Baking Machine and Winding Device

Abstract

A baking machine includes a winding device (1) for the continuous production of edible wafer rolls provided on the inside with an edible substance. The winding device has a mandrel (2) with a cylindrical winding wall (6) having an exterior winding surface (7) which is adapted for abutment and for rolling of a warm plastically deformable wafer strip and by dint of which, during operation, heat transfer takes place due to the abutment of the wafer strip. An interior of the cylindrical winding wall (6) defines a substance channel (8) for introducing the edible substance into an interior of the wafer roll, and at least one temperature-control channel (9) for guiding a temperature-control medium therethrough. The temperature-control channel (9) extends from a mounted portion (3) of the mandrel (2) into a projecting portion (4) of the mandrel (2) and back again into the mounted portion (3) of the mandrel (2).

Claims

1.-17. (canceled)

18. A winding device (1) for the continuous production of edible wafer rolls provided on the inside with an edible substance, comprising: a mandrel (2) running along a main axis (5), the mandrel (2) having a mounted portion (3), a projecting portion (4) having a free end (19), and a cylindrical winding wall (6), wherein the mandrel (2) in its projecting portion (4) is delimited transversely to the main axis (5) by the cylindrical winding wall (6), the cylindrical winding wall (6) having an exterior winding surface (7) which is adapted for abutment and for rolling of a warm plastically deformable wafer strip and by means of which, during operation, heat transfer takes place due to the abutment of the wafer strip, the interior of the cylindrical winding wall (6) defining a substance channel (8) running along the main axis (5) and at least one temperature-control channel (9), said substance defining channel adapted for introducing the edible substance into an interior of an endless sleeve-shaped hollow body or wafer roll, wherein the substance channel (8) exits from the mandrel (2) in the region of the free end (19), and wherein the substance channel (8) is delimited by a substance channel wall (10), and wherein said at least one temperature-control channel (9) is adapted for guiding a temperature-control medium provided in the interior of the cylindrical winding wall (6), wherein the temperature-control channel (9) extends from the mounted portion (3) of the mandrel (2) into the projecting portion (4) of the mandrel (2) and back again into the mounted portion (3) of the mandrel (2).

19. The winding device (1) according to claim 18, wherein the temperature-control channel (9) runs between the substance channel (8) and the winding wall (6).

20. The winding device (1) according to claim 18 wherein the temperature-control channel (9) is substantially U-shaped and extends as a closed line from the mounted portions (3) of the mandrel (2) into the projecting portion (4) of the mandrel (2) and back again into the mounted portion (3) of the mandrel (2).

21. The winding device (1) according to claim 18, wherein the temperature-control channel (9) comprises a first portion (11) which extends in the interior of the winding wall (6) along the main axis (5) from the mounted portion (3) of the mandrel (2) into the projecting portion (4) of the mandrel (2), and a second portion (12) downstream of the first portion (11) which extends in the interior of the winding wall (6) along the main axis (5) from the projecting portion (4) of the mandrel (2) back again into the mounted portion (3) of the mandrel (2).

22. The winding device (1) according to claim 18, wherein the temperature-control channel (9) is at least partially delimited or formed by the substance channel wall (10) and by the winding wall (6).

23. The winding device (1) according to claim 18, wherein the winding wall (6) has a circular or round cross-section, the substance channel (8) in the interior of the winding wall (6) has a round cross-section arranged concentrically to the winding wall (6), and the temperature-control channel (9) is arranged in the free annularly shaped cross-section (13) between the substance channel wall (10) of the substance channel (8) and the winding wall (6).

24. The winding device (1) according to claim 18, wherein the winding wall (6) has a circular or round cross-section, the substance channel (8) in the interior of the winding wall (6) has an elongate cross-section, and the temperature-control channel (9) is arranged in the free cross-section (13) between the substance channel wall (10) of the substance channel (8) and the winding wall (6).

25. The winding device (1) according to claim 18 wherein the winding wall (6) has a round or circular cross-section, the substance channel (8) and/or the substance channel wall (10) has an elongate cross-section in the region of the winding wall (6), wherein the elongate cross-section extends along a first cross-section axis (14) from the one side of the winding wall (6) to the opposite side of the winding wall (6), and wherein a free cross-section (13) in which the temperature-control channel (9) is arranged is provided between the elongate cross-section of the substance channel wall (10) and the winding wall (6) along a second cross-section axis (15) running normally to the first cross-section axis (14) in the cross-section plane.

26. The winding device (1) according to claim 18, wherein the winding wall (6) has a round or circular cross-section, the substance channel (8) and/or the substance channel wall (10) has an elongate cross-section in the region of the winding wall (6), wherein the elongate cross-section extends along a first cross-section axis (14) from the one side of the winding wall (6) to the opposite side of the winding wall (6), and wherein a free cross-section (13) in which the first portion (11) and the second portion (12) of the temperature-control channel (9) are arranged adjacently following the main axis (5) is provided between the elongate cross-section of the substance channel wall (10) and the winding wall (6) along a second cross-section axis (15) running normally to the first cross-section axis (14) in the cross-section plane.

27. The winding device (1) according to claim 18, wherein the temperature-control channel (9) runs at least in sections spirally or helically between the substance channel wall (10) of the substance channel (8) and the winding wall (6).

28. The winding device (1) according to claim 18, wherein at least two temperature-control channels (9) are provided in the interior of the cylindrical winding wall (6) for conducting a temperature-control medium.

29. The winding device (1) according to claim 28, wherein, the substance channel (8) in the interior of the winding wall (6) has an elongate cross-section, and the two temperature-control channels (9) are arranged on both sides of the substance channel (8) in the free cross-sections (13) between the substance channel wall (10) of the substance channel (8) and the winding wall (6).

30. The winding device (1) according to claim 18, wherein the mandrel (2) is arranged rotatably or rotatably driven about the main axis (5), the mandrel (2) is surrounded in the region of its mounted portion (3) by an annular feed chamber (16) for supplying the temperature-control medium into the temperature-control channel (9) of the rotating mandrel (2), and the mandrel (2) in the region of its mounted portion (3) is spaced apart from the annular feed chamber (16) by an annular discharge chamber (17) for discharging the temperature-control medium from the temperature-control channel (9) of the rotating mandrel (2).

31. The winding device (1) according to claim 18, wherein the temperature-control channel (9) comprises a first portion (11) which extends in the interior of the winding wall along the main axis (5) from the mounted portion (3) of the mandrel (2) into the projecting portion (4) of the mandrel (2), the temperature-control channel (9) comprises a second portion (12) downstream of the first portion (11) which extends in the interior of the winding wall along the main axis (5) from the projecting portion (4) of the mandrel (2) back again into the mounted portion (3) of the mandrel (2), the first portion (11) extends as far as into the mounted portion (3) of the mandrel (2) and there opens in the radial direction or obliquely into the annular feed chamber (16), and the second portion (12) extends as far as into the mounted portion (3) of the mandrel (2) and there opens in the radial direction into the annular discharge chamber (17).

32. The winding device (1) according to claim 18, further comprising a pressing roller (18) which is rotatable or driven rotatably about an auxiliary axis.

33. A baking machine (26) for the continuous production of edible wafer rolls comprising: at least one continuously circulating heated baking surface (21) for baking at least one endless wafer strip (22) which is plastically deformable in the warm state and which is made of a liquid sugar-containing wafer dough; a processing station (23) in which for each baked wafer strip (22) there is provided a removing device (24) adjacent to the baking surface (21); a winding device (1) according to claim 18 and located downstream of the removing device (24) for producing an endless sleeve-shaped hollow body; and a cutting device (25) downstream of the winding device (1) for cutting to length the sleeve-shaped hollow body into individual wafer rolls.

34. A baking machine (26) according to claim 33, characterized in that each winding device (1) has a winding gap arranged obliquely to the path of the relevant baked wafer strip (22) which is formed between two oppositely rotating winding units of which one winding unit is configured as a mandrel (2) around which the baked wafer strip (22) is wound in a helical overlapping manner to form an endless sleeve-shaped hollow body and the other winding unit is configured as a pressing roller (18) which presses the baked wafer strip against the rotating mandrel (2).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The invention is described subsequently in further detail with reference to the figures, wherein

[0049] FIG. 1 shows a plan view of a baking machine according to the invention,

[0050] FIG. 2 shows a schematic oblique view of the winding device,

[0051] FIG. 3 shows a schematic sectional view of the winding device,

[0052] FIG. 4 shows a cross-section of the mandrel in the area of the winding wall and FIGS. 5 and 6 show two different sections of the mandrel.

DETAILED DESCRIPTION OF THE DRAWINGS

[0053] Unless specified differently, the reference numbers correspond to the following components: winding device 1, mandrel 2, mounted portion (of the mandrel 3), projecting portion (of the mandrel) 4, main axis 5, winding wall 6, winding surface 7, substance channel 8, temperature-control channel 9, substance channel wall 10, first portion (of the temperature-control channel) 11, second portion (of the temperature-control channel) 12, free cross-section 13, first cross-section axis 14, second cross-section axis 15, annular feed chamber 16, annular discharge chamber 17, pressing roller 18, free end (of the mandrel) 19, temperature-control channel wall 20, heated baking surface 21, endless wafer strips 22, processing station 23, removing device 24, cutting device 25, and baking machine 26.

[0054] FIG. 1 shows a schematic plan view of a baking machine 26 comprising a winding device 1 according to the invention. In particular, a plurality of winding devices 1 can be provided for the processing of several wafer strips 22. The baking machine 26 for the continuous production of edible wafer rolls can be configured according to the prior art apart from the winding device 1 according to the invention so as to include at least one continuously circulating heated baking surface 21 for baking at least one endless wafer strip 22 which is plastically deformable in the warm state and which is made of a liquid sugar-containing wafer dough, a processing station 23 in which for each baked wafer strip 22 there is provided a removing device 24 adjacent to the baking surface 21 where the removing device 24 is located upstream of the winding device that produces an endless sleeve-shaped hollow body, and a cutting device 25 located downstream of the winding device for cutting to length the sleeve-shaped hollow body into individual wafer rolls. In particular, the feeding of the substance into the winding device can also be accomplished according to conventional devices. Optionally, the winding device of a conventional baking machine, in particular a conventional ring baking machine, can be replaced by the newly proposed winding device.

[0055] FIG. 2 shows a winding device 1 in a schematic oblique view. In particular, this winding device 1 can be attached to conventional ring baking machines in order to enable an improved manufacture of wafer rolls to be provided with a substance on the inner side thereof.

[0056] The winding device 1 comprises a mandrel 2 which runs along a main axis 5 from a mounted portion 3 to a projecting portion 4. A free end 19 is formed by the projecting configuration of the mandrel 2. In the region of the free end 19 the substance channel 8 emerges from the mandrel 2 with the result that the substance conveyed in the substance channel 8 also emerges and can be introduced into the interior of the wafer roll. The mandrel 2 is delimited in its projection portion 4 by a winding wall 6 at least in sections. The winding wall 6 forms a part of the mandrel 2 in the projecting portion 4. A cylindrical winding surface 7 is provided externally on the winding wall 6, which winding surface is adapted for abutment and winding of the warm wafer strip. Furthermore, the winding device 1 comprises a pressing roller 18, which is arranged rotatably and optionally driven about an auxiliary axis. Furthermore, the winding device 1 comprises connections for supplying a temperature-control medium and at least one connection for supplying the substance.

[0057] FIG. 3 shows a sectional view of the embodiment of the winding device 1 according to FIG. 2. The winding device 1 comprises a mandrel 2 which again extends from a mounted portion 3 to a projecting portion 4, wherein the projecting portion 4 comprises a free end 19. The mandrel 2 extends in particular along a main axis 5. The mandrel 2 is at least partially delimited by a winding wall 6 which carries a winding surface 7 on its outer side. In particular, the winding surface 7 is the outer side of the winding wall 6. A substance channel 8 is provided in the interior of the winding wall 6 and in particular in the interior of the mandrel 2. This substance channel 8 emerges in the region of the free end 19 of the mandrel 2 in order to be able to introduce the substance into the wafer roll. According to a preferred embodiment, the substance channel 8 extends substantially centrally along the main axis 5 through the mandrel 2 and is preferably fed at its end opposite the projecting section 4, in particular in the mounted portion 3, in the axial direction. Furthermore, a temperature-control channel not visible in this diagram is provided. The temperature-control channel extends, as can be seen in the further figures, through parts of the mandrel 2. The temperature-control channel is fed in the mounted portion 3 through an annular chamber, wherein in particular an annular feed chamber 16 for supplying the temperature-control medium and an annular discharge chamber 17 for discharging the temperature-control medium are provided. These annular chambers 16, 17 are arranged in a substantially fixed position on a base body of the winding device 1 and filled with a temperature-control medium such as, for example, with a cooling medium. In particular, the temperature-control medium is supplied to the annular feed chamber 16 by a pump.

[0058] Furthermore, the winding device 1 comprises a pressing roller 18, wherein a winding gap is held free between the pressing roller 18 and the mandrel 2, in which the winding or the conveying of the wafer roll to be formed takes place.

[0059] The mandrel 2 is preferably rotatably mounted and driven by means of a drive, rotatably about the main axis 5. The mounting is accomplished for example as in this embodiment by means of two axially spaced-apart bearings, in particular ball bearings. The temperature-control medium can be supplied, for example, through two annular chambers 16, 17 which are spaced apart along the main axis 5.

[0060] FIG. 4 shows a section through the mandrel 2 of the winding device 1 along a plane of intersection which is arranged in the region of the winding wall 6, wherein the main axis 5 in the diagram of FIG. 4 runs substantially projecting. The mandrel 2 comprises a winding wall 6 with an exterior winding surface 7 which is configured to be substantially cylindrical or has a circular cross-section. The circular cross-section can in all embodiments, as also in this embodiment, be interrupted by indentations or recesses such as grooves. Overall however, a substantially circular or cylindrical shape is obtained. In the interior of the mandrel 2, in particular internally inside the winding wall 6, a substance channel 8 is provided. The substance channel 8 is delimited by a substance channel wall 10. Furthermore, at least one temperature-control channel 9 is provided. In the present embodiment, two temperature-control channels 9 are provided. The temperature-control channels 9 each comprise a first portion 11 and a second portion 12, wherein the first portion 11 for example is for the supply of the temperature-control medium and the second portion 12 is the return portion for example, for the return of the temperature-control medium. The substance channel 8, in particular the substance channel wall 10, has an elongate cross-section. In the present embodiment, the elongate cross-section is configured to be substantially oval (oblong). The substance channel 8 extends along the first cross-section axis 14 from one side of the winding wall 6 to the other side of the winding wall 6. Along the second cross-section axis 15 the substance channel 8 and in particular the substance channel wall 10 is arranged at a distance from the outer regions of the winding wall 6, with the result that at least one, in the present case two free cross-sections 13 are formed. In particular, the temperature-control channels 9 are arranged in these free cross-sections 13. In the present embodiment, the free cross-sections 13 have a substantially chord-defined segment shape and are preferably interrupted centrally by a temperature-control channel wall 20 which in particular separates the first portion 11 of the temperature-control channel 9 from the second portion 12 of the temperature-control 9. The temperature-control channel wall 20 preferably ends just before the complete extension length of the temperature-control channel 9 so that in the projecting region, in particular in the region of the maximum distance of the temperature-control channel 9 from the mounted cross-section, an opening is formed from the first portion 11 to the second portion 12.

[0061] FIG. 5 shows a schematic sectional view of mandrel 2 of the winding device 1, which in particular is formed according to the preceding figures, wherein the sectional plane runs substantially along the second cross-section axis 15 depicted in FIG. 4 or the interface A-A. The elongate substance channel 8 extends as far as onto the inner side of the winding wall 6. In the projecting portion 4 of the mandrel 2, in particular in the region of the free end 19 of the mandrel 2, a portion with reduced diameter is provided. This portion is in particular free from temperature-control channels 9.

[0062] FIG. 6 shows a further sectional view of a mandrel 2, which in particular is configured according to the preceding figures, wherein the plane of intersection B-B runs substantially parallel to the first cross-section axis 14 of FIG. 4 and in particular just next to the substance channel wall 10. The mandrel 2 comprises a substance channel 8 which emerges from the mandrel 2 in the region of the free end 19. Furthermore, the mandrel 2 comprises a winding wall 6 with an external winding surface 7. Two temperature-control channels 9 are provided inside the winding surface 7. The temperature-control channels 9 each extend from the mounted region 3 of the mandrel 2 into the projecting portion 4 of the mandrel 2 and back again into the mounted portion 3 of the mandrel 2. The temperature-control medium is fed into the temperature-control channel 9 in particular via an annular feed chamber 16 which can be seen, for example, in FIG. 3. The temperature-control medium is discharged in particular via an annular discharge chamber 17 which can also be deduced from FIG. 3 for example. The temperature-control channel 9 extends in the mounted portion 3 of the mandrel 2 substantially radially or obliquely outwards where an opening is also accomplished through the outer wall of the mandrel 3. In particular, the temperature-control channel 9 or this opening opens into the annular feed chamber 16. As a result, the temperature-control medium can be introduced via the annular feed chamber 16 into the first portion 11 of the temperature-control channel 9. From there the temperature-control medium is conveyed in the temperature-control channel 9 or in the temperature-control channels 9 into the projecting portion of the mandrel 2. In the front region, in particular in the front region of the projecting portion 4, the temperature-control medium passes from the first portion 11 of the temperature-control channel 9 into the second portion 12 of the temperature-control channel 9 and is again conveyed back from the projecting portion 4 of the mandrel 2 into the mounted portion 3 of the mandrel 2. In the mounted portion 3 the second portion 12 of the temperature-control channel 9 emerges substantially in the radial direction or obliquely from the mandrel 2, wherein the annular discharge chamber 17 is provided in this region, which enables the temperature-control medium to be discharged.

[0063] According to an embodiment not shown, a temperature-control channel 9 extends at least in sections in a spiral or helical manner from the mounted portion 3 of the mandrel 2 into the projecting portion 4 of the mandrel 2 and back again into the mounted portion 3 of the mandrel 2. The temperature-control channel 9 is configured similarly to the other embodiments in a U shape wherein, however its profile is not rectilinear but is configured to be spiral or helical. Optionally a plurality of temperature-control channels 9 can be provided with a spiral configuration.

[0064] In the spiral embodiment, it can for example be provided that this substance channel 8 having an elongate cross-section is also configured to be spiral. In particular, such a substance channel 8 can have an elongate cross-section, wherein the elongate cross-section is inclined or rotates along the profile of the main axis 5. Thus, the elongate cross-section has a first cross-section axis 14 and a second cross-section axis 15, wherein the substance channel 8 has a greater extension along its first cross-section axis 14 than along its second cross-section axis 15. Along the course of the main axis 15 these axes are twisted with the result that a spiral configuration of the substance channel 8 along the main axis 5 is obtained. The temperature-control channels 9 are preferably arranged in the spirally configured free cross-sections 13 formed by this rotation along the main axis 5.

[0065] According to an alternative configuration, the substance channel 8 is arranged centrally, in particular concentrically to the winding wall 6 or to the winding surface 7. In this embodiment at least one temperature-control channel 9 extends in an annular region between substance channel wall 10 and winding wall 6, wherein preferably two or more temperature-control channels 9 can be provided. These temperature-control channels 9 can run in the region between the substance channel wall 10 and the winding wall 6 rectilinearly or spirally, an in particular in a U shape.

[0066] According to a preferred embodiment, the temperature-control channels 9 are arranged spirally and wrap around a centrally arranged substance channel 8. Also in this embodiment, the temperature-control channel 9 or the temperature-control channels 9 are formed in a U shape and extend from the mounted portion 3 into the projecting portion 4 and back again into the mounted portion 3.