WO1994012409A1 - Molded plastic container - Google Patents

Molded plastic container Download PDF

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Publication number
WO1994012409A1
WO1994012409A1 PCT/US1992/010106 US9210106W WO9412409A1 WO 1994012409 A1 WO1994012409 A1 WO 1994012409A1 US 9210106 W US9210106 W US 9210106W WO 9412409 A1 WO9412409 A1 WO 9412409A1
Authority
WO
WIPO (PCT)
Prior art keywords
container according
side wall
end walls
container
generally
Prior art date
Application number
PCT/US1992/010106
Other languages
French (fr)
Inventor
Edward James Chase
Original Assignee
Smurfit Plastic Packaging, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Smurfit Plastic Packaging, Inc. filed Critical Smurfit Plastic Packaging, Inc.
Priority to AU32225/93A priority Critical patent/AU3222593A/en
Priority to PCT/US1992/010106 priority patent/WO1994012409A1/en
Publication of WO1994012409A1 publication Critical patent/WO1994012409A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • B65D1/14—Cans, casks, barrels, or drums characterised by shape
    • B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical

Definitions

  • This invention relates to a molded plastic container and more particularly relates to an improved molded plastic, drum-type container of the type used primarily for the storage and shipment of liquid chemical compounds.
  • Containers have been described in a number of US patents, particularly the following US patent nos: 3,050,773; 3,949,877; 4,032,031; 4,170,623; 4,228,122; 4,228,911; 4,257,527; 4,282,974; 4,378,328; 4,529,570; 4,898,296; 4,925,049; 5,018,642; 5,033,639; 5,044,510; and 5,114,659. None of the above patents discloses a container of the type described and claimed herein.
  • Another object of the invention is the provision of a container which has increased compression strength to allow the container to be stacked with other such containers vertically higher than has been possible in the past.
  • Yet another object of the invention is to provide a container with stronger solid end handling rings and intermediate rolling hoops that serve to increase the side wall strength and also facilitate the handling of the container by modern methods.
  • Still another object of the invention is to provide a container end wall arrangement with improved drainage to minimize the possibility of seepage of standing water into a closure.
  • a molded plastic drum-type container of the type used for the storage and transportation of liquid and chemical compounds, comprising: a hollow blow molded body including a generally cylindrical side wall and a pair of integral, round, top and bottom end walls; said side wall being joined to outer edges of said top and bottom end walls and having upper and lower end portions extending above and below said top and bottom end walls; solid compression molded upper and lower handling rings formed integrally with and projecting radially outward from upper and lower edges of said upper and lower portions of said side wall; and a plurality of solid compression molded rolling hoops formed integrally with and projecting radially outward from said side wall; wherein said top end wall has a relatively flat annular outer peripheral portion, and a pair of necked openings.
  • said rolling hoops are arranged spaced from each other above and below a central area of said side wall. More preferably, said rolling hoops are arranged in two pairs spaced from each other.
  • said end and side walls have certain adjacent portions molded to extend axially and radially inward, respectively, to form openings disposed entirely axially inward of said end walls for draining liquid from an upwardly facing surface of a related end wall.
  • the top end wall includes a raised center portion, which is desirably generally I-shaped.
  • the raised center portion is generally co-planar with an upper surface of said upper handling ring.
  • the rolling hoops may be generally rectangular in cross-section, and may present outer vertical surfaces that are concave.
  • said side wall has an outer surface that is generally cylindrical throughout the majority of its height and has areas located immediately axially inwardly adjacent said end walls that are slightly concave.
  • Figure 1 is a fragmentary isometric view of a container according to the present invention.
  • Figure 2 is a side elevational view of the structure illustrated in Figure 1;
  • Figures 3 and 4 are top and bottom plan views, respectively, of the structure illustrated in Figure 1;
  • Figures 5 and 6 are vertical sectional views taken along lines 5-5 and 6-6, respectively, of Figure 3;
  • Figure 7 is an enlarged isometric view of a portion of the structure illustrated in Figure 1;
  • FIG. 8 is a vertical sectional view taken along line 8-8 of Figure 7.
  • a molded plastic drum-type container generally designated 10.
  • the container 10 includes a side wall 20 and a pair of integral top and bottom end walls 30 and 40 respectively.
  • Major portions of the container side and end walls 20, 30 and 40 are formed by a blow molding process; however, certain portions of the container 10, such as handling rings and rolling hoops (both of which are described in further detail below) , are formed and secured to the body of the container 10 by a process including both blow molding and compression molding.
  • Side wall 20 is generally cylindrical throughout the majority of its length, as indicated at 20a, but may have upper and lower portions 20b that are slightly concave.
  • the side wall 20 of the container 10 is provided with two pairs of integral rolling hoops 22 spaced .. vertically from each other above and below the center of the container side wall 20 (this is best seen in Figures 5 and 6) .
  • Each of the rolling hoops 22 is solid, rather than hollow, and is formed and welded to the container, at the same time the body is blow molded, by a compression molding process of the type disclosed in US Patent No. 4,713,207.
  • each rolling hoop 22 is preferably generally rectangular, as shown in the drawings, although, in certain instances, it has been found that it may be advantageous to provide rolling hoops with concave outer surfaces (not shown) .
  • the top end wall 30 has a relatively flat outer portion 32 and a generally I-shaped raised center portion 34 that is approximately in vertical alignment with the upper extremity of the side wall 20.
  • the upper end of the container 10 is provided with a unique drain hole arrangement that prevents water from collecting on the top end wall 30 where it could conceivably seep into one of the closures.
  • a unique drain hole arrangement that prevents water from collecting on the top end wall 30 where it could conceivably seep into one of the closures.
  • adjacent areas of top end wall 30 and side wall 20 are molded to extend axially and radially inwardly, as shown at 38, to provide openings 39 that serve as drain holes.
  • the drain hole openings 39 are located entirely below the lowest outer portion of the upper surface of the top end wall 30 to prevent liquids, such as rainwater, from collecting on the upper end of the container.
  • the structure of the bottom end wall 40 is similar to that of the top end wall 30, except for the filling/ dispensing/venting opening 35 and the raised center portion 32.
  • the bottom wall 40 is relatively flat and is joined to the lower end of the side wall 20, as shown at 47. Also, the side wall 20 has a lower portion 44 projecting downwardly beyond the bottom wall 40. At its lower extremity, side wall 20 has an integral, solid, outwardly projecting handling ring 46 that is similar in construction and operation to the upper handling ring 26.
  • the bottom end wall 40 and side wall 20 have adjacent areas molded to extend axially and radially inward, as shown at 48, to form drain hole openings 49, so that liquid can drain off the container if it is placed upside down, in the same way that it can drain from the top wall 30.

Abstract

A molded plastic drum-type container (10) having a hollow blow molded body with a side wall (20) and integral top (30) and bottom end walls (40). The side wall (20) has a plurality of integral solid compression molded rolling hoops (22) formed therewith and projecting radially outward therefrom between the end walls. The side wall (20) also has portions extending beyond the end walls with integral solid compression molded handling rings projecting radially outward therefrom.

Description

__!__. MOLDED PLASTIC CONTAINER
This invention relates to a molded plastic container and more particularly relates to an improved molded plastic, drum-type container of the type used primarily for the storage and shipment of liquid chemical compounds.
Containers have been described in a number of US patents, particularly the following US patent nos: 3,050,773; 3,949,877; 4,032,031; 4,170,623; 4,228,122; 4,228,911; 4,257,527; 4,282,974; 4,378,328; 4,529,570; 4,898,296; 4,925,049; 5,018,642; 5,033,639; 5,044,510; and 5,114,659. None of the above patents discloses a container of the type described and claimed herein.
It is a primary object of the invention to provide an improved configuration and structural arrangement for a molded plastic, drum-type container of the type used for the storage and shipment of liquid chemical compounds.
Another object of the invention is the provision of a container which has increased compression strength to allow the container to be stacked with other such containers vertically higher than has been possible in the past.
Yet another object of the invention is to provide a container with stronger solid end handling rings and intermediate rolling hoops that serve to increase the side wall strength and also facilitate the handling of the container by modern methods.
Still another object of the invention is to provide a container end wall arrangement with improved drainage to minimize the possibility of seepage of standing water into a closure.
According to the present invention there is provided a molded plastic drum-type container of the type used for the storage and transportation of liquid and chemical compounds, comprising: a hollow blow molded body including a generally cylindrical side wall and a pair of integral, round, top and bottom end walls; said side wall being joined to outer edges of said top and bottom end walls and having upper and lower end portions extending above and below said top and bottom end walls; solid compression molded upper and lower handling rings formed integrally with and projecting radially outward from upper and lower edges of said upper and lower portions of said side wall; and a plurality of solid compression molded rolling hoops formed integrally with and projecting radially outward from said side wall; wherein said top end wall has a relatively flat annular outer peripheral portion, and a pair of necked openings.
Preferably said rolling hoops are arranged spaced from each other above and below a central area of said side wall. More preferably, said rolling hoops are arranged in two pairs spaced from each other.
In a preferred construction said end and side walls have certain adjacent portions molded to extend axially and radially inward, respectively, to form openings disposed entirely axially inward of said end walls for draining liquid from an upwardly facing surface of a related end wall.
Preferably the top end wall includes a raised center portion, which is desirably generally I-shaped. Preferably also, the raised center portion is generally co-planar with an upper surface of said upper handling ring.
The rolling hoops may be generally rectangular in cross-section, and may present outer vertical surfaces that are concave.
In a preferred embodiment said side wall has an outer surface that is generally cylindrical throughout the majority of its height and has areas located immediately axially inwardly adjacent said end walls that are slightly concave. Reference is now made to the accompanying drawings, in which:
Figure 1 is a fragmentary isometric view of a container according to the present invention;
Figure 2 is a side elevational view of the structure illustrated in Figure 1;
Figures 3 and 4 are top and bottom plan views, respectively, of the structure illustrated in Figure 1;
Figures 5 and 6 are vertical sectional views taken along lines 5-5 and 6-6, respectively, of Figure 3;
Figure 7 is an enlarged isometric view of a portion of the structure illustrated in Figure 1; and
Figure 8 is a vertical sectional view taken along line 8-8 of Figure 7. In the drawings there is shown a molded plastic drum-type container generally designated 10.
As best seen in Figures 5 and 6, the container 10 includes a side wall 20 and a pair of integral top and bottom end walls 30 and 40 respectively. Major portions of the container side and end walls 20, 30 and 40 are formed by a blow molding process; however, certain portions of the container 10, such as handling rings and rolling hoops (both of which are described in further detail below) , are formed and secured to the body of the container 10 by a process including both blow molding and compression molding.
Side wall 20 is generally cylindrical throughout the majority of its length, as indicated at 20a, but may have upper and lower portions 20b that are slightly concave.
The side wall 20 of the container 10 is provided with two pairs of integral rolling hoops 22 spaced .. vertically from each other above and below the center of the container side wall 20 (this is best seen in Figures 5 and 6) . Each of the rolling hoops 22 is solid, rather than hollow, and is formed and welded to the container, at the same time the body is blow molded, by a compression molding process of the type disclosed in US Patent No. 4,713,207.
The contour of each rolling hoop 22 is preferably generally rectangular, as shown in the drawings, although, in certain instances, it has been found that it may be advantageous to provide rolling hoops with concave outer surfaces (not shown) .
Referring to Figures 5 to 7, it will be seen that the side wall 20 has, at its upper extremity, an extended portion 24 that projects axially upwardly beyond the top end wall 20. At its upper extremity the extended portion 24 has formed integrally therewith a solid, radially outwardly projecting, handling ring 26, which, like the rolling hoops 22, may be formed and joined to the side wall body by a combination of blow molding and compression molding processes.
As best seen in Figures 3, 5 and 6, the top end wall 30 has a relatively flat outer portion 32 and a generally I-shaped raised center portion 34 that is approximately in vertical alignment with the upper extremity of the side wall 20.
Extending through the flat outer portion of the top end wall 30 on opposite sides of raised center portion 34 are a pair of filling/dispensing/venting openings 35, each of which is surrounded by an upwardly projecting neck 36 adapted to receive a closure (not shown) .
The upper end of the container 10 is provided with a unique drain hole arrangement that prevents water from collecting on the top end wall 30 where it could conceivably seep into one of the closures. As best seen in Figure 8, in certain locations, adjacent areas of top end wall 30 and side wall 20 are molded to extend axially and radially inwardly, as shown at 38, to provide openings 39 that serve as drain holes. The drain hole openings 39 are located entirely below the lowest outer portion of the upper surface of the top end wall 30 to prevent liquids, such as rainwater, from collecting on the upper end of the container.
The structure of the bottom end wall 40 is similar to that of the top end wall 30, except for the filling/ dispensing/venting opening 35 and the raised center portion 32.
The bottom wall 40 is relatively flat and is joined to the lower end of the side wall 20, as shown at 47. Also, the side wall 20 has a lower portion 44 projecting downwardly beyond the bottom wall 40. At its lower extremity, side wall 20 has an integral, solid, outwardly projecting handling ring 46 that is similar in construction and operation to the upper handling ring 26.
The bottom end wall 40 and side wall 20 have adjacent areas molded to extend axially and radially inward, as shown at 48, to form drain hole openings 49, so that liquid can drain off the container if it is placed upside down, in the same way that it can drain from the top wall 30.

Claims

1. A molded plastic drum-type container of the type used for the storage and transportation of liquid and chemical compounds, comprising: a hollow blow molded body including a generally cylindrical side wall and a pair of integral, round, top and bottom end walls; said side wall being joined to outer edges of said top and bottom end walls and having upper and lower end portions extending above and below said top and bottom end walls; solid compression molded upper and lower handling rings formed integrally with and projecting radially outward from upper and lower edges of said upper and lower portions of said side wall; and a plurality of solid compression molded rolling hoops formed integrally with and projecting radially outward from said side wall; wherein said top end wall has a relatively flat annular outer peripheral portion, and a pair of necked openings.
2. A container according to claim 1, wherein said rolling hoops are arranged spaced from each other above and below a central area of said side wall.
3. A container according to claim 2, wherein said rolling hoops are arranged in two pairs spaced from each other.
4. A container according to claim 1, wherein said end and side walls have certain adjacent portions molded to extend axially and radially inward, respectively, to form openings disposed entirely axially inward of said end walls for draining liquid from an upwardly facing surface of a related end wall.
5. A container according to claim 1, wherein said top end wall includes a raised center portion.
6. A container according to claim 5, wherein said raised center portion is generally I-shaped.
7. A container according to claim 5, wherein said raised center portion is generally co-planar with an upper surface of said upper handling ring.
8. A container according to claim 7, wherein said raised center portion is generally I-shaped.
9. A container according to claim 1, wherein said rolling hoops are generally rectangular in cross-section.
10. A container according to claim 1, wherein said rolling hoops present outer vertical surfaces that are concave.
11. A container according to claim 1, wherein said side wall has an outer surface that is generally cylindrical throughout the majority of its height and has areas located immediately axially inwardly adjacent said end walls that are slightly concave.
PCT/US1992/010106 1992-11-23 1992-11-23 Molded plastic container WO1994012409A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU32225/93A AU3222593A (en) 1992-11-23 1992-11-23 Molded plastic container
PCT/US1992/010106 WO1994012409A1 (en) 1992-11-23 1992-11-23 Molded plastic container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1992/010106 WO1994012409A1 (en) 1992-11-23 1992-11-23 Molded plastic container

Publications (1)

Publication Number Publication Date
WO1994012409A1 true WO1994012409A1 (en) 1994-06-09

Family

ID=22231557

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/010106 WO1994012409A1 (en) 1992-11-23 1992-11-23 Molded plastic container

Country Status (2)

Country Link
AU (1) AU3222593A (en)
WO (1) WO1994012409A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0704379A2 (en) * 1994-09-27 1996-04-03 Sonoco Products Company One-piece blow-molded closed plastic drum with handling ring and method of molding same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4228911A (en) * 1978-04-08 1980-10-21 Mauser-Kommandit Gesellschaft Roller chimes for closed head drums
US4349119A (en) * 1980-07-16 1982-09-14 Letica Corporation Container construction
US4901876A (en) * 1988-05-06 1990-02-20 Spectrum International, Inc. All-purpose utility crate
US4903852A (en) * 1984-10-04 1990-02-27 Mitsui Petrochemical Industries, Ltd. Plastics container
US4925049A (en) * 1987-03-16 1990-05-15 Mauser-Werke Gmbh Blow-molded thermoplastic drum having improved integral bearing and transport rings

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4228911A (en) * 1978-04-08 1980-10-21 Mauser-Kommandit Gesellschaft Roller chimes for closed head drums
US4349119A (en) * 1980-07-16 1982-09-14 Letica Corporation Container construction
US4903852A (en) * 1984-10-04 1990-02-27 Mitsui Petrochemical Industries, Ltd. Plastics container
US4925049A (en) * 1987-03-16 1990-05-15 Mauser-Werke Gmbh Blow-molded thermoplastic drum having improved integral bearing and transport rings
US4901876A (en) * 1988-05-06 1990-02-20 Spectrum International, Inc. All-purpose utility crate

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0704379A2 (en) * 1994-09-27 1996-04-03 Sonoco Products Company One-piece blow-molded closed plastic drum with handling ring and method of molding same
EP0704379A3 (en) * 1994-09-27 1996-05-15 Sonoco Products Co
AU694151B2 (en) * 1994-09-27 1998-07-16 Gbc Holding Co. One-piece, blow-molded closed plastic drum with handling ring and method of molding same
EP0918017A2 (en) * 1994-09-27 1999-05-26 Sonoco Products Company One-piece blow-molded closed plastic drum with handling ring and method of moulding same
EP0918017A3 (en) * 1994-09-27 1999-06-02 Sonoco Products Company One-piece blow-molded closed plastic drum with handling ring and method of moulding same
US6024245A (en) * 1994-09-27 2000-02-15 Greif Bros. Corp. Of Ohio, Inc. One-piece blow-molded closed plastic drum with handling ring and method of molding same
US6026980A (en) * 1994-09-27 2000-02-22 Greif Bros. Corp. Of Ohio, Inc. One-piece blow-molded closed plastic drum with handling ring and method of molding same

Also Published As

Publication number Publication date
AU3222593A (en) 1994-06-22

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