Method of producing a packaging material

Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container

Reexamination Certificate

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Details

C493S328000, C493S338000

Reexamination Certificate

active

06884206

ABSTRACT:
A method of producing a packaging laminate (10) in which a web is provided with through-going holes (2) which are covered on one side with a first outer layer (3) on the one side of the web and with a second outer layer (4) on the other side of the web in such a manner that the first and second outer layers (3and4) are permanently sealed to one another within the regions of the opening contour of the through-going holes. In order to ensure the permanent seal between the two outer layers (3and4), the web is subjected, after application of the first outer layer but prior to application of the second outer layer, to so-called flame-treating whereby accessible parts of the first outer layer within the regions of the through-going holes (2) are activated or polarized by means of one or more gas flames directed at the other side of the web.

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