Fremgangsmåde til tæt sammenføjning ag genstande af et tyndt foliemateriale, fortrinsvis en dåse og dennes låg samt apparat tol udøvelse af denne fremgangsmåde.

摘要

Apparatus for the joinder of edge portions of sheet material into a sealing joint by arranging sheets with edge portions to be joined in aligned superposed relation and providing a blank of thermoplastic material having a shape and dimension corresponding to the shape and dimension of the edges to be joined including first and second platen elements movable toward and away from one another and shaped to contact and fold said blank about the edges of said sheets.