WO2008051112A1 - Method for applying an image to a sheet material by stamping (variants), a calender press for carrying said method (variants) and a product obtained according to said method using the calender press (variants) - Google Patents

Abstract

The invention relates to mechanically processing sheet or coiled or laminated material, in particular to stamping methods and means. The inventive method for producing a photograph-like image on metal paper or metallised material in such away that demi-tints are transmitted and the image is securely protected against counterfeit, consists in applying an image by means of a calender press, the working surface of one of the rolls of which or the working surfaces of the both rolls of which are provided with rows of projections, in forming a relief surface, the shape and the variable depth of which are determined by the reproducible original of the image according to the optical density of corresponding areas of the reproducible image, on one of the rolls by engraving and removing the material of projections within the limits of the height thereof, and in producing a like-photograph image which is differently ('negative' or 'positive') perceivable according to a visual angle, and/or the type and/or the position of a light source. The variants of the embodiment of the method and the calender press are also disclosed.

Description

 The method of applying the image to the sheet material by embossing (options), the calender for its implementation 5 (options) and the product obtained in this way using the calender (options)

FIELD OF THE INVENTION

The invention relates to the field of mechanical processing of sheet or roll, including layered material, namely, to methods and means of mechanical deformation without removing material, for example, methods and means used for embossing.

State of the art

15 A device for stamping foil is known (US 6,715,411, B 31 F

1/07, 2004). The device comprises a bed with a drive shaft fixed to it, having a grooved surface with mutually intersecting rows of alternating recesses and protrusions, tapering from the base to the top, the drive of the drive shaft and

20 attached to the frame, at least one driven shaft having a grooved surface with mutually intersecting rows of alternating recesses and protrusions, tapering from the base to the top and arranged to interact with an adjacent corrugated surface of the drive shaft

25 This technical solution does not provide images such as photographs on the processed material.

The closest analogues of the claimed inventions are the method, device and embossed layered products described in patent RU 2227095, B31F 1/07, 1998. The method is intended for the production of embossed sheet material containing at least two layers interconnected. The method involves performing an ornament pattern by embossing a first layer on which a general background pattern is previously applied, wherein the ornament pattern is formed by protruding sections that are larger and distributed with a lower density compared to the protruding sections making up the overall background pattern.

Known analogues, including the closest one, do not provide exact copying of an image (for example, a type of photograph) on a sheet material (strip, tape) made of foil or layered material, the outer layer of which is made of metal. The closest analogue only allows you to get an image of the ornament by creating, on a uniform overall background, larger protrusions in width or height formed by embossing. The transmission of halftones with different levels of gray, in particular, when stamping on foil, known methods can not provide.

Disclosure of invention

The problem to which the claimed invention is directed is to develop an effective and economical method and means for creating an image such as a photograph by embossing foil or metal coated laminate, used, in particular, as a packaging element in the tobacco and food industries.

In addition, the task is to create an embossed product with an image on it like a photograph, which has a high degree of protection against counterfeiting.

The problem is solved due to the fact that when implementing the claimed method of applying an image that creates the image of the copied original (pictures, photos) with the transmission of halftones, an image is applied to a strip or strip of foil or laminate with a metal outer layer using a calender having a driving and at least one driven shafts, on the working surface of one of which or on the working surfaces of both shafts, rows of protrusions are made, while on one the shaft is engraved to remove the material of the protrusions (along a curved surface or plane) within their height, a relief surface is made, the shape and variable depth of which are set in accordance with the original to be copied expression, and the depth of the relief surface at the places of removal of the material of the protrusions, depends on the optical density of the corresponding sections of the copied image and lies in the range from the value corresponding to the location of the base of the protrusion, to zero, corresponding to the location of the tip of the protrusion, with a variable depth being processed on the material stamping, providing the effect of simulating different levels of gray, in accordance with the darker or brighter places of the original sections of the copier image, with the creation of an image similar to a photograph, differently ("negative" or "positive") perceived depending on the viewing angle, and / or on the type and / or on the position of the light source.

In this case, the protrusions of the shafts in the preferred embodiment are made tapering from the base to the top. The vertices of the projections of the surface of the shafts can be made with a horizontal or inclined platform for blunting. At one of the shafts of the blunt pad, at least part of the protrusions can be made of different sizes. Alternating protrusions may have a pyramidal shape or a truncated pyramid shape. The method can also be carried out using a calender containing at least two embossing shafts, one of which is connected to the drive, and on the working surface of the first of the calender shafts there are rows of recesses, and on the working surface of the second shaft there are rows of mating protrusions, or the working surface of the second shaft is made of cylindrical shape from an elastic material, while on the first shaft, a relief surface, shape and variable depth are made by engraving with removal of the shaft material within the depth of the recesses and which are set in accordance with the original image to be copied, and for performing a variable embossing depth on the processed material, the depth of the embossed surface at the places of removal of the shaft material depends on the optical density of the corresponding sections of the copied image and lies in the range corresponding to the location of the lower point of the recess , to a zero value corresponding to the outer surface of the shaft, and in areas of the relief surface located above the recesses, the relief surface is equal to the depth specified by the shape of the recess, which together provides the effect of simulating different gray levels determined by the optical density of the corresponding sections of the original of the copied image, with the creation of an image similar to a photograph, perceived differently depending on the viewing angle, and / or view, and / or from the position of the light source, the recesses are made tapering with a maximum area on the working surface of the shaft. In accordance with this variant of the method, the lower part of the recesses can be made with a horizontal blunt pad. In addition, the lower part of the recesses can be made with an inclined blunt pad. Or platforms blunting recesses can be performed with different sizes of areas. The recesses and protrusions can also be made pyramidal or in the form of a truncated pyramid. Or, recesses and protrusions can be made conical or in the form of a truncated cone.

The problem for the device intended for the implementation of the above method is solved due to the fact that the device is a calender for applying the image on a flat (strip or tape) material by embossing contains a frame, a drive shaft fixed to the frame, having a surface with rows of protrusions, a drive of the drive shaft and mounted on the frame, at least one driven shaft, also having a surface with rows of protrusions made with the possibility of interaction with the protrusions of the drive shaft, while on one and the calender shafts by engraving with removal of the material of the protrusions within their height, a relief surface is made, the shape and depth of which are set in accordance with the optical density of the portions of the copied original photograph or other image, and the depth of the relief surface in the portions of the protrusions is made varying from the maximum value, corresponding to the location of the base of the protrusion to a zero value, corresponding to the location of the top of the protrusion (in special cases, the tip, the site is blunt ia), to obtain a variable embossing depth on the processed material, which provides the effect of simulating different gray levels with the creation of an image similar to a photograph, perceived differently depending on the viewing angle and / or on the type and / or position of the light source (" positive ”,“ negative ”).

A possible embodiment of the projections of the shafts is described above. According to another embodiment, the calender comprises a bed fixed to the bed, at least two embossing shafts, one of which is connected to the drive, and on the working surface of the first of the calender shafts, driven or non-driven, rows of recesses are made, and on the working surface of the second shaft - rows of reciprocal protrusions, or the working surface of the second shaft is made of a cylindrical shape from an elastic material, while on the first shaft engraving with removal of the shaft material within the depths of the recesses is made relief the surface, the shape and variable depth of which is set in accordance with the original image to be copied, and to perform on the processed material a variable embossing depth, the depth of the relief surface at the places of removal of the shaft material is made depending on the optical density of the corresponding sections of the copied image and lies in the range corresponding to the location of the lower point of the recess, to zero, corresponding to the outer surface of the shaft, and in areas of the relief surface located above the recesses, the depth of the relief surface is equal to the depth specified by the shape of the recess, which together provides the effect of simulating different gray levels determined by the optical density of the corresponding sections of the original of the copied image, with the creation of an image similar to a photograph, perceived differently depending on the viewing angle , and / or from the view and / or from the position of the light source. The shape of the recesses and protrusions may be different, in particular as described above for the second embodiment of the method.

Obtained as a result of the implementation of the method or operation of the calender, a product protected from counterfeiting - a strip or tape made of foil or a laminate with a metal coating, has an embossed image that is a copy of a photograph (or other image) and looks like the original with different levels of gray, transmitting white, black colors, including the tones of the original.

The technical result from the use of the invention is to ensure that the image is applied to the material in the form of a strip or tape by the embossing method and to obtain an embossed product onto which the image is copied, the perception of which is caused by the effect of simulating different gray levels, determined by the optical density of the corresponding sections of the original of the copied image. As a result, an image similar to a photograph is received on the product, which is perceived differently depending on the viewing angle and / or on the type and / or on the position of the light source. Also, the technical result is that the image obtained on the foil or metallized material has a high degree of protection against counterfeiting. The achievement of this result is due to the fact that it is impossible to copy the resulting image from the finished product (sheet material - foil or layered metallized material) with the required accuracy due to the complex shape of the obtained embossing surface and, accordingly, it is impossible to produce a calender shaft that accurately reproduces the same image. Reproduction by embossing an identical image is possible only if the original image is used in the manufacture of the calender shaft.

A foil with an image deposited on it, obtained by the claimed method using the proposed calender, may in particular, used for tobacco products as an element of their packaging, providing a high degree of protection against counterfeiting.

The implementation of the invention The method is carried out by means of an embossing device - calender, which contains a frame on which the drive is mounted and at least two embossing shafts. One of the drive shafts is connected to the drive, one, two or more driven shafts rotate when interacting with the drive shaft. The interaction of the calender rolls, providing an image on the material in the form of a strip or tape by embossing, can be carried out as follows.

Firstly, the driving and driven (driven) shafts can enter into mutual engagement by means of protrusions made on their working surfaces. The protrusions of the first shaft are located in the space ("depression", "cell"), formed by the intersection of the side surfaces (or flat, or conical, or cylindrical or other forms) of adjacent protrusions of the working surface of the second shaft. At the same time, at least part of the protrusions of the first shaft has a different geometric shape than the protrusions of the second shaft that enter into engagement with them.

Secondly, the working surface of the second shaft can be made with recesses under the protrusions of the first shaft. The engagement of the shafts in this case occurs due to the placement of the protrusions of one shaft in the recesses of the other.

Thirdly, the working surface of the first shaft can be performed with protrusions, and the working surface of the second shaft can have a cylindrical shape. In this case, the material from which the work surface is made the second shaft, must have elasticity, due to which (in the presence of a radial force pressing the shafts), torque is transmitted from the drive shaft to the driven shaft, and, accordingly, the feed of the processed material, as well as the embossing process. Fourth, the working surface of the first shaft can be made with recesses, and the working surface of the second shaft can have a cylindrical shape. In this case, as in the case described above, the material from which the working surface of the second shaft is made must have elasticity, which ensures the transmission of torque from the drive shaft to the follower, the supply of the processed material and embossing.

In any of the four options described, it does not matter which of the shafts is the lead, and which (which) is the follower (s). To create an embossed image on the processed material, the following shaft interaction options are possible:

- option "shaft with hoses" - "shaft with hoses";

- the option “shaft with holes” - “shaft with holes));

- option “shaft with protrusions)) -“ shaft with an elastic cylindrical surface)). The copied image is applied to one shaft having projections (it does not matter the master or slave). To do this, engraving removes the material of the protrusions within their height, due to which a relief surface is formed on the shaft, the shape and depth of which is specified by the original image (original). When performing a embossed surface on the shaft surface, the processing depth at the places of removal of the shaft material (shaft protrusions) changes from minimum to maximum depending on the optical density of the corresponding sections of the copied image (depending on the gray level on the original - practically, from “white” to “black”). This provides a variable embossing depth on the processed material, which, in turn, creates the effect of simulating different levels of gray on the embossed product with the creation of an image similar to a photograph. The image obtained on the embossed product is perceived as “negative” or “positive” depending on the viewing angle and / or on the type and / or position of the light source.

The depth of the embossed surface of the shaft on the area per projection lies in the range from the value corresponding to the location of the base of the protrusion, to a zero value corresponding to the location of the top of the protrusion. The maximum depth of the embossed surface at the places of removal of the material of the protrusions corresponds, for example, to “black” in the original image, the minimum depth to “white”. It can be done differently: the maximum depth of the embossed surface corresponds to “white” in the original image, the minimum depth to “black”. This is allowed due to the fact that, as mentioned above, on the finished product, the perception of the embossed image as “negative” or “positive” depends on the angle of view, on the location of the light source. In some sections of the shaft, the depth of the embossed surface does not depend on the optical density of the original image. This is due to the fact that when processing the surface of the shaft, the tool can only carry out sampling if the processing zone is on the material of the projections. If the surface of the protrusion in any processing zone is lower than specified by the optical density of the original image, the tool passes higher, material is not removed, and the depth of the relief surface in this place is equal to the depth of the protrusion surface. In the extreme case AND

the depth of the relief surface is maximum and is at the level of the base of the protrusion, regardless of the gray level on the original.

The shape of the initial protrusions of the shaft (before the embossed surface is made on it) may be different. As a rule, the protrusions are made tapering from the base to the apex and have the shape of a pyramid, a truncated pyramid (straight or inclined section), a cone, a truncated cone (straight or inclined section), a tetrahedron, a truncated tetrahedron (straight or inclined section), a polyhedron, a truncated polyhedron (straight or inclined cut), etc. The reciprocal recesses of the other shaft for the variant “shaft with protrusions and embossed surface” - “shaft with recesses)) have a similar shape, but there is no relief surface on the shaft with recesses.

In special cases, the execution of the tops of the projections of the surface of the shafts can be made either pointed, or with a horizontal area of blunting, or with an inclined platform of blunting. The areas for dulling the protrusions of one of the shafts can be made with different sizes of areas.

In addition to the above-described variant of the method in which the original image is copied onto a shaft having protrusions, an embodiment of the method is possible in which the image from the original is copied onto a shaft having recesses. The following shaft interaction options are possible:

- option "shaft with grooves)) -" shaft with protrusions));

- option “shaft with recesses)) -“ shaft with an elastic cylindrical surface)).

For the listed options, the copied image is applied to one shaft having recesses (it does not matter the master or slave). By engraving remove the material of the shaft between the recesses with the formation of a relief surface, the shape and variable depth of which are set in accordance with the copied original image. The maximum depth of the relief surface at the points of removal of the protrusion material may correspond, for example, to “black” on the original image, the minimum depth to “white”, or vice versa, as indicated above.

The depth of the embossed surface at the places of removal of the material of the shaft depends on the optical density of the corresponding sections of the copied image and lies in the range from the value corresponding to the location of the lower point of the recess to zero, corresponding to the external (working) surface of the shaft.

In areas of the relief surface that fall on the area above the recesses, the depth of the relief surface is equal to the depth specified by the shape of the recess, and does not depend on the optical density of the original image. This is because when copying the original image onto the shaft, the tool, the movement of which depends on the optical density of the original, can pass over the recess (“hollow”) and not affect the material of the shaft.

Grooves on the shaft can be made of various shapes. As a rule, they are performed tapering in the direction of the axis of rotation of the shaft, i.e. with a maximum cross-sectional area located on the working surface of the shaft. The lower part of the recesses can be made either pointed, or with a horizontal area of blunting, or with an inclined platform of blunting. The areas for blunting the recesses can be made with different sizes of areas.

The recesses (before the embossed surface is carried out on the shaft) can take the form of a pyramid, a truncated pyramid (straight or inclined cut), a cone, a truncated cone (straight or inclined cut), a tetrahedron, a truncated tetrahedron (straight or inclined cut), a polyhedron, a truncated polyhedron (straight or inclined cut), etc. The reciprocal protrusions of the other shaft for the “shaft with recesses and embossed surface)) -“ shaft with recesses ”have the same shape, but there is no relief surface on the shaft with the protrusions.

The implementation of the claimed method and the operation of the calender is as follows. Between the working surfaces of the driving and driven shafts, the edge of the sheet material to be embossed is wound - a strip, a tape (for example, foil or foil material). With the above-described embodiments of the method and the device, the kinematic link for transmitting the moment of force from the drive shaft to the follower is either the tops of the protrusions or indentations, the calender provides embossing due to plastic deformation of the sheet material with various surface shapes of the protrusions, the material of which can be removed along the plane or curved surface of any curvature, or recesses. In the process of rotation by the drive, the working surface of the drive shaft in cooperation with the working surface of the driven shaft is subjected to plastic deformation of the sheet material, including in the area of the relief surface, with the formation of a microrelief corresponding to the shape, size and location of the protrusions and / or recesses, including in place the location of the embossed surface.

The tops of the protrusions and / or grooves of the shafts can be made with a horizontal or inclined blunt pad. The dulling areas can have different sizes of the area, which provides additional visual effects on the surface of the material due to changes in the reflectivity of the surface.

The relief surface on the shafts with protrusions or recesses can be obtained by any known method. Example. The processed workpiece shaft using the drive of the feed mechanism is fed into the working area to the drive working body. The drive motor on the working body rotates the knife shaft or cutter or the laser head is turned on.

The blade shaft rotates at a high angular speed (several thousand revolutions per minute). Drives of horizontal, vertical and angular displacements of the working body, controlled by signals from a programmable logic controller through a computer, move the working body according to the program in horizontal, vertical and angular directions, also the feed drive (rotation) of the processed shaft is controlled from the computer.

Thus, a relief surface with an unlimited number of images can be formed.

The embossed surface can also be obtained using electrochemical processing.

Claims

Claim 1. The method of applying the image to the material in the form of a strip or tape by the embossing method, namely, that the image 5 is applied using a calender containing at least two embossing shafts, one of which is connected to the drive, while on the working surface rows of protrusions are made on the first calender shaft, rows of protrusions are also made on the working surface of the second shaft, which mesh with the protrusions of the first shaft, and at least some of the protrusions of the first shaft have a different geometric shape than the protrusions cerned shaft or the working surface of the second shaft is provided with recesses for the projections of the first shaft or the second shaft working surface is cylindrical from an elastic material, characterized in that the first shaft with an engraving 15, by removing material of the protrusions within their height, a relief surface is made, the shape and variable depth of which are set in accordance with the original image to be copied, and to perform on the processed material a variable embossing depth, the depth of the relief surface in the places of material removal 20 protrusions, depends on the optical density of the corresponding sections of the copied image and ranges from a value corresponding to the location of the base of the protrusion, to a zero value corresponding to the location of the top of the protrusion, and in the areas between the protrusions the depth of the relief surface does not 25 depends on the optical density of the original image and is located at the level of the surface of the protrusion, not lower than its base, which together provides the effect of simulating different gray levels determined by the optical density of the corresponding sections of the original copied image, with the creation of an image similar to a photograph, differently perceived depending on the viewing angle, and / or on the type and / or on the position of the light source. 2. The method according to p. 1, characterized in that the protrusions of the shafts 5 are made tapering from the base to the top. 3. The method according to p. 2, characterized in that the tops of the protrusions of the surface of the shafts are made with a horizontal blunt pad. 4. The method according to p. 2, characterized in that the tops of the protrusions on the surface of the shafts are made with an inclined blunt pad. 5. The method according to paragraph 3 or 4, characterized in that the platform for blunting the protrusions of one of the shafts is made with different sizes of areas. 6. The method according to p. 2, characterized in that the alternating 15 recesses and protrusions are made pyramidal. 7. The method according to p. 2, characterized in that the alternating recesses and protrusions are made conical. 8. A calender for applying an image onto a flat material by embossing, containing a bed and at least two embossing shafts, one of which is connected to the drive, while on the working surface of the first calender shaft there are rows of protrusions on the working surface of the second shaft also made rows of protrusions that engage with the protrusions of the first shaft, and at least part of the protrusions of the first shaft has a different geometric shape, 5 than the protrusions of the second shaft, or the working surface of the second shaft is made with recesses d protrusions of the first shaft or the second working surface is formed of a cylindrical shaft of an elastic material, characterized in that the first shaft of the calender engraving with the removal of the material of the protrusions within their height, a relief surface is made, the shape and depth of which are set in accordance with the optical density of the portions of the copied original image, and for execution on the processed material 5. the depth of the embossed surface in the areas corresponding to the protrusions is variable from the maximum embossing depth, and is made from a maximum value corresponding to the location of the protrusion base to a zero value corresponding to the location of the protrusion tip, and in the areas between the protrusions the depth of the embossed surface does not depend on the optical density of the original image and is at the surface level not lower than its base, which together provides a variable embossing depth with effect of simulating different levels of gray and creating an image like a photograph in different ways 15 perceived depending on the viewing angle, and / or on the type and / or on the position of the light source 9. The calender according to claim 8, characterized in that the protrusions of the shaft or shafts are made tapering from the base to the top. 10. The calender according to claim 8, characterized in that the protrusions of the shaft or 20 shafts are made with a horizontal blunt pad. 11. The calender according to claim 8, characterized in that the protrusions of the shaft or shafts are made with an inclined blunt pad. 12. The calender according to paragraph 10 or 11, characterized in that the platform for blunting the protrusions of one of the shafts is made with 25 different sizes of areas. 13. The calender according to claim 8, characterized in that the recesses and protrusions are made pyramidal. 14. The calender according to claim 8, characterized in that the recesses and protrusions are made conical. 15. An embossed product, which is a foil or layered material, with the image made on it, characterized in that 5 that the image has a view similar to a photograph and is created by various gray levels, while the image on the product is obtained by the method according to one of paragraphs 1 to 7. 16. An embossed product, which is a foil or layered material, with an image made on it, characterized in that the image has a look similar to a photograph and is created by different levels of gray, while the image on the product is made using the calender described in one of paragraphs 8-14. 17. The method of applying the image to the material in the form of a strip or tape by stamping, which consists in the fact that the image 15 is applied using a calender containing at least two embossing shafts, one of which is connected to the drive, and on the working surface of the first of the calender shafts there are rows of recesses, and on the working surface of the second shaft there are rows of mating protrusions, or the working surface of the second shaft made 20 of a cylindrical shape made of elastic material, characterized in that on the first shaft, a relief surface is made by engraving with removal of the shaft material within the depth of the recesses, the shape and variable depth of which are set in accordance with the original image to be copied, and for execution on the processed 25 material of variable embossing depth, the depth of the embossed surface at the places of removal of the material of the shaft, depends on the optical density of the respective sections of the copied image and lies in the range corresponding to the location of the lower point of the recess, to a zero value corresponding to the outer surface of the shaft, and in areas of the relief surface located above the recesses, the depth of the relief surface is equal to the depth specified by the shape of the recess, 5 that together provides the effect of simulating different gray levels, determined by the optical density of the corresponding sections of the original of the copied image, with the creation of an image similar to a photograph, perceived differently depending on the viewing angle and / or on the type and / or position of the light source . Yu 18. The method according to p. 17, characterized in that the recesses are made tapering with a maximum cross-sectional area located on the working surface of the shaft. 19. The method according to p. 18, characterized in that the lower part of the recesses is made with a horizontal blunt pad. 15 20. The method according to p. 18, characterized in that the lower part of the recesses is made with an inclined blunt pad. 21. The method according to paragraph 19 or 20, characterized in that the platform for blunting the recesses is made with different sizes of areas. 20 22. The method according to p. 18, characterized in that the recesses and protrusions are made pyramidal or in the form of a truncated pyramid. 23. The method according to p. 18, characterized in that the recesses and protrusions are made conical or in the form of a truncated cone. 24. A calender for applying an image onto a flat material 25 by an embossing method containing a bed, at least two embossing shafts mounted on the bed, one of which is connected to the drive, and on the working surface of the first of the calender shafts, driven or non-driven rows of recesses and on the working surface of the second shaft — rows of reciprocal protrusions, or the working surface of the second shaft is made of a cylindrical shape made of elastic material, characterized in that on the first shaft, a relief surface is made by engraving to remove the material of the shaft within a depth of 5 recesses, the shape and variable depth of which are set in accordance with a copy of the original image, and to perform on the material being processed a variable embossing depth, the depth of the embossed surface at the points of removal of the shaft material depending on the optical density of the corresponding sections of the copied image and lies in the range from the value corresponding to the location of the lower point of the recess to a zero value corresponding to the outer surface of the shaft, and in the areas of the relief surface located above the recesses, the depth of the relief surface is not 15 depends on the optical density of the original image and is equal to the depth specified by the shape of the recess, which together provides the effect of simulating different gray levels determined by the optical density of the corresponding sections of the original of the copied image, with the creation of an image similar to a photograph, perceived differently 0 depending on the angle observation, and / or from the view and / or from the position of the light source. 25. The calender according to claim 24, characterized in that the recesses are made tapering, ^' wherein the maximum cross-sectional area of the recess is located on the surface of the shaft. 25 26. The calender according to claim 24, characterized in that the recesses of the first shaft and the reciprocal protrusions of the second shaft are made with a horizontal blunt pad. 27. The calender according to claim 24, characterized in that the recesses of the first shaft interacting with the second shaft having a cylindrical working surface are made with a horizontal blunt pad. 5 28. The calender according to claim 24, characterized in that the recesses on the working surface of the first shaft and the reciprocal protrusions of the second shaft are made with an inclined blunt pad. 29. The calender according to claim 24, characterized in that the recesses on the working surface of the first shaft interacting with the second shaft having a cylindrical working surface are made with an inclined blunt pad. 30. Calender according to any one of paragraphs 26 to 29, characterized in that the blunt pad is made with different sizes of squares. 15 31. The calender according to claim 24, characterized in that the recesses of the first shaft are made pyramidal or in the form of a truncated pyramid. 32. The calender according to claim 24, characterized in that the recesses of the first shaft and the mating protrusions of the second shaft are made 20 pyramidal or in the form of a truncated pyramid. 33. The calender according to claim 24, characterized in that the recesses of the first shaft are made conical or in the form of a truncated cone. 34. The calender according to claim 24, characterized in that the recesses of the first shaft and the mating protrusions of the second shaft are conical 25 or in the form of a truncated cone. 35. An embossed product, which is a foil or layered material, with an image made on it, characterized in that the image has a view similar to a photograph, and created different levels of gray, while the image on the product is obtained by the method according to one of paragraphs 18 - 23. 36. An embossed product, which is a foil or layered material, with an image made on it, characterized in that the image has a look similar to a photograph and is created by different levels of gray, while the image on the product is made using the calender described in one of the paragraphs 24 to 34.