EP2784395B1 - Cavité de four pour un four de cuisson - Google Patents

Cavité de four pour un four de cuisson Download PDF

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Publication number
EP2784395B1
EP2784395B1 EP13160863.0A EP13160863A EP2784395B1 EP 2784395 B1 EP2784395 B1 EP 2784395B1 EP 13160863 A EP13160863 A EP 13160863A EP 2784395 B1 EP2784395 B1 EP 2784395B1
Authority
EP
European Patent Office
Prior art keywords
edge section
sealing
section
oven cavity
lamp
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.)
Active
Application number
EP13160863.0A
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German (de)
English (en)
Other versions
EP2784395A1 (fr
Inventor
Marco Böckler
Erhard Käser
Daniel Krämer
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.)
Electrolux Appliances AB
Original Assignee
Electrolux Appliances AB
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 Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to EP13160863.0A priority Critical patent/EP2784395B1/fr
Publication of EP2784395A1 publication Critical patent/EP2784395A1/fr
Application granted granted Critical
Publication of EP2784395B1 publication Critical patent/EP2784395B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • F24C7/067—Arrangement or mounting of electric heating elements on ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/008—Illumination for oven cavities

Definitions

  • the present invention relates to oven cavity for a cooking oven according to the preamble of claim 1.
  • EP 0 786 630 A1 discloses an illumination arrangement for the muffle space of a baking oven with a transparent lamp cover and a lamp housing that is inserted within the opening of a muffle wall and with a sealing element for sealing the illumination arrangement from the muffle space.
  • the sealing element is a mounting part of lamp housing and pressed against the muffle wall as well as against the lamp cover.
  • Oven cavities are usually produced from metal sheets, wherein the single parts of the cavity are manufactured in a die cutting process or a similar process. Tolerances of the cavity walls resulting from manufacturing process, thus, may be not sufficient to form a proper connection between the cavity wall and a unit such as a lamp. Consequently, it is possible that gaps between the cavity wall and the lamp occur as a source of problems causing condensation and energy loss.
  • DE 103 14 572 A1 discloses a cooking oven with an oven cavity and an air circulation blower.
  • a blower channel with a fan impeller is arranged besides the oven cavity.
  • An air guide plate separates the blower channel from the oven cavity.
  • a duct penetrates said blower channel and extends from the cavity wall to the air guide plate in order to provide space for accessories.
  • the duct includes a flange aligned to the cavity wall.
  • An open end of the duct is connected to a collar enclosing an opening in the air guide plate. The open end of the duct and the collar form a labyrinth seal.
  • DE 10 2008 011 935 A1 discloses a cooking oven with an oven cavity and a blower channel in the tops side of said cooking oven.
  • An air guide plate separates the blower channel from the oven cavity.
  • a duct penetrates said blower channel and extends from a cavity wall to the air guide plate.
  • the duct is provided for receiving a plug-in socket.
  • a sealing element is arranged between the lower end of the duct and the air guide plate. The sealing element encloses an opening and a collar of the air guide plate. The collar is directed upwards and encloses in turn said opening.
  • the second edge section and said sealing section extend at least partially in parallel and distanced from each other and said first edge section and a main body of said functional unit extend at least partially in parallel and distanced from each other and in an angle relative to said second edge section and said sealing section.
  • the main idea of the present invention is to provide a connection between the cavity wall and a functional unit that compensates tolerances, in particular with regard to planarity, in the region of the opening to which the functional unit is to be mounted.
  • a protruding sealing section is therefore provided that is in contact with the cavity wall in a certain distance from the opening.
  • the first edge section projects towards the main body of the functional part. The first edge section diminishes the distance between the cavity wall and the functional part in that region and, thus, contributes advantageously to the tightness of the connection.
  • a functional unit shall be understood as every functional component to be mounted within the oven cavity and whose connection to the cavity wall might create defects in tightness.
  • a labyrinth sealing shall be understood as a sealing arrangement providing no or few contact between the members of the gap to be sealed, but providing the sealing effect by extending the length of the gap to be sealed, in particular by forming a meandering gap.
  • a labyrinth sealing and a contact sealing can, of course, be provided in combination and can contribute both to a tight sealing.
  • the contact between protruding sealing section and first edge section comprises e.g. gaps or other geometrical irregularities and is, therefore, not completely tight
  • the labyrinth seal seals the connection between functional component and oven cavity wall.
  • said functional unit comprises at least one main body which is distanced from the second edge section by means of the sealing section.
  • the sealing section is in contact (in other words: in touch) with the cavity wall that surrounds the functional unit in a region that has a smaller tolerance than the region that is immediately adjacent to the opening.
  • said second edge section projects towards the interior of the oven cavity.
  • the first edge section projects towards the interior space of the oven cavity and also towards the main body of the functional part.
  • the first edge section diminishes the distance between the cavity wall and the functional part in that region and, thus, contributes advantageously to the tightness of the connection.
  • said second edge section and said sealing section extend at least partially in parallel and distanced from each other and in that said first edge section and a main body of said functional unit extend at least partially in parallel and distanced from each other and in an angle relative to said second edge section and said sealing section, in particular by forming a labyrinth-like flow path in the region of the second edge section additionally to the sealing contact between sealing component and first edge section.
  • said sealing component is a heating element flange, in particular made of a metallic material, for attaching a heating element to the cavity wall.
  • connection For the connection of a heating element to the cavity wall, the connection is particularly advantageous, because the heat transfer from the heating element via the heating element flange to the cavity wall is reduced in comparison to a heating flange resting in plane contact on the cavity wall.
  • said heating element flange has a substantially flat main body, wherein said sealing section is formed integrally to said main body.
  • the heating element flange can be produced, e.g. from a metal part. Furthermore, the heating element flange and the sealing section can be formed in a single manufacturing step.
  • said functional unit is a lamp unit for being mounted to the cavity wall.
  • said lamp unit comprises at least one lamp cover, in particular made of a transparent material, and a lamp housing with at least one housing wall, wherein said lamp cover is fixedly connected to said housing wall.
  • a lamp unit is enabled to be mounted in said opening of the cavity wall.
  • the lamp unit can be mounted or installed as a whole.
  • said housing wall comprises at least one holding portion and at least one attaching portion, wherein said attaching portion is arranged angular, in particular in a right angle, relative to said holding portion, in particular wherein said lamp cover is fixedly connected to said attaching portion, preferably such, that the lamp cover extends substantially perpendicular to said housing wall.
  • the lamp unit in such embodiment it is possible to insert the lamp unit as a whole with a movement that is perpendicular to the cavity wall or the opening into the opening.
  • the lamp cover and/or the attaching portion can, thus, cover the opening completely. Lamp cover and attaching portion can contribute beneficially to the sealing effect.
  • said housing wall comprises at least one of said sealing sections.
  • the housing wall comprises a sealing section
  • a sealing is formed between the lamp housing and the interior of the cavity. It can be advantageously prevented that vapour or steam or a hot air flow can enter the interior space of the lamp housing which prevents damage of the electronic parts inside of the lamp housing. It is further advantageously prevented that vapour or steam or a hot air flow can leave the cavity and reach the exterior of the cavity.
  • the lamp cover comprises at least one of said sealing sections, in particular such, that said sealing section is formed integrally to said lamp cover.
  • said second edge section is at least partially in substantially sealing contact with said functional unit, in particular with a main body of said functional unit.
  • said second edge section is distanced from said functional unit, in particular distanced from a main body of said functional unit.
  • said sealing section is arranged around a complete peripheral circumference of said functional unit.
  • the complete circumference of the opening can be sealed by means of the sealing section. No additional sealing means are necessary.
  • said cavity wall is made of, in particular enamelled, sheet metal and in that said second edge section is a bent part of the sheet metal.
  • FIG 1 illustrates a cavity wall 1 with a heating element flange 2 and a heating element 3 fastened to the cavity wall 1 by means of the heating element flange 2.
  • the heating element can be a standard heating element made of a wire or a rod which is guided through the heating element flange 2.
  • the heating element flange 2 can be fastened to the cavity wall 1 (not shown) by means of screws or by means of nuts and springs for enabling the heating element 3 to be demounted by a drop down movement from inside of the oven cavity.
  • the cavity wall 1 has an opening 4, through which the heating element 3 is guided.
  • the heating element 3 is electrically connected to a power source for operating the heating element 3.
  • the heating element 3 extends in the interior space of the oven cavity and, thus, the interior space of the oven cavity can be heated by operating the heating element.
  • the heating element flange 2 is arranged such, that it covers or closes the opening 4 in a sealing or air tight manner.
  • FIG 3 illustrates a detailed sectional side view of the cavity wall with heating element flange and heating element shown in FIG 2 .
  • the cavity wall 1 comprises an opening 4 which might be a cut out or the like.
  • the cavity wall 1 comprises a first edge section 5 and a second edge section 6 arranged adjacent to first edge section 5 which surround the opening 4 at least partially.
  • the second edge section 6 can be formed by bending or flanging of material of the cavity wall 1 which surrounds the opening 4.
  • the second edge section 6 can be a peripheral flange which extends circumferentially around the opening 4.
  • the heating element flange 2 can be made of a substantially flat sheet, e.g. of a metal material, having openings or cutouts for guiding through the heating element 3.
  • the heating element flange 2 comprises a main body 7 from which a peripheral section is bent of or from which a peripheral section extends in an angle relative to the main body 7.
  • the peripheral section is formed as a sealing section 8 of the heating element flange 2.
  • the sealing section 8 forms a contact with the first edge section 5 of the cavity wall 1.
  • the second edge section 6 of the cavity wall 1 extends distanced from the sealing section 8 an in parallel to it. Due to tolerances in the manufacturing process, in particular in the manufacturing process of the metal parts, it might occur that the contact between sealing section 8 and first edge section 5 might comprise gaps. Such gaps may be generated when the sealing section 8 is not ideally straight or has other geometrical irregularities.
  • connection between sealing section 8 and first edge section 5 is not completely tight and an air flow or vapour or steam from the interior space of the cavity can flow through a gap between sealing section 8 and first edge section 5, it is deflected at least twice by the second edge section 6 of the cavity wall 1 and sealing section 8 and main body 7 of the heating element flange 2.
  • a labyrinth sealing between the interior I and the exterior E is created.
  • the second end section 6 is not in contact with the heating element flange 2. It is also possible to form a connection wherein the sealing section 8 of the heating element flange 2 is in contact with the first edge section 5 and wherein the second edge section 6 is in contact with the main body 7. Also in this contact, gaps may be generated which can be compensated by the labyrinth seal.
  • the second end section 6 can be arranged such that it is not in contact with the heating element flange 2, but as close as possible to the heating element flange 2. With other words, the second end section 6 can be arranged with a minimal gap between itself and the heating element flange 2.
  • FIG 4 and FIG 5 illustrate a sectional side view of a cavity wall 10 with a lamp mounted to said cavity wall 10.
  • the lamp is mounted or installed into an opening 40 arranged in the cavity wall 10.
  • the lamp comprises a lamp cover 9 arranged on the interior of the cavity.
  • the lamp cover 9 can be at least partially made of a material that allows light to pass through, e.g. a glass or plastics material.
  • the lamp has, further, a lamp housing with one or more housing walls 15, inside of the lamp housing a lamp or another illuminating means can be arranged.
  • the light from the illuminating means is intended to pass through the lamp cover 9 to illuminate the interior space of the oven cavity.
  • the lamp cover 9 and the lamp housing are mounted or installed into the opening 40 as a lamp unit.
  • the cavity wall 10 is formed like the cavity wall 1 as shown in FIG 1 to 3 , i.e. the cavity wall 10 comprises an opening 40, wherein the cavity wall 10 comprises a first edge section 50 and a second edge section 60 arranged adjacent to the first edge section 50 and both surrounding the opening 40.
  • the second edge section 60 is arranged angularly relative to the first edge section 50, e.g. in a right angle.
  • the housing wall 15 of the lamp housing comprises an enclosure portion 19 and an attaching portion 16.
  • the enclosure portion 19 forms a part of a housing for the illuminating means and/or electronic components arranged within the lamp housing.
  • the attaching portion 16 is arranged angularly relative to the enclosure portion 19, e.g. also in a right angle. Further, the attaching portion 16 can be formed integrally to the enclosure portion 19. Furthermore, the attaching portion 16 is provided for being attached, e.g. glued or welded, to the lamp cover 9, in particular to a second surface 14 of the lamp cover.
  • the lamp cover 9 has a first surface 13 which is directed towards the interior I of the oven cavity and a second surface 14 which is directed towards the exterior E in a mounted state of the lamp. Furthermore, the lamp cover 9 has a substantially flat main body 11 and at least one sealing section 12. The sealing section 12 is integrally formed to the main body 11, but might also be formed by an additional part.
  • the attaching portion 16 is contact to the second edge portion 60, wherein the sealing section 12 encompasses the second edge section 60 and is in contact with the first edge section 50.
  • the sealing section 12 can be formed nose-like and can be provided as a circumferential portion of the lamp cover 9, completely surrounding the main body 11.
  • an embodiment comprises resilient properties of the material of the lamp cover 9 or comprises a resilient arrangement of the lamp cover 9 on the housing wall 15 of the lamp housing.
  • FIG 6 and FIG 7 illustrate a sectional side view of the cavity wall 100 with a lamp mounted to said cavity wall 100 according to a further embodiment of the invention.
  • the lamp comprises a lamp cover 900 and a lamp housing with one or more housing walls 150.
  • the housing wall 150 has a holding portion 190 and an attaching portion 160, wherein the attaching portion 160 is arranged in a right angle relative to the holding portion 190.
  • a sealing section 170 adjoins to the attaching portion 160 in a right angle, such that the holding portion 190, attaching portion 160 and sealing section 170 form a U-shape.
  • the cavity wall 100 has a first edge section 500 and a second edge section 600, wherein the second edge section 600 is arranged in a right angle relative to the first edge section 500.
  • the lamp cover 900 has a substantially flat main body 110 as well as a first surface 130 which is directed towards the interior I of the oven cavity and a second surface 140 which is directed towards the exterior E in a mounted state of the lamp.
  • the second surface 140 of the lamp cover 900 is arranged in plane contact with attaching portion 160 of the housing wall 150.
  • the lamp cover 900 is fixed to the attaching portion 160 in a suitable manner.
  • the sealing section 170 encompasses the second edge portion 600 of the housing wall 100 and is in contact with the first edge portion 500.
  • the second edge portion 600 is arranged in between the sealing section 170 and the holding portion 190 and, thus, forms a barrier for an air flow which passes through a possible gap between sealing section 170 and first edge portion 500.
  • a labyrinth sealing is formed.
  • the contact between the protruding sealing section 8, 12, 170 and the first edge section 5, 50, 500 can be a completely tight contact or the protruding sealing section 8, 12, 170 can be completely distanced from the first edge section 5, 50, 500 or the protruding sealing section 8, 12, 170 and the first edge section 5, 50, 500 can be in contact with each other having a gap or gaps that can be provided in this contact due to geometrical irregularities.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)

Claims (14)

  1. Cavité de four pour un four de cuisson, comprenant au moins une paroi de cavité (1, 10, 100) et au moins une unité fonctionnelle avec au moins un composant d'étanchéité (2, 9, 150) monté ou pouvant être monté dans une ouverture (4, 40, 400) de ladite paroi de cavité (1, 10, 100), ladite paroi de cavité (1, 10, 100) comprenant au moins une première section périphérique (5, 50, 500) et au moins une seconde section périphérique (6, 60, 600), la seconde section périphérique étant disposée autour de ladite ouverture (4, 40, 400) et permettant de tenir ladite première section périphérique (5, 50, 500) à distance de ladite ouverture (4, 40, 400), et ladite seconde section périphérique (6, 60, 600) faisant saillie à un certain angle, en particulier à un angle sensiblement droit, par rapport à la première section périphérique (5, 50, 500), de manière à former un rebord saillant autour de l'ouverture, et ledit composant d'étanchéité formant au moins une section d'étanchéité saillante (8, 12, 170) qui est en contact sensiblement étanche avec ladite première section périphérique (5, 50, 500) et/ou qui forme un joint à labyrinthe avec lesdites première section périphérique et seconde section périphérique,
    caractérisée en ce que :
    ladite seconde section périphérique (6, 60, 600) et ladite section d'étanchéité (8, 12, 170) s'étendent au moins en partie en parallèle et à une certaine distance l'une de l'autre, et en ce que ladite première section périphérique (5, 50, 500) et un corps principal (7, 11, 110) de ladite unité fonctionnelle s'étendent au moins en partie en parallèle et à une certaine distance l'un de l'autre et suivant un certain angle par rapport à ladite seconde section périphérique (6, 60, 600) et ladite section d'étanchéité (8, 12, 170) en formant une trajectoire en labyrinthe dans la région de la seconde section périphérique en plus du contact d'étanchéité entre le composant d'étanchéité (2, 9, 150) et la première section périphérique (5, 50, 500), le contact entre la section d'étanchéité (8, 12, 170) et la première section périphérique (5, 50, 500) pouvant comprendre des espaces.
  2. Cavité de four selon la revendication 1,
    caractérisée en ce que ladite unité fonctionnelle comprend au moins un corps principal (7, 11, 110) qui est tenu à distance de la seconde section périphérique (6, 60, 600) au moyen de la section d'étanchéité (8, 12, 170) .
  3. Cavité de four selon la revendication 1 ou 2,
    caractérisée en ce que la seconde section périphérique (6, 60, 600) se projette vers l'intérieur (I) de la cavité de four.
  4. Cavité de four selon l'une des revendications précédentes, caractérisée en ce que ledit composant d'étanchéité est un rebord d'élément chauffant (2), en particulier constitué d'un matériau métallique, permettant de fixer un élément chauffant (3) à la paroi de cavité (1).
  5. Cavité de four selon la revendication 4,
    caractérisée en ce que ledit rebord d'élément chauffant (2) a un corps principal (7) sensiblement plat, ladite section d'étanchéité (8) faisant partie intégrante dudit corps principal (7).
  6. Cavité de four selon l'une des revendications 1 à 3,
    caractérisée en ce que ladite unité fonctionnelle est une unité lampe destinée à être montée sur la paroi de cavité (10, 100).
  7. Cavité de four selon la revendication 6,
    caractérisée en ce que ladite unité lampe comprend au moins un écran protecteur de lampe (9, 900), en particulier constitué d'un matériau transparent, et un logement de lampe avec au moins une paroi de logement (15, 150), ledit écran protecteur de lampe (9, 900) étant connecté fixe à ladite paroi de logement (15, 150) .
  8. Cavité de four selon la revendication 7,
    caractérisée en ce que ladite paroi de logement (15, 150) comprend au moins une partie de support (19, 190) et au moins une partie de fixation (16, 160), ladite partie de fixation (16, 160) étant disposée à un certain angle, en particulier à un angle droit, par rapport à ladite partie de support (19, 190), en particulier ledit écran protecteur de lampe (9, 900) étant connecté fixe à ladite partie de fixation (16, 160), de préférence de sorte que l'écran protecteur de lampe (9, 900) s'étende sensiblement perpendiculairement à ladite paroi de logement (15, 150).
  9. Cavité de four selon l'une des revendications 7 et 8, caractérisée en ce que ladite paroi de logement (15, 150) comprend au moins une desdites sections d'étanchéité (170).
  10. Cavité de four selon l'une des revendications 7, 8 et 9, caractérisée en ce que l'écran protecteur de lampe (9, 900) comprend au moins une desdites sections d'étanchéité (12), en particulier de sorte que ladite section d'étanchéité (12) fasse partie intégrante dudit écran protecteur de lampe (9, 900).
  11. Cavité de four selon l'une des revendications précédentes, caractérisée en ce que ladite seconde section périphérique (6, 60, 600) est au moins en partie en contact sensiblement étanche avec ladite unité fonctionnelle, en particulier avec un corps principal (7, 11, 110) de ladite unité fonctionnelle.
  12. Cavité de four selon l'une des revendications 1 à 10, caractérisée en ce que ladite seconde section périphérique (6, 60, 600) est située à distance de ladite unité fonctionnelle, en particulier à distance d'un corps principal (7, 11, 110) de ladite unité fonctionnelle.
  13. Cavité de four selon l'une des revendications précédentes, caractérisée en ce que ladite section d'étanchéité (8, 12, 170) est disposée autour d'une circonférence périphérique complète de ladite unité fonctionnelle.
  14. Cavité de four selon l'une des revendications précédentes, caractérisée en ce que ladite paroi de cavité (1, 10, 100) est en tôle, en particulier en tôle émaillée, et en ce que ladite seconde section périphérique (6, 60, 600) est une partie pliée de la tôle.
EP13160863.0A 2013-03-25 2013-03-25 Cavité de four pour un four de cuisson Active EP2784395B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13160863.0A EP2784395B1 (fr) 2013-03-25 2013-03-25 Cavité de four pour un four de cuisson

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13160863.0A EP2784395B1 (fr) 2013-03-25 2013-03-25 Cavité de four pour un four de cuisson

Publications (2)

Publication Number Publication Date
EP2784395A1 EP2784395A1 (fr) 2014-10-01
EP2784395B1 true EP2784395B1 (fr) 2019-05-08

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Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE8436425U1 (de) * 1984-12-13 1985-03-21 Buderus Ag, 6330 Wetzlar Befestigungsvorrichtung fuer die elektrischen heizkoerper eines gargeraetes
DE9017052U1 (fr) * 1990-02-08 1991-03-07 Broekelmann, Jaeger & Busse Gmbh & Co, 5760 Arnsberg, De
DE4121886C2 (de) * 1991-07-02 1999-02-04 Bosch Siemens Hausgeraete Leuchte für Mikrowellenöfen
KR19980063369A (ko) * 1996-12-12 1998-10-07 윤종용 전자렌지
DE10314572A1 (de) * 2003-03-31 2004-10-14 BSH Bosch und Siemens Hausgeräte GmbH Gargerät
KR20050056053A (ko) * 2003-12-09 2005-06-14 삼성전자주식회사 램프 조립체와 이를 구비한 조리장치
DE102008011935A1 (de) * 2008-02-29 2009-09-03 BSH Bosch und Siemens Hausgeräte GmbH Heißluft- oder Umluftofen
EP2265090B1 (fr) * 2009-05-02 2017-12-20 Electrolux Home Products Corporation N.V. Four micro-ondes avec système de régulateur d'alimentation
EP2554913B1 (fr) * 2011-08-05 2017-06-14 Electrolux Home Products Corporation N.V. Appareil de cuisson avec agencement de couplage pour pièce d'accessoire

Non-Patent Citations (1)

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Title
None *

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