US3401864A - Lid seal for shipping containers - Google Patents

Lid seal for shipping containers Download PDF

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Publication number
US3401864A
US3401864A US669751A US66975167A US3401864A US 3401864 A US3401864 A US 3401864A US 669751 A US669751 A US 669751A US 66975167 A US66975167 A US 66975167A US 3401864 A US3401864 A US 3401864A
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US
United States
Prior art keywords
container
lip
cover
seal
rib
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US669751A
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English (en)
Inventor
Schuringa Jan Harm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inland Steel Co
Original Assignee
Inland Steel Co
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 Inland Steel Co filed Critical Inland Steel Co
Application granted granted Critical
Publication of US3401864A publication Critical patent/US3401864A/en
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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
    • B65D9/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of wood or substitutes therefor
    • B65D9/02—Containers of curved cross-section, e.g. cylindrical boxes
    • 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
    • B65D15/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
    • B65D15/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums
    • B65D15/04—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made by winding or bending paper
    • B65D15/06—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made by winding or bending paper with end walls made of metal
    • 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
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/10—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by form of integral or permanently secured end closure

Definitions

  • This invention relates to shipping containers.
  • it relates to shipping containers of the type made of brous material such as kraft paper, paperboard, cardboard and similar materials.
  • the container body has an open end and a chime which includes an internal circumferential rib adjacent the open end.
  • Such shipping containers must be capable of being securely closed by a cover or lid to contain their contents.
  • the cover may be of sheet metal, libre, Wood or other suitable material.
  • Wood such as plywood, is therefore sometimes used for the cover or lid, but this material also has certain disadvantages in this application since it is not easily formed into the shapes required. For this reason a paperboard cover or a cover made of easily formed plastic or brous materials is preferred.
  • Such a cover is generally made of a single layer of material formed with a circumferential rim or skirt which overlies the open end of the container and is crimped thereto by the application of a metal band or other suitable closing device. Because the line of contact between the open end of the container body and the cover is often irregular, leakage is sometimes experienced at this point.
  • a metal rim or band is also occasionally used to reinforce the chime area of the container, and this band may be turned or rolled over so that a portion is exposed to the inside of the container body. If the container is used for transporting aggressive commodities a portion of the reinforcing band of the chime is thus exposed to the container contents with resultant deleterious effects.
  • the invention shall provide for the construction of strong, rigid container covers made of fibrous materials such as kraft paper, paperboard, cardboard and the like.
  • a more detailed object is to provide a shipping con tainer closure member which etects a seal in a relatively protected region of the shipping container which is spaced from the outermost portion of the container mouth. It is particularly contemplated that the seal will be effective against the internal portion of the chime area of the container whereby the crimping or clamping action of the cover member does not eifect the quality or the effectiveness of the seal. In greater particularity, it is contemplated that a peripheral lip seal will be provided which mates with an inner surface of the inturned circumferential rib of the container chime, and which may be further reinforced or clenched in place to provide a stiff yet resilient seal.
  • FIGURE 1 is a fragmentary cross-sectional elevation of a shipping container having a closure assembly constructed according to the present invention
  • FIG. 2 is a rst alternative embodiment of the shipping container closure of FIG. l;
  • FIG. 3 is a second alternative embodiment of the shipping container closure of FIG. 1;
  • FIG. 4 is a third alternative embodiment of the shipping container closure of FIG. 1.
  • FIG. 1 a cross-sectional View of the chime area and closure of a shipping container 11.
  • the container is made of brous material, but it should be understood that a metallic container body can be used as well.
  • the container Wall 12 is formed with an internal circumferential rib 13 adjacent the open end or mouth of the container body 11.
  • a metal reinforcing ring 15 is provided which reinforces the open end of the container body 11 and maintains the desired shape of the chime.
  • the shipping container further comprises a cover member indicated generally at 16 which is rnade of iibrous, nonemetallic material.
  • the cover is made up of two parts, an outer layer element 17 and an inner layer element 18.
  • the outer element 17 in the embodiment of FIG. 1 consists of a substantially flat disk-shaped portion 20 surrounded by a circumferential step or convolution 21 and an annular area 22 which meets a downturned rim or flan-ge 23.
  • the latter element is formed as a downturned edge which slips over and engages the mouth of the container body 11.
  • the cover 16 may be secured to the container body 11 in any suitable manner; for exampleJby a split clamping ring 25 which opens at a piont (not shown) along its periphery ⁇ so that it may be slipped over the rim 23 and clamped tight against the chime to secure the cover 16 in place.
  • a split clamping ring 25 which opens at a piont (not shown) along its periphery ⁇ so that it may be slipped over the rim 23 and clamped tight against the chime to secure the cover 16 in place.
  • the inner layer element 18 of the cover 16 is formed as a separate member which bears against the internal circumferential rib 13 to effect a seal in that region. This is accomplished by providing the inner layer member 18 with a resilient peripheral lip or ange 26 which is resiliently pressed against the internal rib 13 when the lid 16 is clamped into place. Before assembly, the free distance from the outer periphery of the lip 26 to the outer member flange area 22 is ⁇ greater than the depth of the internal rib 13 from the mouth of the container body 11, so that the lip is resiliently deflected when assembled. In the embodiment illustrated in FIG.
  • the peripheral edge of the lip 26 is caused to be spaced away from the ange area of the outer layer element 17 by the circumferential step 21 which acts as an annular or reinforcement member.
  • the inner layer element 18 is initially formed with an upstanding lip 26 which is somewhat resilient due to the natural resiliency of the fibrous material itself.
  • this resiliency is considerably enhanced by the nesting of the inner layer member 18 within the corresponding depression caused by the circumferential step 21 in the outer layer member 17.
  • the inner periphery of the lip 26 is doubly supported against bending, and the natural resiliency of the lip is considerably enhanced as a result.
  • the lip or flange 26 of the inner layer element 18 occasionally has the inclination to resume its original flat form, and thus to decrease or eli-minate the spacing between its upper periphery and the flanged area 22 of the outer layer 17. This is particularly true when the inner layer 18 is made of paperboard or the like which might be exposed to moisture. As a result, the lip 26 may disengage from the rib 13, thereby irnpairing the efficiency of that seal. For this reason the circumferential step 21 is formed so that the step serves as an annular spacer element to preserve the resilience and spacing of the lip 26 relative to the flange area 22 of the outer layer 17.
  • This construction has the additional advantage of providing good drainage qualities to the top of the container, and providing or promoting the stacking of one individual container upon another through the formation of a mating surface formed on the Ibottom of the containers (not shown).
  • the central portion of the outer layer 17 is reinforced by a corresponding portion of the inner layer 18, while only the single thickness of the outer layer in the region of the flange area 22 needs to be deformed to form the rim or skirt 23.
  • elements 17, 18 which are advantageously made of fibrous material such as paperboard, either or both of them may also be made of a suitable plastic material, or of metal. Such constructions also enjoy the advantages afforded by the present invention.
  • the lip 26 When applied to a container body 11, the lip 26 is pressed against the upper surface of the inner rib 13 by the clamping action of the clamping ring as it is contracted through a suitable clamping or contracting means (not shown). This accomplishes the purpose of sealing the container in two areas, both along the mouth of the container adjacent the metal reinforcing ring 15, and along the upper surface of the inner rib 13 through the action of the resilent lip 26. As a result, a double seal is obtained and the contents of the container are also prevented from coming into contact with the metal reinforcing ring 15.
  • a separate supporting ring 30 is added which additionally enhances the resilient qualities of the lip or ange 26.
  • the supporting ring 30 is made in annular form CII from rubber, plastic or other resilient material, and is positioned in the gap between the lip 26 and the flange area 22 of the outer element 17 so as to provide a slight wedging action.
  • the sealing effect is the same as that of the circumferential step 21 in the embodiment illustrated in FIG. 1.
  • the free outer diameter of the deflected portion of the lip 26 may be made equal or even slightly greater than the inner diameter of the container body 11 adjacent the internal rib 13. In this way the thinouter edge of the lip 26 when in place will be clenched and pressed tightly against the container wall 12 above the internal rib 13, thus enhancing the sealing properties of the closure.
  • FIG. 3 another alternative embodiment is shown.
  • the circumferential step 21 of the preceding embodiments is omitted, and the annular support element consists solely of an independent supporting ring 31 as shown.
  • the layer element 18 is preferably bonded by gluing or similar means to the outer layer element to prevent the wedging action of the supporting ring 41 from separating the two elements 17, 18 from their region of contact at their centers. This construction may be preferred when the containers are to be handled by means of pallets, rather than being stacked.
  • the outer layer element 17 is formed with a separate convolution 32 which substantially duplicates the supporting function of the circumferential step 21 of the embodiment of FIG. 1, but in a different way,
  • the convolution 32 is formed at a radius such that a circumferential supporting rib 33 is formed at a point corresponding to the position of the supporting rings 30, 31 in the embodiments illustrated in FIGS. 2 and 3.
  • This rib 33 therefore engages the lip 26 at a point spaced from its innermost diameter, and therefore is able to increase the stiffness and resilience of the lip 26 because of the greater leverage available at this point.
  • the convolution 32 which appears on the exterior of the cover 16 also promotes stacking if the bottom of the container (not shown) is formed with a corresponding surface. This construction does not have a central upraised portion as in the embodiments of FIGS. 1 and 2, and therefore lends itself to handling by means of pallets.
  • the preferred construction contemplates that the inner and outer layer elements 17, 18 shall be secured in their central portion by an adhesive or other suitable means. Alternatively they may comprise separate parts loosely placed on top of one another, although certain advantages of stiffness and strength may be lost in some degree thereby.
  • an improved cover assembly comprising an outer layer element and an inner layer element, said outer layer element having a central portion and a circumferential flange portion adapted to surround the open end of said body, and said inner layer element having a central portion engaging the central portion of said outer layer element and a resilient circumferential lip having a diameter greater than the internal diameter of said internal circumferential rib, and said lip having a periphery which is spaced from said outer layer element by a free distance greater than the axial distance from the end opening of said body to said circumferential internal rib, whereby a seal is effected upon the engagement of said cover and body through the resilient deflection of said lip against said circumferential internal rib.
  • a cover assembly as defined in claim 1 in which the free outer diameter of said lip when assembled against said internal rib is greater than the inner diameter of the open end of said body, whereby said lip is clenched against said inner diameter.
  • a cover assembly as defined in claim 1 which includes an annular support element between said external layer element and said lip, said support element being spaced inwardly from the outer periphery of said lip.
  • annular support element comprises an annular ridge formed in said louter layer element and disposed in supporting relationship to said lip.
  • annular support element consists of an annular internal ridge Iormed in said outer layer element and disposed in supporting relationship to said lip at a point spaced from the inner diameter of said lip.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Closures For Containers (AREA)
US669751A 1966-09-29 1967-09-22 Lid seal for shipping containers Expired - Lifetime US3401864A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4366466 1966-09-29

Publications (1)

Publication Number Publication Date
US3401864A true US3401864A (en) 1968-09-17

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ID=10429760

Family Applications (1)

Application Number Title Priority Date Filing Date
US669751A Expired - Lifetime US3401864A (en) 1966-09-29 1967-09-22 Lid seal for shipping containers

Country Status (4)

Country Link
US (1) US3401864A (de)
BE (1) BE703593A (de)
DE (1) DE1998474U (de)
NL (1) NL6712135A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921849A (en) * 1973-12-03 1975-11-25 Itw Ltd Sealing caps
US20080308519A1 (en) * 2004-07-07 2008-12-18 Peter Antony Farrar Beverage Container

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391774A (en) * 1937-08-12 1945-12-25 Continental Can Co Container
US3186620A (en) * 1961-10-18 1965-06-01 Inland Steel Co Shipping container

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391774A (en) * 1937-08-12 1945-12-25 Continental Can Co Container
US3186620A (en) * 1961-10-18 1965-06-01 Inland Steel Co Shipping container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921849A (en) * 1973-12-03 1975-11-25 Itw Ltd Sealing caps
US20080308519A1 (en) * 2004-07-07 2008-12-18 Peter Antony Farrar Beverage Container

Also Published As

Publication number Publication date
BE703593A (de) 1968-02-01
DE1998474U (de) 1968-12-12
NL6712135A (de) 1968-04-01

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