| abstract |
Method for the production of a compound foil as an endless strip, the compound foil to be processed in the form of rectangular blanks covering a width of the endless strip characterized in that two different foil strips, of which a first strip contains an aluminum foil (4) or a paper are drawn through a lamination machine with tractive forces to overcome friction losses in the machine, these tractive forces producing different elongations in said two different foil strips, that one of the endless strips is provided at one side surface with a binding agent over a connecting surface, which consists of several partial areas (3, 13) separated from each other, that the two strips are connected to each other while the both strips being elastically stretched to different elongations as the strips are drawn through the lamination machine whereby after the two foil strips coming back again to their non-stretched starting state, that surfaces of the blanks each have one central area and two margin areas (9, 12) bordering on two blanks surface margins extending both in the endless strip extension, with, in each instance, in those margin areas (9, 12 ) a first proportion defined by the connecting surface area divided by the margin area surface being significantly greater than a second proportion defined by the connecting surface at the central area divided by the central area surface and that in the margin areas (9, 12) of the blank surface the said first proportion is at most 75%. |