Abstract This invention is concerned with a method of continuously manufacturing a composite web comprising two flexibles superposed sheets assembled at spaced intervals by parallel flexible strips secured by their edges to the pair of superposed sheets so that a movement of the parallel strips can be obtained by moving said superposed sheets in relation to each other, this method consisting in causing the pair of sheets and their intermediate strips to be fed continuously between the pressure members of a heat-welding set while welding each edge of the intermediate strip only to the single sheet to which this edge is to be secured, an insulating sheet being interposed between the strip and the sheet to which this strip is not to be welded, for preventing the intermediate strip from being welded simultaneously to both sheets of the composite web without welding said insulating sheet to the elements between which it is inserted.
A method of manufacturing a continuous composite web of a pair of flexible superposed sheets connected at spaced intervals by parallel flexible strips secured by their edges to said pair of superposed sheets in such a manner that a movement of said parallel strips can be obtained by moving said superposed sheets in relation to each other, consisting in moving said superposed sheets between a heat welding set, feeding said flexible strips one at a time between said moving superposed sheets with the leading edge of the strip being fed superposed above the trailing edge of a strip already attached to the upper of said superposed sheets, inserting a sheet of insulating material between said superposed strip leading edge and said attached strip trailing edge, clamping said welding set against said strips leading edge and trailing edge whereby said strip leading edge is welded to the uppermost of said sheets and said strip trailing edge is simultaneously welded to the lowermost of said sheets, withdrawing said insulating of insulating material and repeating the above steps.
Claim 2
Independent Claim
175 words
A method of manufacturing a continuous composite web of a pair of flexible superposed sheets connected at spaced intervals by parallel flexible strips secured by their edges to said pair of superposed sheets in such a manner that a movement of said parallel strips can be obtained by moving said superposed sheets in relation to each other, consisting in moving said superposed sheets between a heat welding set, feeding said flexible strips one at a time between said moving superposed sheets with the leading edge of the strip being fed superposed above the trailing edge of a strip already attached to the upper of said superposed sheets, inserting a sheet of insulating material between said superposed strip leading edge and said attached strip trailing edge, clamping said welding set against said strips leading edge and trailing edge whereby said strip leading edge is welded to the uppermost of said sheets and said strip trailing edge is simultaneously welded to the lowermost of said sheets, withdrawing said insulating of insulating material and repeating the above steps.