US3641945A - Discontinuous oven - Google Patents

Discontinuous oven Download PDF

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Publication number
US3641945A
US3641945A US841804A US3641945DA US3641945A US 3641945 A US3641945 A US 3641945A US 841804 A US841804 A US 841804A US 3641945D A US3641945D A US 3641945DA US 3641945 A US3641945 A US 3641945A
Authority
US
United States
Prior art keywords
oven
shaft
oven chamber
rack
driver member
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 - Lifetime
Application number
US841804A
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English (en)
Inventor
Magnus E Tillander
Ake B Persson
Leif A T Johansson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TI PE ELMEKO TILLANDER AND PERSS
Original Assignee
TI PE ELMEKO TILLANDER AND PERSS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TI PE ELMEKO TILLANDER AND PERSS filed Critical TI PE ELMEKO TILLANDER AND PERSS
Application granted granted Critical
Publication of US3641945A publication Critical patent/US3641945A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A21B1/44—Bakers' ovens characterised by the baking surfaces moving during the baking with surfaces rotating in a horizontal plane
    • A—HUMAN NECESSITIES
    • A21—BAKING; EDIBLE DOUGHS
    • A21B—BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING
    • A21B1/00—Bakers' ovens
    • A21B1/50—Bakers' ovens characterised by having removable baking surfaces

Definitions

  • A215 1/42 member at the rop of the Oven chamber the driver member is [58] Field 0f Search ..107/55, 56, 60; shifrabie between a lower position for gripping the rack with 34/184-18814122g221-7" 265/142? 1423i l? the latter supported by the floor of the oven chamber and an l 5 2 /33 o 3 3 5 upper position for holding the rack raised from the floor.
  • the shifting of the rack is effected by means of an axial cam or a [56] References cned toggle linkage and is controlled by the opening and closing UNITED STATES PATENTS movements of the door of the oven chamber. 2,530,595 l l/ 1950 Blaha ..25/ 142 D 2 Claims, 8 Drawing Figures e L! g4 L! PAIENTEUFEB 15
  • This invention generally relates to what is often referred to as rack ovens, that is discontinuous ovens having an oven chamber for receiving a rack loaded with goods to be treated. More particularly, the invention is concerned with an oven of this class having at the top of the oven chamber a driver member adapted to impart a rotary or reciprocatory motion to the rack. The invention is particularly useful in connection with convection ovens (that is ovens in which the goods to be treated are heated directly by flowing hot air) for heat treatment of food, such as baking or thawing.
  • convection ovens that is ovens in which the goods to be treated are heated directly by flowing hot air
  • the rack is rotated or reciprocated during the treatment in order that a uniform treatment of the goods may be ensured even if the heat distribution in the oven chamber is uneven.
  • the driver member may consist of a frame or the like having a pair of spaced parallel rollerways between which the rack, which is usually provided with wheels, can be pushed in with parallel, horizontal flanges on the rack sliding on the rollerways.
  • the flanges may be bent slightly upward at their ends.
  • the driver member and the parts cooperating therewith may be embodied in other ways, but inconveniences connected with all the embodiments known to us are that the introduction of the rack into the oven chamber and the raising of the rack from the floor of the oven chamber require some effort and, moreover, may subject the rack to impacts which may cause the goods on the rack to be displaced or to fall off. f course, the heavier the rack and the goods thereon are, the more severe these inconveniences are.
  • the general object of the invention is to alleviate the aboveexplained inconveniences, and a more specific object is to provide an oven in which the rack is not lifted until it has been completely pushed into the baking chamber.
  • the driver member is shiftable between a lower position for gripping the rack with the rack supported by the floor of the oven chamber and an upper position for holding the rack lifted from the floor of the oven chamber.
  • the shifting of the driver member may be elected by a device operating in response to the opening and closing of the door of the oven chamber so that the driver member is automatically shifted to its lower position when the door is opened and shifted to its upper position when the door is closed.
  • FIG. I is a view in vertical section of a convection rack oven and illustrates a first embodiment of the invention
  • FIG. 2 is a top plan view ofthe oven in FIG. 1;
  • FIG. 3 shows, on a larger scale, a portion of FIG. l'
  • FIG. 4 is a perspective view of a detail in FIG. 3;
  • FIGS. 5 and 6 are similar views in vertical section of a second embodiment of the invention with the driver member in its lower and upper positions, respectively;
  • FIGS. 7 and 8 are sectional views corresponding to FIGS. 5 and V6 and illustrate a third embodiment.
  • the convection oven shown in FIGS. 1 and 2 is of the type having a rotary rack'll) for goods to be treated, such as bread, for instance.
  • the goods, not shown, are placed on superposed pans or other suitable supports in the wheeled rack and heated by flowing hot air which-is driven substantially horizontally through the oven chamber 12 by a fan 11 and heated by a heater 13.
  • a rotatably mounted driver member 14 in the form of a yoke having two parallel horizontal flanges 15 directed inwardly and adapted to underlie two flanges 16 on the rack 10 to keep the latter lifted from the floor of the oven chamber, as shown in FIG. l.
  • the driver member 14 is supported by the lower end of a rotatable shaft I7 driven by a motor 18 and a V-belt to rotate the driver member and the rack held thereby.
  • the driver member 14 is shiftable vertically between the upper position shown in full lines in FIG.
  • the shifting between the two positions is effected by a shift mechanism 19 operated by a door 20 of the oven chamber in such a way that the driver member is shifted to its lower position when the door is opened and to its upper position when the door is closed.
  • the rack l0 can be freely pushed into or pulled out of the oven chamber 12 in horizontal direction, and when the door is closed, the rack is automatically lifted from the floor of the oven chamber so that it can rotate without sliding or rolling on the floor.
  • the driving motor 18 is connected to a switch actuated by the door in such a way that the motor is stopped as soon as the door is moved in the opening direction and started as soon as the door has been fully closed.
  • the shift mechanism 19 comprises a collar 21 which surrounds the shaft 17 and is rotatable independently of the shaft.
  • the upper end of the collar 21 supports the shaft 17 and the associated parts, i.e., primarily the driver member 14 and the rack, and the lower end is supported by a stationary axial cam surrounding the shaft.
  • the collar 21 When the collar 21 is rotated, it is moved upwards or downwards in accordance with the shape of the axial cam 22 and the shaft 17 and, accordingly, the driver member 14 follows its movements.
  • the shaft 17 is supported by the upper end of the collar 2l via a pulley 23, by means of which the shaft is driven from the motor 18, and an intermediate thrust bearing 24.
  • the collar in turn, is supported by the axial cam 22, which is positioned on the top wall 25 of the oven and the shape of which is best shown in FIG. 4, by means of rollers 26 disposed on either side of the collar and having horizontal stub axles.
  • the collar is provided with a radial arm 27 which is, via a linkage 28, connected to the door 20 of the oven chamber.
  • the rollers 26 of the collar 21 engage two diametrically opposed high cam segments 29 of the axial cam 22, as shown in FIGS. 1 and 3, and the shaft 17 and the driver member 14 are held in their upper position.
  • the arm 27 and the collar 21 are rotated approximately 90 so that the rollers 26 of the collar 21 roll down onto two low cam segments 30.
  • the shaft 17 and the driver member then slide down by their own weight to the lower position shown by dash-dot lines in FIG. 1.
  • the shift mechanism 19A shown in FIGS. 5 and 6 differs from the shift mechanism 19 in FIGS. 1 to 4 in that the collar 21A is shifted by means of a toggle linkage 31 instead of by an axial cam.
  • One end of one link 32 of the toggle linkage 31 is pivoted on a horizontal pin 33 on the collar 21A and one end of the other link 34 is pivoted on a horizontal pin 35 on a stationary second collar 36 which is supported by the top wall 2S via a thrust bearing 37.
  • a push rod 28A which may form part of a linkage similar to the linkage 28 in FIG. 2, is connected to a common pivot pin 33 pivotally connecting the ends of the toggle links 32 and 34 remote from the pins 33 and 35 to each other.
  • the shift mechanism 19B shown in FIGS. 7 and 8 resembles the shift mechanism 19A but instead of a complete toggle linkage it has a support arm 39, one end of which is pivoted on a horizontal pin 40 on the collar 21B and the other end of which is supported by the top wall 2S via a roller 41.
  • a push rod 28B similar to the push rod 28A in FIGS. 5 and 6 is pivoted to the support arm 39 and adapted to move the support arm from the position shown in FIG. 7, in which the support arm is at an angle to the axis of the collar 21B and the shaft 17 and the lower end of the collar is supported directly by the top wall of the oven, to the position shown in FIG. 7, in which the support arm is substantially parallel to the collar and the shaft and keeps them lifted.
  • the invention is not limited to the embodiments shown and described as examples which all relate to a convection oven having a rotary rack for the goods to be treated.
  • the driver member may be secured to a tube surrounding the shaft 17 and connected to the shift mechanism.
  • the shaft is connected to the driver member by means of splines or the like and axially fixed. Another possibility is to make the shaft 17 movable axially with respect to the pulley so that the latter can always be kept at the same level.
  • the shift mechanism may be actuated by means of the driving motor 18 or a separate motor. Although not absolutely necessary, it is convenient to cause the closing and opening movements of the oven door to control the shift mechanism. lt should also be noted that the invention is applicable also to ovens in which the rack is reciprocated during the treatment instead of being rotated, as shown and described in U.S. Pat. No. 3,402,683 issued Sept. 24, 1968.
  • a discontinuous oven comprising walls forming an oven chamber having a floor therein and a door for opening the oven chamber and placing racks loaded with goods in said oven and the racks being supported on the iloor when they are placed in said oven, a driver member positioned in the top of said oven chamber, means for displacing said driver member between a lower position in which it engages the rack while it is supported on the floor and an upper position in which it lifts the rack above the floor of said oven chamber, means for imparting motion to said driver member and the rack when said driver member is in its upper position, said means for displacing said driver member comprises a vertically arranged axially movable shaft extending through the top of said oven chamber, said driver member positioned on the lower end of said shaft, a collar secured to the upper end of said shaft exteriorly of said chamber, a shift mechanism arranged to lift and lower said collar and thereby axially move said shaft, said shift mechanism comprises an axially extending stationary an' nular member disposed about said shaft and having an annular cam
  • s aid shift mechanism comprises a suspension member positioned about said shaft between said collar secured to the upper end of said shaft and said annular member, said suspension member being journaled for rotation on the annular cam surface of said annular member for axially displacing said shaft and moving said driven member between its upper and lower position.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Drying Of Solid Materials (AREA)
  • Electric Ovens (AREA)
US841804A 1968-07-31 1969-07-15 Discontinuous oven Expired - Lifetime US3641945A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE10376/68A SE322740B (fr) 1968-07-31 1968-07-31

Publications (1)

Publication Number Publication Date
US3641945A true US3641945A (en) 1972-02-15

Family

ID=20292212

Family Applications (1)

Application Number Title Priority Date Filing Date
US841804A Expired - Lifetime US3641945A (en) 1968-07-31 1969-07-15 Discontinuous oven

Country Status (4)

Country Link
US (1) US3641945A (fr)
DE (1) DE1937472C3 (fr)
GB (1) GB1231302A (fr)
SE (1) SE322740B (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030476A (en) * 1976-03-05 1977-06-21 Bevles Co., Inc. Heated cabinet for food
JPS54163200U (fr) * 1978-05-08 1979-11-15
JPS54147991A (en) * 1978-05-08 1979-11-19 Naigai Shisetsu Kougiyou Kk Rotary baking apparatus
JPS57115894U (fr) * 1981-12-24 1982-07-17
US6263693B1 (en) * 1996-09-23 2001-07-24 Andrew J. Gladd, Sr. Alternating horizontal air flow chiller
US20060210382A1 (en) * 2004-10-14 2006-09-21 Distrobot Systems, Inc. Inventory system with mobile drive unit and inventory holder
US20090311399A1 (en) * 2006-09-18 2009-12-17 Michael Koos Baking oven having a suspended baked goods carrier
WO2012152876A3 (fr) * 2011-05-10 2013-01-03 Revent International Ab Dispositif permettant d'ajuster la hauteur d'un chariot-étagère dans un four à chariots-étagères
WO2014042586A1 (fr) * 2012-09-14 2014-03-20 Revent International Ab Porte de four et système de chariot
US20150245622A1 (en) * 2012-09-12 2015-09-03 Revent International Ab Hot air rack oven
WO2016126738A1 (fr) * 2015-02-03 2016-08-11 Lbc Bakery Equipment, Inc. Four à convection pourvu d'un échangeur de chaleur à contre-courant linéaire
US11395497B2 (en) 2010-03-04 2022-07-26 Revent International Ab Device for baking dough-based food products, net and method for baking such products

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE369828B (fr) * 1973-01-26 1974-09-23 Tipe Revent Ab
SE7406009L (sv) * 1974-05-06 1975-11-07 Tipe Revent Ab Anordning vid stickugnar.
DE2435138A1 (de) * 1974-07-22 1976-02-12 Franz Schalk Backofen
FR2536734A1 (fr) * 1982-11-26 1984-06-01 Pavailler Dispositif de suspension, d'elevation et d'entrainement en rotation d'un chariot a l'interieur d'une enceinte
DE9205364U1 (de) * 1992-04-18 1992-06-25 Hans Schröder GmbH & Co KG, 4600 Dortmund Vorrichtung zur Befestigung von Fensterbänken und anderen Ablagen an Kastenheizkörpern, Flachheizkörpern o.dgl.
EP3250862A1 (fr) * 2015-01-28 2017-12-06 Sell Gmbh Dispositif de refroidissement et procédé de refroidissement d'un contenant de produits réfrigérés
CN104719357B (zh) * 2015-04-02 2017-05-24 吕伟贤 大容量电烤炉

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1365686A (en) * 1918-10-22 1921-01-18 John E Harvey Sterilizer
US2525201A (en) * 1947-05-23 1950-10-10 John K Beynon Door operated oven rack structure
US2530595A (en) * 1947-08-27 1950-11-21 Selas Corp Of America Tile furnace
FR1008107A (fr) * 1949-01-13 1952-05-14 Perfectionnements aux fours pour la cuisson de produits alimentaires tels que pain, pâtes, biscuits et similaires
US2930333A (en) * 1955-10-21 1960-03-29 Konink Verkade Fabricken N V Oven for baking, heating or keeping bakers' wares at a constant temperature
US3255897A (en) * 1962-06-08 1966-06-14 Concrete Building Units Co Inc Apparatus for conveying and treating articles
US3402683A (en) * 1965-12-10 1968-09-24 Ti Pe Elmeko Discontinuous baking oven

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1365686A (en) * 1918-10-22 1921-01-18 John E Harvey Sterilizer
US2525201A (en) * 1947-05-23 1950-10-10 John K Beynon Door operated oven rack structure
US2530595A (en) * 1947-08-27 1950-11-21 Selas Corp Of America Tile furnace
FR1008107A (fr) * 1949-01-13 1952-05-14 Perfectionnements aux fours pour la cuisson de produits alimentaires tels que pain, pâtes, biscuits et similaires
US2930333A (en) * 1955-10-21 1960-03-29 Konink Verkade Fabricken N V Oven for baking, heating or keeping bakers' wares at a constant temperature
US3255897A (en) * 1962-06-08 1966-06-14 Concrete Building Units Co Inc Apparatus for conveying and treating articles
US3402683A (en) * 1965-12-10 1968-09-24 Ti Pe Elmeko Discontinuous baking oven

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030476A (en) * 1976-03-05 1977-06-21 Bevles Co., Inc. Heated cabinet for food
JPS54163200U (fr) * 1978-05-08 1979-11-15
JPS54147991A (en) * 1978-05-08 1979-11-19 Naigai Shisetsu Kougiyou Kk Rotary baking apparatus
JPS5714054Y2 (fr) * 1978-05-08 1982-03-23
JPS57115894U (fr) * 1981-12-24 1982-07-17
JPS5822544Y2 (ja) * 1981-12-24 1983-05-13 内外施設工業株式会社 回転式焼成装置
US6263693B1 (en) * 1996-09-23 2001-07-24 Andrew J. Gladd, Sr. Alternating horizontal air flow chiller
US20060210382A1 (en) * 2004-10-14 2006-09-21 Distrobot Systems, Inc. Inventory system with mobile drive unit and inventory holder
WO2006044108A3 (fr) * 2004-10-14 2007-05-18 Kiva Sys Inc Systeme d'inventaire comportant une unite d'entrainement mobile et un support d'inventaire
US7402018B2 (en) * 2004-10-14 2008-07-22 Kiva Systems, Inc. Inventory system with mobile drive unit and inventory holder
US20090311399A1 (en) * 2006-09-18 2009-12-17 Michael Koos Baking oven having a suspended baked goods carrier
US11395497B2 (en) 2010-03-04 2022-07-26 Revent International Ab Device for baking dough-based food products, net and method for baking such products
WO2012152876A3 (fr) * 2011-05-10 2013-01-03 Revent International Ab Dispositif permettant d'ajuster la hauteur d'un chariot-étagère dans un four à chariots-étagères
JP2014518623A (ja) * 2011-05-10 2014-08-07 レーベント インターナショナル アービー ラックオーブン中のラックの高さを調整するための装置
US9526255B2 (en) 2011-05-10 2016-12-27 Revent International Ab Device for adjusting the height of a rack in a rack oven
US20150245622A1 (en) * 2012-09-12 2015-09-03 Revent International Ab Hot air rack oven
US9961906B2 (en) * 2012-09-12 2018-05-08 Revent International Ab Hot air rack oven
WO2014042586A1 (fr) * 2012-09-14 2014-03-20 Revent International Ab Porte de four et système de chariot
WO2016126738A1 (fr) * 2015-02-03 2016-08-11 Lbc Bakery Equipment, Inc. Four à convection pourvu d'un échangeur de chaleur à contre-courant linéaire
US10314315B2 (en) 2015-02-03 2019-06-11 Lbc Bakery Equipment, Inc. Convection oven with linear counter-flow heat exchanger

Also Published As

Publication number Publication date
DE1937472C3 (de) 1978-04-06
DE1937472B2 (de) 1977-08-11
GB1231302A (fr) 1971-05-12
DE1937472A1 (de) 1970-08-27
SE322740B (fr) 1970-04-20

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