CZ264699A3 - Process for producing partially stamped cover elements for closing crucibles, apparatus for making such process and the partially stamped cover element produced in such a manner - Google Patents

Abstract

In the process of producing partially embossed elements of the elements (2.14.24 / pro) closing the cups (26), in particular the food containers (26) for the food foil material / 1 /, using printed marks / 5 / the first scanner / 8 / readable distance / YZ among the future the cover elements (2) extending between the two embossing rolls (11,12); 11 ', 127. In addition to smooth areas / 11b, 12; 11 'b, 12ΊΥjsoutyto also having embossing regions (11a, 12a); 11a, 12'a /. Their the angular position is determined by a second sensor (13). After comparison the values detected by the sensor (8.13) by the controller (9) are produced in part embossed foil material (15) which is guided over the guide rollers (16,17,18) 19,20 / is introduced into a die (23) in which they are manufactured partially embossed cover elements (14,24). The respective culling consists of the unwinding device (6), which is driven by the motor (7), first sensors / 8 / for positioning printed marks / 5 / on foil material (1) and punch station (10). Station / 10 / consists of stamping cylinders / 11,12; II ', 127 with a partially smooth sensor / 8 surface 13 / which for positioning the printed marks (5) of the angular position of the rollers, are connected to the controllers from a plurality of guides rollers (16,17,18,19,20) and a pair of sliding rollers (21) and pressing tool (23). A partially embossed cover element (14) is provided a non-drawn area (14b) optionally provided with a description and an embossed region (14a).

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a method for the production of a partially embossed cover element for sealing crucibles, in particular food crucibles, to an apparatus for carrying out the method, and to a partially embossed cover element produced by the process.

BACKGROUND OF THE INVENTION

Crucible cover elements, for example, lids for crucibles with yoghurt, are produced, inter alia, by cutting from printed aluminum foils. In order to close the crucible airtightly, these foils are provided on the unprinted side with a layer of heat-sealable varnish, also called a heat-sealable coating. After cutting out the desired shape, these cover elements are placed in a stack. For further processing, they must be removed from the stack, for example by means of suction cups. In order to prevent multiple cover elements from adhering to each other when lifting and removing, since there is no air layer between them, the cover elements are provided with a stamped surface. The embossing is usually carried out on the printed foil before the cover elements are cut out. However, the embossing has the disadvantage that the printing is distorted or even destroyed.

According to document FR-A-2 731 986, cover elements have therefore been proposed which have, in addition to the embossed area, also a non-embossed area on their surface. This unexpressed area is provided with a print which contains important information for consumers such as

• · • ·

η

OF.

durability and composition of the product and must therefore be legible.

These cover elements are made of printed and subsequently embossed foil. Correspondingly shaped punching tools are used to form the unstretched area. These are pressed under high pressure to the embossed foil to form an unprinted surface area. The described process is therefore expensive, since the stamping must therefore be smoothed again with the additional tool. However, there are traces of embossing on the surface, so the print is still distorted and its readability is further impaired.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method of the kind mentioned, which on the one hand is easy to carry out and, on the other hand, makes it possible to produce partially embossed cover elements with advantageous consumer properties. It is also an object of the present invention to provide a construction of an apparatus for carrying out the method and a cover member produced by the method.

SUMMARY OF THE INVENTION

This object is solved and the described drawback of known methods of this kind largely eliminates the method for producing partially embossed lids, in particular food cups, according to the invention, which is based on the fact that the foil material on which they are the first sensor by means of printed marks readable distances between future covering elements are guided between two embossing rollers, which are provided with embossing regions in addition to the smooth regions and whose angular position is detected by a second sensor, after comparing the values detected with the regulator, a partially embossed foil material is produced. it is introduced into a pressing tool in which partially embossed cover elements are produced.

• · · · · · · · · · · ·

If the values detected by the sensors do not match, the detected difference is introduced into the motor, so that, while maintaining the rotational speed of the embossing rollers, the torque of the unwinding device is reduced or increased and the tensile force thus generated draws the foil material by the embossed or non-embossed areas are formed with the correct dimensions between the printed marks.

The film material is preferably of plastic or aluminum with a tensile strength of 50 to 200 N / mm ² .

Another possibility is that the film material is a laminate selected from the following material combinations: aluminum / aluminum, aluminum / plastic, aluminum / paper, aluminum / paper / plastic, plastic / plastic, plastic / paper, aluminum / paper / aluminum, aluminum / / plastic / aluminum.

The invention also relates to an apparatus for carrying out a method for producing partially embossed crucible lid cover elements comprising an unwinding device which is driven by a motor, a first sensor for sensing the position of printed marks on a film material, an embossing station consisting of embossing rollers with a partially smooth surface the angular position of which is sensed by a second sensor, the sensors being connected to a regulator which regulates the engine torque on the basis of the values determined, as well as several guide rollers, a pair of feed rollers and a pressing tool e.

The invention also relates to a partially embossed cover element for a food crucible produced by the method of the invention. The partially embossed cover element is provided with a non-embossed area, which is optionally provided with a description, and a embossed area,

The areas correspond to the embossing regions and the smooth regions of the embossing rollers.

The invention furthermore relates to a partially embossed cover element for food crucibles produced by the method according to the invention. The partially embossed cover member is provided with a non-embossed region which approximately corresponds to the crucible flange, the embossed region being located on the remaining surface of the cover member and the underside of the cover member facing the crucible provided with a heat-sealable coating.

The partially embossed cover element is preferably provided with an edge heat-sealable coating in the region of the rim of the food crucible on its underside which faces the crucible.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention is further elucidated with reference to the accompanying drawings, in which:

FIG

FIG

FIG

FIG

FIG. 5 shows an apparatus for carrying out the method according to the invention, a foil material used in the method according to the invention, a partially embossed cover element, embossing rollers, in another embodiment of the apparatus according to the invention, a partially embossed cover element produced by

4, and in FIG. 6, a partially embossed cover member when used to close a food crucible.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows an apparatus for carrying out the method according to the invention, comprising an unwinding device 6 driven by a motor 7, a first sensor 8 for sensing the position of the printed marks 5 on the film material 1, an embossing station 10 which consists of embossing cylinders 11 and 11 ', and 12 and 12', respectively, with a partially smooth surface, the angular position of which is sensed by the second sensor 13, wherein the sensors 8, 13 are connected to a regulator 9 which regulates the engine torque 7 and a plurality of guide rollers 16, 17, 18, 19,

20, a pair of feed rollers 21 and a press tool 23.

Fig. 2 shows the film material 1 used in the method according to the invention, the dimensions of which are chosen according to the cover elements 2, which can be provided with a printing 3 in the embossed area and a printing 4 formed in the unprinted area of the cover element 2. the distance Y is always between the two cover elements 2; When the material is stretched, the film material 1 is additionally stretched by an X value. The cover elements 2 in their preformed form are further provided with a thermally sealable coating 25 'on the underside, or at least a marginal, heat sealable coating 25.

FIG. 3 shows a partially embossed cover element 14 with a stamped surface area 14a and an un stamped, smooth surface area 14b.

Fig. 4 shows the embossing rollers 11 ', 12' in the embossing φ φ ·

φ «φ φ φ

In another embodiment of the device according to the invention, the station 10 in a further embodiment of the present invention. Thus, the embossing area 11 'and the embossing cylinder surface 11' on the partially embossed cover element 24 correspond to the embossed area 24a. The smooth surface area 11'b of the embossing roll 11 'then also corresponds to the smooth, un stamped area 24b of the partially embossed cover element 24. Similarly, the embossing roll 12' has a surface embossing area 12'a and a smooth surface area 12'b.

FIG. 5 shows a partially embossed cover element 24 produced by the embossing rollers 11 ', 12' of FIG. 4 in another variant of the methods of the invention. This partially embossed cover element 24 has a stamped surface area 24a in accordance with an embodiment of the embossing roll surface 11 ', 12' and a smooth, un stamped surface area 24b.

FIG. 6 shows a partially embossed cover element 24 when used to close a food crucible 26. On the upper side of the cover element 24 there is a stamped area 24a as well as an un stamped area 24b. The lower side facing the crucible 26 '24' is provided with a peripheral, heat-sealable coating 25 in the region of the rim 27 of the crucible 26. However, the heat-sealable coating 25 'may also be present over the entire remaining portion of the lower side 24'.

The process according to the invention will be explained in more detail below with reference to examples.

In one embodiment of the invention, the film material 1 is provided with preformed cover elements 2 that can be printed such that the embossed area 14a is printed with 3, while the non-embossed area 14b is printed with 4, for example in the form of a description for consumer information. To indicate the distance between the individual cover elements 2, printed marks 5 are formed on the film material 1.

ΦΦΦΦ ΦΦ

- 7 φφφ

9 · »· 9 • ΦΦ 9

Φ · · Φ

Φ · Φ Φ • ·· ΦΦΦ

The film material 1 may be, for example, plastic or aluminum with a tensile strength of 50 to 130 N / mm ² . However, it is also possible to use a layered material with high tensile strength and may be selected from the following material combinations: aluminum / aluminum, aluminum / plastic, aluminum / paper, aluminum / paper / plastic, plastic / plastic, plastic / paper, aluminum / paper / aluminum, aluminum / plastic / aluminum.

The foil material 1 at the speed determined by the motor 7 is unwound from the unwinding device 6 passes around the first sensor 8, which in FIG. 2 detects the distance Y between the printed marks 5 in the longitudinal direction and passes this value to the regulator 9. 10, which consists of embossing rollers 11 and 12. These are provided on their surface with embossing regions 11a and 12a and smooth regions 11b and 12b, which form the un stamped regions 14b of the partially embossed cover member 14. The angular position of the embossing rollers 11, 12 is determined. second sensor 13 and is also transmitted to the controller 9, which compares the detected values. If these values are consistent, it is ensured that between the two printed marks 5, a partially embossed cover element 14 with embossed areas 14a or precisely located non-embossed areas 14b is formed in accordance with regions 11a and 11b, respectively 12a and 12b. .

However, if these values deviate from each other, this difference is detected and the regulator 9 regulates the motor 7 to this effect. If the torque of the motor 7 decreases according to the difference found, but the rotation speed of the embossing rollers 11 and 12 is maintained, The drawing material 1 extends to the desired length X between the printed marks 5 - see FIG. 2.

The partially embossed foil material 15 is then passed through the guide 4 • 4

4 • · ·

4

4

4

44

- 8 44 • 4 • • 444

44

4444 • 4

4

444 of the rollers 16, 17, 18, 19 and 20 is guided to a pair of feed rollers 21, which is controlled by a reader 22. By means of a press tool 23, the finished partially embossed cover elements 14 are then cut and stacked in the desired shape.

These finished partially embossed cover elements 14 have embossed areas 14a and un stamped areas 14b. Possible descriptions with consumer information are provided in the unstretched area 14b and have good readability.

In a further variant of the method according to the invention, partially embossed cover elements 24 are produced according to FIGS. 4 and 5. The film material 1 is also provided in this case with pre-prepared cover elements 2, with the only difference that these cover elements 2 are heat sealable coatings 25, 25 ', e.g. Printing 4 may be omitted.

Furthermore, in the embossing station 10, embossing rollers 11 'and 12' are used instead of embossing rollers 11 'and 12', which are provided with smooth regions 11'b, 12'b to form a smooth, undamaged region 24b. The embossing areas 11'a, 12'b form the embossed area 24a.

The smooth, non-embossed region 24b may correspond in width to the flange 27 of the food crucible 26 and is preferably provided with an edge heat-sealable coating 25. However, it is also possible for the heat-readable coating 25 'to be additionally applied to the embossed area 24a. so that the cover element 24 is provided with a heat sealable lacquer on its entire underside 24 '.

The other process phases correspond to the previous process variant.

- 9 · · t t t t t 9 9 9 9 9 9 9 9 <<<<<<<<<<<

···············

The partially embossed cover elements 24 can now be easily removed from the stack due to their strongly embossed areas 24a. Furthermore, the consumer can easily manipulate these cover elements 24 as they can be easily pulled off the flanges 27 of the food crucible 26. This is accomplished by a smooth, non-embossed region 24b, which is preferably provided with an edge heat sealable coating 25.

Industrial usability

The partially embossed cover elements 2, 14, 24 produced by the method according to the invention have advantageous properties for the consumer, since they can be easily pulled off from the food pots 26 and at the same time have readable descriptions on their non-embossed areas 14b, 24b.

Moreover, these partially embossed cover elements 2, 14, 24 can be easily removed from the stack, which is made possible by their embossed areas 14a, 24a, which are immediately adjacent to the non-embossed areas 14b,

Claims (4)

PATENT CLAIMS Method for producing partially embossed cover elements (2, 14, 24) for closing crucibles (26), in particular crucibles (26) for foodstuffs, characterized in that the foil material (1) on which they are printed by means of printed marks (5) a first sensor (8) of a readable distance (Y) between future cover members (2) is guided between two embossing rollers (11, 12; 11 '), 12 '), which are in addition to the smooth regions (11b, 12b; 11'b, 12'b) also provided with embossing areas (11a, 12a; 11'a, 12'a) and whose angular position is detected by the second sensor (13), after comparing the values detected by the sensors (8, 13) with the regulator (9), partially embossed foil material (15) is produced, which is guided over guide rollers (16, 17) 18, 19, 20) is introduced into a die (23) in which partially embossed cover elements (14, 24) are produced. Method according to claim 1, characterized in that in the event of a mismatch between the values detected by the sensors (8, 13), the detected difference is introduced into the motor (7) so that the punching rolls (11, 12; 11 ') are maintained at the rotational speed. 12 ') decreases or increases the torque of the unwinding device (6) and the thus-drawn tensile force draws the foil material (1) by the value (X) measured on the printed marks (5) so that the values of the sensors (8, 13) are matched; the embossed or non-embossed regions (14a, 14b; 24a, 24b) are formed with the correct dimensions between the printed marks (5). Method according to claim 1 or 2, characterized in that the film material (1) is of plastic or aluminum with a tensile strength of 50 to 200 N / mm ² . ·· <0 • 0 0 • 000 • · 4 • 0 4 0000 * 0 0 0 0 000 000 • 0 00 00 Method according to claim 1 or 2, characterized in that the film material (1) is a laminate selected from the following material combinations: aluminum / aluminum, aluminum / plastic, aluminum / paper, aluminum / paper / plastic, plastic / plastic, plastic / paper, aluminum / paper / aluminum, aluminum / plastic / aluminum. Apparatus for carrying out the method according to any one of claims 1 to 4, comprising a unwinding device (6) driven by a motor (7), a first sensor (8) for sensing the position of the printed marks (5) on the film material (1), an embossing station (10), which consists of embossing rollers (11, 12; 11 ', 12') with a partially smooth surface, the angular position of which is sensed by the second sensor (13), the sensors (8, 13; are connected to a regulator which controls the engine torque (7) on the basis of the determined values, as well as several guide rollers (16, 17, 18, 19, 20), a pair of feed rollers (21) and a press tool (23). A partially embossed cover element (14) for food crucibles (26) produced by the method according to claims 1 to 4, characterized in that it is provided with a non-embossed area (14b), optionally with a description, and a embossed area (14a), these regions (14a, 14b) correspond to the embossing regions (11a, 12a) and the smooth regions (11b, 12b) of the embossing rollers (11, 12). A partially embossed cover element (24) for food crucibles (26) produced by a method according to claims 1 to 4, characterized in that it is provided with an un stamped region (24b) which approximately corresponds to the flange (27) of the crucible (26). the remaining area of the cover element is • 9 • 9 9 999 9 94 9 9 9 9 9999 98 • 9 9 9 9 9 The embossed region (24a) and the underside (24 ') of the cover member (24) facing the crucible (26) are provided with a heat-sealable coating (25, 25'). Partially embossed cover element (24) according to claim 7, characterized in that it is in the region of the rim (27) of the food crucible (26). provided with a peripheral, heat-sealable coating (25) on the underside (24 ') facing the crucible (26).