Plough , Schlumberger , Seagate , Siemens , Texas Instruments , 174 |
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