Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1985-10-29
1987-12-08
Kittle, John E.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
428 60, 428153, 428130, 493287, 493356, B32B 304, B31C 1102
Patent
active
047117974
ABSTRACT:
The invention relates to a material for packing containers comprising punched out blanks or a coherent web made up of a carrier layer of cardboard which on either side has a coating of thermoplastics. The carrier layer is reduced in thickness along selectively chosen regions in that parts of the carrier layer material are ground away and the regions of the blank or of the web which include the said thickness-reduced regions are folded over one another so as to form a so-called Z-fold wherein parts folded together are sealed to one another in order to form portions of rigid form, the total material thickness within the said ground portions of the Z-folded region A substantially corresponding to the thickness of the non-ground material.
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Kittle John E.
Seidleck James J.
Tetra Pak International AB
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