阅读说明：本技术 烘焙装置和具有该烘焙装置的生产系统 (Baking device and production system with same ) 是由 菲利普·里芬哈勒 于 2020-04-09 设计创作，主要内容包括：本发明涉及一种用于生产至少一个特别是连续的烘焙带(1)的生产系统和烘焙装置,其包括在机架(2)中或机架(2)上周向延伸的环(3),还包括在至少一个表面上的连续的烘焙表面(4)；加热组件(5),其具有用于感应加热环(3)的至少一个感应器(6)并且具有支撑架(7)；烘焙物质施加装置(8),其用于将优选地为液体的烘焙物质连续地施加到烘焙表面(4)；带移除装置(9),其用于连续地移除在加热的烘焙表面(4)上烘烤的带(1)；以及用于将加热组件(5)保持在加热区域中的保持装置(11),加热组件(5)经由至少一个可旋转地安装的辊(10)支撑在环(3)上。(The invention relates to a production system and a baking device for producing at least one, in particular continuous baking belt (1), comprising a ring (3) extending circumferentially in or on a frame (2), and further comprising a continuous baking surface (4) on at least one surface; a heating assembly (5) having at least one inductor (6) for induction heating the ring (3) and having a support frame (7); a baking substance application device (8) for continuously applying a baking substance, preferably a liquid, to the baking surface (4); a belt removal device (9) for continuously removing the belt (1) baked on the heated baking surface (4); and a holding device (11) for holding the heating assembly (5) in the heating region, the heating assembly (5) being supported on the ring (3) via at least one rotatably mounted roller (10).)

1. Baking apparatus for producing at least one, in particular continuous baking belt (1), comprising:

-a ring (3), said ring (3) rotating in or on the frame (2) and comprising on at least one surface a continuous baking surface (4),

-a heating assembly (5), the heating assembly (5) having at least one inductor (6) for inductively heating the loop (3) and a support frame (7),

a baking substance application device (8), said baking substance application device (8) being for continuously applying a preferably liquid baking substance to said baking surface (4),

-a belt removal device (9), said belt removal device (9) being intended to continuously remove the belt (1) baked on the heated baking surface (4), and

-a holding device (11), the holding device (11) being for holding the heating assembly (5) in a heating area,

characterized in that the heating assembly (5) is supported on the ring (3) via at least one rotatably mounted roller (10).

2. Baking apparatus according to claim 1, wherein the at least one roller (10) rolls on the surface of the ring (3), in particular on the inner circumferential surface (12) or the outer circumferential surface (13) of the ring (3), in order to constantly maintain the distance between the inductor (6) and the ring (3).

3. Baking apparatus according to claim 1 or 2,

-a plurality of rollers (10), in particular four rollers (10), are arranged on the supporting frame (7) of the heating assembly (5),

and the rollers (10) form, together with the heating assembly (5), a cradle that rolls on the surface of the rotating ring (3).

4. Baking apparatus according to any of the preceding claims,

-the heating assembly (5) is held in a stationary/fixed heating zone relative to the machine by holding means (11),

-wherein the holding means (11) allow a movement of the heating assembly in a radial direction of the ring (3) relative to the frame (2).

5. Baking apparatus according to any of the preceding claims, characterized in that a plurality of inductors (6) are arranged on the support frame (7) of the heating assembly (5).

6. Baking apparatus according to any of the preceding claims,

-maintaining a gap (14) between the at least one inductor (6) and the ring (3),

-and an adjustment assembly (15) is provided, said adjustment assembly (15) being used for selecting and setting the gap distance (16) and in particular the shape of the gap (14).

7. Baking apparatus according to claim 6,

-the adjustment assembly (15) comprises a roller adjustment mechanism (17), the roller adjustment mechanism (17) being adapted to set in a definable manner the position of the roller (10), in particular of the roller axis (18), relative to the heating assembly (5), in particular relative to the support frame (7),

-and/or the adjustment assembly (15) comprises an inductor adjustment mechanism (19), the inductor adjustment mechanism (19) being adapted to set the position of the inductor (6) relative to the support frame (7) in a definable manner,

-and/or the adjustment assembly (15) comprises an inductor adjustment mechanism (19), the inductor adjustment mechanism (19) being adapted to individually set the position of the plurality of inductors (6) relative to the support frame (7) in a definable manner.

8. Baking apparatus according to any of the preceding claims, characterized in that the ring (3) or at least a part of the ring (3) is configured as or serves as a susceptor for induction heating.

9. Baking apparatus according to any of the preceding claims,

-a holding roller (20) is arranged on the frame (2) in a rotatably mounted manner, the ring (3) being supported on the holding roller (20),

-and provided with a drive (21) for rotating the ring (3) about its axis of rotation.

10. Baking apparatus according to any of the preceding claims, characterized in that the ring (3) is mounted in a floating manner in the frame (2).

11. Baking apparatus according to any of the preceding claims,

-the heating assembly, in particular the at least one roller (10), is supported on the surface of the ring (3),

and the baking surface (4) is arranged on the opposite surface of the ring (3),

-and in particular, the heating assembly is arranged on an inner circumferential surface (12) of the ring (3) and the baking surface (4) is arranged on an outer circumferential surface (13) of the ring (3).

12. Baking apparatus according to any of the preceding claims, wherein the at least one roller (10) comprises a flange (24) for guiding the heating assembly (5) laterally with respect to the ring (3).

13. Baking apparatus according to any of the preceding claims,

-one roller (10) is arranged on each side of the heating assembly,

-the two rollers (10) each comprise one flange (24), and the two flanges (24) protrude beyond or surround the ring (3) on both sides, so as to laterally center the heating assembly (5).

14. A production plant for producing rolled waffles, in particular an annular baking machine, comprising:

baking apparatus according to any of the preceding claims,

-a winding device (22), said winding device (22) being intended to continuously form obliquely wound waffle rolls, and

-optionally, cutting means (23), said cutting means (23) being intended to form a single wafer roll by cutting said wafer roll into a plurality of pieces.

Technical Field

The present invention relates to a baking apparatus and a production plant according to the preambles of the independent claims.

The invention relates in particular to a device for producing at least one continuous baking belt which is optionally wound in a hot, plastically deformable state to form a wafer roll. Such products are known, for example, as wafer rolls or wafer sticks.

Background

Apparatuses for the continuous production of such products are known and disclosed in different embodiments.

In particular, baking devices are known which have a heated, continuously rotating ring, to the outer peripheral surface of which a liquid paste is applied in a first zone. For example, the torrefying ring is heated by a gas burner, so that the applied torrefying substance is torrefied for a certain torrefying time. By continuously applying the baking substance onto the rotating baking ring, an endless baking belt is formed, which is continuously removed in the second area by the removal device and then preferably wound and cut into pieces.

In order to increase the efficiency of such devices, it is known to design the heating as induction heating. However, it has been shown in practice that there is a certain difference in the quality of the produced baked product when using induction heating.

Disclosure of Invention

It is now an object of the present invention to improve a conventional baking apparatus of this type such that a consistently high product quality is obtained when using induction heating.

The object according to the invention is solved in particular by the features of the independent claims.

Surprisingly, it was found that the heating of the ring by induction heating is not uniform despite reasonable manufacturing tolerances.

An exemplary ring of the roasting apparatus according to the invention has a diameter of 1.5 to 3m, preferably about 2 to 2.5 m. The thickness of the ring is, for example, 2 to 10cm, preferably 5 to 6 cm. The width of the ring is for example 30 to 50 cm.

In practice, it has been found that such a ring is not exactly circular due to the manufacturing process, in particular also due to the subsequent heating in the baking apparatus. Furthermore, the heating of the loop by the inductor with constant power strongly depends on the distance between the inductor and the loop.

In order to meet these requirements, the invention proposes that the heating assembly is supported on the ring by means of at least one rotatably mounted roller. Furthermore, the heating assembly is movably arranged with respect to the frame, whereby the position of the heating assembly may follow the course of the loop during the rotational movement of the loop. As a result, the product quality can be remarkably improved.

In particular, the invention relates to a baking apparatus for producing at least one, in particular a continuous baking belt, comprising:

a ring rotating in or on the frame and comprising a continuous baking surface on at least one surface,

a heating assembly having at least one inductor for an induction heating loop and a support frame,

a baking substance application device for continuously applying a baking substance, preferably a liquid, to a baking surface,

a belt removal device for continuously removing the belt baked on the heated baking surface, an

-a holding device for holding the heating assembly in the heating area.

The invention contemplates that the heating assembly is supported on the ring by at least one rotatably mounted roller.

It is optionally contemplated that at least one roller rolls on the surface of the ring, in particular on the inner or outer circumferential surface of the ring, to constantly maintain the spacing between the inductor and the ring.

It is alternatively conceivable to provide a plurality of rollers, in particular four rollers, on the support frame of the heating assembly, and wherein the rollers form carriers with the heating assembly, which roll on the surface of the rotating ring.

It is optionally contemplated that the heating assembly is held in a stationary heating zone relative to the machine by a holding device, wherein the holding device allows the heating assembly to move relative to the machine in a radial direction of the ring.

It is optionally contemplated that a plurality of inductors are disposed on the support frame of the heating assembly.

It is optionally contemplated that a gap is maintained between the at least one inductor and the ring, and that an adjustment assembly is provided for selecting and setting the gap distance and in particular the shape of the gap.

It is optionally contemplated that the adjustment assembly comprises a roller adjustment mechanism for setting the position of the roller, in particular the axis of the roller, relative to the heating assembly, in particular relative to the support frame, in a definable manner.

It is optionally contemplated that the adjustment assembly includes an inductor adjustment mechanism for setting the position of the inductor relative to the support frame in a definable manner.

It is optionally contemplated that the adjustment assembly includes an inductor adjustment mechanism for individually setting the position of the plurality of inductors relative to the support frame in a definable manner.

It is optionally contemplated that the ring or at least a portion of the ring is configured or used as a susceptor for induction heating.

It is alternatively conceivable that the holding roller is arranged on the frame in a rotatably mounted manner, that the ring is supported on the holding roller, and that a drive is provided for rotating the ring about its axis of rotation.

It is alternatively contemplated that the ring is mounted in the frame in a floating manner.

It is optionally contemplated that the heating assembly, in particular the at least one roller, is supported on a surface of the ring and the baking surface is arranged on an opposite surface of the ring, and in particular that the heating assembly is arranged on an inner circumferential surface of the ring and the baking surface is arranged on an outer circumferential surface of the ring.

It is optionally contemplated that at least one of the rollers includes a flange for guiding the heating assembly laterally relative to the ring.

It is alternatively conceivable that one roller is provided on each side of the heating assembly and that both rollers have one flange each and that both flanges project beyond or surround the ring on both sides in order to center the heating assembly laterally.

Optionally, the present invention relates to a production plant for producing rolled wafers, in particular a ring baking machine, comprising a baking device according to the present invention, winding means for continuously forming obliquely wound wafer rolls, and optionally cutting means for forming individual wafer rolls by cutting said wafer rolls into a plurality of pieces.

The heating assembly is supported on the ring by at least one rotatably mounted roller, wherein in particular the at least one roller rolls on the surface of the ring.

Preferably, the plurality of rollers are rotatably mounted on a support frame of the heating assembly such that the rollers together with the heating assembly form a carriage that travels along the surface of the moving loop.

Preferably, the heating assembly and/or the carriage are held in the heating area relative to the frame, wherein the holding means hold. The holding device is preferably designed such that a certain mobility of the heating assembly with respect to the chassis is possible.

In particular, the heating assembly may be moved in the radial direction of the ring, however, this also includes the following cases: the movement may comprise a further movement component such that optionally also a movement substantially inclined to the radial direction is comprised. Importantly, the heating assembly can be made to travel along the path of the loop.

Preferably, the retaining means locks the movement relative to the chassis along the ring but allows movement relative to the chassis and substantially radially of the ring. Thus, the ring may be moved along the heating assembly, wherein the heating assembly is held in the heating area. However, it is possible to have the heating assembly travel along the path of the rotating ring-in particular in a radial direction.

Between the heating assembly or the inductor of the heating assembly and the ring, a gap with a gap distance is maintained, which gap is configured in particular as an air gap. In order to be able to adjust the gap precisely, an adjustment assembly is provided. Preferably, the adjustment assembly is designed such that the gap can be set and defined accurately.

The set gap distance is then kept constant by supporting the rollers on the ring. Thus, no continuous change of the adjustment assembly is required. Therefore, preferably, the adjustment assembly is operated/checked when it is first used. However, the adjustment assembly preferably remains unchanged during the baking operation.

The adjustment assembly may comprise a roller adjustment mechanism by which the position of the rollers/their axes relative to the heating assembly may be varied. Thus, the roller adjustment mechanism may be used to change the basic position of the heating assembly/its support frame relative to the ring.

Preferably, the adjustment assembly comprises an inductor adjustment mechanism by which the inductor can be positioned relative to the heating assembly/its support frame. This design is particularly advantageous if the heating assembly comprises a plurality of inductors. In this case, the inductors may be separately provided and defined in their position relative to the support frame.

The gap is preferably adapted to the shape or course of the ring and is thus curved. Furthermore, the support frame is preferably adapted to the shape or course of the ring. When multiple inductors are used, each inductor may thus have the same distance to the loop. The entire heating assembly is preferably adapted to the shape or course of the ring.

The ring itself preferably serves as an inductively heatable susceptor and is in particular made of a suitable metal which can be inductively heated. For example, the ring is made at least partially or entirely of steel, such as C50.

For example, the inductor has a total output of 20 to 100KW, preferably about 60 KW.

In all embodiments, it is preferably contemplated that the ring is inductively heated to a temperature of 110 ℃ to 200 ℃, particularly preferably 150 ℃ to 170 ℃.

The ring comprises a baking surface, wherein in all embodiments the baking surface is preferably at least one surface of the ring itself. Alternatively, however, the ring may also be provided with a layer forming a baked surface on its outer surface. Alternatively, the ring may have one baking surface on each of the sides.

The ring is arranged rotatably in or on the frame, which means that under the intended operating conditions the ring rotates around its axis of rotation, i.e. around the axis of rotation of the baking surface. For this purpose, at least one holding roller is preferably rotatably mounted on the machine frame, the ring being supported on the holding roller. There is a preferred configuration in which the loop is suspended from a holding roll. In principle, however, the ring can also be supported upright on at least one holding roller arranged in the lower region. In order to bring about the rotation of the ring, for example, a drive is provided which acts on the holding roller.

Preferably, the ring is mounted on the frame in a floating manner, so that no lateral forced guidance of the ring on the frame is required.

It is optionally contemplated that the baking surface is provided on the outside of the ring, in particular on the outer circumferential surface of the ring. Alternatively, the baking surface may alternatively or additionally be arranged on the inner circumferential surface of the ring.

Optionally, a plurality of baking bands are produced simultaneously on the baking surface, for example on the outer circumferential surface or on the inner circumferential surface.

Drawings

The invention will now be described in more detail with reference to the accompanying drawings, in which

Figure 1 shows a plan view of a possible design of a production plant according to the invention,

FIG. 2 shows a side view of a production plant according to the invention, an

Figure 3 shows a detail of the baking apparatus according to the invention.

Unless otherwise indicated, the reference numerals correspond to the following components:

belt 1, frame 2, loop 3, baking surface 4, heating assembly 5, inductor 6, support frame 7, baked matter application device 8, belt removal device 9, roller 10, holding device 11, inner circumferential surface 12, outer circumferential surface 13, gap 14, adjustment assembly 15, gap distance 16, roller adjustment mechanism 17, shaft 18, inductor adjustment mechanism 19, holding roller 20, drive 21, winding device 22, cutting device 23, flange 24.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Fig. 1 shows a schematic view of a production plant for producing rolled wafers, which comprises a baking device according to the invention.

The baking apparatus comprises a ring 3, which ring 3 is rotatably arranged on the frame 2. The ring 3 comprises a baking surface 4 on which at least one baking belt 1 is produced. In particular, the batter is applied continuously to the heated baking surface 4 by the baking substance application means 8, which is not shown in fig. 1.

The continuously moving baking surface 4 then conveys the applied paste to a belt removal device 9. As the batter is conveyed over the hot baking surface 4, the batter bakes into a baking belt 1. In general, if a plurality of tapes 1 are baked as in the present embodiment, a plurality of tape removing devices 9 are provided.

Fig. 1 is a schematic view, in which some parts, such as a housing, are not shown, in order to be able to describe the structure of the baking apparatus.

In this embodiment, a holding roller 20 is provided, on which the ring 3 is supported. In the present case, the holding roller 20 is rotatably driven by a drive 21, which drive 21 also rotates the ring 3.

The production apparatus shown in figure 1 also comprises a winding device 22 for forming a wafer roll. Furthermore, the production device comprises a cutting device 23 by means of which the wafer rolls are deflected at selectable intervals.

Figure 2 shows a schematic side view of a baking apparatus according to the invention, wherein, again, some components are not shown, as they would interfere with the view of the structure of the baking apparatus.

The roasting apparatus comprises a frame 2 in or on which a ring 3 is rotatably arranged. The ring 3 comprises a baking surface 4 on which baking takes place. In the present embodiment, the baking surface 4 is arranged on the outer circumferential surface 13. The baking substance application device applies the paste. The removal of the baking belt 1 is preferably carried out continuously by the belt removal device 9.

In the illustration of fig. 2, the direction of rotation of the ring 3 is clockwise. This means that in this configuration the baking zone occupies a large part of the circumference of the ring. In particular, the baking zone extends from the baking substance application means 8 to the belt removal means 9 along the direction of rotation of the ring.

For heating the ring 3, in particular the baking surface 4, a heating assembly 5 is provided. The heating assembly 5 comprises at least one inductor 6, wherein in the present case a plurality of inductors 6, in particular eight inductors 6, are provided. The at least one inductor 6 is arranged on a support frame 7. The heating assembly 5 is supported on the ring 3 by means of rollers 10, in the present case on the ring 3 by means of a plurality of rollers 10.

In particular, the heating assembly 5 and the rollers 10 form a cradle-like configuration which follows the ring 3 once it is set in motion and rotated about its axis of rotation. The heating assembly 5 is held in the heating area by a holding device 11. In particular, the heating assembly 5 is coupled to the frame 2 by means of a holding device 11. The holding device 11 is configured in such a way that the heating assembly 5 remains in the heating area even if the ring 3 is moved. However, the heating assembly 5 is arranged to be movable relative to the chassis 2 by means of the holding device 11.

The movability allows the roller 10 to roll freely on the ring 3. In particular, a movement in the radial direction is possible. Now, if the ring 3 is set in motion, it rotates about its axis of rotation. The heating assembly 5 is held in the heating area by a holding device 11. However, in case the ring 3 is not perfectly circular, these tolerance deviations can be compensated by the movable arrangement of the heating assembly 5 with respect to the frame 2.

In particular, a gap 14 is maintained between the inductor 6 and the ring 3. The gap 14 is, for example, an air gap. This gap 14 is a result of at least one roller 10, in particular a plurality of rollers 10, protruding beyond the supporting frame 7 and/or the inductor 6 in the direction of the loop 3.

In the present embodiment, the movable arrangement of the heating assembly 5 with respect to the frame 2 is achieved by the holding means 11, the holding means 11 comprising a rod hinged to the frame 2. As an alternative to this embodiment, it is also possible to provide a straight guide rail in which the bolts rigidly connected to the carrier 7 each project in an elongated hole and are rigidly connected to the machine frame, the elongated holes preferably being arranged parallel to each other and almost radially, so that a straight guide rail can be realized.

In the present embodiment, in particular, the heating assembly 5 is arranged on the region of the inner circumferential surface 12. In the present embodiment, the roller 10 of the heating assembly 5 also rolls over the area of the inner circumferential surface 12. In particular, the heating assembly 5 is arranged in the lower region of the ring 3, preferably in the lower third of the ring 3.

However, according to an alternative embodiment, the heating assembly 5 may be arranged on the outer circumferential surface 13 and rolled thereon. For example, according to this alternative embodiment, the heating assembly 5 may abut the outer circumferential surface 13 of the ring 3 in the upper region. In this case, the baking substance application means 8 are advantageously configured in such a way that the baking substance application means 8 apply the baking substance to the inner circumferential surface 12. Also, in the present embodiment, the belt removing device 9 can remove the belt 1 on the inner circumferential surface 12 of the ring.

The ring 3 is supported on a holding roller 20. Preferably, the holding roller 20 is driven by a driver 21 (not shown) to cause a rotational movement of the ring 3. Furthermore, guide rollers may be provided in all embodiments, by means of which the ring 3 may be centered in its position and by which the ring 3 may be supported in particular.

Also in the embodiment of fig. 2, preferably the entire torrefaction device/production plant is provided with an outer shell, which optionally may be thermally insulated. In particular, fig. 1 and 2 relate to the same embodiment of the torrefaction arrangement/production plant.

Fig. 3 shows an oblique view of a possible design of the baking apparatus, in particular details relating to the heating of the ring 3.

The baking apparatus comprises a heating assembly 5 having at least one inductor 6. In the present embodiment, a plurality of inductors 6 may be provided. In all embodiments, the plurality of inductors 6 are configured as induction heating loops 3, in particular baking surfaces 4. The heating assembly 5 comprises at least one support 7. In the present embodiment, the support frame 7 is of multipart design and comprises lateral supports.

On the support frame 7, an inductor 6 is arranged. In this embodiment, the roller 10 is rotatably mounted on the support frame 7. For connecting the heating assembly 5 to the chassis 2 (which is substantially not shown in this embodiment), a holding device 11 is provided. In the present embodiment, the holding means 11 are configured as articulated rods which connect the heating assembly 5, in particular the support frame 7, to the chassis 2.

The holding device 11 holds the heating assembly 5 in the heating area. In addition, the heating assembly 5 includes a regulating assembly 15. The adjustment assembly 15 includes a roller adjustment mechanism 17. The roller adjustment mechanism 17 allows the position of the roller 10, in particular the axis 18 of the roller 10, to be changed relative to the support frame 7 and/or relative to the at least one inductor 6.

In the present embodiment, the roller adjusting mechanism 17 is configured in such a manner that the position of the roller 10 relative to the supporting frame 7 can be changed.

The adjustment assembly 15 preferably includes an inductor adjustment mechanism 19. The inductor adjustment mechanism 19 is adapted and/or configured to change the position of the inductor 6 relative to the support frame 7 and/or relative to the roller 10.

In the present embodiment, the inductor adjustment mechanism 19 comprises an elongated hole in the support frame 7, into which an extension piece projects, which extension piece is preferably rigidly connected with the inductor 6. This allows the inductor 6 to be displaced relative to the support bracket 7 within the freedom of movement permitted by the elongate aperture.

When the inductor 6 is in the desired position, this position can be defined, for example, by tightening a screw. The same applies to the roller adjustment mechanism 17. By means of the adjusting assembly 15, the gap 14 provided between the at least one inductor 6 and the ring 3 can be adjusted. In particular, when a plurality of inductors 6 are used, the inductor adjustment mechanism 19 may be used to individually adjust the position of the inductors 6.

Preferably, for example, all inductors 6 can be adjusted so that there is a constant gap distance 16 between the inductors 6 and the loop 3. In addition, the adjustment of the gap 14 may be accomplished by a roller adjustment mechanism 17. For example, by changing the position of the roller 10 relative to the support frame 7, the positions of all the inductors 6 can be changed simultaneously.

In all embodiments, the heating assembly 5 and the roller 10 are preferably guided laterally and/or centered on the ring 3. In the embodiment of fig. 3, each roller 10 includes a flange 24 for this purpose. In each case, the flange 24 projects beyond the surface of the ring 3 on which the roller 10 rolls. In the present embodiment, the wheel flange 24 of the roller 10 protrudes beyond the ring 3 in the area of the face of the ring 3, providing lateral guidance. In particular, a flange 24 is arranged on each side of the ring 3, so that guidance can be provided on both sides.

In the present embodiment, two rollers are each arranged on one shaft 18. The roll 10 can be mounted freely movably on this shaft 18 or rigidly connected to the shaft 18, wherein in this case the shaft 18 itself is mounted rotatably.

Preferably, fig. 1 to 3 all relate to the same embodiment. Alternatively, fig. 1-3 are separate embodiments.

For the production of a continuous baking belt 1/rolled wafer, the following steps can be carried out, for example:

in the housing 2, a ring 3 is arranged rotationally. Under expected operating conditions, the ring 3 rotates about its axis of rotation. For this purpose, the ring 3 is supported on a holding roller 20 and is rotatably driven by a drive 21. In addition, the ring 3 is heated by the heating assembly 5.

According to the invention, the heating is inductive, wherein at least one inductor 6 is provided, and wherein the ring 3 itself is inductively heated, whereby preferably the ring 3 itself acts as a susceptor. In particular, a gap 14 is maintained between the inductor 6 and the ring 3. In order to keep the gap distance 16, i.e. the distance between the inductor 6 and the loop 3, constant, rollers 10 are provided which are rotatably mounted on the heating assembly 5 for spacing. The roller 10 rolls on the ring 3 so that the roller 10 also senses tolerance-related deviations. In the case of a heating assembly 5 which is supported in particular directly on the ring 3, the gap distance 16 of the gap 14 can be kept constant even if the ring 3 deviates from a perfectly cylindrical shape due to tolerances.

The heated ring 3 includes a baking surface 4. By means of the torrefying substance application means 8, a preferably liquid torrefying substance is continuously applied to the torrefying surface 4. In all embodiments, the baking substance application means 8 are preferably rigidly/definably coupled to the frame 2 and in particular arranged in a stationary manner/fixed with respect to the machine.

As the baking substance is continuously applied to the moving baking surface 4, a band of baking substance is formed on the baking surface 4. The strip is baked by heating the baking surface 4 during the transport of the strip along the rotating ring 3. At the other point of the frame 2, the baking belt 1 is continuously removed by the belt removal device 9. In particular, the baking strips 1 are removed in a hot, plastically deformable state.

The baking substance used in the baking apparatus preferably comprises a high sugar fraction, such as is known for the production of wafer rolls or wafer sticks. The sugar portion is soft and malleable in its hot state. Only when cooled does the sugar solidify and give the product its characteristic crunchy-crunchy consistency. Within the scope of the present invention, conventional baking substances can be used for baking devices of the type described.

Preferably, a winding device 22 is provided downstream of the strip removal device 9, in order to wind up the strip 1 and form a wafer roll. Furthermore, downstream of the winding device 22, a cutting device 23 can be provided to cut the wafer rolls into a plurality of pieces at selectable intervals.

During winding of the strip 1 by the winding device 22, the strip 1 is wound on a winding spindle which is substantially perpendicular or inclined to the axis of rotation of the ring 3. Furthermore, during winding, the wafer rolls are further conveyed along the winding spindle of the winding device 22, thus continuously forming substantially continuous wafer rolls. Only when the wafer rolls are cut into a plurality of pieces in the cutting device 23 is a single wafer roll/wafer bar formed.

It is optionally contemplated that a plurality of bands 1 adjacent to each other are baked on the ring 3/on the baking surface 4. For each tape 1, a tape removing device 9 or a winding device 22 is preferably provided.