Title: Method for blow molding foamed walled plastic open mouthed containers

Abstract: The method for blow molding foam walled plastic using a quadrisectional mold. A parison of foamed plastic may be blow molded to assume the contour of the closed mold, after which the molded shape is severed into two portions and ejected. Desirably, cellular plastic is blow molded to form hot drink cups.

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Inventors: Hahn, Granville J. (Dallas, TX, US)

Application Number: 326568
Filing Date: 1973-01-24
Publication_date: 1976-02-17
Assignee: Cosden Oil & Chemical Company (Big Spring, TX)
Primary Class(es): 264/53 264/54, 264/150, 264/151, 264/159, 264/163, 264/321, 264/527, 264/536, 264/540, 264/DIG1, 425/296, 425/817R
Other Classes:
US Patent Ref:

3225127	Dec, 1965	Scot, Jr.	264/98.
3292252	Dec, 1966	Reading	264/98.
3381076	Apr, 1968	Govatsos	264/163.
3432586	Mar, 1969	Stenger	264/159.
3482006	Dec, 1969	Carlso, Jr.	264/54.
3545040	Dec, 1970	Mehnert	425/150.

Other Refs:
Primary Examiner: Silbaugh, Jan H.
Assistant Examiner:
Attorney: