Method of producing overwrap material, and a pack furnished with the material produced

a technology of which is applied in the field of producing overwrapping material and packing material, and to a pack furnished with the material produced, can solve the problems of difficult dislodge and pack damag

Inactive Publication Date: 2007-10-04
GD SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]The object of the present invention is to provide a method of producing overwrap material, also a pack furnished with an easily removable material obtained by such a method.

Problems solved by technology

In effect, because the overwrap material is pulled so tightly against the outer faces of the pack, by heat-shrinking, it is difficult to dislodge.
Accordingly, additional tears or cuts are made by hand to enable the removal of the larger portion, resulting in damage to the pack.

Method used

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  • Method of producing overwrap material, and a pack furnished with the material produced
  • Method of producing overwrap material, and a pack furnished with the material produced
  • Method of producing overwrap material, and a pack furnished with the material produced

Examples

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Embodiment Construction

[0021]With reference to FIG. 1, the invention relates to a method of producing overwrap material 1.

[0022]In a first step of the method, a continuous strip of preferably transparent and heat-shrinkable overwrap material 1 is caused to advance along a predetermined feed path “P” in a predetermined direction “A”.

[0023]In a further step, a predetermined area 2 of the advancing strip 1 is provided with at least one slit or incision 4 having a geometrical component transverse to the aforementioned direction “A”.

[0024]Advantageously, the step in question involves creating a succession of such slits 4 through the agency of suitable cutting or punching means 5 composed of a main roller 5a carrying a blade 6, and a matching anvil roller 5b. The two rollers 5a and 5b are set in contrarotation about respective axes extending transversely to the aforementioned feed direction “A”.

[0025]The blade 6 presents a profile selected according to the shape of the slit 4 and strikes against the anvil rolle...

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Abstract

Transparent outer wrappers for cigarette packets are prepared by advancing a continuous strip of overwrap material along a given feed path in a given direction, piercing a predetermined area of the strip with a series of slits spaced apart one from another and extending nominally transverse to the feed direction, and bonding a narrow ribbon to the strip along the predetermined area, aligned on at least one portion of the slits; the strip then passes under a blade shaped so as to cut a series of “U” notches spaced apart one from the next, each creating a pull tab at the end of the ribbon, before being divided ultimately into leaves by a pair of contrarotating cutter rollers equipped with respective blades. Each single leaf serves as a wrapper for a relative pack, fashioned so that when torn open by pulling the ribbon, the ribbon encounters the slit and initiates two break lines extending away from the ribbon on either side to facilitate the removal of the wrapper in its entirety.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a method of producing overwrap material, and to a pack covered with the material obtainable by such a method.[0002]In particular, the present invention relates to packs for tobacco products, typically cigarette packets, and indeed reference is made to products of this type in the following specification, albeit implying no limitation in scope.[0003]Conventionally, packets of cigarettes are provided with a protective outer wrapper of transparent heat-shrinkable material, referred to generally as overwrap material.[0004]Dedicated packaging machines first envelop each successive pack in the overwrap material and then apply heat to the selfsame material, causing it to tighten against the outer faces of the pack.[0005]The outer wrapper also incorporates a so-called tear tape or tear-off ribbon, of small transverse dimensions, by means of which the outer wrapper can be broken simply and swiftly when the moment comes to open...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D3/22B31B50/16B31B50/22
CPCB31B1/14B31B1/16B31B1/90B31B2201/145B65D85/1027B31B2219/143B31B2219/145B31B2219/9009B65D75/66B31B2201/9038B31B50/16B31B50/8126B31B70/146B31B70/16B31B70/8123
Inventor BORIANI, SILVANONEGRINI, STEFANO
Owner GD SPA
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