ES2378803B1 - TOASTER. - Google Patents

Abstract

Toaster. # The invention relates to a toaster (1) consisting of: # - a thermally insulating chest (2), each (6, 7) of the side walls of said chest being constituted, by two transparent plates (61, 62, 71, 72), with a space (8) between two plates forming a wall; # - a mobile compartment (5) intended to receive a piece (4) of bread; # - at least one infrared ray element (20) heating element (20), # characterized in that at least one heating element is equipped with at least one means (22, 27) to prevent the diffusion of a part of the radiation towards the bread.

Description

Toaster

The present invention relates to an appliance of type 5 bread toaster.

This type of apparatus, widely extended, generally consists of a thermally insulating hood, which forms the body of the apparatus. This chest contains at least one heating element, for example one or more resistors attached to a source of electrical voltage. The chest also contains

10 a mobile compartment where a piece of toast is placed, said compartment being located close to the resistors. The resistors are heated for a given time, at the end of which the piece of toast is ejected from the apparatus.

It is especially customary to include resistors in 15 quartz tubes, in order to prevent the user from coming into contact with a bare conductor.

The degree of toast of the bread is chosen by the user, classically by means of a cursor or an adjustment wheel, before the introduction of the bread into the apparatus. However, said cursor or said adjustment wheel

20 is generally attached to a means of determining the roasting time. This time, often approximate, does not correspond to a precise quality of bread toasting. Indeed, for the same roasting time, the result obtained in visual and gustatory terms varies depending on the nature of the bread introduced. Variation factors are especially the

25 thickness of the slice of bread and its degree of moisture. It is therefore useful to be able to visually monitor the evolution of the toast of the bread in the oven and a measure of its progress, in order to interrupt the roasting when it has reached the level desired by the user. A solution to this problem is provided by the invention described in the

30 FR 2 799 632 patent, in the name of the applicant. This invention relates to a toaster in which the side walls of the chest are transparent. Thus, the slices of bread introduced into the apparatus are visible during roasting, which can be interrupted at the desired time. According to a variant of the invention described in the FR patent

35 2 799 632, the heating elements are arranged in the upper and lower parts of the chest, in order to free the middle part of said chest. In this way, the heating elements are poorly visible to the user. Therefore the user can control the degree of roasting of a piece of bread without his field of vision being hindered by the presence of a heating element.

A drawback of placing the heating elements outside the middle part of the chest is linked to the quality of toasting of the bread. Indeed, a slice of bread introduced in such an apparatus is roasted more in the vicinity of the heating elements, that is in the upper and lower part, than in the middle part. Therefore, a little homogeneous roasting is obtained, which is not satisfactory for the consumer.

A known solution, described in FR 2 799 632 is to include the heating elements in reflector compartments. These reflector compartments have a generally curved shape, suitable to reflect a part of the infrared rays of the resistors towards the slices of bread, especially towards their middle part. These reflector compartments therefore allow to homogenize the toasting of the bread in the case where the heating elements are placed in the upper and lower part of the chest.

However, it happens that the result obtained is not sufficiently homogeneous for the taste of the consumer. There is therefore a need to regulate the degree of roasting depending on the area of the slice of bread.

Another drawback coupled with the position of the heating elements refers to the fall of bread crumbs at the bottom of the apparatus. Indeed, during the introduction or expulsion of the bread, crumbs can fall on the heating elements and, where appropriate, on the reflectors. The heating elements involved are mainly those found in the lower part of the chest.

Due to their specially curved shape, the reflectors that receive the bread crumbs retain these crumbs in the proximity, even in contact with the heating elements. Throughout the roasting, these crumbs reach a very high temperature. Smoke is calcined and emitted which causes discomfort to the consumer and a risk of starting a fire.

In addition, this calcination leaves unsightly traces on the heating elements and on the reflectors. In the case where the chest is transparent, the inside of the device is visible to the user. It is therefore preferable to avoid the appearance of such calcination traces on the reflectors.

The present invention allows solving these various problems. The invention relates to a bread toaster consisting of a thermally insulating chest, a mobile compartment intended to receive a piece of bread, at least one infrared heating element; said bread toaster being characterized in that at least one heating element is equipped with at least one means to prevent the diffusion of a part of the radiation towards the bread.

According to one form of the invention, at least one infrared heating element consists of a reflector compartment, said reflector compartment allowing to reflect a part of the radiation towards the bread to be roasted, and a part of the surface of said reflector compartment is equipped with means to prevent the reflection of radiation towards the bread. According to this form of the invention, the diffusion of radiation to the bread by reflection is partially impeded.

The means to prevent the reflection of the radiation can be constituted by a non-reflective material, applied on a part of the surface of the reflector. This material can be especially varnish or paint type. These means may also consist of another treatment of the surface of the reflector, such as a firing or a local deformation.

According to a preferred embodiment of the invention, the means for preventing the reflection of the rays are transverse holes, which are located on the surface of the reflector.

According to another form of the invention, at least one infrared heating element consists of a wall arranged between the heating element and the mobile compartment. Said wall absorbs a part of the radiation diffused in the direction of the bread. Thus, the direct diffusion of radiation to the bread is partially prevented.

According to a preferred embodiment of the invention, the wall comprises a surface that has at least one gradient of absorbance of infrared rays. Thus, depending on the area of the wall considered, the absorbance is different. The intensity of the infrared rays diffused towards the bread is therefore modulated according to the area of the piece to be roasted.

An absorbance gradient of this type can be made by a variable wall thickness. The wall can also be composed of several materials that have different absorbances.

According to a preferred embodiment of the invention, the wall is made of a transparent or translucent material in visible light. A wall of mica can be used especially. According to another embodiment, the wall is made of an opaque material in visible light, such as PTFE (polytetrafluoroethylene).

According to an embodiment of the invention, the wall has a

or more continuous surfaces. In order not to lengthen the time necessary to toast the bread too much, it is preferable to use a wall consisting of a material that allows a sufficient part of the infrared rays to pass through.

According to another embodiment of the invention, said wall consists of one or more perforations, in order to modulate the intensity of the infrared rays received by this or that part of the piece of bread to be roasted.

According to a preferred embodiment of the invention, said wall is a grid. A grid of this type is formed, for example, of metallic threads. The arrangement of said threads allows modulating the intensity of the infrared rays received by this or that part of the piece of bread to be roasted.

In addition to its function of regulating the infrared rays diffused towards the bread, such a wall allows to prevent the bread crumbs from coming into contact with the heating element. In the presence of a reflector that is part of the heating element, this wall can also prevent bread crumbs from accumulating on the reflector, in proximity or in contact with the heating element. This crumb protection function refers in particular to the heating elements found in the lower part of the toaster.

It is customary to equip with such walls the heating elements of the gratin ovens. However, these walls also have a function of mechanical protection against shocks, during the introduction of hard objects, such as plates, inside the oven. These walls also have the function of protecting the user from eventual electrical contact in case of a rupture of the heating element.

This function has no reason to be in a toaster. Indeed, the latter is not intended for the introduction of hard objects, nor by the user's hand.

The invention has a particular interest in bread toasters in which the heating elements are placed in the upper and lower part of the apparatus, especially when the walls of said bread toaster are transparent.

However, the invention is capable of being applied to all types of toasters, whatever the position of the heating elements. In a general way, the invention allows to regulate the radiation of the heating elements towards a certain part of the bread to be roasted. Such an invention makes it possible in particular to adopt an asymmetrical arrangement of the heating elements, for example by regrouping them in the upper part of the apparatus, totally ensuring a homogeneous roasting of a slice of bread.

The invention will be better understood by reading the description that follows and by examining the accompanying figures. These are presented by way of indication and in no way limiting the invention.

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Figure 1: cross-sectional view of a toaster according to the latest advances;

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Figure 2: gentleman perspective of a heating element and a reflector according to an embodiment of the invention;

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Figure 3: gentleman perspective of a heating element and a reflector according to another embodiment of the invention.

Figure 1 represents a cross-sectional view of a toaster according to the latest advances. More precisely, Figure 1 depicts a toaster with transparent walls. Such a toaster is especially described in patent FR 2 799 632, in the name of the applicant.

The toaster 1 consists of a chest 2, substantially parallelepipedic. Said chest has, in its upper part, a groove 3 through which one or several slices 4 of bread can be introduced. A slice 4 of bread introduced into the toaster 1 rests in a compartment 5, movable in vertical translation. Such a mobile compartment 5 is used conventionally in most of the known toasters. In Figure 1, compartment 5 is shown in the low position. The compartment 5 is especially in this low position when the heating elements (9,10) of the bread toaster 1 are operating. When the expulsion of the bread takes place, the compartment 5 adopts a higher position.

The mobile compartment 5 is constituted, for example, of metal wires separated from each other, in order not to be an obstacle to the toasting of the bread. Preferably, the mobile compartment 5 consists of vertical threads arranged side by side. More preferably, two adjacent threads are separated by a maximum of 19 mm.

The compartment 5 is in the middle position of the chest, with respect to the side walls (6, 7). In the example presented in Figure 1, the walls (6,7) are transparent. More precisely, the walls (6,7) are transparent to visible light. Each of these walls consists of two transparent plates (61, 62; 71, 72), for example glass plates. A space 8, which is between the two plates that form a wall, forms a thermal insulation between the inside and the outside of the chest 2. Preferably, two transparent plates (61, 62) forming a wall are separated at least 2 mm

According to the embodiment shown in Figure 1, the walls (6, 7) are fixedly mounted on the chest 2. According to another embodiment of the invention, at least one wall 6 or 7 is mobile in rotation with respect to the chest 2, for example along an axis perpendicular to the cutting plane of Figure 1. Said mobile wall then forms a door that allows easy access to the inside of the chest, for example for cleaning operations.

According to another embodiment of the invention at least one wall 6

or 7 is removably mounted with respect to the chest 2. More particularly, at least one wall 6 or 7 is fixed to the chest 2 by means of reversible assembly, for example tweezers.

Preferably, in the case where a wall (6, 7) is mobile in rotation or removable with respect to the chest 2, the toaster 1 is equipped with a safety system. This system cuts the power supply of the toaster when at least one of the walls (6, 7) is not in the closed position.

On each side of the mobile compartment 5 are arranged the heating elements 20, which consist, for example, of heating resistors (9,10). More precisely, each side of the mobile compartment 5 consists of two heating resistors (9,10). Advantageously, the resistors (9,10) are included in quartz tubes 11, which improve infrared emission.

In order not to enter a user's field of vision, the resistors 9 are located at the top of the chest 2, while the resistors 10 are located at the bottom of the chest 2. Thus, an observer located at the height from the transparent walls (6,7) you have an unobstructed view of the slices 4 of bread. Thus, the degree of roasting of said slices can be optimally evaluated 4.

The placement of the resistances (9,10) in the upper and lower part of the chest tends to generate a more important degree of roasting in the upper and lower parts of the slice 4 of bread than in the middle part 12 of said slice. In order to standardize the amount of infrared received over the entire surface of the bread, a reflector 13 is provided around each quartz tube 11, which guides the infrared rays 50 in the direction of the bread, especially of the middle part 12 of the slice 4.

However, a part of the reflector 13, especially in the vicinity of an edge 14 closest to the mobile compartment 5, also reflects the infrared rays in the direction of the upper or lower part of the slice 4.

In order to standardize the amount of infrared rays received on the whole of the surface of the slice 4, it is therefore advantageous to prevent the diffusion to the bread 4 of a part of the radiation 50 emitted by the resistors (9,10). For example, it is advantageous to equip a part of a surface of the media reflector 13 to prevent the reflection of radiation 50 towards the bread. In the example presented in Figure 1, it is advantageous that said means are in the vicinity of the edge 14 closest to the mobile compartment 5, in order to decrease the amount of infrared reflected towards the upper and lower parts of the slice 4 .

A solution to this problem is given by the invention, of which one embodiment is represented in Figure 2. More precisely, Figure 2 represents a gentleman perspective of a heating element 20, which is part of a toaster according to A form of the invention.

According to the example shown in Figure 2, the heating element 20 consists of a heating resistor 10, inserted in a quartz tube 11. According to another embodiment of the invention, a heating element 20 can be a resistor arranged around a ceramic cylinder, or also an armored tubular resistor.

The tube 11 is surrounded by a reflector 13, on a sector of approximately 200 °. When the element 20 is installed in a toaster 1, a part 21 of the reflector 13 reflects the infrared rays in the direction of the mobile compartment 5. This substantially flat part 21 is located in the vicinity of an edge 14 of the reflector 13.

According to the invention, the part 21 of the reflector 13 is equipped with transverse holes 22, which prevent the reflection of a part of the infrared rays of the resistor 10 towards the compartment 5.

In the example depicted in Figure 2, the holes 22 are arranged in a substantially regular manner along a main axis 23 of the heating element 20. It is also possible to arrange these holes irregularly. For example, the holes in the vicinity of the center of the edge 14 can be advantageously separated, rather than in the vicinity of the ends (40, 41) of said edge 14. Thicker holes can also be made in the vicinity of the ends (40 , 41) than in the vicinity of said center. This allows a more important reflection of the radiation 50 towards the center of the slice 4 than towards the lateral edges of said slice. The roasting of a central part of the slice 4 is favored with respect to the roasting of the edges, which are generally drier in origin.

In the example shown in Figure 2, the holes 22 are arranged substantially evenly on the shafts (24, 25) substantially parallel to the main axis 23 of the heating element 20. Preferably, the holes 22 are arranged on at least two axes (24, 25). It is possible to modulate the amount of radiation reflected by forming holes of different size on axis 24 and on axis 25.

Advantageously, in order to homogenize the reflection of the infrared, the holes located on the axis 24 are arranged to the pin with respect to the holes located on the adjacent axis 25.

According to an embodiment of the invention, the holes 22 located on the same axis 24 or 25 are of similar size and shape, so as to favor homogeneous radiation over the length 26 of the reflector 13.

As indicated above, it is also possible to make holes of varying size and / or shapes along the axis 23, in order to generate a variable radiation on the length 26 of the reflector 13.

According to a variant of the invention, it is possible to replace the holes 22 with brush strokes of a non-reflective material, such as paint or varnish. It is also possible to replace the holes 22 with specially treated surface areas, for example areas without polishing.

Apart from the effect of radiation regulation, the presence of holes 22 or brush strokes of paint on the reflectors also has an aesthetic effect. Presenting a "mosaic" aspect in view of the user, it diverts its attention from possible traces of calcination. These traces would be much more visible on a reflector that had a united surface. This effect is especially noticeable in the case of a toaster that has transparent walls (6,7).

For the elements 20 intended to be installed in the lower part of a bread toaster chest 2, the presence of holes 22 also allows the bread crumbs to pass before they fall into the reflector 13. This prevents these crumbs from being calcined. in contact with quartz tubes 11. However, only crumbs whose dimensions are smaller than those of holes 22 are likely to pass through said holes 22.

Figure 3 represents a gentleman perspective of a heating element 20 according to another form of the invention. This element 20 is similar to that shown on Figure 2.

In the example shown in Figure 3, the heating element 20 is equipped with a grid 27, arranged between the tube 11 and the mobile compartment 5. This grid 27 is essentially constituted of threads 28 that develop in planes perpendicular to the main axis 23 of the element 20. Each of the ends (29, 30) of each thread 28 is in contact with a part of the reflector 13, or close to said reflector 13.

The wires 28 are fixedly attached to at least one wire 31, substantially parallel to the axis 23, which ensures the cohesion of the grid 27.

The wires 28 are curved and surround the tube 11 over a sector of approximately 160 °. Thus, in a plane perpendicular to the axis 23, the tube 11 of the element 20 is entirely surrounded by the grid assembly 27 / reflector 13.

The section, number and arrangement of the wires 28 allow modulating the intensity of the infrared rays diffused towards the bread by the resistance 10, in a direction parallel to the axis 23. Likewise, the section, the number and the arrangement of the wires 31 allow to modulate the intensity of the infrared rays diffused towards the bread, in a direction perpendicular to the axis 23.

The threads (28, 31) can also have a variable section on their length.

Preferably, the threads (28, 31) are made of metal. They can also be made of another material, which has, for example, a higher absorbance of infrared rays.

In addition to its radiation regulation effect, the grid 27 allows to avoid the fall of thick bread crumbs on the tube 11 and in the reflector 13, as well as the carbonization of these crumbs in contact with the tube 11. More precisely, the bread crumbs in which at least one dimension is greater than a space 32 between two threads 28 can slide over said threads and fall to the bottom of the chest 2.

The crumbs whose dimensions are smaller than the space 32 between two wires 28 pass between said wires and fall on the tube 11 or on the reflector 13. A part of these crumbs can then pass through the holes 22 and fall to the bottom of the chest 2.

There are, however, crumbs of an intermediate size, small enough to pass through the grid 27 but too large to pass through the holes 22.

In order to remedy this problem, it is possible to replace the grid 27 with a wall, especially not perforated, constituted by a material that allows at least a part of the infrared rays emitted by the resistance of the element 20. Mica or PTFE wall. Such a wall may have a curved shape, similar to the shape of the grid 27.

Claims (2)

1 - A toaster (1) consisting of:

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a thermally insulating chest (2), each (6, 7) of the side walls of said chest being constituted, by two transparent plates (61, 62, 71, 72), with a space (8) between two plates that form a wall;

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a mobile compartment (5) intended to receive a piece (4) of bread;

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at least one element (20) ray heater (50) infra

red, characterized in that at least one heating element is equipped with at least one means (22, 27) to prevent the diffusion of a part of the radiation towards the bread. 2 - The bread toaster according to claim 1, characterized in that at least one infrared heater element (20) consists of a reflector compartment (13), said reflector compartment allowing to reflect a part of the radiation towards the bread to be roasted, being a part (21) of the surface of said reflector compartment (13) equipped with means (22) to prevent the reflection of radiation towards the bread. The bread toaster according to claim 2, characterized in that the means for preventing the reflection of radiation are transverse holes (22), which are located on the surface of the reflector. 4 - The bread toaster according to claim 2, characterized in that the means for preventing the reflection of radiation are constituted by a non-reflective material, applied on a part (21) of the reflector surface. The bread toaster according to one of the preceding claims, characterized in that at least one heating element is equipped with a wall (27) disposed between the heating element and the mobile compartment. The bread toaster according to claim 5, characterized in that the wall of the heating element consists of a surface that has at least a gradient of absorbance of the infrared rays. 7 - The bread toaster according to claim 5 or claim 6, characterized in that the wall of the heating element is made of a transparent or translucent material in visible light. 8 - The bread toaster according to one of claims 5 to 7, characterized in that the wall of the heating element consists of one or more perforations. The bread toaster according to one of claims 5 to 8, characterized in that the wall of the heating element is a grid (27). The bread toaster according to one of the preceding claims, characterized in that a heating element (20) consists of a resistor (10) included in a quartz tube (11). The bread toaster according to one of the preceding claims, characterized in that two transparent plates (61, 62) forming a side wall of the chest are separated by at least 2 mm. 12 - The bread toaster according to one of the preceding claims, characterized in that at least one side wall (6, 7) is mobile in rotation about an axis, with respect to the chest (2). The bread toaster according to one of the preceding claims, characterized in that at least one side wall (6, 7) is removably mounted on the chest (2). 14 - The bread toaster according to one of claims 12 and 13, characterized in that the heating elements are supplied with energy only if the two side walls (6, 7) are in the closed position. 15 - The bread toaster according to one of the preceding claims, characterized in that at least one heating element (20) is a resistor arranged around a ceramic cylinder. 16 - The bread toaster according to one of the preceding claims, characterized in that at least one heating element (20) is an armored tubular resistor. The bread toaster according to one of the preceding claims, characterized in that the mobile compartment (5) consists of vertical threads arranged side by side, two adjacent threads being separated at most 19 mm. SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 201030220 SPAIN Date of submission of the application: 02.17.2010 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: A47J37 / 08 (2006.01) RELEVANT DOCUMENTS

Category

56 Documents cited Claims Affected

X

GB 1270859 A (EBERHARD PASSLER K G) 19.04.1972, 1.5-7.8-11.15-17

description; Figures 1-8.

Y

2-4,12-14

Y

US 2368026 A (IVAR JEPSON) 23.01.1945, 2-4

description; Figures 1-8.

Y

US 7105778 B1 (DELONG DERWOOD S et al.) 12.09.2006, 12-14

description; Figures 1-10.

TO

FR 2799632 A1 (HAMEUR SA) 20.04.2001, 1-17

description; figures 1-2.

TO

US 6337466 B1 (CHASEN JAMES E) 08.01.2002, 12-14

description; Figures 1-4.

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 30.03.2012

Examiner J. C. Moreno Rodriguez Page 1/5

REPORT OF THE STATE OF THE TECHNIQUE Application number: 201030220 Minimum documentation searched (classification system followed by classification symbols) A47J Electronic databases consulted during the search (name of the database and, if possible, terms of search used) INVENES, EPODOC, WPI State of the Art Report Page 2/5  WRITTEN OPINION Application number: 201030220 Date of Written Opinion: 30.03.2012 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims 1-17 Claims IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 1-17 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/5  WRITTEN OPINION Application number: 201030220 1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

GB 1270859 A (EBERHARD PASSLER K G) 04/19/1972

D02

US 2368026 A (IVAR JEPSON) 23.01.1945

D03

US 7105778 B1 (DELONG DERWOOD S et al.) 12.09.2006

D04

FR 2799632 A1 (HAMEUR SA) 04.20.2001

D05

US 6337466 B1 (CHASEN JAMES E) 08.01.2002

2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement The object of the invention is a bread toaster consisting of a thermally insulating chest, each side wall of said chest being constituted by two transparent plates, with a space between the two plates forming the wall, a mobile compartment intended to receive a piece of bread and at least one infrared heating element, which is equipped with at least one means to prevent the diffusion of a part of the radiation towards the bread. Document D01 discloses a bread toaster consisting of a thermally insulating chest (1) and disposes in each of the side walls of said chest a window (3) of transparent material, a mobile compartment (5) intended to receive a piece of bread and at least two heating elements (2) by infrared rays, these equipped with heat reflectors (7,8) that prevent the diffusion of at least part of the radiation to the bread. The application of the two transparent plates with a space between them on each side wall, has the associated technical effect of allowing the view of the bread being roasted, while minimizing the diffusion of heat to the outside of the toaster. But this same effect can be achieved by applying simple windows of a single transparent plate of sufficient thickness and a thermally insulating material. In addition, said technical element consisting of two transparent plates, with a space between the two plates applied for these purposes, is already disclosed in the prior art, as can be seen in document D02. The heat reflectors (7 and 8) act as a wall between the heating elements (2) and the mobile compartment (5), these reflectors presenting perforations or grid arrangement. The use of transparent or translucent walls or that have absorbance gradients of infrared rays on their surface, in order to allow the controlled passage of part of the radiation emitted by the heating element towards the bread, are only technical options to the realization of perforations or grid arrangement on the wall, these options being found already in the state of the art, as can be seen in this case in document D02 (elements 62 and 63). The heating elements (2) are resistors arranged around a ceramic cylinder. The application of armored tubular resistors for this same purpose is widely disseminated in the state of the art, as well as the resistances introduced in a quartz tube, as can be seen in document D04. The mobile compartment (5) is presented in the form of a basket consisting of rods (description and figures 1-8). In view of this document D01, claims 1.5-7, 8-11 and 15-17 lack inventive activity. The difference of the object of the invention set forth in claims 2-4 against the bread toaster disclosed in document D01, is that in document D01, the reflectors (7,8) act as a protection against excess radiation received by the bread, being the reflection of said radiation on the inner walls of the chest (1) that affects the bread, while in claims 2-4 some reflectors are reflected that reflect radiation towards the bread, minimizing this by means of a series of technical options. The technical effect associated with this difference is that the presence of the reflectors thus treated is sufficient to regulate the amount of radiation incident in the bread to be roasted. However, this difference as well as the associated technical effect are found in document D02. In this document a bread toaster is disclosed in which the heating elements (46 and 47) consist of reflecting compartments (32 and 33) that reflect the radiation towards the bread to be roasted, a part of the surface of said compartment being (section B) treated to minimize the radiation emitted to a specific area of the bread. This treatment can be either by folding (hammering) or by treating with a non-reflective material a part of the surface of the reflector (description and figures 1-8). The application of transverse holes in said surface to minimize its reflection capacity is widely disclosed in the prior art, as can be seen in D05. State of the Art Report Page 4/5  WRITTEN OPINION Application number: 201030220 For a person skilled in the art it would be obvious that the combination of documents D01 and D02 would be obvious, in view of this combination that claims 2-4 lack inventive activity. The difference between the object of the invention disclosed in claims 12-14 against the toaster disclosed in document D01 is the possibility of moving the side walls that make up the chest of the toaster, being able to do so safely. The technical effect associated with this difference is the possibility of accessing the inside of the toaster from the sides of it. However, this difference, as well as the associated technical effect, can be found in document D03, in which a toaster is disclosed that has a side door (20) that rotates in rotation around an axis with respect to the chest (description and figures 1-10). This toaster has an electronic system that controls the contribution of electric current to the heating elements that act as heating elements, only during the operation of the toaster. The control in various appliances in that the opening of doors or access to the interior of the same is not possible during the operation of this, is widely extended in the state of the art, being lacking inventive activity. For a person skilled in the art, the combination of documents D01 and D03 is evident, in view of this combination that claims 12-14 lack inventive activity. State of the Art Report Page 5/5