Process and device for connecting together by heated-tool butt-welding a vessel body obtained by extrusion and a vessel lid
AssigneeKoninklijke Emballage Industrie Van Leer B.V.
InventorsGerrit J. Van Keimpema, Bernard J. DeLoos, Edward J. Farrington
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Abstract
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).
Claims2
A process for connecting together by heatedtool butt-welding a vessel body obtained by extrusion and a vessel lid which has a capable rim, comprising
- elastically deforming the edge of the lid by mechanical means to a dimension which corresponds to the dimension of the edge of the vessel body,
- welding the vessel body and lid together in this state,
- cooling the weld, and
- removing said deformation of the lid after cooling.
Dependencies are inferred from the claim text.