CA2463327A1 - Tools supporting and heating device - Google Patents

Abstract

Tools supporting and heating device (20) for tools like printing plates, used for diecutting and hot pressure transfer of portions of metallic films (4) on a substrate (12). This device comprises a base plate (40) applied against one of the sides of the honeycomb chase (24). This base plate is made of a sequence of at least one insulating surface (21, 23, 41) and of at least one conducting surface (22, 42, 44) enabling to feed at least one heating device (30) intended to be inserted inside each one of said apertures (25) in order to overheat a printing plate (17) fastened against the second side of said honeycomb chase (24).

Description

TOOLS SUPPORTING AND HEAPING DEVICE
The present invention refers to a tools supporting and heating device for tools like printing plates, used for hot embossing andlor diecutting and hot pressure transfer of portions of metallic films, mainly on a paper or cardboard substrate.
Such operations are carried out for example into a machine including a platen press, in which a cardboard sheet is introduced to be printed with related print motifs issued from a usual metallized foil or film conveyed between this sheet and the heated upper platen. The pressure needed for transferring the metallized film on the cardboard sheet is controlled by the lov~ier movable beam of the platen press. This movable beam is usually equipped with a stamping die, to which the counterparts of each plate-shaped tool of the upper beam are secured. These tools are usually defined for the one skilled in the art with the term of printing plates. Thus, in a recurring vertical movement, the lower beam is pressing the counterparts against the related printing plates, by sandwiching the cardboard sheet above which the metaflized foil is arranged. The latter is thus getting directly in contact with the plate heated through the upper beam, the latter enables thus diec~utting and transferring the portion of the metallized foil, corresponding to the printing plate imprint, on the cardboard sheet. Once the transfer is carried out, the lower beam comes down again and the printed cardboard sheet is removed from the platen press so that the latter is free again for a new sheet to be stamped. In the meantime, the stamping foil is unrolled so that a new blank surface is connected with the printing plates. The diecutting and hot embossing process can then be renewed.
To ensure the printing plates setting according to various needs, a relatively thick plate, provided with a plurality of evenly distributed apertures is already in use. Such plates are commonly known under the term of honeycomb chase and are directly secured to the heating surface of the upper beam. The securing of the printing plates on the honeycomb chase is carried out by means of fastening clamps which, from one end, are grasping the edges of the printing plate and, from the other end, are slipping and tightening themselves in the apertures by means of a clamping pin and of an eccentric, for example. Such securing means are described more in details with patent CH691361.

The heating of the printing plates is thus realized through the honeycomb chase, which is itself directly associated with the upper heating platen. The latter, heavy and massive, enables dealing with strong pressures generated by the lower movable platen at the time of the stamping of the metallized foil and even sometimes at the time of a simultaneous sheet embossing operation. The stamping and embossing forces vary according to the whole surface of the patterns to be stamped and can typically range from 1 to 5 MN, for surfaces of worked sheets of about one square meter. The device that enables to heat the honeycomb chase and consequently the secured printing plates is located inside said platen.
Such a-platen usually includes a massive block, interdependent from the machine frame. At least one supporting plate is arranged against the lower surface of said block, in whose thickness a plurality of parallel pipes are machined enabling the fitting of about twenty electric heaters. This supporting plate is furthermore divided into ten areas, so that the heaters located in each area can be independently fed altogether. To that end, an electric supply network takes also place inside the upper beam and is connecting each heaters group to an exterior power input. So that the temperature of the printing plates can register to an optimal value, usually ranging befirveen 50°C and 180°C, the electric board is equipped with a thermostatic regulation device connected to a plurality of temperature sensors. The latter are usually located the closer to the honeycomb chase and distributed according to areas related to the various groups of heaters.
Patent FR2'639'005 refers to a hot gilding device similar to abovementioned one. The heating device of one of the platens comprises six heating units interdependent and separated the ones from the others by spaces of about one millimetre. Each heating unit involves a stacking of various plates.
The honeycomb chase enabling the later securing of the plates is made of an upper plate with a plurality of bored holes. Under said plate, a copper plate is acting as a heat dispatcher. Another plate milled with grooves and provided with the heating resistances is located underneath the latter. This set of plates finally lays on a last one comprising compact plastic leaves in alternation with alveolate leaves. This fast plate constitutes a thermic insulation avoiding the excess of heat dispersion to the rest of the platen.
Such heating devices own many drawbacks that are not enabling the capacities improvement of these machines and make them also not really polyvalent. Among these drawbacks, one will mainly notice the huge thermal inertia of several massive parts of these heating devices decreasing the machine capacities when one needs a quick adaptation to new temperature data. It can be the case, during a same stamping work, when a batch of cardboard sheets is not any more at the Same temperature than the preceding one. The reasons for such a difference of temperature between these two sheets batches being directly related to their storage area, where ambient temperatures were unequal, or being due to a rate increase of the machine.
When processing with cardboard sheets at lower temperature, it will be necessary to compensate for the calorific loss of the printing plates coming in contact with these sheets within the shortest delays. However the thermal inertia of all units comprised in the known heating devices can require not less than ten minutes before the temperature sensors can register the temperature variation. The reacting time for correcting such sudden temperature variations is thus very long compared to the production rate, vvhich can be of about 4000 even 7000 sheets per hour.
Another drawback is that the fitting of known heating devices produces an important heat loss spreading in the important mass of the numerous plates, frames and other metal parts connected to the printing plates.
This heat loss is resulting in an excessive energy cansumption compared to the one just needed for the printing plates to be at their working temperature, which means a relative low output for said devices, inversely proportional to the energy consumption costs.
Another drawback of said devices is the required pre-heating times before being operational. Pre-heating times can sometimes be of about several hours and also prevent from any use of the machine. Moreover, they depend on several variable factors, namely on the initial teri~perature of the plate, on the working temperature of the printing plates, on the conductivity and the mass of used materials. Inversely, the thermal inertia of these materials prevents the machine from fast cooling and makes thus any handling more complicated, like the disassembling of the printing plates followed by the preparation for another work, as long as the temperature has not reached a suitable level.
Another drawback is that the various assembly parts connected to the heating device have to deal with dilatations and other physical constraints.
These dilatations generate on one hand mechanical tensions and, on the other hand, important size changes that have to be imperatively taken into account at the time bf the cold positioning of the printing plates for hot processing.
Another drawback is the required sorting of the heating areas that cannot be reduced or removed. In case only one printing plate infringes on a small portion of an adjacent heating area, it would nevertheless be necessary to control the heating of this whole adjacent area to ensure the temperature homogeneity of said printing plate. This homogenization being indeed necessary to ensure a right transfer on the whole si.arface of the printing plate.
Another drawback is the difficulty for current heating systems to regulate their temperature. The heating areas being relative rough surfaces, it is generally difficult to obtain a satisfactory temperature regulation of the areas located at the edge of the honeycomb chase. Indeed, these peripheral areas are subject matter to a temperature gradient showing a temperature loss of the printing plate as soon as the edge of the heating plate is reached. This loss is produced either naturally by surrounding conditions, where the ambient air is at a quite lower temperature than the one of the printing plates, or artificially by a blower located upstream of the platen press, used to facilitate the stripping of the rest of the metallized foil, once the latter is stamped on the cardboard sheet. Thus, if these areas are located near-by the periphery of the heating plate, their temperature can never be homogeneous. The result will be a real IosS of quality of the transfer of the metallized foil, e~Jen the appearance of some defects on said portions.
Another drawback is that heating systems, tike said ones, are not of easy repair and maintenance. The main units subject matter to breakdowns being electric resistances and temperature sensors. However, if one of those parts should be defect, it would then not be possible any more to use the related heating area and it could in fact paralyse the whale machine if one, or several printing plates, would stay, even partially, in this area.
Another drawback is that an important infrastructure is needed into the platen to heat the printing plates. However, all mechanical and electric embodiments do not enable in such a case the convertibility of that kind of machine into one intended for the cardboard sheets cutting. The cutting stations of a packaging production line are nevertheless, excepted for some modifications, identical to said platen presses of the invention. However, to carry out such a conversion, it is necessary to take out the honeycomb chase from the platens, the printing plates and the other specific tools in order to replace them by suitable tools such as a cutting die, provided with cutting rules and a cutting plate acting as support and counterpart. Since these transformations require sometimes heavy handlings, the machine must be stopped and is thus not productive during that time.
The aim of the present invention is to overcome at least partly the abovementioned drawbacks. To that end, the present invention relates to a fast and convivial adaptability for cutting and stamping machines thanks to a device of a much easier setting and removing from a usual plate. The time needed to carry out these Transformations is thus substantially reduced and the versatility of these production machines is as much improved. It also increases the energetic efficiency of the heating of the printing plates, allows choosing and precisely targeting the various areas to heat, decreasing the necessary heating power and reducing thus the electricity consumption costs. The present invention also offers the possibility, thanks to a self regulation system integrated into each heating device, to not systematically resort to the fitting of temperature sensors inside the heated upper head. Moreover, it reduces considerably the cooling and heating times of the machine, respectively before and after a required work.
These aims are reached thanks to a tools supporting and heating device according to what states claim 1.
The invention will be more clearly understood from the study of an embodiment, given by inray of non-limitative example and illustrated by the following drawings, in which - fig. 1 shows a general diagram of the main parts comprised into a stamping machine equipped with the subject matter of the invention;
- fig. 2 shows schematically and partially a vertical cut of the subject matter of the invention;
- fig. 3 shows schematically and partially a vertical cut of a heating element of the device of the invention;
- fig. 4 shows schematically and partially a vertical cut of an alternative of the device illustrated with fig. 2.
-.fig. 5 shows schematically an alternative of one heating element as illustrated with fig. 4.
Figure 1 shows schematically the main units of a platen press 1 comprising the tools supporting and heating device 2l? of the invention. The platen press 1 includes primarily a fixed upper beam 2 and a vertically movable lower platen 3. At least one metallized film or one metallized foil 4 is conveying between these platens, being unrolled from a roll 5 by a pair of advance shafts 6. Thanks to a plurality of tension rollers 7, this stamping foil is then turning around the fixed upper beam 2. It is tended' by a pair of drive rollers 8 before leaving the machine by means of an idling device 9 and being removed by a pair of brushes 10 towards a collecting pan 11.
Underneath the metallized foil 4, a substrate, such as a cardboard sheet 12 or another material, is laid on the lower platen through a conveyor, for example a gripper bar 13 mounted on a gripper rod chains 14, as partly illustrated. The lower beam 3 is equipped with a stamping die 15 against which at least one counter printing plate 16 is secured.
The tools supporting and heating device 20 of the invention is mounted against the lower side of the upper beam 2, the device being equipped with at least one printing plate 17 intended to be heated. At each platen press cycle, a new sheet 12 is conveyed and positioned by means of the gripper bars 13 on the lower platen 3 equipped with counter printing plates 16.
At the same time, a new portion of metallized foil 4 is unrolled from the roll and stopped in front of the printing plates 17. As soon as the lower platen 3 is raised, the platen press 1 stops, while each counter printing plate 16 comes to encase into the related printing plate 17. The sheet 12 and the portion of the metaflized foil 4 are sandwiched between said two devices and thus strongly compressed the one against the other. This compression strength, to which is added the heat released by the heated printing plate, enables to diecut the imprint of the printing plate 17 into the metaliized foil 4 and to stick this imprint onto the sheet 12 by means of a specific adhesive matter related to each one of the metallized foils. At the time of the aperture of 'the platen press by lowering the lower platen, a blower 18 is insufflating air in order to enabling the stripping of the sheet 12 in comparison to the remaining framework of the metallized foil that deems sometimes to be gluing. The stamped sheet 12 is then withdrawn out of the press by means of the gripper bar 13 and a new cycle can begin.
Figure 2 illustrates with more details the tools supporting arid heating device 20 that enables the securing of the printing plates 17 of the upper beam and the raising of their temperature up td an optimal processing value. Device 20 comprises particularly a first insulating plate 21, which is a bad electricity conductor, even also a thermal insulator, against which supports a bottom plate 22, made of copper for example. An insulating surface 23 with an afi~nost infinite ohmic strength is fastening flat on the front of this plate.
The whole device comprising the insulating plate 21, the bottom plate 22 and the insulating surface 23 constitutes a whole unit and is thus resulting in a unit called base plate 40.~A honeycomb chase 24 is then secured against this base plate 40, more precisely against the insulating surface 23. This chase is absolutely the same as those used for hot stamping operations in the known platen presses. Such a honeycomb chase comprises a plurality of apertures 25, evenly distributed on its whole surface, and owns dimensions appreciably equal to the maximum format of the sheets to be processed into said press. As such a chase is extremely expensive, one will understand that one advantageously does not necessarily need said specific chase in order to implement the subject matter of the invention.
Apertures 25 are preferentially circular shaped and extending right through the thickness of the honeycomb chase 24. A hole 26 bored into the insulating surface 23 is to be seen through each aperture 25, so that it is also possible to see a part of the bottom plate 22. Apertures 25 and holes 26 are preferentially concentric as illustrated on fig. 2. Each aperture 25 can receive an independent heated unit 30, supporting, at least at one of its ends, against the stripped part of the bottom plate 22 and owning, at the other end, a front part intended to come into contact with the back of a printing plate 17, plated and fastened against the external surface of the honeycomb chase 24.
Figure 3 is a diagrammatic illustration of a heating device 30 of device 20 of the invention. Each heating device comprises in particular a cap produced in an insulating material through which the electrical current cannot be conveyed. This cap 31 is crossed by an electrode including primarily a rod 32. One of the end of this rod crosses the hole 26 of insulating surface 23 and comes into contact with the bottom plate 22, as the other end supports a base plate 33 sliding along the vertical axis of the rod. An elastic means, such as a compression spring 34, allows pushing this base plate 33 towards the exterior side of aperture 25, facing the back of the printing plate 17. The compression spring 34 is preferentially interdependent, at its ends, respectively of the interior bottom of cap 31 and of the interior surface of base plate 33. The electric resistance 35 of the heating device 30 is fastened by unspecified means against the exterior side of this base plate. Thanks to said elastic means, this electric resistance 35 remains always plated against the back of the printing plate 17 when the latter is mounted on the honeycomb chase 24. The heating device 30 is expected to come and clip into aperture 25 so that it is easily removable. However, any other fastening means allowing easy setting and removing from aperture 25 is also appropriate.
To more improve the contact of the electric resistance 35 against the back of the printing plate 17, the base plate 33 should be mounted onto a link, such as a pivot, authorizing thus perpendicularity defects between the longitudinal moving axis of the electric resistance 35 along the rod 32 and the plan farmed by the back of the printing plate 17. Such a spherical roller would then take place at the junction of the base plate and the rod and would be, for example, assembled sliding along the latter.
From an electric point of view, the rod 32 and the base plate 33 constitute one of the electrodes of the t~ols supporting and heating device 20, whereas the honeycomb chase 24 and the printing plate 17 constitute the other electrode of said device. The bottom plate 22 is thus connected to the positive polarity of the electric power input and the honeycomb chase 24 is connected to the negative polarity so that the visible parts of the electric board, such as the chase and the printing plate, are connected to the mass and thus do not present any electrocution danger when the device is under electric tension.
One understands thus the insulating plate 21, the insulating surface 23 and the insulating cap 31 acting to electrically separate the bottom plate 22 from all other parts of the device 20 connected to the mass ~af the platen press 1.
Since the source of electric power of the present invention is not specifically concerned, it will thus not be described with more details. In the same way, the network of electric wires enabling the connection of the bottom plate 22 and the honeycomb chase 24 with the respective terminals of the electric input is not of specific use here. One will however mention that these connections are usefully achievable in a very simple way, as the bottom plate and the honeycomb chase are of easy access, particularly from the outside. One will however note that the device 20 of the invention advantageously does not comprise any network of internal conducting wires for the feeding of its own electric means.
The fastening of the printing plates 17 is carried out by means of fastening clamps into some selected apertures of the honeycomb chase, at the edge of the printing plate 17. For reasons of clearness, these fastening means are simply not represented on fig. 2. However, one will note that the device of the invention allows advantageously keeping this fastening means of the printing plates. There is thus no constraint for the user to invest for a specific fastening means for the device of the invention.
Advantageously, the electric resistances 35 can be, for example, ceramics chips like those of heating glue guns used in the field of the building industry. They are thus to be easily found in retail shops. These chips are generally of various types, each one corresponding to a different ohmic strength. The device of the invention can thus advantageously be equipped with different electric resistances 35, according to the job specificity to be achieved within the platen press. It is thus also possible to have at the same time, into device 20, several chips of different ohmic strength s. It would thus become possible to more heat a part of one printing plate compared to another one or compared to the rest of the printing plate, for example.
Advantageously, the device of the invention allows to arrange at one's will the heating devices 30 on the whole surface of the chase 24, and more judiciously to arrange them at least inside the areas covered by the printing plates 17. Thus, only the latter and their respective covered areas will really be heated by the heating devices 30. Moreover, one will note that the chips forming the electric resistances 35 are directly connected to the printing plate 17. The result being thus a quite important sawing of energy.
More advaritageously, some kind of these electric resistances could own ~a capacity of inherent regulation for each one of said chips. These chips could have indeed a chemical structure whose ohmic strength varies according to the variation between the real temperature of the chip and a related maximum temperature. So the regulation of the electrical current consumed by each resistance would be automatically and independently carried out until the chip reaches the maximum reference temperature for which it was designed.
Thus, the heating devices 30 located near-by the blower 18 would automatically absorb more electrical current than those located more in the middle of the honeycomb chase, so as to compensate for the loss of heat produced by the air volume displacement of the blower. Thanks to this local compensation, which could sorrietit'nes even be specific, a printing plate 17 located in front of the blower 18 could thus be almost uniformly heated to a reference value. Lastly, one will note that, with this kind of chips, it would not be necessary any more to systematically deal with temperature sensors for checking the regulation of the various heated areas.

When one has to convert a platen press initially intended for the diecutting to a platen press 1 intended for the stamping of metallized foils, one notes, on the one hand, that the tools supporting and heating device 20 of the present invention comprises only a few parts and, on the other hand, that the latter are almost looking all like plates and can be very easily assembled against the plain upper.piaten of any kind of platen press. Inversely, the disassembling of the device 20 so as to equip the platen with diecutting tools for cardboard sheets is as easier to deaf with.
Figure 4 illustrates an alternative of the preferred embodiment of the invention. This alternative consists in using a base plate 40 comprising a plurality of indissociable successive layers, insulating 41 and conducting 42, instead of the insulating plate 21, of the base plate 22 and of the insulating surface 23. Such plates are known under the name of mufti-layer printed circuits and are commonly used in the field of electronics and data processing for the embodiment of electronic boards, such as graphics cards, mother boards or extension cards for example. Used as a support, these multilayer circuits are thus like a milfoil of conducting and insulating layers onto which electronic components are usually wired.
Such a multilayer circuit is of an advantageously very light and very thin use and usually comprises at least three conducting layers 42, separated the ones coriipared to the others by interconnected insulating layers 41. One although deals with common printed circuits comprising up to 16 electric layers, even sometimes 22 layers for some special applications. While having for example three conducting layers, it is then possible to apply simultaneously to this printed circuit two different electric voltages. One of these voltage, of about 230V for example, can be used to convey the energy needed for the various electric resistances 35, whereas the second voltage, of about approximately 5V, can be used to convey a pilot signal for the reference temperature of said electric resistances for example. In order to control some resistances 35 independently from the others, it is also possible, either to foresee a division of the conducting layer intended for the low voltage, or to increase as much as necessary the number of layers each one intended for conveying an independent low voltage signal. One will also note that, in the case of a printed circuit made of three conducting layers, the third layer will be connected to the ground (potential OV) and dedicated to the way back for the electric currents travelling through the two other conducting layers. So that the electric current can be conveyed to the surface, from the various internal conducting layers 42 towards external surface contacts 44, the electronic cards are usually equipped with connectors 43, like small insulated metallic rivets that are crossing all upper conducting layers, without producing any electric contact, until they reach their final layer to which they are electrically and mechanically connected with a welding 45.
It becomes thus possible to obtain on the surface of the rnultilayer printed circuit several contacts 44, of different voltages, which can be easily used to feed all types of electric units or electronic devices. Such units and/or devices can perfectly be comprised in an alternative of the heating device 30.
This alternative is schematically illustrated on fig. 5 by another heating device 30 intended to be used with a base plate 40, preferE:ntially made up of three conducting layers 42, and of as many contacts 44 on its surface. The heating device 30 comprises an insulation envelope 51 similar to the cap 31 illustrated with fig. 3. Inside said envelope 51 is an insulating blanket 52 comprising the main requested devices, namely a piston 53 moved by an elastic actuator 54 such as a compression spring, an electric resistancf: 35, a conducting hood 55 and an electronic device 56 taken as a measuring component such as a temperature sensor for example. The electric resistance 35 is connected to an average voltage source by means of a first electrode 61 intended to be connected to one of the contacts 44 whose potential is equivalent to the voltage of 230V for example, and by means of a second electrode 62 intended to be connected to a second contact 44 whose potential i s equivalent to a negative voltage for example. A third electrode 63, intended to be connected to the last contact 44, enables tha electronic device 56 to be under a low voltage, of 5V
for example, thanks to the difference of voltage between the second and the third electrode. Electrodes 61, 62 and 63 are evenly distributed around the insulating blanket 52 and cross the latter by means of passages 57, so as to be connected to the appropriate electric device or electronic component. Once this heating device inserted into one of the apertures 25 of the honeycomb chase 24, the free ends of each electrodes 61, 62, 63 come to connect themselves with the respective contacts 44 of the base plate 40. The electric and electronic devices comprised into the heating device can then be correctly fed.
One will note that for the abovementioned alternative of the heating device 30, the piston 53 is preferentially made up of an insulating matter.
However, it would be perfectly possible to remove the electrode 61 so as to convey the electrical current by the combination of an elastic actuator 54, acting Pike a spring, and of a piston 53, both conducting. The electronic device 56 shown as an example illustrated with fig. 5, is arranged inside the piston 53.
However, it could be planned to remove it preferentially into another housing, inside the cap 55 for example. One notes thus that several alternatives are perfectly suitable, as much mechanically speaking ass electrically speaking.
Related to that point, one will also mention that the cap 55 is acting here for doubling the contact surface of the electric resistance 35, improving thus the heat distribution against the printing plate 17, while keeping this chip save inside the envelope 51. This cap 55 can as well be produced in a matter such as copper or mica, so far as this matter owns a good thermic conductivity.
However, it could be also deemed to remove this cap 55 or to simply substitute it by the electronic measuring device 56. It is quite clear that the number of electrodes planned in said alternative of the heating device 30 could be different so as to obtain either an improvement of said element or a simplification of its process for example.
Thanks to the abovementioned alternatives for the present invention, it is even possible to substitute the conducting honeycomb chase 24 by a same or identical one but produced thanks to an insulating matter.
Indeed, one notes that the electric circuit of the heating device 30, as shown by the various electrodes 61, 62, 63, do not require anymore to deal with a honeycomb chase made of a conducting material. Another advantage is thus directly resulting from the appreciable reduction of the mass of such a frame.
Its handlings are thus easier, faster and can even be carried out manually without needing a lifting apparatus.

Claims (15)

1. Tools supporting and heating device (20) for tools like printing plates, used for hot embossing and/or diecutting and hot pressure transfer of metallic film portions (4) on a substrate (12) into a machine (1) equipped with at least one platen (2) and with at least one honeycomb chase (24) defining two parallel sides covered by a plurality of apertures (25}, characterized in that it includes a base plate (40) secured against one of the sides of the honeycomb chase (24) and made of an alternation of at least one insulating surface (21, 23, 41) and at least one conducting surface (22, 42, 44) enabling to feed at least one heating device (30) being insertable inside each one of said apertures (25) in order to overheat a printing plate (17) secured against the second side of said honeycomb chase (24).

2. Device (20) according to claim 1, characterized in that the base plate (40) comprises a conducting bottom plate (22) against whose sides an insulating plate (21), respectively an insulating surface (23) bored with a plurality of holes (26) are fastened, facing said apertures (25) of the honeycomb chase (24).

3. Device (20) according to claim 2, characterized in that the heating device (30) includes an insulating cap (31) covered with an electrode (32) one of whose ends is leaning up against the bottom plate (22), through aperture (26), and whose other end (33) is equipped with an electric resistance (35) intended to come in contact with the printing plate (17) secured against one of the sides of said honeycomb chase (24).

4. Device (20) according to claim 3, characterized in that said other end of electrode (32) comprises a base plate (33) conveyed towards the exterior edge of aperture (25) through an elastic means (34).

5. Device (20) according to claim 4, characterized in that said base plate (33) is mounted on a link.

6. Device (20) according to claim 2, characterized in that said bottom plate (22) is connected to the positive terminal of an electric energy input and in that the honeycomb chase is connected to the negative terminal of same said input.

7. Device (20) according to claim 1, characterized in that the base plate (40) owns a multi-layer printed circuit (41, 42, 44) including a plurality of connectors (43) arranged right to the apertures (25) of the honeycomb chase (24).

8. Device (20) according to claim 7, characterized in that the heating device (30) includes an envelope 51 inside which a plurality of electrodes (61, 62, 63) are arranged,. whose one end is connected to one of the polarities of at least one electric device and/or at least one electronic body (56) and whose other ends are each one intended to come into contact with one of the connectors (43) of the base plate (40).

9. Device (20) according to claim 8, characterized in that at least one of said electric devices is an electric resistance (35).

10. Device (20) according to claims 3 and 9, characterized in that said electric resistance (35) of the heating device (30) consists of a chip whose chemical composition owns an ohmic strength variable according to the difference between the real temperature of the electric resistance (35) and a maximum control temperature.

11. Device (20) according to claim 8, characterized in that said electric and/or electronic devices and said electrodes (61, 62, 63) are interdependent of a piston (53) connected to an elastic actuator (54) and sliding along a blanket (52) arranged inside the envelope (51).

12. Device (20) according to claim 11, characterized in that the elastic actuator (54) consists of one of said electrodes (61, 62, 63).

13. Device (20) according to claim 7, characterized in that the honeycomb chase (24) is made of an insulating matter.

14. Device (20) according to claim 7 characterized in that said heating devices (30) are removable and clipped into the apertures (25) of the honeycomb chase (24).

15. Device (20) according to claim 1, characterized in that said machine (1) is a platen press initially intended for diecutting and/or embossing of a substrate (12).