WO1989011423A1 - Couvercle a onglets - Google Patents

Couvercle a onglets Download PDF

Info

Publication number
WO1989011423A1
WO1989011423A1 PCT/AU1989/000227 AU8900227W WO8911423A1 WO 1989011423 A1 WO1989011423 A1 WO 1989011423A1 AU 8900227 W AU8900227 W AU 8900227W WO 8911423 A1 WO8911423 A1 WO 8911423A1
Authority
WO
WIPO (PCT)
Prior art keywords
lug
cover
ledge
portions
narrower
Prior art date
Application number
PCT/AU1989/000227
Other languages
English (en)
Inventor
Douglas C. Duffy
Original Assignee
Rheem Australia Limited
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 Rheem Australia Limited filed Critical Rheem Australia Limited
Publication of WO1989011423A1 publication Critical patent/WO1989011423A1/fr

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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0233—Removable lids or covers without integral tamper element secured by rolling or other plastic deformation
    • 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
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00027—Stackable lids or covers
    • 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
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00064—Shape of the outer periphery
    • B65D2543/00074—Shape of the outer periphery curved
    • B65D2543/00092—Shape of the outer periphery curved circular
    • 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
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00277—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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B65D2543/00509—Cup
    • 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
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • 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
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00555—Contact between the container and the lid on the inside or the outside of the container on both the inside and the outside
    • 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
    • B65D2543/00953—Sealing means
    • B65D2543/00962—Sealing means inserted
    • B65D2543/00972—Collars or rings

Definitions

  • This invention relates to a mass-produced metal cover or lug-cover for a pail or drum. It has a particular application in the case of a multi-lugged lug-cover of the general type illustrated in the accompanying Figures 1 and 10, hereinafter referred to as a lug-cover.
  • the invention concerns the provision of new features in a lug-cover for the purpose of substantially preventing the problem of lug-covers jamming or binding together after having been transported in stacks.
  • the problem has been more evident in palletised stacks particularly when other loads are superimposed but known types also tend to jam together even under their own weight with the influence of vibration in the transportation environment. Jamming together is likely to be a greater problem when the lug-covers have been painted or lacquered. It is to be understood that normal practice is to transport quantities of empty pails separately from their lug-covers prior to filling and sealing, thus for convenience the lug-covers are transported on pallets in stacks containing typically 50 or more.
  • the invention consists of a lug- cover to close and seal a container opening having a curled rim extending around the opening, said lug-cover comprising a press formed sheet metal article including; a central substantially planar circular portion; a corner radius extending outwardly and upwardly from the circumference of the central portion; a drawn wall extending upwardly from the uppermost extent of the corner radius; a stepped ledge in the drawn wall extending circumferentially around the drawn wall and dividing it into two substantially cylindrical form lower and upper strips joined by said stepped ledge; a curved gasket groove extending upwardly and outwardly from the top edge of said upper strip then downwardly and outwardly to meet a substantially cylindrical peripheral strip extending downwardly a short distance; and a plurality of spaced-apart lugs extending downwardly from the lower edge of said peripheral strip; and wherein said stepped ledge is circumferentially divided into first, narrower portions and second, wider portions alternately located around the stepped edge.
  • each narrower ledge portion has a different circumferential extent compared with other narrower ledge portions in the lug-cover.
  • each narrower ledge portion is coextensive with its adjacent wider ledge portions and upper and narrower strips of the drawn wall via smoothly radiused transition regions.
  • the width of the wider ledge portions is in the range of twice to four times the metal thickness of the lug- cover in which it is formed.
  • the width of the wider ledge portion is approximately three times the metal thickness of the lug- cover in which it is formed.
  • the diameter at the location of the upper strip is formed to provide a narrow band of the lug-cover having a tight fit without clearance between the lug-cover and the opening in the top of the pail when the lug-cover is sealed to the pail.
  • the height dimension of the upper strip is selected to be as small as possible consistent with the provision of said tight fit between the lug-cover and the opening in the top of the pail.
  • the lower strip is formed to provide a width difference between the wider and narrower ledge portions at least equal to the thickness of the lug-cover.
  • the lower strip is formed to provide a width difference between the wider and narrower ledge portions which is 1.5 times the thickness of the lug-cover.
  • the significance of the preference for minimising the height dimension of the upper strip is that the superior performance, required of the lug-cover to pail seal as a whole in transportation of dangerous goods, is aided by a tight size-fbr-size fit between the lug- cover and the mouth of the pail.
  • the unusually pronounced inward and upward deformation of the lugs required in this seal tends to tighten the fit between the lug-cover and the pail by inward deformation of the pail wall. If extended too far down the drawn wall of the lug-cover the tightness would tend to make very d-Lfficult the removal of the lug-cover.
  • corner radius measured at its outside surface is at least five times the metal thickness of the sheet metal forming the lug-cover.
  • the lugs are formed into a first, upper, radially outwardly flared portion and second, lower, unflared or lesser flared portion downwardly depending f om the lower end of said first portion, wherein the first and second portions are positioned and dimensioned to be effective in providing support between adjacent l ke lug-covers in a .stack by the end extremities of lugs of one lug-cover engaging a part of the first flared portion of the lug-cover below it in the stack.
  • the first flared portion of the lugs is at an angle in the range 5 to 10 degrees from the vertical.
  • the upper flared portion of the lugs is at an angle of 8 degrees from the vertical.
  • the invention consists also of a method of forming a sheet metal lug-cover for a pail comprising the steps of:
  • the second operation form into a third operation component having a gasket groove formed at the top of the drawn wall, an angularly outwardly flared upper lug portion and a lower, non-flared or less flared lug portion and a stepped ledge formed in the drawn wall and comprising first, narrower portions and second, wider portions alternately located around the stepped ledge;
  • Figure 1 is an unsealed reduced size part- elevation, part-section view of a metal lug-cover according to the invention.
  • Figure 2 is projected plan view of the lug-cover of Figure 1.
  • Figure 3 is a first schematic cross-sectional view showing only the cutting plane III -III as indicated in Figure 2.
  • Figure 4 is a second schematic cross-sectional view showing only the cutting plan IV- IV as indicated in Figure 2.
  • Figure 5 shows to an enlarged scale a cross- section of the peripheral region of a metal lug-cover according to the invention in schematically depicted engagement with the rim of a pail prior to crimping the lugs.
  • Figure 6(a) shows to an enlarged scale a cross-sectioned detail of the peripheral region of a metal lug -cover according to this invention in engagement with the peripheral region of an identical lug-cover when stacked together as for storage and transportation.
  • Figure 6(b) shows the same features as Figures 6(a) in a cross section angularly displaced from the section shown in Figure 6(a) .
  • Figure 7 shows to a reduced scale a portion of the lug-cover of Figure 1 showing its form after the first pressing operation in its manufacture.
  • Figure 8 shows to an unsealed reduced size, mating portions of male and female halves of a forming die, show open, used to perform the third pressing operation in the manufacture of the lug-cover according to the invention and between the die halves is shown in cross section a portion of the lug-cover after the second and before the third pressing operation in its manufacture.
  • Figure 9 shows to an unsealed reduced size portions of the die halves of Figure 8, shown schematically in cross- section.
  • Figure 10 shows plan, elevation and part section views of a known type of lug-cover over which the present invention provides advantages.
  • the circular lug-cover 10 comprises a generally flat central region 12 which extends at its radially outer extremity via a corner radius into a drawn wall extending vertically upwardly from the centre region 12.
  • the drawn wall is formed to comprise four distinct portions as follows: -
  • a substantially cylindrical but not perfectly cylindrical form lower strip 17 extends upwardly
  • a narrower portion stepped ledge 18 in Figure 3 and a wider portion stepped ledge 19 in Figure 4 extend outwardly and slightly upwardly f om the top extremity of the lower strip 17, and a cylindrical upper strip 20 extends upwardly from the upper extremities of the stepped ledge portions 18 and 19.
  • Those portions 16 of the corner radius ( Figure 3) blending the lower strip 17 with the flat central area 12 directly below the wider portions 18 of the stepped ledge are correspondingly more inwardly directed towards the centre of the lug-cover than portions 15 of the corner radius ( Figure 4) directly below the narrower portions 19 of the stepped ledge.
  • a gasket groove 21 which may be spuri-circular in cross-section extends from the top of the upper strip 20 upwardly and outwardly then downwardly and outwardly through an angle of approximately 180 degrees. From the radially outer termination of the gasket groove 21 a peripheral strip 22 of cylindrical form extends downwardly.
  • lugs 24 around the periphery are formed and depend downwardly.
  • An elongated hole 26 in each lug 24 is provided to enable removal of the lug-cover 10 by partially restraightening the lugs after the latter have been bent into a crimped interengagement (not shown) with the rim 28 of a pail 30 ( Figure 5) .
  • the lug-cover 10 is divided into an even number of segments, eight as illustrated, by virtue of regions of different radial dimension Rl and R2.
  • the radii Rl and R2 are applicable to the as defined lower strip 17, as best seen by referring to Figures 3 and 4.
  • the larger radius, Rl relates to the circumferential extents of the narrower ledge portions 19 whilst the smaller radius R2, relates to the circumferential extents of the wider ledge portions 18.
  • the wider ledge portions 18 provide support for the corner radii 15 and 16 of above adjacent lug-cover in a stack to seat upon, thereby advantageously creating great resistance to being telescopically jammed one inside the other, as will be described with reference to Figures 6(a) and 6(b).
  • segmental dividing lines 30 to 37 in Figure 2 define unequal angles A, B, C, D, E, F, G and H, adding in total to 360 degrees, each angle subtending at the drawn wall the alternating wider portions 18 and narrower portions 19 of the stepped ledge formed in the drawn wall.
  • the narrower ledge portions 18 of the stepped ledge in the drawn wall of the lower lug-cover make contact with the outside surface of the corner radius 15 of the lug-cover above it.
  • the narrower ledge portions 18 of the stepped ledge in the drawn wall of the lower lug-cover make contact with the outside surface of the corner radius 15 of the lug-cover above it.
  • the drawn wall four spaced apart wider portions 18 of the stepped ledge separated from each other by part circumferentially extending narrower ledge portions 19. There could be as few as three wider portions
  • Each narrower ledge portion 19 has a different circumferential length compared with other narrower ledge portions formed in the drawn wall of the same lug-cover. That is, the angles B, D, F and H in Figure 2 are not equal.
  • the lugs 24 around the periphery are provided with a downwardly and outwardly flared portion 54 defined by an upper end 52 and a lower end 53.
  • the upper end 52 coincides with the lower extremity of the peripheral strip 22 and the lower end 53 defines the upper extremity of a less flared or non-flared second portion 55 of the lugs which second portion has its lower extremity generally coincident to the lower extremity of the lugs 56.
  • the lowermost tip 56 of any lug 24 of any lug- cover in a stack (other than the bottom one) containing lug- covers oriented with the lugs downwardly as illustrated in Figures 6(a) and 6(b) engages with at least a point on the downwardly and outwardly flared portion 54 of a corresponding lug or lugs of a lug-cover below it in a stack.
  • the lower end portion 55 of the lugs are relatively more easily deflected elastically radially outwardly than the upper end 52 of the lugs and thus the contact between the tips of the lugs assists in avoiding inseparable binding or jamming occurring between the lug-covers after stacking and transporting.
  • Figure 6(a) shows lug-cover contact occurring at two locations, the wider ledge 18 to corner radius 15 location and the lug tip 56 to lug flared portion 54 location.
  • lug-cover to pail seal involves an inward and upward deformation of the lugs using a sealing or crimping tool as described and illustrated in published
  • a flat component 76 is blanked from sheet steel or tinplate, the lugs 24 and holes 26 in each lug being formed.
  • the flat component 76 as first blanked is drawn over a die to form the drawn wall and flanged periphery 78 as shown in Figure 8.
  • the mating male 80 and female 82 parts of the die having the required form to produce the angularly flared portion of the lugs are provided so that the flared lugs are formed as the die reaches the closed position, simultaneously forming the gasket groove (21 of Figure 3) and stepped ledge portions 18 and 19 also.
  • FIG 10 the known type of lug-cover 100 is shown for comparison. Many of the elements of the lug-cover in Figure 10 are generally similar to those shown in Figures 1 and 2.
  • the anti-jamming provision consists in Figure 10 of four asymmetrically disposed radially inwardly directed formations, known as stacking nibs 101, in the draw region 102 of the lug-cover. These stacking nibs have been used in the industry for many years and are known to be effective in preventing jamming. However, they have proved to be a serious impediment in attempts to make a superior pail to lug-cover closure adequate for compliance with dangerous goods regulations.
  • the radial inward displacement of the known stacking nibs also contrasts with the present invention in which the radial inward displacement is relatively much smaller, being preferably in the range of two to three times the metal thickness of the lug-cover whereas the known stacking nibs are inwardly displaced at least six times the metal thickness of the cover.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

Un couvercle à onglets (10) destiné à fermer et obturer un conteneur tel qu'un seau notamment pour le transport de produits dangereux, comporte une paroi emboutie autour de laquelle s'étend de manière circonférentielle un rebord à épaulement divisé de manière circonférentielle en parties étroites (19) et en parties plus larges (18) alternant un segments autour de la circonférence du rebord à épaulement, et s'étendant axialement vers le bas en non-circularité correspondante jusqu'à aux rayons (15, 16) des coins correspondant respectivement aux parties étroites et larges du rebord à épaulement. L'étendue circonférentielle de chaque partie étroite et large est différente de celle des autres parties étroites et larges. Pendant la fabrication, on fait tourner les couvercles à onglets avant de les empiler. En conséquence il y a une très grande probabilité que les couvercles à onglets adjacents dans une pile aient été tournés d'un angle différent et donc que les parties étroites (19) de rebord d'un couvercle à onglets se trouvent sur les parties larges (18) de rebord du couvercle à onglets sur lequel il est posé. Lesdits couvercles à onglets ferment les seaux de manière plus étanche, ils sont faciles à séparer après avoir été empilés et transportés jusqu'à un point d'utilisation; ils sont également faciles à enlever du seau.
PCT/AU1989/000227 1988-05-25 1989-05-23 Couvercle a onglets WO1989011423A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPI842988 1988-05-25
AUPI8429 1988-05-25

Publications (1)

Publication Number Publication Date
WO1989011423A1 true WO1989011423A1 (fr) 1989-11-30

Family

ID=3773105

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1989/000227 WO1989011423A1 (fr) 1988-05-25 1989-05-23 Couvercle a onglets

Country Status (1)

Country Link
WO (1) WO1989011423A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0447693A1 (fr) * 1990-03-22 1991-09-25 LIMEA-FISMA S.p.A. Couvercle en tôle emboutie
US10086981B2 (en) 2016-09-28 2018-10-02 Hfa, Inc. Method of manufacturing an improved disposable lid
US10093452B2 (en) 2016-09-28 2018-10-09 Hfa, Inc. Method of manufacturing an improved disposable lid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU200161A (en) * 1963-03-14 1963-03-07 Illinois Toolworks Self-venting package
GB1315451A (en) * 1971-05-05 1973-05-02 Metal Box Co Ltd Lids for circular containers
AU7409587A (en) * 1986-06-11 1987-12-17 Rheem Australia Pty Limited Stackable lugged pail lid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU200161A (en) * 1963-03-14 1963-03-07 Illinois Toolworks Self-venting package
GB1315451A (en) * 1971-05-05 1973-05-02 Metal Box Co Ltd Lids for circular containers
AU7409587A (en) * 1986-06-11 1987-12-17 Rheem Australia Pty Limited Stackable lugged pail lid

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0447693A1 (fr) * 1990-03-22 1991-09-25 LIMEA-FISMA S.p.A. Couvercle en tôle emboutie
US10086981B2 (en) 2016-09-28 2018-10-02 Hfa, Inc. Method of manufacturing an improved disposable lid
US10093452B2 (en) 2016-09-28 2018-10-09 Hfa, Inc. Method of manufacturing an improved disposable lid
US10442579B2 (en) 2016-09-28 2019-10-15 Hfa, Inc. Method of manufacturing an improved disposable lid
US10486858B2 (en) 2016-09-28 2019-11-26 Hfa, Inc. Method of manufacturing an improved disposable lid

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