Title: Drum assemblies with preformed inserts

Abstract: A plastic drum assembly includes a preformed insert fused to at least a portion of the corner of the drum. In order to facilitate lifting and handling the drum, the insert is formed with a pair of indentations on opposite sides of a ridge. The method involves placing the preformed plastic insert across at least a portion of a corner of a mold cavity and blow molding the drum in the cavity to form the drum and fuse the drum corner to the insert. The disclosure also is concerned with methods for forming indentations in a blow molded plastic drum and with a method of reinforcing the corner of a blow molded drum.

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Inventors: Speas, Charles A. (Towson, MD, US)

Application Number: 885363
Filing Date: 1978-03-13
Publication_date: 1980-06-24
Assignee: Hedwin Corporation (Baltimore, MD)
Primary Class(es): 220/646 220/643
Other Classes:
US Patent Ref:

3294271	Dec, 1966	Armbruster	220/71.
3393821	Jul, 1968	Verlinden	220/5.
3960474	Jun, 1976	Kader	425/525.
4022345	May, 1977	Butz	220/73.
4024979	May, 1977	Craig et al.	220/85.
4140236	Feb, 1979	Uhlig et al.	220/71.

Other Refs: 1857242186507618802761908556

May, 1962	DE.
Sep, 1962	DE.
Jul, 1963	DE.
Jan, 1965	DE.

Primary Examiner: Pollard, Steven M.
Assistant Examiner:
Attorney: Semmes; Raphael