Method of making a perforated, molded container

Details Method of making a perforated, molded container Method of making a perforated, molded container

1976-02-04

1978-08-01

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Punching article from sheet material

264155, 264161, 264163, 264250, 264294, 264322, B29C 1703, B29C 1710

Patent

active

041043499

ABSTRACT:
Method of making a molded container for potted plants from a sheet of organic polymer, is molded in one piece from a sheet of organic polymer material. Rigidity is provided by a peripheral solid lip formed with a horizontally extending lower surface and convexly curved upper surface. One or more drainage apertures are formed through the bottom wall of the container by limited vertical shearing eliminating waste and permitting adjacent portions to be strengthened and raised to dispose the aperture above a supporting surface. In molding the container, a strap of serrated steel is used to cut through the sheet material to define the outer edge of the container lip.

REFERENCES:
patent: 1972789 (1934-09-01), Newkirk
patent: 2393549 (1946-01-01), McCreery
patent: 3165787 (1965-01-01), Carmack
patent: 3427688 (1969-02-01), Wilson
patent: 3461761 (1969-08-01), Mojonnier
patent: 3822161 (1974-07-01), Haase
patent: 3828631 (1974-08-01), Spengler et al.
patent: 3949046 (1976-04-01), Proctor

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