Receptacles – End wall structure – Joint or seam between sidewall and end wall
Patent
1989-05-18
1990-10-16
Fidei, David T.
Receptacles
End wall structure
Joint or seam between sidewall and end wall
220356, 220359, 220DIG29, B65D 804
Patent
active
049628623
ABSTRACT:
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.
REFERENCES:
patent: 3432072 (1969-03-01), Quercia
patent: 3434644 (1969-03-01), Collie
patent: 4402461 (1983-09-01), Woerz et al.
patent: 4579242 (1986-04-01), Ellis
patent: 4762249 (1988-08-01), Fortuna et al.
Edward M. Petrie, "Joining the Engineering Plastics", Aug. 1980, pp. 14-23.
Campbell, "Joining Plastics with Fusion Bonding", Machine Design, vol. 52, No. 23, 10/80, pp. 136-140.
Farrington Edward J.
Van Keimpema Gerrit J.
Fidei David T.
Koninklijke Emballage Industrie Van Leer B.V.
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