Koninklijke Emballage Industrie Van Leer B.v.

Koninklijke Emballage Industrie Van Leer N.v.

Edward J Farrington

Gerrit J Van Keimpema

Bernard J DeLoos

Barrel with flanged body

The invention deals with the butt-welded connection between the endwall and the body of a thermoplastic container. Contrary to the known connection the invention provides the endwall with an axially extending edge, which may form part of a gripping edge and which overlaps the weld, so that the weld beads are hidden, while further the area of transition between the endwall and its edge above the weld has an axial thickness which is in essence the same as the thickness of the endwall and the radial thickness of the axially extending edge of the endwall, so that the material flow of the plastic during molding of the endwall is more even.

Thermoplastic container having end wall butt-welded to body

Process and device for connecting together an extruded plastic cylindrical vessel body (2) with a plastic lid (1) by means of butt-welding of edges (4,5) heated with a heated plate (12) the said lid being deformed elastically to a larger diameter prior to butt-welding, the device for expanding the lid (1) having a conical expansion element (9), a supporting ring (10) and locking elements (11) holding the expanded lid at a diameter corresponding to the edge diameter of the body (2).

Growing community of inventors

Vinkeveen, Netherlands

Edward J Farrington