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US 4,252,585 AGranted
Method for making a plastic container
AssigneeRheem Manufacturing Company
InventorsErwin M. Raabe, Jack M. Kamins, Benjamin F. Cake, Albert F. Gerlovich, William A. Conrad, George E. Trieschock, Morris M. Knepp, Lee R. Layman, Eugene E. Stark
Life of this patent
Estimating the term…
Abstract
Plastic containers include a shell an open end of which is sealably closed by a closure member having a peripheral hinge portion secured to the shell and an inner expanse which may be bowed axially of the shell. The closure member is unfolding or deformable in drop testing such that sealable closure of the shell is maintained.
Claims5
A method for making a container comprising the steps of:
- (a) cutting plastic sheet material into a sheet of predetermined length and width;
- (b) forming such cut sheet into a hollow shell having a slit extending axially between open ends of said shell and defined by juxtaposed edges of said sheet;
- (c) sealing said slit to provide an axially extending continuous sealed seam for said shell;
- (d) forming a closure member for one of said shell open ends by shaping integral plastic material peripherally in hinge configuration and interiorly thereof in bowed configuration;
- (e) forming an assembly wherein said closure member is disposed in encircling relation to said shell adjacent said one open end and wherein bonding material containing magnetizable particles is disposed between said closure member and said shell;
- and
- (f) securing said assembly by simultaneously applying pressure to said assembly and disposing a magnetic field generator in immediate juxtaposition with the periphery of said closure member, thereby heating said bonding material to its fusion point for flowing thereof into intimate contact with said closure member and said shell adjacent said one open end.
4 more elements
Dependencies are inferred from the claim text.