Patent Publication Number: US-2019191722-A1

Title: Method And Device For Treating Dough

Description:
TECHNICAL FIELD 
     The present teaching relates to a method for treating dough, in particular for producing pizza bases, according to the present teaching as well as a device in accordance with the present teaching. 
     BACKGROUND 
     The prior art includes various known methods and devices with which dough for pizzas or other pastries are shaped by a stamp or an array of rollers. 
     One device known from the prior art, for example, is disclosed in patent DE 102007006395 A1, in which pizza bases are produced by being rolled or punched out on a pad. In addition, patent EP 2174549 A1 discloses an apparatus for pressing pizza bases, comprising a number of concentric rings, which are applied on the piece of dough one after the other in a staggered manner and thus shape the pizza base. 
     A disadvantage of the devices and methods known from the prior art is that, for the most part, only pizza bases with a constant cross-section and/or uniform thickness can be produced and it tends to be difficult or completely impossible to adjust the thickness of a pastry. In addition, the dough is subjected to continuous pressure, possibly causing negative flow behavior and tears in the dough. 
     SUMMARY 
     It is therefore one object of the present teaching to provide a method by which the production of dough is improved and negative impacts of mechanical processing on the dough are reduced. 
     This object is achieved by means of the characteristic features of the present teachings, which foresee that the press rings are extended one after the other outwardly in a staggered manner from the center of the press rings in the direction of the support, and the surface of the piece of dough below is enlarged. 
     The staggered lowering of the press rings also causes an advantageous spreading of the dough and ensures an unimpeded flow of dough. 
     It is likewise an object of the present teaching to provide a device for performing the inventive method or for the production of pastries, said device allowing on the one hand simple adjusting of the thickness profile of a pastry that is to be produced and on the other hand providing simple adjustment mechanisms for modifying the processing profile of the pieces of dough. 
     This object is achieved by means of the characteristic features of the present teachings, which foresees that a propulsion device is provided by which the press rings can be moved along their ring axis like a telescope, independently of one another, from a first position into a second position. 
     The press rings&#39; ability to slide independently makes it possible to use different pressing profiles and pressing processes and to produce various shapes for dough and/or for the piece of dough that is to be produced. 
     Particularly advantageous embodiments of the method and of the device are presented in greater detail by means of the features in the dependent claims. 
     The flowing motion of the dough can additionally be improved if adjacent press rings in each case are applied to the dough one after the other outwardly from the center of the pressure stamp and reshape the dough, and after application of the respective adjacent press rings, they are withdrawn again, so that at all times only a partial number of the press rings, in particular a number of adjacent press rings, are in contact with the piece of dough. 
     Advantageous reshaping of the dough is achieved if the pressure of the press rings is adjusted in such a way that, after extending the radially most outward of the press rings, the piece of dough has the predetermined shape of the pastry, in particular of a pizza base. 
     The shape of the completed pastry can be additionally improved in that the distance between the individual press rings and the support of the piece of dough and/or the pressing time and/or pressing force is predetermined for every press ring before and/or during the pressing procedure. 
     A preferred configuration of the device is achieved if in each case the press ring situated closer to the ring axis has a slightly smaller outer diameter than the inner diameter of the adjacent press ring situated farther away from the ring axis and if the press rings can be slid into one another. 
     Preferred positions of the device are those in which the press rings in the first position are disposed co-planarly in one plane and constitute a flat front surface of the pressure stamp and in the second position are at various distances to the support, in particular the abutment, and/or, with the support, in particular the abutment, the press rings configure a negative shape of the pastry to be produced. 
     The distance between press ring and support, as well as the pressing force and the pressing duration, can preferably be selected in that the propulsion device comprises a camshaft powered by a motor or in some other way, so that by rotating the camshaft the press rings can be moved from the first position along the ring axis like a telescope, in particular independently of one another, into the second position. 
     A preferred embodiment of the present teaching foresees that the press rings comprise a recess, which in particular passes completely through them, running radially to the press rings, so that the camshaft is inserted into the recess, coaxially with the course of the recess, and at least one cam of the camshaft impacts one press ring in each case and is adjacent with it in the recess. 
     Free play between the press ring and the cam of the camshaft is advantageously prevented if the recess is of circular configuration and the cams are configured in such a way that every cam is supported on two radially opposite points of the wall of the recess. 
     Preferred force distribution from the camshaft to the press rings is achieved in that the press rings comprise a recess that passes completely through them, surrounding them radially, such that the camshaft is inserted into the recess and positioned coaxially to the recess and extends over the entire recess above the press rings, such that the camshaft impacts every press ring with two identically configured cams in each case on two points diametrically opposite to the ring axis of the press rings. 
     In one embodiment, for the prevention of wear, the force transmission between cam and rings can be configured by means of a gliding agent, such as plastic, or by rollers or the like. 
     Advantageous adjustment of the exit depth or minimum distance between the press rings and the support is obtained in that at least one restricting device is provided, which limits the sliding of the press rings with respect to one another along the ring axis and/or fixes the distance of the press rings from the support, in particular the abutment, preferably in the second position. 
     To provide a preferred configuration of the restricting device, said device is configured by at least one wedge, such that the wedge is positioned between a cam and the press ring. 
     A preferred embodiment of the device is achieved in that the press rings can be rotated about their ring axis, in particular at an angle, and
         that a wedge pair is disposed between each press ring and the cam contiguous with the respective press ring at two radially opposite points of the wall of the recess,   that the first and the second wedge of the pair are configured as a wedge ring, in particular as a wedge ring segment, and have the same center diameter as the press ring on which the respective wedge is mounted and are disposed congruent with it,   that the first wedge and second wedge over one section each have a varying thickness, in particular uniform thickness increase or thickness decrease, in the direction of the ring axis of the press rings and comprise a plane of contact with the respective cam that is steeply positioned with respect to the radius of the press rings, such that the planes of contact of the first wedge and of the second wedge with the respective cam run parallel to one another and so that the distance of the respective press ring to the support, in particular the abutment, can be modified by rotating the press rings.       

     An additional embodiment of the device can be achieved if every press ring can be moved with the cams, in each case by the pressure rod contiguous with one of the cams, such that the pressure rods are disposed in such a way that on rotating the camshaft the press rings can be moved out of the first position, along the ring axis like a telescope, in particular independently of one another, into the second position. The configuration and arrangement by means of pressure rods allows exact and simple movement of the pressure stamp with simultaneous minor wear of individual components. 
     In an advantageous embodiment, the camshaft is disposed perpendicular to the ring axis and intersects said axis, in particular at the halfway point of the camshaft, such that the camshaft comprises in each case two identically configured cams, which are positioned diametrically opposite on the camshaft, and such that in each case a press ring is movably connected with a cam by means of a pressure rod and, in particular situated diametrically opposite the ring axis of the press rings, is movably connected with the second identically configured cam by means of an additional pressure rod. 
     Friction between the pressure rods and the cams can be reduced if the pressure rods each comprise, on the end contiguous with the cams, a roller contiguous with the periphery of the respective cam, such that the respective roller is positioned so that it rolls out upon rotation of the camshaft on the periphery of the respective cam. 
     The pressure rods can be steered easily if the pressure rods are positioned parallel to the ring axis, such that the pressure rods are each fed into at least one guide sheath while each guide sheath is supported on the housing of the device or of the pressure stamp. 
     To be able to easily prevent any lifting of the pressure rods from the cams, the pressure rods can each be force-impactable by means of a spring, in particular a pressure spring, such that the respective spring is configured and mounted in such a way that the respective pressure rod can be pressed in the direction of the cams. 
     To be able to define the border of a pastry, or to be able to shape it advantageously, it is foreseen that the pressure stamp should comprise a border ring, such that the border ring comprises a negative shape of the border of the pastry to be produced by the device. 
     It is advantageous for the border ring to have a greater diameter than the largest of the press rings, or for the border ring to be mounted on the largest of the press rings. 
     It is advantageous if the shape of the pastry to be produced is preset and if soiling of the press rings is prevented in that at least one separator element, in particular an elastic element, in particular a membrane and/or a shape, in particular a pizza shape, is positioned between the press rings and the support, in particular the abutment. 
     An advantageous embodiment of the device is obtained if the device comprises two identically configured pressure stamps, such that the two pressure stamps are situated opposite one another and the press rings of the first pressure stamp and the press rings of the second pressure stamp are positioned concentrically with one another and such that the first pressure stamp and the second pressure stamp each configure the support, in particular the abutment, of the other pressure stamp. 
     The device can advantageously be transported and deployed anywhere desired along a manufacturing chain, in that the first pressure stamp and/or the second pressure stamp is mounted on a moveable frame, in particular a roller wagon. 
     To press a piece of dough of any size into pastries it is foreseen that the distance between the first pressure stamp and the second pressure stamp is adjustable. 
     It is advantageous to foresee that the device comprises at least one adjustment device, such that the adjustment device is linked to the pressure stamp and such that the pressure stamp can be moved by the adjustment device along the ring axis, in particular in the direction of the support, preferably of the abutment, or
         that preferably the device comprises two adjustment devices, such that the first adjustment device is linked to the first pressure stamp and the second adjustment device is linked to the second pressure stamp and such that the first pressure stamp and second pressure stamp can be moved by the adjustment device along the ring axis of the respective pressure stamp, in particular independently of one another.       

     Preferred configurations of the adjustment device can be provided in that the adjustment device, in particular the adjustment devices, can be a hydraulic cylinder, a pneumatic cylinder or a linear motor. 
     Alternatively, this can also occur by means of other powering forms, such as an eccentric tappet, a curve disc, chains, toothed racks. 
     Other advantages and configurations of the present teaching can be seen from the description and the attached drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present teaching is schematically depicted hereinafter with reference to the particularly advantageous embodiments, which however are not to be considered restrictive, in the drawings and it is described by way of example with reference to the drawings, which are as follows: 
         FIG. 1  shows a pressure stamp of an inventive device in a perspective view. 
         FIG. 2  shows a section view of the pressure stamp in a first position. 
         FIG. 3  shows a section view of the pressure stamp in a second position. 
         FIG. 4  shows a partial section view of the pressure stamp in an isometric view. 
         FIG. 5  shows a perspective view of the rear side of the pressure stamp. 
         FIG. 6  shows a wedge ring in a perspective view. 
         FIGS. 6 a  and 6 b    show a pressing procedure in accordance with the inventive method. 
         FIG. 7  shows an embodiment of the present teaching in perspective view. 
         FIG. 8  shows an embodiment of the inventive device in section view. 
         FIG. 9  shows an additional embodiment in a section view. 
         FIG. 10  shows a section view of the embodiment in accordance with  FIG. 9 . 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  is a perspective depiction of the pressure stamp  1  viewed in the direction toward its underside or toward the press rings  11   a ,  11   b ,  11   c . The inventive device  10  for processing dough comprises at least one pressure stamp  1 . An embodiment of the pressure stamp is illustrated in  FIG. 1 . The pressure stamp  1  includes seven press rings  11   a - 11   g , such that the first press ring  11   a  is positioned in the center of the press rings  11   a - 11   g . The first press ring  11   a  is of cylindrical configuration. The second press ring  11   b  is positioned around the first press ring  11   a . The press ring  11   b  is disposed concentrically on a plane with the press ring  11   a  and its inside is contiguous with the first press ring  11   a . The third press ring  11   c , fourth press ring  11   d , fifth press ring  11   e , sixth press ring  11   f  and seventh press ring  11   g  are situated concentrically with the first press ring  11  and are positioned staggered, one beside the other. The first press ring  11   a  thus comprises a slightly smaller outer diameter than the inner diameter of the second press ring  11   b , and so on. Analogously to the outer diameter of the first press ring  11   a  and the inner diameter of the second press ring  11   b , the other press rings  11   c - 11   g  are each telescopically mounted in one another, such that each set of adjacent press rings, such as press ring  11   b  with press ring  11   c  or press ring  11   c  with press ring  11   d , are positioned so that they can slide toward one another with respect to their ring axis  14 . Press rings  11   a - 11   g  are each mounted and steered on the inner circumference and the outer circumference on the neighboring press rings  11   b  to  11   g . Guidance of the press rings  11   a - 11   g  allows sliding of the press rings  11 - 11   g  with respect to one another and thus makes possible a staggered sliding of the individual press rings  11   a - 11   g . The pressure stamp  1  on one of its side surfaces comprises a propulsion device  20 , positioned on the pressure stamp  1 . The propulsion device  20  includes a camshaft  21  ( FIG. 2  through  FIG. 4 ) and an electric motor  22 , which can rotate the camshaft  21  in its axis  27 . A border ring  12  is positioned on the pressure stamp  1  around the largest or outermost press ring  11   g . The press rings  11   a - 11   g  comprise a level front surface and in a first position ( FIG. 2 ) are coplanarly positioned in a plane and in the first position form a level front surface  13  of the pressure stamp  11 . 
       FIG. 2  is a section view of the pressure stamp  1  in a first position. The press rings  11   a - 11   g  are positioned in the first position coplanarly, so that their front ends configure a flat front surface  13  of the pressure stamp  1 . The press rings  11   a - 11   g  are positioned so that they can slide telescopically toward one another in the ring axis, independently of one another. The pressure stamp  1  comprises a recess  15  running radially to the ring axis  14  of the press rings  11   a - 11   g , which passes completely through the press rings  11   a - 11   g  and the pressure stamp  1 . The propulsion device  20  in this embodiment comprises a motor  22  and a camshaft  21 . The camshaft  21  here is completely inserted in the recess  15  and runs coaxially to the circularly or cylindrically shaped recess  15 . The camshaft  21  comprises fourteen cams  23   b  through  23   g  and  24   a  through  24   g . The camshaft  21  here is inserted in such a way in the recess  15  that seven of the cams  23   b  through  23   g  come down on one side with respect to the ring axis  14  and the seven other cams  24   a  through  24   g  are situated on the diametrically opposite side of the ring axis  14 . The cams  23   b  through  23   g  and  24   a  through  24   g  each impact or touch one press ring  11   a  through  11   g . The cams  23   b  through  23   g  and  24   a  through  24   g  here are arranged in pairs, so that the respective cam pairs  23   a  and  24   a  impact the same press ring  11   a  and thus are positioned diametrically opposite the ring axis  14  along the camshaft  21 . The cams  23   a  through  23   g  or  24   a  through  24   g  of the camshaft  21  are, in addition, contiguous with two diametrically opposite points of the wall of the recess  15  or of the axis  27  of the camshaft  21 . Upon rotation of the camshaft  21  in its axis  27 , the press ring  11   a  through  11   g  linked in each case to the cams  23   a  through  23   g  or  24   a  through  24   g  is moved or slid in the direction of the ring axis  14  and slides in each case along the adjacent press ring  11   a - 11   g , for example the third press ring  11   c , on the two press rings  11   b  and  11   d  and is guided by it. The pressure stamp  1 , in addition, comprises a border ring  12 , whose inner diameter is configured larger than the outer diameter of the largest press ring  11   g . The border ring  12  here comprises a negative shape of the border of the pastry that is to be pressed and in this embodiment comprises a semicircular press shape. 
       FIG. 3  shows the pressure stamp  1  of the inventive device  10  in a second position in accordance with the section view depicted in  FIG. 2 . The second position of the press rings  11   a - 11   g  occurs, for example, after the pressing operation of one piece of dough, such that in this second position the press rings  11   a - 11   g  are positioned staggered with respect to one another and the outermost press ring  11   g  is extended the farthest outward. The shape of the cams  23   a  through  24   g  here determines the position of the press rings  11   a  through  11   g  with respect to one another or the course of the position of the press rings  11   a  through  11   g  to one another and their distance to the support  13  or to the piece of dough. 
     The device  10 , in addition, includes a restricting device, which selects and pre-sets the minimum and maximum distance of the press rings  11   a  through  11   g  from the support  3  or the abutment. A detail view of the restricting device is shown in  FIG. 4 . The restricting device in this embodiment consists of a wedge system. One wedge pair  81  through  87  and  91  through  97  ( FIG. 2 ,  FIG. 3 ) is disposed between each cam  23   a  through  24   g  and the respective press ring  11   a  through  11   g . The wedge pairs  81  through  87  and  91  through  97  are disposed here diametrically opposite the ring axis  14  in each case, between the respective press ring  11   a  through  11   g  and the corresponding cam  23   a  through  23   g  and  24   a  through  24   g . The wedge pair  81  connects the cam  23   a  with the press ring  11   a , and the wedge pair  91 , positioned diametrically with respect to the ring axis  14 , is analogously positioned between the cam  24   a  and the press ring  11   a . Likewise, the other wedge pairs  82  through  87  and  92  through  97  are each, with respect to the ring axis  14 , disposed in pairs between two cams, for example cams  23   b  and  24   b , and the second press ring  11   b . The maximum or minimum distance between the respective press ring  11   a  through  11   g  and the support  3  is modified and adjusted depending on the thickness of the wedge pair  81  ( FIG. 2 ,  FIG. 3 ). The wedge pair  81  thus consists, as do the other wedge pairs  82  through  97 , of a first wedge  81   a  and a second wedge  81   b , which are each positioned diametrically opposite between the respective cam  23   a  through  24   g  and the wall of the recess  15  or the respective press ring  11   a  through  11   g.    
       FIG. 6  shows a detail view of a wedge, here the second wedge  82   b , which has the same curvature as the press ring  11   b  with the cam  23   b  and is positioned congruent with the press ring  11   b  ( FIG. 2 ,  FIG. 3 ,  FIG. 4 ). The first wedges  81   a  through  87   a  or the second wedges  81   b  through  87   b  are each configured as wedge ring segments and each have the same center diameter as the press rings  11   a ,  11   b  through  11   g , on which the respective wedge  81   a  through  87   b  is disposed. The wedges  81   a  through  87   b  have a varying thickness along their circular periphery, such that the thickness increases uniformly along the periphery, or increases or decreases uniformly from one end of the wedge  81   a  through  87   b  ( FIG. 6 ) to its other end. The increase or decrease in thickness of the wedges  81   a  through  87   b  configures a steep plane, inclined with respect to the base surface of the respective wedge  81   a  through  87   b , as illustrated in  FIG. 6  for the wedge  82   b . The respective wedge pair  81  through  87  in each case thus constitutes, with the respective cam  23   a  through  24   g  of camshaft  21 , two contact planes situated parallel to one another. The thickness of the first wedge  81   a  or second wedge  81   b , which are situated between the camshaft  21  and the press ring  11   a , determines the position of the press ring  11   a  with respect to the camshaft  21  ( FIG. 4 ). By rotating one of the wedges  81   a ,  81   b  or the wedge pair  81  or the wedge pairs  81  through  87  or  91  through  97  about the ring axis  14  and thus the modification of the thickness of the wedge pair  81  contiguous with the cam  11   a , the exit depth or distance between the respective press ring  11   a  through  11   g  and the support  13  or the abutment is adjusted. Rotating the other wedge pairs  82  through  87  or  91  through  97  analogously with the wedge pair  81  likewise causes an adjustment of the distance to the support  3  of the press ring  11   b  through  11   g  disposed in each case on the wedge pair  82  through  87 . 
     To adjust the wedge pairs  81  through  87  and  91 , the first wedges  81   a  through  87   a  and  91   a  through  97   a  are each disposed on an adjustment ring  90   a  through  90   g , such that in each case the adjustment rings  90   a  through  90   g  have the same inner diameter and outer diameter as the press rings  11   a  through  11   g  placed in each case below them ( FIG. 4 ) and are disposed by means of it on the front surface of the press rings  11   a  through  11   g  distant from the support  13 . To suspend the adjustment rings  90   a  through  90   g  and the press rings  11   a  through  11   g , there are four guide pins  89   a  through  89   g  foreseen in each case, which suspend or store the adjustment rings  90   a  through  90   g  or the press rings  11   a  through  11   g  on a support plate  88 . The support plate  88  in each case, in the area of the guide pins  89   a  through  89   g , comprises a recess similar to a longitudinal hole running over a peripheral area, through which the guide pins  89   a  through  89   g  can be rotated in these recesses and thus the press rings  11   a  through  11   g  or the adjustment rings  90   a  through  90   g  can be rotated within an angle. By rotating the press rings  11   a  through  11   g  or the adjustment rings  90   a  through  90   g , the thickness of the wedges or wedge pairs  81  through  97  positioned on them is modified and thus the exit depth of the press rings  11   a  through  11   g  or the distance between the press rings  11   a  and  11   g  and that of the support  13  is modified. 
     The inventive method for the production or processing of dough, in particular the production of pizza bases, is described hereinafter by way of example with reference to  FIG. 6 a    and  FIG. 6   b:    
     To produce pizza bases or other pastries, a piece of dough  6 , illustrated in  FIG. 6 a   , is laid on the support  3  of the device  10  ( FIG. 2 ,  FIG. 3 ). The pressure stamp  1  is positioned above the support  3 , so that the innermost press ring  11   a  comes to rest over the piece of dough  6 . The press rings  11   a  through  11   g  are then placed in a series on the piece of dough  6 , so that the dough of the piece of dough  6  begins to flow. For said purpose, the press rings  11   a  through  11   g  from the first position ( FIG. 2 ), in which the press rings  11   a  through  11   g  are in coplanar position and configure a flat front surface  13  of the pressure stamp  1 , are lowered one after the other, staggered from the innermost press ring  11   a  to the outermost press ring  11   g , so that the press rings  11   a  through  11   g  act on the piece of dough  6  and so that the piece of dough  6  increases its surface under the pressure of the press rings  11   a  through  11   g . The press ring  11   a  is the first to be moved from the first position downward in the direction of the support  3  and acts on the piece of dough  6 , so that it increases its surface. By rotating the camshaft  21 , the press rings  11   b ,  11   c  through  11   g  are then lowered one after the other and act in sequence on the piece of dough  6 . The cams  23   a  through  24   g  or the camshaft  21  are thus configured in such a way that a process of lowering the press rings  11   a  through  11   g  follows, and after a predetermined pressing duration the respective press ring  11   a  through  11   g  is again lifted off the reshaped piece of dough  6 . Thus at any time only a part of the press rings  11   a  through  11   g  is in contact with the piece of dough  6 , such that the press rings then in contact are each adjacent press rings. The lowering movement of the press rings, which is caused by the camshaft  21 , is equivalent here to a wave-shape, which, starting from the center of the pressure stamp  1 , that is, the ring axis  14  of the press rings  11   a  through  11   g , proceeding outward, is extended as far as the outermost press ring  11   g . The resulting wave-shaped expansion of the piece of dough  6  causes an enlargement of the surface of the piece of dough  6  in the radial direction and the generating of the resulting pastry or pizza base. After lowering of the final press ring  11   g  or of the largest press ring  11   g , it is kept in position, so that the dough flows into the border ring  12 , which may happen to be present, and forms the edge of the pastry. The wave-shaped lowering and re-elevation of the press rings  11   a  through  11   g  thus causes an advantageous flowing movement of the dough of the piece of dough  6  without tearing it or causing unfavorable impacts on the dough. 
       FIG. 7  shows an additional embodiment of the device  10  in perspective view. The device  10  comprises two pressure stamps  100 ,  200 , which are positioned on a movable frame, in this embodiment a roller wagon  300 . The first pressure stamp  100  here is disposed with respect to the second pressure stamp  200 , such that the ring axes of the press rings  111   a  through  111   g  of the first pressure stamp  100  and the press rings  211   a  through  211   g  of the second pressure stamp  200  are disposed concentric to one another. The press rings  111   a  through  111   g  of the first pressure stamp  100  or the front surface  113  of the first pressure stamp  100  point to the front surface  213  of the second pressure stamp  200  or the front surface of the press rings  211   a  through  211   g  of the second pressure stamp. The press rings  111   a  through  111   g  of the first pressure stamp  100  or the press rings  211   a  through  211   g  of the second pressure stamp  200  are thus movable in each case toward the opposite press ring of the opposite pressure stamp  100 ,  200 . In this embodiment of the inventive device  10 , the first pressure stamp  100  is the support or abutment of the second pressure stamp  200 , or the second pressure stamp  200  is the support or abutment of the first pressure stamp  100 . In this embodiment of the inventive device  10 , a piece of dough  6  is placed on the second pressure stamp  200  and the described pressing process is simultaneously performed by both pressure stamps  100 ,  200 , either in a time-staggered manner or synchronized. The disposal of the two pressure stamps  100 ,  200  makes possible a variable shape of the pastry or a differentiated thickness distribution of the pizza base or of the pastry over the diameter. The pressure stamps  100 ,  200  are each fastened to an adjustment device  4   a  or  4   b , such that the adjustment devices  4   a  and  4   b  are configured by a hydraulic cylinder. The adjustment device  4   a  and  4   b  allow the adjustment of the pressure stamp  100 ,  200  with respect to one another.  FIG. 8  shows a section view of the device  10  described in  FIG. 7 , such that the adjustment devices  4   a ,  4   b  and the roller wagon  300  or the frame are not illustrated. The second pressure stamp  200  here is configured identically to the first pressure stamp  100 , such that the second pressure stamp  200  comprises no border ring  12 . The arrangement of the two pressure stamps  100 ,  200  makes possible an improved wave-shaped kneading apparatus, such that both pressure stamps  100 ,  200 , in synchronized manner, proceeding from the center outward, perform a wave-shaped kneading motion and uniformly reshape any piece of dough  6  that may be situated between them into a pizza base or other pastry. 
     As an alternative to the illustrated press rings  11   a  through  11   g , a different number of press rings may be available, such that the thickness of the press rings or the shape, in particular the front surface, can also be profiled. 
       FIGS. 9 and 10  show an alternative embodiment of the device  10  in two section views. The pressure stamp  1  comprises a camshaft  21 , which is disposed perpendicular to the ring axis  14  of the press rings  11   a  through  11   f . The press rings  11   a  through  11   f  can be moved in the direction of the ring axis  14 . The camshaft  21  includes twelve cams  23   a  through  23   f  and  24   a  through  24   f , such that in each case two of the cams  23   a  through  24   f  are equal in configuration. Thus, for example, the cams  23   a  and  24   a , which are disposed diametrically opposite the ring axis  14  on the camshaft  21 , are of identical configuration, that is, they have the same elevation or eccentricity. The camshaft  21  in this embodiment comprises six identically configured cam pairs  23   a ,  24   a  through  23   f ,  24   f . The pressure stamp of the device  10  comprises a number of pressure rods  40   a  through  41   f  corresponding to the number of cams  23   a  through  24   f , such that the pressure rods  40   a  through  41   f  are contiguous with the cams  23   a  through  23   f . The pressure rods  40   a  through  41   f  are bolted together with the press rings  11   a  through  11   f  at the end opposite the cams  23   a  through  24   f , such that in each case one press ring  11   a  through  11   f  is connected with two pressure rods  40   a  through  41   f , which preferably are disposed on two diametrically opposite points of the press rings  11   a  through  11   f . In the embodiment of the pressure stamp  1  of the device  10 , shown in  FIG. 9 , the cam  23   a , for instance, is configured identically with cam  24   a , which are disposed on the camshaft  21  diametrically opposite the ring axis  14 . The cams  23   a  and  24   a  are each connected by a pressure rod  40   a  or  41   a  with the first press ring  11   a . In addition, the cam  23   b  is thus identical in configuration with the cam  24   b  and, corresponding to the cam  23   a  and  24   a , connected with the press ring  11   b  by two pressure rods  40   b  and  41   b . Corresponding to the cams  23   a  and  24   a , the cams  23   c  through  23   f  and  24   c  through  24   f  are also each in pairs identically configured and, diametrically opposite the ring axis  14 , disposed on the camshaft  21  and connected by corresponding pressure rods  40   c  through  40   f  and  41   c  through  41   f  with the press rings  11   c  through  11   f . The pressure rods  40   a  through  41   f  are each contiguous at one end with the cams  23   a  through  24   f  and are connected on the opposite end with the press rings  11   a  through  11   f  by a screw connection. On the end of the pressure rods  40   a  through  41   f  contiguous with the cams  23   a  through  24   f , a roller  42  is positioned, which in each case is mounted on the respective pressure rods  40   a  through  41   f . The rollers  42  are each contiguous with the periphery of the respective cam  23   a  through  24   f , such that the respective roller  42  rolls out upon the rotation of the camshaft  21  on the periphery of the respective cam  23   a  through  24   f . Upon rotation of the camshaft  21  and the connected rotation of the cams  23   a  through  24   f , the pressure rods  40   a  through  41   f  are moved along the ring axis  14  and thus the press rings  11   a  through  11   f  are each likewise moved or extended along the ring axis  14  by the pressure rods  40   a  through  41   f  connected with the press rings  11   a  through  11   f.    
     As illustrated in  FIG. 9 , the pressure rods  40   a  through  40   f  can be connected on the housing of the pressure stamp  1  or of the device  10  and guided, such that the pressure rods  40   a  through  41   f  are preferably guided by a guide sheath  43 , which is supported in the housing of the pressure stamp  1  or the device  10 . As shown in  FIG. 9 , two guide sheaths  43  also can be provided for each pressure rod  40   a  through  41   f , said sheaths being positioned parallel to the ring axis  14 . Alternatively, other configurations of the guides can also be selected or the pressure rods  40   a  through  41   f  can be movably positioned by other guides known in the prior art. 
     Preferably the pressure rods  40   a  through  41   f  can each be pressed by means of a spring in the direction of the camshaft  21  or cams  23   a  through  24   f , and thus the pressure rods  40   a  through  41   f  are constantly contiguous with the periphery of the respective cams  23   a  through  24   f .  FIG. 9  demonstrates this with a preferred embodiment, in which the spring is configured as a pressure spring  44 , which is disposed in each case on the end of the pressure rods  40   a  through  41   f  that is close to the press ring  11   a  through  11   f . The respective pressure spring  44  is supported on a support plate  88  supported on the housing of the pressure stamp  1  and on a protrusion of the respective pressure rods  40   a  through  41   f , and presses the respective pressure rod  40   a  through  41   f  in the direction of the respective cam  23   a  through  24   f . Alternatively, a corresponding configuration can also be provided by means of tension springs or other force-exerting elements. 
       FIG. 10  shows a section view in accordance with  FIG. 9 , such that the section axis is rotated in position by 90 degrees, thus perpendicular to the axis of the camshaft  21 . In the perpendicular axis to the camshaft  21 , for each press ring  11   a  through  11   f  two guide pins  89  are in place, which are steered by means of guide sheaths  43 , corresponding to the pressure rods  40   a  through  41   f  on the housing of the pressure stamp  1  of the device  10 . The guide pins  49  make possible a more precise steering of the respective press rings  11   a  through  11   f , so that they can be moved uniformly in the direction of the ring axis  14 . Corresponding to the embodiments in  FIGS. 1 through 6  and  FIGS. 7 and 8 , analogously to the relevant method, a piece of dough  6 , with the help of the pressure stamp  1  of  FIG. 9  or  FIG. 10 , is shaped one piece at a time by successive lowering of the press rings  11   a  through  11   f  and by applying pressure forces a pastry, in particular a pizza base, is formed. 
     As depicted in  FIG. 7  and  FIG. 8 , the embodiment of the pressure stamp  1  of  FIG. 9  and  FIG. 10  can also be analogously duplicated and placed in opposite position along a vertical axis. 
     As an alternative to the illustrated embodiments, the force transmission between cam and the press rings or the pressure rods can also be configured by a gliding element, for example plastic or by means of rollers or other configurations to reduce wear. Alternatively, separation of the shaped pastry or of the piece of dough  6  from the press rings or the pressure stamps  1  can also be provided by means of a separator element, such as for example oil or flour. Alternatively to the indicated propulsion methods, the adjustment device can also take the form of an eccentric tappet, curved disk, chains, toothed rack or the like or could be a hydraulic cylinder, a pneumatic cylinder or linear motor. 
     Alternatively, for cleaning purposes, the stamp can be adapted for disassembly without tools, or a basic unit can be operated with various stamp sizes in order to be able to produce different pizza sizes, with and without borders.