Package making – Methods – Closing package or filled receptacle
Reexamination Certificate
1999-02-25
2001-01-09
Kim, Eugene (Department: 3721)
Package making
Methods
Closing package or filled receptacle
C053S406000, C053S234000, C053S376500, C053S383100
Reexamination Certificate
active
06170239
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a process for producing packs, in particular cigarette packs, in the case of which folding tabs are provided with spots of glue and, in order for these spots of glue to be applied, the packs are moved past a stationary glue unit, which transfers portions of glue from glue nozzles onto the folding tabs during the movement of the packs. The invention also relates to an apparatus for carrying out the process.
Packs, in particular cigarette packs, have folding tabs which are connected to one another, or to other pack parts, by glue during production of the packs. The practice in recent times, in the case of high-performance cigarette packaging machines, is for the glue to be applied to the folding tabs or blanks by glue nozzles. A glue unit is provided with one or more glue nozzles which cyclically discharge small portions of glue and transfer them onto the folding tabs for the purpose of forming spot-like applications of glue.
SUMMARY OF THE INVENTION
The object of the invention is to provide, during the application of glue or spots of glue to packs or blanks, better protection against contamination of the packs or blanks and, in particular, of the packaging machine or the machine elements in the region of a glue station.
In order to achieve this object, the process according to the invention is characterized by the following features:
a) the portions of glue are applied to an (inner) folding tab directed towards the glue unit or the glue nozzle,
b) the portions of glue are ejected from the glue nozzles at an angle (oriented in the conveying direction) to the plane of the folding tab, such that a second folding tab, remote from the nozzle unit or the glue nozzle, intercepts randomly discharged particles of glue.
The invention is based on the finding that, in addition to the actual portion of glue for the purpose of producing the application of glue, the glue nozzles or glue units, which operate at high cycle speeds, randomly discharge very small quantities of glue which, as particles of glue, are for the most part not intercepted by the folding tab which is to be glued. The process according to the invention provides that another region of the pack, namely another folding tab, intercepts the randomly discharged particles of glue as a result of its relative position during transportation in the region of the glue unit. In specific terms, this is achieved in that a folding tab which is more remote from the glue nozzle, and is not intended to be provided directly with glue, intercepts the particles of glue, during continued movement, as a result of the oblique position of the glue unit or of the glue nozzle.
Further measures are also provided according to the invention for the purpose of removing the secondary portions of glue. Thus, the region of a glue station is subjected to the action of suction air, with the result that the relatively small secondary portions of glue are extracted by suction as a result of the relatively low inherent weight.
In the case of the apparatus according to the invention, the glue unit or the glue nozzles is/are directed at an angle to the conveying path of the packs, such that, as the portions of glue are being fed, part of the pack, namely a folding tab, runs along after the folding tab which is to be glued and consequently receives the secondary portions following the portion of glue. Furthermore, the apparatus is provided with a suction-extraction element in the region of a glue station. Moreover, a screen is arranged between the movement path of the packs and the glue unit or the glue nozzles and has a comparatively small through-passage opening for the portion of glue.
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Bretthauer Hans-J{umlaut over (u)}rgen
Focke Heinz
H{umlaut over (a)}fker Thomas
Focke & Co. (GmbH & Co.)
Kim Eugene
Sughrue Mion Zinn Macpeak & Seas, PLLC
LandOfFree
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