Patent ID: 6244852
Filing Date: 2001-06-12
Classification: B29C,B29L,B65D,Y10S

Abstract:
A method of producing a receptacle consisting of a substantially stiff outer receptacle and an easily deformable inner bag which are made from respectively different thermoplastic materials that do not form a welded joint with one another, said receptacle comprising a receptacle opening and at least one wall opening provided in the outer receptacle, through which pressure is compensated in the area between the inner bag and the outer receptacle, with a parison, which consists of at least two tubings, being coextruded and arranged between the opened halves of a blow mold, the blow mold being closed when said parison has reached the length required for producing said receptacle, excess material being squeezed off in the bottom area of the receptacle to be produced, and an outwardly projecting web made of welded material of said outer receptacle being formed, in which web the welded bottom seam of the inner bag is clamped and held in axial direction, and said parison being inflated by a pressure medium for contact with the wall of the blow mold and removed from said blow mold,characterized inthat said at least one wall opening is formed in that a cut or a notch is cut or punched into the wall of said outer receptacle to penetrate through the wall, except for a small residual wall section, and that said residual wall section is opened by applying a force.