Bung drum made of plastics with one or more bung openings

• US 3,910,450 A
• Filed: 11/27/1973
• Issued: 10/07/1975
• Est. Priority Date: 12/21/1972
• Status: Expired due to Term

• Current Assignee: Wilhelm Hammes
• Original Assignee: Wilhelm Hammes
• Inventors: Hammes, Wilhelm
• Primary Examiner(s): Price, William I.
• Assistant Examiner(s): Moy, Joseph M.
• Application Number:
  US05/419,241
• Time in Patent Office: 679 Days
• Field of Search: 220/6R,66,67,74,75,DIG.29
• US Class Current: 220/613
• CPC Class Codes: B65D 11/06 Drums or barrels thermally insulated B65D81/3802
• CPC Class Codes: Y10S 220/29 Welded seam

Abstract

A plastic bung drum is provided with a mouth portion made integral with the body of the drum. The circumferential edge of the mouth portion is bent to form an inwardly projecting lip, while an intermediate section of the mouth is provided with an inwardly projecting circumferential bulge, forming a bead. A closure which fits into the mouth of the drum has its opposite edges bent to form outwardly extending circumferential lips, and is provided with a pair of intermediate circumferential flanges which, with the adjacent lips, form a groove at each end of the closure. These grooves engage the inwardly extending circumferential lip and bead on the drum. A peripheral weld is then made to produce a secure, substantially inseparable joint between the inwardly bent lip on the mouth of the drum and the corresponding lip on the closure.

Claims

1. A drum of the type having a plastic body portion and a separate plastic closure portion firmly seated within an end of the body portion comprising the combination of:

a. a body portion having a mouth portion at one end thereof, said mouth portion having 1. an inwardly projecting circumferential bead-like bulge, said bulge defining a generally radially inwardly projecting annular gripping recess, 2. an inwardly bent circumferential lip located outwardly of said bulge relative to a longitudinal axis of the drum, and 3. an intermediate section extending between said bulge and said lip and defining a generally radially outwardly projecting annular first groove; and

b. a plastic end closure for said mouth portion having circumferential margin means firmly anchored within the mouth portion of said body portion to resist distortion of the latter while preventing removal of said end closure from said body portion, said margin means comprising 1. an outwardly-bent circumferential lip at each end, 2. a first circumferential flange forming, with a first of said outwardly bent lips, a first groove engaging and seating the inwardly bent circumferential lip of the mouth portion of the drum, said first circumferential flange and said first outwardly bent lip extending radially outward beyond the radial inner extent of the inwardly bent circumferential lip on the mouth portion of the drum body portion such that said first circumferential flange and said first outwardly bent lip firmly engage substantialLy all of the area of the opposite longitudinally spaced surfaces on said inwardly bent circumferential lip, the inwardly bent circumferential lip extending into said first groove the entire depth thereof, and 3. a second circumferential flange forming with the second of said lips a second annular groove engaging and seating the inwardly projecting circumferential bead-like bulge of the drum, said second circumferential flange and said second lip extending radially outward beyond the radial inner extent of said bulge such that said second flange and said second lip firmly engage opposite longitudinally spaced surfaces of said bulge, said engagements forming substantially inseparable joints; and

c. a peripheral bead of material forming a weld joining the peripheral edge of the first of said lips of the closure portion and said inwardly-bent circumferential lip of the mouth portion of the drum.

2. a first circumferential flange forming, with a first of said outwardly bent lips, a first groove engaging and seating the inwardly bent circumferential lip of the mouth portion of the drum, said first circumferential flange and said first outwardly bent lip extending radially outward beyond the radial inner extent of the inwardly bent circumferential lip on the mouth portion of the drum body portion such that said first circumferential flange and said first outwardly bent lip firmly engage substantialLy all of the area of the opposite longitudinally spaced surfaces on said inwardly bent circumferential lip, the inwardly bent circumferential lip extending into said first groove the entire depth thereof, and

3. A drum according to claim 1 wherein the mouth portion, including the inwardly bent circumferential lip and the inwardly projecting circumferential bead-like bulge, is formed integral with the body portion of the drum.