Thermocontact welding method and welded product

摘要: An improved thermocontact welding method and apparatus for producing welded seams joining superposed thermoplastic sheets, in particular solid polypropylene other polyolefin sheets. The includes moving a lower platen engaging an upper die assembly applying pressure to interposed sheets at areas thereof between the surface while is temperature higher than melting of thermally isolating are coerced or ejected from during disengagement assembly. A preferred product album leaf having pockets defined by weld containing cards photographs.