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EP-3672877-B2 - METHOD AND DEVICE FOR PRODUCING A BLANK FROM A PACKAGING MATERIAL

EP3672877B2EP 3672877 B2EP3672877 B2EP 3672877B2EP-3672877-B2

Inventors

  • Förstmann, Dirk
  • BISCHOFF, MARTIN
  • ROESLER, BURKARD

Dates

Publication Date
20260513
Application Date
20180813

Claims (7)

  1. Method for producing a blank (22) from a packaging material, in particular from tin foil, paper, film or the like, in order to wrap pack contents of a pack for tobacco products, wherein the blank (22) has a lifting strip (38) as a removal aid for removing at least a part of the pack contents, and wherein the lifting strip (38) is delimited by weakening lines (39) in the blank (22), wherein a continuous material web (44) for the blanks (22) is fed to a stamping device (45) with a stamped formation being applied to the continuous material web (44) for the blanks (22), and that, by means of a cutting device (46), weakening lines (39) for the lifting strip (38) are applied to the continuous material web (44) for the blanks (22), and that, by means of a severing device (47), individual blanks (22) are severed out of the continuous material web (44), wherein each blank (22) has weakening lines (39) for a lifting strip (38), characterized in that upstream of the stamping device (45) there is arranged a cutting device (65) in which weakening lines (39) for the lifting strip (38) are applied to the continuous material web (44) for the blanks (22), said weakening lines extending in the longitudinal direction of the continuous material web (44).
  2. Method according to Claim 1, characterized in that drives of the cutting device (46) and of the severing device (47) are coupled together.
  3. Method according to Claim 1, characterized in that , in the cutting device (46), following the stamping device (45), weakening lines (39) for the lifting strip (38) are applied to the continuous material web (44) for the blanks (22), said weakening lines extending in the transverse direction of the continuous material web (22).
  4. Method according to Claim 1, characterized in that , in the cutting device (65) arranged upstream of the stamping device (45), weakening lines (39) for the lifting strip (38) are also applied to the continuous material web (44) for the blanks (22), said weakening lines extending in the transverse direction of the continuous material web (44) for the blanks (22).
  5. Method according to Claim 1 or any of the other preceding claims, characterized in that the weakening lines (39) are applied to the continuous material web (44) by means of one or more perforation knives (49, 61, 64) which are retained (magnetically) on the circumference of a magnetic roller (48).
  6. Apparatus for producing a blank (22) from a packaging material, in particular from tin foil, paper, film or the like, in order to wrap pack contents of a pack for tobacco products, wherein the blank (22) has a lifting strip (38) as a removal aid for removing at least a part of the pack contents, and wherein the lifting strip (38) is delimited by weakening lines (39) in the blank (22), wherein the apparatus has the following features: a) a stamping device (45) for applying a stamped formation to a continuous material web (44) for the blanks (22), b) a cutting device (46) for applying weakening lines (39) for the lifting strip (38) to the continuous material web (44), and c) a severing device (47) for severing individual blanks (22) out of the continuous material web (44), wherein each blank (22) has weakening lines (39) for a lifting strip (38), characterized in that upstream of the stamping device (45) there is arranged a cutting device (65) which is designed to apply weakening lines (39) for the lifting strip (38) to the continuous material web (44) for the blanks (22), said weakening lines extending in the longitudinal direction of the continuous material web (44).
  7. Apparatus according to Claim 6, characterized in that the apparatus is designed to apply the weakening lines (39) to the continuous material web (44) by means of one or more perforation knives (49, 61, 64) which are retained (magnetically) on the circumference of a magnetic roller (48).

Description

The invention relates to a method for producing a blank from a packaging material, in particular tin foil, paper, film or the like, for wrapping the contents of a package for tobacco products, wherein the blank has a lifting strip as a removal aid for removing at least a part of the package contents, and wherein the lifting strip is limited by weakening lines in the blank, according to the preamble of claim 1. The invention further relates to a corresponding device according to the preamble of claim 6. Hub strips of the aforementioned type are, for example, made from the WO 2017/076481 A1 The applicant is aware of a similar invention. There, the lifting strip, as part of an inner blank, serves to facilitate the removal of at least one cigarette from an inner pack. Advantageous variations regarding the design of lifting strips are disclosed in that document. The present application, however, deals with the production of such blanks. A method and a device according to the preamble of claims 1 and 6 are derived from the DE 10 2008 047773 A1 known. Based on this, the invention aims to propose methods and devices for producing corresponding cutouts. To solve this problem, a method according to the invention has the features of claim 1. Accordingly, it is provided that a cutting device is located upstream of the embossing device, in which weakening lines for the lifting strip are applied to the continuous material web for the blanks, running in the longitudinal direction of the continuous material web. In this case, it is provided that weakening lines for the lifting strip are applied in the cutting device downstream of the embossing device, running in the transverse direction of the continuous material web. A device according to the invention has the features of claim 6. Further details and special features of the invention are described below with reference to the drawings. These show: Fig. 1 a spatial representation of an opened pack of cigarettes, Fig. 2 the package according to Fig. 1 when operating a pull flap, Fig. 3 a spread-out cut for an inner pack of the package according to Fig. 1 , Fig. 4 a schematic representation of a first device for producing the blank according to Fig. 3 , Fig. 5 a schematic representation of a second device for producing the cut according to Fig. 3 , Fig. 6 a lateral surface of an embossing roller, Fig. 7 a lateral surface of a variant of the embossing roller, Fig. 8 a cut through an embossing roller along cutting line VIII - VIII in Fig. 6 , Fig. 9 a lateral surface of a cutting roller, Fig. 10 a cut through the cutting roller along cutting line X - X in Fig. 9 , Fig. 11 a schematic representation of a third device for producing the cut according to Fig. 3 , Fig. 12 an alternative solution to the cutting roller, and Fig. 13 another alternative solution to the cutting roller. The drawings show, as an example, a cigarette pack of the hinged-box type as outer packaging 10. It is understood that the invention is also applicable to other types or shapes of packaging. The outer packaging 10 comprises a (lower) box part 11, a lid 12, and a collar 13. The box part 11 has a front wall 14, a back wall 15, and side walls 16. Similarly, the lid 12 has a front wall 17, a back wall 18, and side walls 19. The box part 11 and the lid 12 are pivotally connected to each other, in this case by means of a linear hinge 20 in the area of the back wall 15, 18. The package contents are a formed group of cigarettes 37, i.e., a cigarette group 21. The cigarettes 37 are arranged in rows with a front row and preferably at least one further row. The cigarette group 21 is surrounded by a blank 22 made of packaging material such as tin foil, paper, film or the like. The blank 22 preferably completely surrounds the cigarette group 21 and forms a closed, block-shaped inner pack 23 (so-called tin foil block). In the exemplary embodiment, the cutout 22 is in Figs. 1 to 3 designed according to the longitudinal folding principle. An elongated, especially rectangular, cut ( Fig. 3 ) forms successive areas for a front wall 24, a bottom wall 25 and a back wall 26. The walls are separated from each other by (imaginary) longitudinal and transverse fold lines 27. Starting from the closed, single-layer bottom wall 25, the blank 22 is folded in a U-shape around the cigarette group 21. An end wall 28 is formed from folded flaps, in this case in the form of an envelope fold with trapezoidal longitudinal flaps 29, 30. The outer longitudinal flap 30 is connected to the front wall 24 of the blank 22. Side walls 31 of the inner pack 23 are folded from each other. Partially overlapping side flaps 32, 33 are formed, wherein the side flaps 32 connected to the front wall 24 are located on the outside of the folded cut section 22, thus partially covering the side flaps 33 connected to the back wall 26. The inner packaging 23 is partially enclosed in an upper area facing the lid 12 by the collar 13, specifically by a front wall 34