EP0354762A1 - Récipient en polymère - Google Patents

Récipient en polymère Download PDF

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Publication number
EP0354762A1
EP0354762A1 EP89308054A EP89308054A EP0354762A1 EP 0354762 A1 EP0354762 A1 EP 0354762A1 EP 89308054 A EP89308054 A EP 89308054A EP 89308054 A EP89308054 A EP 89308054A EP 0354762 A1 EP0354762 A1 EP 0354762A1
Authority
EP
European Patent Office
Prior art keywords
container
lid
lid ring
stiffening
ring
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.)
Withdrawn
Application number
EP89308054A
Other languages
German (de)
English (en)
Inventor
Nigel Alastair Dent
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.)
RPC Containers Ltd
Original Assignee
Reed Packaging Ltd
RPC Containers Ltd
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 Reed Packaging Ltd, RPC Containers Ltd filed Critical Reed Packaging Ltd
Publication of EP0354762A1 publication Critical patent/EP0354762A1/fr
Withdrawn legal-status Critical Current

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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
    • B65D11/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material
    • B65D11/20—Details of walls made of plastics material
    • B65D11/22—Reinforcing for strengthening parts of members
    • B65D11/26—Local reinforcements, e.g. adjacent to closures
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00435—Lids secured to an intermediate ring or like annular member fixed to the container mouth

Definitions

  • This invention relates to polymeric containers.
  • the invention concerns polymeric containers having a lid ring in which a lid is received, the lid being releasable by application of a suitable de-lidding tool.
  • the invention is not restricted to lever lidded polymeric containers, and another aspect of the invention concerns the base region of a polymeric container, as more fully explained below.
  • a further problem which arises in relation to lid rings for polymeric containers concerns de-lidding by the end user. This can be difficult. For example, sometimes the application of a screw driver or like de-­lidding tool does not easily free the lid. Again, this problem is more noticeable where the lid is a clip fit.
  • the present invention provides a lid ring for a polymeric container having means providing a variation in stiffness of the ring in the circumferential direction, whereby lid releasing means may be applied to a region of relatively high stiffness of the ring.
  • the lid ring is provided with locally higher stiffening than elsewhere, whereby both insertion of a polymeric lid and removal of the same are facilitated.
  • the extra stiffness is provided at at least one location where it is desired to apply a de-­lidding force.
  • the variation in the stiffening of the lid ring is arranged so that the region of relatively lower stiffness is such that flexing is facilitated in the direction necessary for insertion of a lid.
  • the stiffening of the ring locally is arranged so that the stiffness necessary to resist distortion when a de-lidding tool is applied, is increased.
  • the present invention provides a polymeric container having bottom and side walls defining bottom and side surfaces of the container, and having a stiffening zone extending around at least a portion of a periphery of the container at the bottom edge thereof, said stiffening zone being located within the interior angle between said bottom and side surfaces of the container and providing an internal surface connecting the walls defining said bottom and side surfaces.
  • a stiffening zone is provided in the base region of the container. This zone extends around at least a portion of the periphery of the container.
  • the stiffening zone is located at the bottom edge of the container, and is located within the interior angle between the bottom and side surfaces of the container, as seen in a vertical cross-section through the container.
  • the stiffening zone itself provides an annular internal surface connecting the bottom and side surfaces of the container.
  • a paint container 10 of polymeric material comprises a base region 12 and a lid receiving region 14, together with a cylindrical side wall 16.
  • lid ring 18 Welded onto the container body side wall 16 is a lid ring 18 in which a lid (not shown) is received.
  • the lid ring is separately moulded and welded to side wall 16 ultrasonically, or in any other suitable way.
  • the lid is a positive clip fit into the inner lip region 20 of lid ring 18.
  • lid ring 18 comprises an outer portion 22 which is of cylindrical form and which in the welded-up state abuts the upper portion of the container side wall 16.
  • the lid ring further comprises an inner portion 24 which extends inwardly and downwardly with respect to portion 22 at an acute included angle with respect thereto.
  • Inner portion 24 has at its inner end the lip region 20 to receive the lid (not shown).
  • the container 10 and the lid ring 18 are separately moulded in the same polymeric materials, for example polypropylene for water based paints and polyester for solvent based paints.
  • the load bearing capability of the assembled container is enhanced by the provision of stiffening means in the lid ring 18.
  • the stiffening means comprises ribs or flanges 26 provided at regular intervals all around the circumference of the lid ring. In Fig. 2, only a representative number of the ribs 26 are shown. The ribs 26 provide a stiffening effect between the inner and outer portions 24 and 22, respectively, of the lid ring 18.
  • each rib has radially inner and outer extremities 28 and 30, and a lower edge 32.
  • the extremity 30 is integral with the wall 16. At its upper extremity each rib extends into the join between portions 22 and 24 of the lid ring.
  • the degree of flexibility of lip region 20 of lid ring 18 is such that the lid insertion or lidding process is accomplished relatively easily.
  • rib extension portion 38 is defined by exposed edges 39 and 40, profile 42 of lip region 20, and non-­exposed extremities 28, 41.
  • the extremity 41 is formed integrally with a flange 43 extending circumferentially in the higher stiffness regions only.
  • ribs 26 are provided with the rib extension portions 38 and flange 43 on three only of the ribs, designated 44, 46 and 48, at each of the locations 32, 32 and 36.
  • the extra stiffening thus provided enables de-lidding to be performed relatively easily.
  • tool-receiving means in the form of a screwdriver slot 50.
  • This enables easy introduction of a screwdriver for application of a suitable de-lidding force to the lid.
  • a slight modification of the profile of the lid ring 18 is provided in this region, as shown in Fig. 3.
  • the extra stiffness provided by the rib extension portions 38 enables the lip region 20 to resist the load applied by the screwdriver to the lid, whereby de-lidding is easily performed.
  • ribs 26 which are not provided with the stiffening extensions 38 may be regarded as stiffened ribs which have been relieved by the removal of the said extensions.
  • the base 12 of container 10 is formed with a stiffening zone 60 extending, in annular form, around the periphery of the base.
  • the stiffening zone is located within the interior angle defined between the bottom and side surfaces 62, 64 respectively, of the container.
  • the stiffening zone provides an internal surface 66 connecting the walls defining the bottom and side surfaces, namely bottom wall 68 and side wall 16.
  • Extra wall 70 thus provides a smooth and inclined connection between these walls, which latter thus terminate in the downward and outward directions respectively at the edges 72 and 74 of annular surface 66.
  • stiffeners 76 in the form of ribs or flanges located on the outer side of extra wall 70 and being of generally wedge-shaped cross-section defined between the surface 78 forming the bottom of the container, inner surface 80 of wall 16 at its lowermost portion, and sloping inner surface 82 of extra wall 70.
  • Figs. 5 and 6 of the drawings show a locator channel 84 which is moulded in the base of the container.
  • the channel 84 has a depth which smoothly increases to a maximum, and terminates in an end wall.
  • the channel is provided for assembly purposes. Its internal surface provides a smooth continuation of the surface 66 of wall 70.
  • the above embodiments provide the following notable advantages.
  • the lid ring there is of course the improved ease of lidding and de-lidding, and such improvements are achieved without major change in the design of the lid ring itself.
  • the lid ring is both more flexible so far as lid insertion is concerned, and locally strengthened to facilitate lid removal.
  • simple identification is provided for the location at which a screwdriver or like de-lidding tool should be applied.
  • the consumption of polymeric material is somewhat reduced, for manufacturing purposes.
  • the stiffening zone in the base region of the polymeric container the following advantages are provided by the above embodiment. These include the fact that no change is provided in the exterior dimensions of the container. There is an insignificant effect on the internal dimensions of the container. Moreover, tests show that the extra stiffness provided by the stiffening zone provides a more uniform weight transfer between stacked containers whereby a reduction in side wall thickness can be achieved while maintaining resistance to buckling. Also, the stiffening ribs or flanges provided in the stiffening zone are able to exert their stiffening effect while nevertheless the container still has a smooth internal surface. The stiffening zone is provided while nevertheless maintaining economy of polymeric material used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP89308054A 1988-08-09 1989-08-08 Récipient en polymère Withdrawn EP0354762A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888818836A GB8818836D0 (en) 1988-08-09 1988-08-09 Plastic containers
GB8818836 1988-08-09

Publications (1)

Publication Number Publication Date
EP0354762A1 true EP0354762A1 (fr) 1990-02-14

Family

ID=10641798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89308054A Withdrawn EP0354762A1 (fr) 1988-08-09 1989-08-08 Récipient en polymère

Country Status (2)

Country Link
EP (1) EP0354762A1 (fr)
GB (1) GB8818836D0 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050000A1 (fr) * 1980-10-08 1982-04-21 Black & Decker Inc. Récipient pour liquide tel que récipient pour peinture
EP0144197A2 (fr) * 1983-12-02 1985-06-12 MB GROUP plc Récipient
WO1988005015A1 (fr) * 1987-01-12 1988-07-14 Reed Packaging Limited Recipients avec couvercle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050000A1 (fr) * 1980-10-08 1982-04-21 Black & Decker Inc. Récipient pour liquide tel que récipient pour peinture
EP0144197A2 (fr) * 1983-12-02 1985-06-12 MB GROUP plc Récipient
WO1988005015A1 (fr) * 1987-01-12 1988-07-14 Reed Packaging Limited Recipients avec couvercle

Also Published As

Publication number Publication date
GB8818836D0 (en) 1988-09-14

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB NL

17P Request for examination filed

Effective date: 19900414

17Q First examination report despatched

Effective date: 19920623

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: RPC CONTAINERS LIMITED

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930105