US4264016A — Plastic drums and drum assemblies with preformed …

Claim 1

Independent Claim 190 words

A drum assembly comprising: a plastic drum having a top wall, a side wall, and a corner connecting said top and side walls, said assembly including a preformed plastic insert joined to said corner to facilitate lifting the drum assembly, said insert including a first indentation on one side of said corner and a second indentation on the other side of said corner, said insert being confined within a space defined by said top wall as an upper limit and said side wall as an outer limit, said plastic insert including a base, one side of which is joined to said corner, and a ridge extending outwardly from the other side of said base between said indentations, said ridge having a crown which is convex, wherein said side wall is cylindrical, said insert is arcuate and extends partially about the periphery of said drum, the portion of said corner which is not surmounted by said insert forms a curved surface between said top and side walls, and said crown has the same radius of curvature as said curved surface and extends outwardly to the same extent as said curved surface.

Claim 2

Dependent Claim 190 words

A drum assembly comprising: a plastic drum having a top wall, a side wall, and a corner connecting said top and side walls, said assembly including a preformed plastic insert joined to said corner to facilitate lifting the drum assembly, said insert including a first indentation on one side of said corner and a second indentation on the other side of said corner, said insert being confined within a space defined by said top wall as an upper limit and said side wall as an outer limit, said plastic insert including a base, one side of which is joined to said corner, and a ridge extending outwardly from the other side of said base between said indentations, said ridge having a crown which is convex, wherein said side wall is cylindrical, said insert is arcuate and extends partially about the periphery of said drum, the portion of said corner which is not surmounted by said insert forms a curved surface between said top and side walls, and said crown has the same radius of curvature as said curved surface and extends outwardly to the same extent as said curved surface.

Claim 3

Dependent Claim 190 words

A drum assembly comprising: a plastic drum having a top wall, a side wall, and a corner connecting said top and side walls, said assembly including a preformed plastic insert joined to said corner to facilitate lifting the drum assembly, said insert including a first indentation on one side of said corner and a second indentation on the other side of said corner, said insert being confined within a space defined by said top wall as an upper limit and said side wall as an outer limit, said plastic insert including a base, one side of which is joined to said corner, and a ridge extending outwardly from the other side of said base between said indentations, said ridge having a crown which is convex, wherein said side wall is cylindrical and said insert is arcuate and extends partially about the periphery of said drum, the portion of said corner which is not surmounted by said insert forms a curved surface between said top and side walls, and said crown has substantially the same radius of curvature as said curved surface but extends outwardly slightly less than said curved surface.

Claim 4

Dependent Claim 190 words

A drum assembly comprising: a plastic drum having a top wall, a side wall, and a corner connecting said top and side walls, said assembly including a preformed plastic insert joined to said corner to facilitate lifting the drum assembly, said insert including a first indentation on one side of said corner and a second indentation on the other side of said corner, said insert being confined within a space defined by said top wall as an upper limit and said side wall as an outer limit, said plastic insert including a base, one side of which is joined to said corner, and a ridge extending outwardly from the other side of said base between said indentations, said ridge having a crown which is convex, wherein said side wall is cylindrical and said insert is arcuate and extends partially about the periphery of said drum, the portion of said corner which is not surmounted by said insert forms a curved surface between said top and side walls, and said crown has substantially the same radius of curvature as said curved surface but extends outwardly slightly less than said curved surface.

Claim 5

Dependent Claim 207 words

A plastic assembly comprising a blow molded plastic body having an end wall, a side wall, and a corner joining said end wall with said side wall, said corner having a normal corner configuration and at least one modified corner portion displaced inwardly relative to said normal corner configuration, said modified corner portion having a peripheral edge; and a preformed insert joined to said modified corner portion and extending outwardly therefrom no farther than the outer surface of said normal corner portion, said preformed insert including a base, one side of which is engaged with said modified corner portion, said base having a continuous peripheral edge contiguous with the entire peripheral edge of said modified corner portion, and a ridge extending outwardly from the opposite side of said base, at least one indentation being formed in said ridge to facilitate lifting of said assembly, whereby said preformed insert may be placed in a blow mold having a corner configured complementary to said normal corner configuration with said peripheral edge of said base in continuous engagement with the inner surface of said mold to seal off a portion of the corner of said mold and form said modified corner portion as plastic parison is introduced into said mold.

Claim 6

Dependent Claim 207 words

A plastic assembly comprising a blow molded plastic body having an end wall, a side wall, and a corner joining said end wall with said side wall, said corner having a normal corner configuration and at least one modified corner portion displaced inwardly relative to said normal corner configuration, said modified corner portion having a peripheral edge; and a preformed insert joined to said modified corner portion and extending outwardly therefrom no farther than the outer surface of said normal corner portion, said preformed insert including a base, one side of which is engaged with said modified corner portion, said base having a continuous peripheral edge contiguous with the entire peripheral edge of said modified corner portion, and a ridge extending outwardly from the opposite side of said base, at least one indentation being formed in said ridge to facilitate lifting of said assembly, whereby said preformed insert may be placed in a blow mold having a corner configured complementary to said normal corner configuration with said peripheral edge of said base in continuous engagement with the inner surface of said mold to seal off a portion of the corner of said mold and form said modified corner portion as plastic parison is introduced into said mold.

Claim 7

Dependent Claim 31 words

A plastic assembly as recited in claim 3, wherein said base includes a first edge surface flush with said end wall and a second edge surface flush with said side wall.

Claim 8

Dependent Claim 31 words

A plastic assembly as recited in claim 4, wherein said insert is preformed of a plastic and wherein said one side of said base is fused to said modified corner portion.

Claim 9

Dependent Claim 20 words

A plastic assembly as recited in claim 5, wherein said body and said insert are formed of high density polyethylene.

Claim 10

Dependent Claim 27 words

A plastic assembly as recited in claim 3, wherein a pair of indentations are provided, respectively, on opposite sides of said ridge to facilitate lifting said assembly.

Claim 11

Dependent Claim 31 words

A plastic assembly as recited in claim 7, wherein said ridge is shaped adjacent the ends of said insert to allow water to drain from the upper one of said indentations.

Claim 12

Dependent Claim 21 words

A plastic assembly as recited in claim 3, wherein said assembly is a drum assembly and said side wall is cylindrical.

Claim 13

Dependent Claim 28 words

A plastic assembly as recited in claim 3, wherein said side wall is cylindrical and said insert is arcuate and extends partially about the periphery of said drum.

Claim 14

Dependent Claim 28 words

A plastic assembly as recited in claim 3, wherein said side wall is cylindrical and said insert is circular and extends entirely about the periphery of said drum.

Claim 15

Dependent Claim 32 words

A plastic assembly as recited in claim 11, wherein said top wall is a removable lid and wherein a retaining ring cooperates with said means to hold said lid on said drum.

Claim 16

Dependent Claim 17 words

A plastic assembly as recited in claim 3, wherein said ridge has a crown which is convex.

Claim 17

Dependent Claim 17 words

A plastic assembly as recited in claim 3, wherein said ridge has a crown which is flat.

Claim 18

Dependent Claim 28 words

A plastic assembly as recited in claim 3, wherein said ridge extends outwardly from said base at an angle of approximately 45° to said top and side walls.

Claim 19

Dependent Claim 41 words

A plastic assembly as recited in claim 3, wherein said side wall is cylindrical and said base has a first edge surface flush with said top wall and a second edge surface flush with the cylindrical surface of said side wall.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1984-04-27	1984-10-27	1985-04-28	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1988-04-27	1988-10-27	1989-04-28	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1992-04-27	1992-10-27	1993-04-28	$7700.00	Window Closed / Lapsed

Plastic drums and drum assemblies with preformed inserts

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