EP0851177B1 - Joint d'étanchéité en élastomère, en particulier pour porte de four de cuisson - Google Patents

Joint d'étanchéité en élastomère, en particulier pour porte de four de cuisson Download PDF

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Publication number
EP0851177B1
EP0851177B1 EP96120322A EP96120322A EP0851177B1 EP 0851177 B1 EP0851177 B1 EP 0851177B1 EP 96120322 A EP96120322 A EP 96120322A EP 96120322 A EP96120322 A EP 96120322A EP 0851177 B1 EP0851177 B1 EP 0851177B1
Authority
EP
European Patent Office
Prior art keywords
gasket
oven
metal inserts
gasket according
strip
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
EP96120322A
Other languages
German (de)
English (en)
Other versions
EP0851177A1 (fr
Inventor
Angelo Faccoli
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.)
Posa SpA
Original Assignee
Posa SpA
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
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Application filed by Posa SpA filed Critical Posa SpA
Priority to ES96120322T priority Critical patent/ES2154380T3/es
Priority to AT96120322T priority patent/ATE198931T1/de
Priority to DE69611683T priority patent/DE69611683T2/de
Priority to EP96120322A priority patent/EP0851177B1/fr
Priority to PT96120322T priority patent/PT851177E/pt
Publication of EP0851177A1 publication Critical patent/EP0851177A1/fr
Application granted granted Critical
Publication of EP0851177B1 publication Critical patent/EP0851177B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F24C15/00—Details
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F24C15/021—Doors specially adapted for stoves or ranges sealings for doors or transparent panel

Definitions

  • the present invention relates to an elastomer sealing gasket, in particular of silicone rubber, particularly for cooking oven doors.
  • gaskets can be of the closed frame type, that is made up of four sides joined together to form a rectangle, or of the three-sided open-frame type, that is lacking the bottom side, the area in which there is normally less heat loss.
  • the gaskets currently used are obtained by bending, and possibly joining at the ends, a single hollow strip with hooking means situated at least in the areas where the strip is bent, that is at the corners of the frame.
  • Metal inserts with a widened base which is inserted in a corresponding opening made in the flat bottom wall of the gasket are used as hooking means.
  • Said widened base of the corner insert is arched into a semi-elliptical shape and is inserted, almost always manually, into the hollow of the gasket through the opening provided in the bottom of the gasket itself.
  • a hook which engages in a corresponding hole provided in the oven structure protrudes from the base of the metal insert, through said opening.
  • two metal end inserts are provided that are inserted through the ends of the gasket and are normally fixed with adhesive.
  • a gasket of this type is described for example in GB-A-2 106 974, which reflects the preamble of claim 1.
  • a first drawback is that the gasket can easily tear at the ends of the cut, especially at the time of insertion of the metal insert, and consequently an adhesive must be used to hold the hook in position and prevent the tear from extending during use of the gasket.
  • slots for insertion of the metal inserts with hooks are made in the hollow gasket strip by removing material.
  • Such a solution eliminates the problem of tearing of the gasket, but introduces other drawbacks, such as, for example, the greater complexity of the equipment that has to make the slot and, at the same time, remove the material enclosed by the outline of the slot, for example by vacuum means.
  • Another drawback of this solution is that, if an adhesive is not used to fix the insert and thus close the slot, material from outside such as grease and the like tends to accumulate there, stagnating in the gasket and soiling it.
  • the aim of the invention is to eliminate the aforementioned disadvantages and in particular to solve the problems of the solution described in GB-A-2 106 974, which provides for a straight cut in the gasket, without introducing further problems, such as those of the solution proposed in EP-A-277 098, for example.
  • Another aim of this invention is to provide a gasket of this type, in which said openings stay covered during use of the gasket, preventing oven materials from entering the gasket,
  • Yet another aim of the invention is to provide an opening that adapts well to the outline of the metal insert.
  • Yet another aim of the invention is to provide such a gasket, in which the metal inserts can be mounted with or without the use of an adhesive.
  • the opening made in the gasket to accommodate the metal insert consists of a cut with rounded ends, so as to prevent initiation of tearing.
  • the portion joining said rounded ends of the cut advantageously has a curved shape that follows the curved contour of the base of the corner inserts, that is of the inserts suitable to be placed at the corners of the oven door.
  • the gasket for cooking ovens comprises a continuous strip 1 made of an elastomer, in particular silicone rubber, and a plurality of metal elements 2, 2', 2", the function of which will be described below.
  • the continuous strip 1, obtained by extrusion, is of the tubular type and has a continuous inner cavity 3, defined on one side by a flat surface 4, at the longitudinal edges of which respective lips 5 are provided to improve the seal against the surface on which the gasket is applied.
  • a protruding longitudinal flap 7 is provided which, in the specific case, encloses a second continuous cavity 6.
  • the purpose of the flap 7 is to provide a tight seal against the complementary element of the oven where the gasket is interposed, in particular against the oven door.
  • the flap 7 can equally well be oriented so that it is directed either towards the insides of the frame, as illustrated in the appended figures, or towards the outside.
  • Figure 1 schematically shows a gasket 10 with four sides, forming a closed rectangular frame
  • Figure 2 schematically illustrates a gasket 100 with three sides, forming an open frame without the bottom side.
  • the aforementioned metal hooking elements 2, 2' are used to fix the gaskets to the corresponding wall of the oven, whilst the metal element 2", shown hatched in Figure 1, acts as a joining element to make the join at the ends of the closed-frame gasket 10, in Figure 1, being inserted axially into the tubular chamber 3 of the gasket at the ends thereof and being fixed there with a suitable adhesive.
  • the metal inserts 2' used in the three-sided gasket in Figure 2, are also inserted axially, from the ends of the gasket, into the tubular chamber 3 thereof, and fixed with suitable adhesive. These metal inserts 2' have a respective hook 21' at one end, lying along the longitudinal axis of the insert 2', for hooking into corresponding holes provided on the base of the oven.
  • the metal insert 2 has a flat base 20, with an arched profile, with a recess 22 in the centre of the concave inner profile, from which a hook 21 protrudes, designed to engage in a corresponding hole in the oven structure, like the hooks 21' of the end inserts 2'.
  • each opening 30, is made in the flat wall 4 defining said chamber.
  • Each opening 30, as can be seen more clearly in the plan view in Figure 3, consists of a continuous cut, advantageously made by die-cutting, comprising an intermediate portion 31, extending substantially in the longitudinal direction of the strip 1, and two terminal portions 32, with a rounded outline, advantageously shaped like the arc of a circle, for an extension greater than 180°, or at least 90°.
  • the intermediate portion 31 also has a curved shape, with a curvature that follows that of the base 20 of the metal insert 2, and with a concavity advantageously facing in the direction in which the strip 1 is bent to form the corner of the gasket, as shown, for example, in Figure 4.
  • This shaping of the opening 30 solves the problems described in the preamble of this description.
  • the rounded ends 32 of the cut facilitate insertion of the base 20 of the inserts 2, preventing tearing of the gasket during insertion, which requires a considerable elastic stretching of the material, since the opening 30 is smaller than the size of the insert 2.
  • Adhesive can also be optionally provided to fix the inserts 2 in the corresponding openings 30.
  • the cuts 30 made in the gasket can also be used for insertion of metal inserts with a straight instead of a curved base, for example of inserts to be placed at intermediate points, instead of at the corners, of the gaskets 10, 100.
  • Two of such intermediate inserts have been schematically illustrated in Figures 1 and 2, and with these the same advantages are achieved, as those described previously with reference to the corner inserts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)
  • Sealing Material Composition (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Cookers (AREA)

Claims (8)

  1. Un joint d'étanchéité réalisé en élastomère tout particulièrement pour des fours de cuisine, à interposer entre un bord frontal du four et une porte correspondante, ledit joint comprenant une bande continue (1), pourvue d'insertions métalliques (2, 2') ayant des crochets (21, 21') pouvant s'engager dans des trous réalisés dans la structure du four, lesdites insertions métalliques (2) étant introduites dans une cavité tubulaire (3) de ladite bande continue (1) par des ouvertures respectives (30) réalisées dans une paroi plate (4), définissante ladite cavité tubulaire (3) sur un côté, chacune desdites ouvertures (30) étant une entaille continue, caractérisé par le fait que ladite entaille continue comprend une partie intermédiaire (31) s'étendant substantiellement dans la direction longitudinale de la bande (1), et deux extrémités respectives (32) avec un profil courbe, s'étendant au-delà d'un angle de plus de 90°, et définit un rabat de matière (33) qui reste en place sur le joint et maintient ladite ouverture (30) fermée pendant l'utilisation.
  2. Un joint selon la revendication 1, caractérisé par le fait que lesdites extrémités (32) s'étendent au-delà d'un angle de plus de 180°.
  3. Un joint selon la revendication 1 ou 2, caractérisé par le fait que lesdites extrémités (32) avec un profil courbe forment les arcs d'un cercle.
  4. Un joint selon une revendication quelconque parmi les revendications susmentionnées, caractérisé par le fait que ladite partie intermédiaire (31) de l'ouverture (30) possède un profil en arc.
  5. Un joint selon la revendication 4, caractérisé par le fait que les concavités de ladite partie intermédiaire (31) de l'ouverture (30) avec un profil en arc sont tournées dans la direction dans laquelle la bande continue (1) est courbée pour former un joint (10, 100).
  6. Un joint selon une revendication quelconque parmi les revendications susmentionnées, caractérisé par le fait que lesdites insertions métalliques (2) possèdent une base (20) avec un profil courbe, et peuvent être placées aux coins dudit joint (10, 100).
  7. Un joint selon une revendication quelconque parmi les revendications allant de 1 à 5, caractérisé par le fait que lesdites insertions métalliques (2) possèdent une base étroite et peuvent être placées à des points intermédiaires le long des côtés du joint (10, 100).
  8. Un joint selon la revendication 1, où lesdites insertions métalliques (2') sont introduites par les deux extrémités de ladite bande continue (1) qui est courbée pour former un joint ouvert à trois côtés (100).
EP96120322A 1996-12-18 1996-12-18 Joint d'étanchéité en élastomère, en particulier pour porte de four de cuisson Expired - Lifetime EP0851177B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES96120322T ES2154380T3 (es) 1996-12-18 1996-12-18 Junta de estanquidad de elastomero adecuada en particular para puertas de hornos de cocina.
AT96120322T ATE198931T1 (de) 1996-12-18 1996-12-18 Dichtung aus elastomer, insbesondere für backofentür
DE69611683T DE69611683T2 (de) 1996-12-18 1996-12-18 Dichtung aus Elastomer, insbesondere für Backofentür
EP96120322A EP0851177B1 (fr) 1996-12-18 1996-12-18 Joint d'étanchéité en élastomère, en particulier pour porte de four de cuisson
PT96120322T PT851177E (pt) 1996-12-18 1996-12-18 Junta de vedacao de elastomero particularmente para portas de fornos de cozinha

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96120322A EP0851177B1 (fr) 1996-12-18 1996-12-18 Joint d'étanchéité en élastomère, en particulier pour porte de four de cuisson

Publications (2)

Publication Number Publication Date
EP0851177A1 EP0851177A1 (fr) 1998-07-01
EP0851177B1 true EP0851177B1 (fr) 2001-01-24

Family

ID=8223511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96120322A Expired - Lifetime EP0851177B1 (fr) 1996-12-18 1996-12-18 Joint d'étanchéité en élastomère, en particulier pour porte de four de cuisson

Country Status (5)

Country Link
EP (1) EP0851177B1 (fr)
AT (1) ATE198931T1 (fr)
DE (1) DE69611683T2 (fr)
ES (1) ES2154380T3 (fr)
PT (1) PT851177E (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2142715B1 (es) 1997-02-12 2000-11-16 Alberto Manero S A Junta en forma de marco de material elastomero, especialmente para puertas de hornos de cocina.
KR100595180B1 (ko) 2002-07-31 2006-07-03 엘지전자 주식회사 빨래건조기/드럼세탁기의 도어
DE102004032931A1 (de) * 2004-07-07 2006-02-02 BSH Bosch und Siemens Hausgeräte GmbH Backofen mit einer Backofentürdichtung
EP2837893B1 (fr) * 2013-08-14 2016-11-16 Electrolux Appliances Aktiebolag Four à vapeur avec un joint

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2106974B (en) 1981-10-06 1985-08-29 Silicone Altimex Ltd Door seal
GB2113827B (en) * 1982-01-23 1985-01-23 Silicone Fabrications Limited Stretch gaskets
EP0277098B1 (fr) 1987-01-21 1992-04-29 GIAT S.r.L. Joint de porte de four en élastomère ayant la forme d'un cadre fermé ou ouvert

Also Published As

Publication number Publication date
PT851177E (pt) 2001-07-31
DE69611683T2 (de) 2001-08-02
EP0851177A1 (fr) 1998-07-01
ES2154380T3 (es) 2001-04-01
DE69611683D1 (de) 2001-03-01
ATE198931T1 (de) 2001-02-15

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