EP0464323B1 - Cooking hob - Google Patents

Cooking hob Download PDF

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Publication number
EP0464323B1
EP0464323B1 EP91105796A EP91105796A EP0464323B1 EP 0464323 B1 EP0464323 B1 EP 0464323B1 EP 91105796 A EP91105796 A EP 91105796A EP 91105796 A EP91105796 A EP 91105796A EP 0464323 B1 EP0464323 B1 EP 0464323B1
Authority
EP
European Patent Office
Prior art keywords
plate
markings
cooking
glass
kitchenware
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
EP91105796A
Other languages
German (de)
French (fr)
Other versions
EP0464323A2 (en
EP0464323A3 (en
Inventor
Klaus Dipl.-Ing. Gressenich
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.)
BOSCH-SIEMENS HAUSGERAETE GMBH
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0464323A2 publication Critical patent/EP0464323A2/en
Publication of EP0464323A3 publication Critical patent/EP0464323A3/en
Application granted granted Critical
Publication of EP0464323B1 publication Critical patent/EP0464323B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/68Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits

Definitions

  • the invention relates to a hob according to the preamble of claim 1.
  • a cooking surface with a ceramic plate is known (EP-A-03 13 137), in which the upper shelf is smooth and the underside of the plate outside the cooking area has a roughened structure, as a result of which the passage of light in the cooking area is different from that outside this cooking area.
  • a similar effect is achieved with a hotplate according to DE 35 03 576 A1, where outside the cooking area the underside of the plate is additionally provided with an opaque coating.
  • the object of the invention is to simplify the markings even further and to make them indestructible.
  • markings are produced in a simple manner by incorporating slight depressions into the surface of the plate, e.g. by laser technology in such a way that the surface of the depressions has a greater roughness (matting) than the rest of the plate surface.
  • the different surface structure of whatever type ensures that the markings are clearly recognizable on account of the different optical reflection behavior or the different optical refraction quotient compared to the other plate material.
  • Such optically recognizable material structures can be provided not only on the plate surface forming the standing surface of the hob, but also at any other point on the plate surface.
  • the hob shown in the figures has a plate 1 made of glass-ceramic material, which is bordered by a frame 2. Such a hob can be used in a corresponding cutout of a kitchen worktop. Below the plate 1 there are several electric radiators, not shown, e.g. Radiant heater, arranged. To mark or mark the corresponding cooking surfaces immediately above these radiators, the plate 1 has markings 3 in the form of circular or oval lines, which mark circular or concentric cooking surfaces 4, 5, 6, 7 and an oval cooking surface 8 in their contours. As shown in particular in the sectional view according to FIG. 2, these markings 3 and 3 'are formed by linear material or surface structures which differ from the material or surface structure of the adjacent plate material. In Fig.
  • recesses 9 are provided in the plate surface with a surface structure which has a greater roughness than the surface structure of the plate 1. It is sufficient if these recesses 3 have a depth of a few hundredths of a millimeter; if necessary, a light, line-shaped or point-shaped roughening of the plate surface is sufficient, as illustrated at point 3 'in FIG. 1.
  • Such a different material or surface structure can be produced in a simple manner by means of laser technology.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Surface Treatment Of Glass (AREA)
  • Table Devices Or Equipment (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Cookers (AREA)
  • Devices For Warming Or Keeping Food Or Tableware Hot (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

In glass ceramic cooking hobs, a decoration is usually printed on the surface receiving the kitchenware, e.g. to mark the cooking areas. It is disadvantageous that, when the kitchenware is displaced on the receiving surface, this decoration is rubbed off and after a long period of use becomes unrecognisable. <??>According to the innovation, this is avoided in that, for marking e.g. the cooking areas, the markings are formed by the plate material itself, which has in the region of these markings, a material structure which is different, e.g. matt, from the usual glass material. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Kochfeld gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a hob according to the preamble of claim 1.

Bei Glaskeramik-Kochfeldern ist es üblich, auf der ebenen Stellflache ein Dekor aufzudrucken, insb. zum Zwecke der Markierung der einzelnen beheizbaren Kochflächen. Hierbei besteht das Problem, daß durch verschieben von Geschirr oder Töpfen mit rauhen Boden das Dekor nach und nach abgerieben wird. Diese Nachteile werden gemaß einem anderen Vorschlag (DE-GM 88 01 334.0) dadurch weitgehend vermieden, daß in der Stellfläche der Platte an den Stellen des vorgesehenen Dekors Vertiefungen vorgesehen sind, die mit einem Dekormaterial, z.B. mit einer druckfähigen Dekorfarbe ausgefüllt sind.In the case of glass ceramic hobs, it is customary to print a decor on the flat surface, especially for the purpose of marking the individual heated cooking surfaces. The problem here is that the decor is gradually rubbed off by moving dishes or pots with a rough bottom. According to another proposal (DE-GM 88 01 334.0), these disadvantages are largely avoided by providing depressions in the surface of the plate at the locations of the decor provided, which are covered with a decorative material, e.g. are filled with a printable decor color.

Ferner ist eine Kochfläche mit glaskeramischer Platte bekannt (EP-A-03 13 137), bei der die obere Stellfläche glatt ist und die Plattenunterseite außerhalb des Kochbereiches eine aufgerauhte Struktur besitzt, wodurch der Lichtdurchtritt im Kochbereich unterschiedlich ist zu demjenigen außerhalb dieses Kochbereiches. Eine ähnliche Wirkung wird erzielt bei einer Kochplatte gemäß DE 35 03 576 A1, wo außerhalb des Kochbereiches die Plattenunterseite zusätzlich noch mit einer lichtundurchlässigen Beschichtung versehen ist.Furthermore, a cooking surface with a ceramic plate is known (EP-A-03 13 137), in which the upper shelf is smooth and the underside of the plate outside the cooking area has a roughened structure, as a result of which the passage of light in the cooking area is different from that outside this cooking area. A similar effect is achieved with a hotplate according to DE 35 03 576 A1, where outside the cooking area the underside of the plate is additionally provided with an opaque coating.

Der Erfindung liegt die Aufgabe zugrunde, die Markierungen noch weiter zu vereinfachen und unzerstörbar zu gestalten.The object of the invention is to simplify the markings even further and to make them indestructible.

Diese Aufgabe wird erfindungsgemäß gelöst durch die im Kennzeichnungsteil des Patentanspruches 1 angegebenen Merkmale.This object is achieved by the features specified in the characterizing part of claim 1.

In einfacher Weise sind diese Markierungen hergestellt durch Einarbeitung von geringfügigen Vertiefungen in die Plattenoberfläche, z.B. durch Laser-Technik derart, daß die Oberfläche der Vertiefungen eine größere Rauhigkeit (Mattierung) besitzt als die übrige Plattenoberfläche. In jedem Falle ist durch die unterschiedliche Oberflächenstruktur gleich welcher Art gewährleistet, daß aufgrund des gegenüber dem übrigen Plattenmaterial unterschiedlichen optischen Reflexionsverhaltens bzw. des unterschiedlichen optischen Brechungsquotienten die Markierungen deutlich erkennbar sind. Solche optisch gut erkennbare Materialstrukturen können nicht nur an der die Stellfläche des Kochfeldes bildenden Plattenoberfläche, sondern auch an jeder anderen Stelle der Plattenoberfläche vorgesehen sein.These markings are produced in a simple manner by incorporating slight depressions into the surface of the plate, e.g. by laser technology in such a way that the surface of the depressions has a greater roughness (matting) than the rest of the plate surface. In any case, the different surface structure of whatever type ensures that the markings are clearly recognizable on account of the different optical reflection behavior or the different optical refraction quotient compared to the other plate material. Such optically recognizable material structures can be provided not only on the plate surface forming the standing surface of the hob, but also at any other point on the plate surface.

Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispieles nachstehend erläutert.

Fig. 1
zeigt in perspektivischer Darstellung ein elektrisches Kochfeld und
Fig. 2
in vergrößerter Darstellung ausschnittsweise einen Schnitt entlang der Linie II-II in Fig. 1.
The invention is explained below using an exemplary embodiment shown in the drawing.
Fig. 1
shows a perspective view of an electric hob and
Fig. 2
1 shows an enlarged section of a section along line II-II in FIG. 1.

Das in den Figuren dargestellte Kochfeld besitzt eine Platte 1 aus glaskeramischem Material, die eingefaßt ist von einem Rahmen 2. Ein solches Kochfeld ist einsetzbar in einen entsprechenden Ausschnitt einer Küchen-Arbeitsplatte. Unterhalb der Platte 1 sind mehrere, nicht weiter dargestellte elektrische Heizkörper, z.B. Strahlungsheizkörper, angeordnet. Zur Markierung oder Kennzeichnung der entsprechenden Kochflächen unmittelbar oberhalb dieser Heizkörper besitzt die Platte 1 Markierungen 3 in Form von kreisrunden oder ovalen Linien, die kreisrunde bzw. konzentrische Kochflächen 4, 5, 6, 7 sowie eine ovale Kochfläche 8 in ihren Umrissen kennzeichnen. Wie insb. die Schnittdarstellung gemäß Fig. 2 zeigt, werden diese Markierungen 3 bzw. 3' gebildet durch linienförmige Material- bzw. Oberflächenstrukturen, die von der Material- bzw. Oberflächenstruktur des angrenzenden Plattenmaterials unterschiedlich ist. In Fig. 2 ist angedeutet, daß in die Plattenoberfläche eingearbeitete Vertiefungen 9 vorgesehen sind mit einer Oberflächenstruktur, die eine größere Rauhigkeit hat als die Oberflächenstruktur der Platte 1. Es genügt, wenn diese Vertiefungen 3 eine Tiefe von wenigen hundertstel Millimeter besitzen; gegebenenfalls genügt ein leichtes, linienförmgies oder auch punktförmiges Aufrauhen der Plattenoberfläche, wie an der Stelle 3' in Fig. 1 verdeutlicht. In einfacher Weise kann eine solche unterschiedliche Material- oder Oberflächenstruktur mittels Laser-Technik erzeugt werden.The hob shown in the figures has a plate 1 made of glass-ceramic material, which is bordered by a frame 2. Such a hob can be used in a corresponding cutout of a kitchen worktop. Below the plate 1 there are several electric radiators, not shown, e.g. Radiant heater, arranged. To mark or mark the corresponding cooking surfaces immediately above these radiators, the plate 1 has markings 3 in the form of circular or oval lines, which mark circular or concentric cooking surfaces 4, 5, 6, 7 and an oval cooking surface 8 in their contours. As shown in particular in the sectional view according to FIG. 2, these markings 3 and 3 'are formed by linear material or surface structures which differ from the material or surface structure of the adjacent plate material. In Fig. 2 it is indicated that recesses 9 are provided in the plate surface with a surface structure which has a greater roughness than the surface structure of the plate 1. It is sufficient if these recesses 3 have a depth of a few hundredths of a millimeter; if necessary, a light, line-shaped or point-shaped roughening of the plate surface is sufficient, as illustrated at point 3 'in FIG. 1. Such a different material or surface structure can be produced in a simple manner by means of laser technology.

Claims (2)

  1. Cooking field with a planar crockery support surface which is formed by a plate of glass or glass-ceramic material and which in particular for the identification of the heatable cooking surfaces displays markings which formed by line-shaped interruptions, which are formed by removal of material, of the otherwise smooth surface, characterised thereby, that the line-shaped interruptions (3) are formed exclusively by depressions (9), which are worked into the plate surface and the surfaces of which are structured to be rough.
  2. Cooking field according to claim 1, characterised thereby, that the markings (3) are formed by a depression (9), which is worked into the plate surface and the surface structure of which differs from that of the surfaces surrounding it, for example due to frosting.
EP91105796A 1990-07-03 1991-04-11 Cooking hob Expired - Lifetime EP0464323B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9010072U DE9010072U1 (en) 1990-07-03 1990-07-03 Hob
DE9010072U 1990-07-03

Publications (3)

Publication Number Publication Date
EP0464323A2 EP0464323A2 (en) 1992-01-08
EP0464323A3 EP0464323A3 (en) 1992-02-19
EP0464323B1 true EP0464323B1 (en) 1994-10-12

Family

ID=6855222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91105796A Expired - Lifetime EP0464323B1 (en) 1990-07-03 1991-04-11 Cooking hob

Country Status (6)

Country Link
US (1) US5261387A (en)
EP (1) EP0464323B1 (en)
JP (1) JPH04227427A (en)
AT (1) ATE112841T1 (en)
DE (2) DE9010072U1 (en)
ES (1) ES2063393T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004002766A1 (en) * 2004-01-20 2005-08-11 Schott Ag Flat glass-ceramic component, comprises a matt area formed by coating glass on the glass-ceramic using a sieve printing technique
DE102016111438A1 (en) 2016-06-22 2017-12-28 Schott Ag Glass ceramic element with intrinsic decoration and process for its production

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD384239S (en) * 1993-02-15 1997-09-30 Bosch-Siemens Hausgeraete Gmbh Cooktop
DE4333334C2 (en) * 1993-09-30 1996-10-17 Schott Glaswerke Glass ceramic plate as part of a cooking appliance
US5640947A (en) * 1995-02-15 1997-06-24 Shute; Alan B. Counter-top cooking unit using natural stone
USD431156S (en) * 1996-04-24 2000-09-26 Lewis Robert A Surface ornamentation for a control panel on a range top
DE19700551A1 (en) * 1997-01-10 1998-07-16 Ego Elektro Geraetebau Gmbh Hob for electric cooker
DE29722103U1 (en) * 1997-12-16 1998-03-05 Schulte, Uwe, 51065 Köln Hob arrangement
DE19825310A1 (en) * 1998-06-05 1999-12-09 Bsh Bosch Siemens Hausgeraete Control unit for an electrical household appliance
JP2000034342A (en) * 1998-07-16 2000-02-02 Nippon Ester Co Ltd Production of polyester
EP1046865A3 (en) * 1999-04-19 2003-04-23 Curvet SPA Tempered glass hob for kitchen
DE10000657C2 (en) * 2000-01-11 2002-12-12 Schott Glas Glass ceramic plate
DE10237845A1 (en) * 2002-08-19 2004-03-04 Cramer Sr, S.R.O. kitchen top
GB0404630D0 (en) * 2004-03-02 2004-04-07 Ceramaspeed Ltd Electric heating assembly
FR2879592B1 (en) * 2005-01-20 2007-03-02 Schott Ag FLAT ARTICLE IN VITROCERAMIC, HAVING AT LEAST ONE MATE ZONE AND PROCESS FOR PRODUCING SUCH ARTICLE IN VITROCERAMIC
FR2896305B1 (en) * 2006-01-16 2015-01-23 Eurokera VITROCERAMIC PLATES, PROCESS FOR PRODUCING THE SAME, AND COOKING TABLES EQUIPPED WITH THE SAME
ES2321261B1 (en) * 2007-03-13 2010-03-04 Bsh Electrodosmeticos España S.A. COOKING FIELD WITH A TEMPERATURE SENSOR AREA.
KR101353313B1 (en) * 2008-02-25 2014-01-21 삼성전자주식회사 Electric range and induction coil unit
USD708003S1 (en) * 2010-12-27 2014-07-01 Western Industries, Inc. Cook top
USD978604S1 (en) * 2020-06-12 2023-02-21 Cooktek Induction Systems Llc Induction warmer
US20240167694A1 (en) * 2022-11-23 2024-05-23 Whirlpool Corporation Cooktop assembly with kinesthetic feature

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870828A (en) * 1953-09-14 1959-01-27 Selas Corp Of America Radiant heat gas range burner
US3406279A (en) * 1965-11-12 1968-10-15 Corning Glass Works Cooking surfaces
US3947652A (en) * 1974-06-28 1976-03-30 White-Westinghouse Corporation Cooking surface assembly for an induction range
NL176301C (en) * 1974-08-24 Schwank Gmbh APPLIANCE WITH AT LEAST ONE GAS BURNER FOR A HOB.
JPS6129626A (en) * 1984-07-20 1986-02-10 Matsushita Electric Ind Co Ltd Electric cooking heater
DE3433880A1 (en) * 1984-09-14 1986-03-27 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Cooking hob
EP0313137A1 (en) * 1987-10-21 1989-04-26 Koninklijke Philips Electronics N.V. Electric cooking apparatus
DE8801334U1 (en) * 1988-02-03 1988-03-17 Bosch-Siemens Hausgeräte GmbH, 8000 München Hob
DE8804925U1 (en) * 1988-04-14 1988-06-23 Buderus Küchentechnik GmbH, 6348 Herborn Hob with multiple cooking zones

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004002766A1 (en) * 2004-01-20 2005-08-11 Schott Ag Flat glass-ceramic component, comprises a matt area formed by coating glass on the glass-ceramic using a sieve printing technique
DE102004002766B4 (en) * 2004-01-20 2008-10-16 Schott Ag Glass ceramic plate with at least one frosted area and method for producing such a glass ceramic plate
DE102016111438A1 (en) 2016-06-22 2017-12-28 Schott Ag Glass ceramic element with intrinsic decoration and process for its production

Also Published As

Publication number Publication date
JPH04227427A (en) 1992-08-17
ATE112841T1 (en) 1994-10-15
DE59103209D1 (en) 1994-11-17
EP0464323A2 (en) 1992-01-08
US5261387A (en) 1993-11-16
ES2063393T3 (en) 1995-01-01
DE9010072U1 (en) 1990-09-06
EP0464323A3 (en) 1992-02-19

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