WO1988005406A1 - Couvercle de recipient s'ouvrant par enlevement d'un disque et caracteristiques pour assurer la securite de l'utilisateur - Google Patents

Couvercle de recipient s'ouvrant par enlevement d'un disque et caracteristiques pour assurer la securite de l'utilisateur Download PDF

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Publication number
WO1988005406A1
WO1988005406A1 PCT/US1987/002649 US8702649W WO8805406A1 WO 1988005406 A1 WO1988005406 A1 WO 1988005406A1 US 8702649 W US8702649 W US 8702649W WO 8805406 A1 WO8805406 A1 WO 8805406A1
Authority
WO
WIPO (PCT)
Prior art keywords
scoreline
metal
sheet metal
end wall
opener
Prior art date
Application number
PCT/US1987/002649
Other languages
English (en)
Inventor
William T. Saunders
James A. Bray
William H. Dalrymple
Robert Meerdo
Original Assignee
Saunders William T
Bray James A
Dalrymple William H
Robert Meerdo
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
Priority claimed from PCT/US1987/000102 external-priority patent/WO1988005405A1/fr
Application filed by Saunders William T, Bray James A, Dalrymple William H, Robert Meerdo filed Critical Saunders William T
Priority to PCT/US1987/002649 priority Critical patent/WO1988005406A1/fr
Priority to AU11090/88A priority patent/AU1109088A/en
Priority to PCT/US1987/003418 priority patent/WO1988005407A1/fr
Priority to EP19880900752 priority patent/EP0299013A4/en
Priority to NZ223134A priority patent/NZ223134A/xx
Priority to AR88309901A priority patent/AR243458A1/es
Priority to PT86607A priority patent/PT86607A/pt
Priority to CN198888100286A priority patent/CN88100286A/zh
Priority to ES8800156A priority patent/ES2009161A6/es
Priority to US07/147,267 priority patent/US4804106A/en
Priority to PCT/US1988/002475 priority patent/WO1989002853A1/fr
Priority to AU21388/88A priority patent/AU2138888A/en
Priority to EP88908041A priority patent/EP0333805A1/fr
Priority to AU23215/88A priority patent/AU2321588A/en
Priority to PCT/US1988/002512 priority patent/WO1989002854A1/fr
Priority to JP88507099A priority patent/JPH02502814A/ja
Priority to MX015415A priority patent/MX173559B/es
Publication of WO1988005406A1 publication Critical patent/WO1988005406A1/fr
Priority to DK523488A priority patent/DK523488A/da
Priority to NO884196A priority patent/NO884196L/no
Priority to FI884354A priority patent/FI884354A/fi
Priority to KR1019880701156A priority patent/KR890700523A/ko
Priority to CA000578752A priority patent/CA1317241C/fr
Priority to CA000578885A priority patent/CA1312562C/fr
Priority to PT89330A priority patent/PT89330A/pt
Priority to CN88109281A priority patent/CN1035262A/zh
Priority to ES8803901A priority patent/ES2012581A6/es
Priority to DK215489A priority patent/DK215489A/da
Priority to NO89891977A priority patent/NO891977L/no
Priority to KR1019890700909A priority patent/KR890701434A/ko
Priority to FI892499A priority patent/FI892499A/fi
Priority to ZA894521A priority patent/ZA894521B/xx
Priority to PT91227A priority patent/PT91227B/pt
Priority to CN89104938A priority patent/CN1039769A/zh
Priority to ES898902590A priority patent/ES2015426A6/es

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/0074—Local recess in container end panel
    • B65D2517/0079—Local recess in container end panel located beneath tab hand grip to facilitate initial lifting

Definitions

  • This application is a continuation-in-part International Application No. PCT/US87/00102 , filed January 1987 and claims the priority of such earlier fil application for all common subject matter.
  • This invention relates to full-open, disc-removal convenience-feature, sheet metal end-closure structure to methods for fabricating and opening such structures and to safety provisions for obstructing access to ra edge metal remaining along a severed scoreline afte opening such a closure structure.
  • lever-assiste rupture was limited to only a minor portion of th peripheral scoreline during the initial rupturing proce dure. Thereafter, pulling backwardly on the tab opene ring had to be relied on to continue severance of residua metal along the remaining major portion (about 90%) of th peripheral scoreline after such initial lever actio rupture.
  • the present invention provides for lever-action eas of opening during severance of the peripheral scorelin which defines a full-open disc for removal from the en closure.
  • an elongated, longitudinally-rigid tab-opene structure increases available lever action.
  • a soli configuration handle end i.e. free of any finger opening can be used and, is preferred in order to help discourag an attempt to pull backwardly on the handle end of th opener from a location which lies internally of a lon gitudinal projection of the container side wall.
  • the present invention provides a new disc removal procedure and means for establishing use of suc new procedure with the elongated, longitudinally-rigi opener facilitates enabling lever-assistance for periph eral scoreline severance as the handle end of the opene is disposed at a location radially external of th periphery of the end closure.
  • FIG. 1 is a plan view of the outer or "public" surface (in relation to a container) of an end closure structure of the invention shown with integral opener in place for opening;
  • FIG. 2 is a bottom plan view of the inner or "prod ⁇ uct" surface (in relation to a container) showing the positional interrelationship of back scoreline means with rivet means for securing such opener to the panel to be severed from such closure structure;
  • FIG. 3 is an enlarged, outer-surface, plan partial view, without the opener in place for better viewing purposes, for describing the back scoreline means, its placement and its contributions to the invention;
  • FIG. 4 is a schematic cross-sectional partial view of an end closure structure of the invention on a container with the integral opener in position prior to initiating scoreline rupture;
  • FIG. 5 is a schematic cross-sectional partial view of the end closure structure of FIG. 4 subsequent to initia ⁇ tion of rupture of the back scoreline and a portion of the peripheral scoreline for defining the starter segment of the removable panel;
  • FIG. 6 is a schematic partial view, sequential to that of FIG. 5, showing completion of an initial rupture phase in which such starter, segment is moved from its original position in the end wall panel of the end closur structure;
  • FIG. 7 is an outer-surface plan view after continua tion of the arcuate movement of the tab opener to brin such opener into contact with chime seam in a position t continue severance of the peripheral scoreline, beyon that portion partially defining the starter segment, usin the chime seam as the fulcrum enabling subsequent leve action in accordance with the invention
  • FIG. 8 is an inner-surface plan view of the end wal structure at the opening stage of FIG. 7 with interconnec tion between the tab opener starter segment and remainde of the end wall panel in accordance with . the inventio providing continued severance of the remainder of th peripheral scoreline by lever action using the chime sea as a fulcrum;
  • FIG. 9 is a partial schematic view in cross-sectio of structure in accordance with the invention for describ ing the Class I lever action which continues severance o the peripheral scoreline using the chime seam as fulcrum;
  • FIG. 10 is a schematic cross-sectional view, subse quent to FIG. 9, for showing the "crow-bar" function o the longitudinally-rigid opener using Class I lever actio about the chime seam as the fulcrum in which the severabl panel moves in an axial direction externally away from th container in accordance with the invention;
  • FIG. 11 is a bottom plan view for showing a preferred back scoreline configuration which further increases the mechanical advantage available with teachings of the present invention and provides other advantages;
  • FIG. 12 is an outer-surface plan view of the end closure structure of FIG. 11 showing the starter segment resulting from rupture of the back scoreline and a minor portion of the peripheral scoreline in an intermediate opening stage;
  • FIG. 13 is a top plan view of a preferred specific embodiment of the end closure structure of the invention showing positioning of the opening instructions, as taught herein, to facilitate use of the new disc-removal proceed- ure of the invention;
  • FIG. 14 is a cross-sectional view of the end closure structure of FIG. 13, taken along the line 14-14 of FIG. 13;
  • FIG. 15 is a perspective view, at the initiation of the opening procedure, of the end closure structure of
  • FIG. 13 mounted on a cart body, showing the proper orientation for disc-removal brought by placement of the opening procedure instructions as taught herein;
  • FIG. 16 is a perspective view, sequential to that of FIG. 15, showing more clearly rupture of the scoreline defined portions of the starter segment as the handle end of the tab opener is moved through an arc of around 90° ;
  • FIG. 17 is an enlarged perspective partial view sequential to that of FIG. 16, showing the location of th lever fulcrum contiguous to the longitudinal location o the rivet along the length of the opener as the rupture o the peripheral scoreline, beyond the initial phase, take place by force applied to the opener from- a location radially exterior of the periphery of the end closure;
  • FIG. 18 is a perspective view, sequential to that o FIG. 17 showing continued "crow-bar” action disc remova as the arcuate movement of the handle end of the integra opener continues beyond 180 externally of the peripher of the can causing the severable end wall panel to b moved in substantially its original planar form from th container; and
  • FIG. 19 is a perspective view sequential to that o FIG. 18, showing the final stage of disc removal b lifting on the opener, retained by the disc, from th container;
  • FIGS. 20 through 25 are partial cross-sectiona views, taken radially of the end closure structure, fo describing the sequential steps in accordance with th invention for coordinated formation of shielding for raw edge scoreline metal by folding multi-layers of shee metal, for scoring the sheet metal, for forming a unitar rivet button, for end wall panel profiling and embossing and for riveting a tab opener to be integral with the removable disc, in which:
  • FIG. 20 shows the results of shaping a cut blank to provide chime seam metal, a chuck wall and sheet metal portions extending in stepped fashion, radially-inwardly in relation to the end closure structure and in an axial direction in relation to a can body for receiving such end closure structure, toward an end wall panel which is recessed axially in relation to such chime seam metal toward the interior of such a container used with such end closure,
  • FIG. 21 shows start of rivet button formation and an initial stage for subsequent folding of such sheet metal portions in a. sequence subsequent to that of FIG. 20, FIG. 22, which is sequential to FIG. 21, shows forma ⁇ tion of a smaller diameter rivet button, an intermediate stage in the folding of such sheet me n tal portions, and start of recessing of a centrally located panel portion,
  • FIG. 23, which is sequential to FIG. 22, shows peripheral and back scoreline formation, with such scorelines being formed immediately prior to final orientation of either of a pair of multi-layer folds of sheet metal contiguous to the peripheral scoreline on opposite surfaces of such end closure
  • FIG. 24, which is sequential to FIG. 23, represents the sequence for final rivet button shaping and final orientation of a multi-layer fold of sheet metal fo shielding residual scoreline metal of the removable dis to be separated from the end closure structure and fo embossing the end wall panel with instructions as shown i FIG. 13, and
  • FIG. 25 shows the rivet button formed into a rive securing a tab opener to the disc and final orientation o the multi-layer fold of sheet metal for shielding th residual scoreline metal of that portion of the en closure structure remaining with the container.
  • the present invention provides procedure and struc ture which make lever-action and mechanical advantag severance available substantially throughout, or through out the major portion which is significant for ease o opening, of a peripheral scoreline defining a disc to b removed for full-opening of a container.
  • Endwall closure structure 27 shown in plan view o its outer surface in FIG. 1, is formed with chime sea metal 28 around its outer periphery; a longitudinally rigid tab opener 30 is secured to removable disc 31 b rivet 32.
  • the working end 33 of elongated tab opener 3 is positioned in contiguous relationship to a portion o peripheral scoreline 34; the latter has a circula configuration in such plan view and defines removable dis 31.
  • Back scoreline leg portions 35, 36 extend in transverse relationship to the diametric alignment of the longitudinal axis of opener 30. Such legs 35, 36 define, at least in part, a chord across minor portion of the circular peripheral scoreline 34 which helps to define a part of a starter segment which is first moved from its original disposition in the plane o the end wall panel.
  • the elongated tab opener 30 is non-lanced (no par moves relative to another part) and is fabricated to hav appropriate longitudinal strength characteristics for th functions disclosed herein. For example, sheet metal of suitable gage is selected, and the tab opener is rein forced longitudinally, to enable it to act as a longitud inally rigid, high-strength lever throughout severance o a full panel disc.
  • a solid configuration for the tab opener 30 free of any ring pull opening at or near its handle en 37, is taught herein to discourage pulling backwardly o the handle after the initial rupturing procedure for th starter segment.
  • the handle end of the tab opener is located over centrally-located, profiling indentation 38 which is o circular configuration in plan view.
  • profiling indentation 38 is o circular configuration in plan view.
  • Such indente portion of the panel maintains disc 31 substantiall planar and helps to provide finger access for initiatin arcuate movement of the handle end of the tab opener in direction externally away from the container to initiat opening.
  • the back scoreline configuration of the embodiment o FIG. 1 is shown more completely in the bottom plan view o FIG. 2, in which the end closure structure is seen as i appears on the "inner" surface of the structure which wil confront product held by a container, after assembly.
  • Th back scoreline legs 35, 36 stem from rivet-circumscribin center section 39 of the back scoreline means, in th direction of the adjacent periphery of the end wal closure 27.
  • Center scoreline section 39 is disposed about th periphery of a portion of rivet 32 (FIG. 3). In th embodiment shown, it is formed from multiple radii so tha a portion 40 protrudes relative to circumferentia portions 41, 42 in a radially inward direction. A smalle radius (in relation to that of 41, 42) provides a semi pointed configuration which ruptures readily to vent th container upon initial lifting of the handle end 37; suc initial rupturing occurs while- tab opener 30 is still in position substantially overlaying scoreline section 39 Arc portions 41, 42 of scoreline section 39 lead to leg 35, 36. Back scoreline legs, such as 35, 36, are directe toward an adjacent portion of the peripheral scoreline 34 Such legs are scored to provide at least.
  • Scored legs 35, 36 help to define starter segment 45 (FIG. 3) which is a minor area of the circular panel 31. A portion of segment 45, between its chord and the chord's subtended arc . is bent inwardly of the container by the opening procedures prior to full panel severance.
  • the scored legs 35, 36 terminate before intersection with the peripheral scoreline; they are part of such chord which, in the embodiment shown, is positioned radially inwardly of center 44 of rivet 32.
  • a resulting bend-line chord in this embodiment acts as an interim fulcrum for Class I lever action of opener 30 during rupture of a portion of the subtended arc of the peripheral scoreline.
  • the area of the segment 45, which is bent toward the interior of a container, is increased by location of legs 35, 36 to form a chord radially inwardly of rivet center 44, over that which would be provided if the chord were oriented to pass through the center of, or radially outwardly beyond the center of rivet 32.
  • Other important configurational aspects of the back scoreline legs are considered in greater detail later herein.
  • Arrow 46 indicating the arcuate direction of movemen of the handle end of opener 30; this direction of arcuat movement of the handle end of an opener is utilized in th invention for lever action severance of periphera scoreline throughout the opening procedure.
  • the handle end is started on its arcuate movement b lifting (with a finger, other than the thumb, as show later herein) in a direction toward the user as suc handle end moves initially away from the outer surface o the end wall panel 31.
  • the periphera chime metal 28 of FIGS. 1 and 2 is formed into chime sea 47 and that the upper surface of metal 28 constitutes th exposed (upper) surface of chime seam 47 as shown in th cross sectional views of FIGS. 4-6.
  • en wall panel 31 is countersunk in relation to the axia disposition of such upper surface of chime seam 47; an that the centrally located profiling portion 38 i recessed axially from the remainder of end wall panel 31.
  • Rupture of the rivet-circumscribing, portion 39 o the back scoreline and start of rupture of a minor ar portion (partially defining starter segment 45) of th peripheral scoreline 34 are shown in FIG. 5.
  • the arcuate movement of th handle end of opener 30 is continued in the same direc tion; the angular direction of the legs of the bac scoreline means toward the adjacent peripheral scoreline helps to determine size of the starter segment.
  • the scored legs 35, 36 contribute to defining starter segment 45.
  • the movement of the handle end of tab opener 30 is continued in the arcuate direction into an upright position as shown in FIG. 6 (and beyond as shown in FIGS. 7, 8 and 9).
  • the chord determined by the direction of the scored lines of legs 35, 36, acts as the pivot (fulcrum) axis rather than the center 44 of rivet 32 in disposing a portion of starter segment 45 (FIG. 6) inwardly of the container.
  • the contact between the elongated opener 30 and the chime seam 47 acts as a fulcrum for continue lever-action severance of the peripheral scoreline 3 (such continued lever-action taking place with the hand o the user being located radially exterior of the peripher of the chime seam and container side wall); the continuin arcuate movement (arrow 46, FIG. 10) of the handle end o opener 30 causes Class I lever action output, at th working end 33 of opener 30 in the direction of arrow 5 of FIG. 10.
  • the lever acts as a "crow-bar" about th chime to move the panel 31 in an outward direction i relation to the container, completing lever-action sever ance of the remainder of the peripheral scoreline 3 around planar configuration disc.
  • the full disc 31 is move upwardly from its countersunk position by such leve action, severing most, if not all, of the remainder of th scoreline 34 (FIG. 3) around disc 31 with the uppe surface of chime seam 47 acting as the fulcrum for suc continued lever action.
  • the tab opener remains secured t the removable disc through segment 45 which remains joine to the remainder of the disc 31 by the residual metal, i any, along legs 35, 36 but, more importantly, by metal beyond the ends of such legs, which comprise safet "shielding" for raw edge severed metal as described late herein.
  • the lever action which moves the working end 33 of opener 30 in the direction of arrow 50 severs peripheral scoreline toward that portion of the peripheral scoreline 34 which is diametrically opposite to the initially ruptured portion.
  • the force required for removal is diminishing so that the "crow-bar" action requirements are diminishing and, the end wall panel can be lifted from the closure struc ⁇ ture with any minor remaining peripheral scoreline being severed by such lifting.
  • FIG. 11 A more complete view of the back scoreline con ⁇ figuration is available in the (product surface) plan view of FIG. 11; and the tab opener 51 is seen on the outer surface view of FIG. 12.
  • Such back scoreline means include a rivet-circumscribing central portion 52 and angled legs 53, 54; which, in this embodiment have a curvilinear configuration initially extending transversely to a diameter of the panel and then in a generally radial direction toward adjacent peripheral scoreline 34.
  • the effective included angle between legs 53 , 54 is a minor acute angle; helping to define a minor area (which is significantly less than that of the embodiment of FIG. 3) of the disc to be removed.
  • chord 57 Scoring for the legs termin- ates at points 55, 56 contiguous to shielding means (on the end wall panel) to be described in more detail later herein.
  • Chord 57 shown in broken lines, ends contiguous ⁇ ly to termination points 55, 56 at such shielding means.
  • the portion of the periphery scoreline which is ruptured during the initial rupturing procedure is the arc sub ⁇ tended by chord 57.
  • Starter segment 58 (FIG. 12), is significantly smaller than segment 45 of the earlier-described FIG. 3 embodiment.
  • the effective length of the opener acting as work-input lever arm is increased during a portion of the initial rupturing procedure and, also, subsequently due to the increased length of the opener which is disposed radially outwardly of the chime seam for the container, which chime seam acts as the fulcrum for the latter lever action.
  • the back scoreline means of FIG. 11 is scored for severing about central portion 52 and along the angled legs 53, 54.
  • the angled legs turn toward the adjacent peripheral scoreline with a major component in the same direction as the longitudinal axis of the elongated opener 51. That this configuration can be used without concern for completely ripping a minor wedge (the starter segment) from the removable disc is due to the multi-layer shee metal fold teachings, for shielding raw-edge residual scoreline metal, shown and described in relation to late figures.
  • Such sheet metal shielding folds prevent starte segment 58 (FIG.
  • the non-lanced (longitudinally rigid) tab opener 5 partially shown in bottom plan view in FIG. 12 include fold-over rounded-edge metal, such as 59, around its oute periphery (except near its working end) and around th ring-opening.
  • fold-over rounded-edge metal such as 59
  • Such longitudinally-extending rounded edg metal increases the longitudinal strength of tab opener 5 for lever action purposes.
  • Profiling of the tab opene such as 60 surrounding rivet 37 (FIG. 13) can also add t that longitudinal strength.
  • Increasing the length an longitudinal strength of the tab opener facilitates th opening procedures taught herein.
  • a chisel point, such a 33 (FIG. 8) provided at the working end of an opener facilitates the initial puncture which starts rupture o the peripheral scoreline.
  • FIG. 13 shows aspects no shown in FIGS. 11, 12, such as protrusions 61 and 62 whic are convex in relation to the outer surface in FIG. 13
  • Protrusions 61, 62 are used in alignment and stacking and, are located along a line which is intermediate th center of the end wall panel and the center of the rivet on opposite sides of a radial line between such centers in order to serve most effectively for alignment an stacking.
  • linearly-extended, outwardly-projectin profiling bar 65 is positioned at a location below th handle end of the tab opener 51 so as to position such opener horizontally when forming rivet 32; and, also, to help maintain desired access at the working end for opening. The direction of such profiling and alignment protrusion can be seen more clearly in the cross section view of FIG. 14.
  • FIGS. 15-19 which are used to describe the new disc-removal opening procedure of the invention, the placement and the orientation of such instructions diametrically opposite to the location for the tab opener orients the end closure properly so that the handle end of the opener, upon lifting, can be swung in an arc toward the user.
  • Such direction of arcuate movement is continued (as the arc exceeds 90° ) over the side of the container using the chime seam as a fulcrum to provide leveraged severance of the peripheral scoreline beyond the initial starter segment portion.
  • the index or middle finger is used for initiating disc removal in the new opening method rather than attempting to force the thumb under the handle end of the tab opener as in prior disc removal methods.
  • placement of the instructions 66 requires orienting of the end closure so that the index or middle finger is used in order to be able to read such instructions (unobstructed by the hand of the user). Th thumb, at such stage, is braced against the chime seam 4 and the container side wall.
  • the handle end of tab opener 51 is lifted by th index and/or middle finger (FIG. 15) in a directio externally away from the container initially.
  • the swin of the handle end as shown in FIG. 16) continues towar the user.
  • FIGS. 17 and 18 As shown in FIG. 17 the tab opener 51 contacts th chime seam 47, at a location along the length of th opener which is about the same as the location of th rivet 32 along the length of the opener.
  • the starte segment 58 remains unitary with the disc as the periphera scoreline is severed by such lever action.
  • FIGS. 20 through 25 are radial, cross-sectional partial views for purposes of describing sequential stage in the formation, of the end closure structure includedin shielding means for the raw edge metal remaining afte severing of the peripheral scoreline.
  • FIG. 20 shows results of an early forming operatio on a blank involving forming of the chime seam metal an countersinking end wall panel 31 in relation to chim metal 28.
  • steps and risers generally designated 70 are part of the sheet metal portions for forming a pair o multi-layer .folds of sheet metal; one such fold fo shielding residual raw edge metal remaining with " a dis after severance of the peripherally located scoreline and one for shielding residual raw edge metal on the end wal closure structure remaining with the container.
  • step and riser portions of these multi-laye folds of sheet metal are joined to each other and at eac end to the chuck wall and end wall panel, respectively, b transition 7 zones of compound curvature (i.e. curvilinea in a plane which is perpendicularly transverse to th central axis of the container and, also, rounded in radia cross section).
  • 21 step portion 71 leads to riser portion 72 through intermediate transitio zone 73; step portion 74 is connected to riser portion 72 through curvilinear zone 75; step portion 74 leads to riser portion 76 through transition zone 77; and riser portion 76 leads to transition zone 78 formed with panel 31.
  • the peripheral scoreline for the removable disc is to be disposed intermediate and symmetrically in relation to the pair of multi-layer folds which separately shield residual scoreline metal on the separated disc and on the container end structure.
  • the procedure taught enables access by multi-layer pre-fold, on each surface of the end closure, for scoring a single thickness of sheet metal; the latter is supported oppositely on- the remaining surface.
  • the prefolding of the sheet metal layers provides for completing the folding action, around such circular periphery, with only slight movement of rounded transition zone metal being required to enable later shielding without premature damage to residual scoreline metal.
  • FIG. 21 which is sequential to FIG. 20
  • an initial rivet button configuration 80 having a broad-diameter shallow-dome shape in cross section is formed.
  • the sheet metal "step" portion 74 i oriented horizontally as shown; peripheral scoring (34 will subsequently take place on such horizontally oriente metal portion 74 to be located radially intermediate th pair of multi-layer folds.
  • Multi-layer folding of the sheet metal, scorelin formation, rivet button and profiling formation, an riveting a tab opener to the disc are coordinated whil optimizing the number of work strokes.
  • the rivet button formation and riveting actions ar carried out in sequence without interfering with the meta folding or scoring operations. Completing the fina configurations for the projections 61 and 62, the suppor bar 65 and embossing 66 can be carried out simultaneousl with formation of the rivet button and the profiling t form recessed panel 38.
  • metal portions 71 , 72 and compound curvature zone 73 wil form a multi-layer fold for shielding the raw edge meta remaining with the end closure structure on the container
  • Metal portion 74 will be the connector between the pair o multi-layer sheet metal folds; also, the periphera scoreline 34 which will define the removable panel 31, will be carried out on metal portion 74.
  • Metal portio 76 is joined to the horizontal intermediate portion 74 by compound curvature zone 77; compound curvature transition zone 78 and a portion 82 (of the recessed panel adjacent to zone 78) complete the multi-layer fold for providing the shielding for the residual raw edge metal remaining with the severed disc 31.
  • FIG. 22 a smaller-diameter, greater-depth rivet button 83 is formed and the pre-folding of the metal portions 76, 82 about zone 78 is increased, as shown.
  • multi-layer folds of metal for shielding both the scoreline residual metal on the disc and that remaining with the end structure on the container are provided.
  • Another method (not necessarily part of the prior art) for protecting the residual scoreline metal remaining with the container by profiling of a container side wall has certain disadvantages in diminishing container volume.
  • the embodiment of FIGS. 20- 25 does not diminish container contents and provides an increased area opening for dispensing container contents.
  • FIG. 23 the folded relationship between sheet metal portions 71, 72 (about compound curvature zone 73 for the .
  • a back scoreline means such as back scoreline 39 (or the back scoreline 52 of FIG. 11) is formed by tool 87, with the support for all scoring being provided by tooling 88.
  • FIG. 24 shows completing the multi-layer folds for the disc and final shaping for rivet button 91; and, FIG. 25 shows riveting the tab opener to the disc using support tooling while completing a very minor movement of the plurality of layers in the fold remaining with the end closure struc ⁇ ture (into alignment with the centerline of the peripheral scoreline) .
  • Back scoreline tool 87 (FIG. 23) is selected to establish desired starter segment configuration (central portion and angled legs) for the desired embodiment; back scoreline scoring is carried out during the same work stroke as the peripheral scoring.
  • the plurality of sheet metal layers for shielding the disc are oriented with the rounded-edge zone 78 being oriented in a radially outward direction with a diameter substantially equal to the diameter of the centerline of the peripheral scoreline so as to be in shielding relationship to raw edge metal on the disc after severance by obstructing (i.e. restricting direct) access to such raw edge material.
  • a final minor shaping to form rivet bu-tton 91 prior to forming the rivet, takes place and folding of the sheet metal layers for the disc is completed from the prefolded stage shown in FIG. 23.
  • Rounded metal transition-zone 78 around its periphery is then contiguous in plan view to a projection (onto a plane which is transversely perpendicular to the longitudinal central axis of the container) of the centerline of pheripheral scoreline 34.
  • Such shielding means for the raw edge metal of the disc is located on the product side of the end wall panel.
  • tab opener (30, 51) is placed over rivet button 91.
  • Bar 65 helps to support the tab opener horizontally for the rivet forming step carried out between tooling 92, 94.
  • the sheet metal layers comprising the fold remaining on the container can be moved slightly, as shown,- so that compound curvature transition zone 73 having a periphery substantially equal in diameter to that of the centerline of scoreline 34 is disposed, in plan view contiguous to a projection of such center line of scoreline 34, so as to shield the raw-edge of metal which will remain on that portion of the end closure structure remaining with the container when the peripheral scoreline is severed.
  • Metal portions 71, 72 can be folded slightly during this stage to provide such desired shielding by zone 73 while leaving sufficient clearance for removal of end wall panel 31; i.e., zone 73 does not extend radially inwardly beyond the centerline of the peripheral scoreline 34.
  • Such multi-layer fold shielding means remaining with the panel is disposed on the inner surface of the end wall panel.
  • the rounded-edge transition zone (73, 78) of each multi-layer fold at least partially obstructs direct access to its respective raw edge residual metal during and after severance since each such rounded-edge transition zone of its respective multi- " layer fold is of substantially the same diameter as the contiguous raw edge metal remaining after severance of the residual metal along the centerline of such peripheral scoreline.
  • FIG. 21 (FIG. 21) dia. 3.18" chuck wall 69 dia. 3.25"
  • FIG. 21 chuck wall height .18" Axial dimension between center of chime seam metal and panel 31
  • FIG. 25 Rivet head (diameter) .25"
  • the location of the rivet depends on the dimensional values and location of the tab opener; typically the sharp-edge chisel point of the working end of the tab opener is located contiguous to but sufficiently radially inward of the peripheral scoreline so that the rounded edge 73 of the shielding means remaining with the con ⁇ tainer does not impede the arcuate movement, initial rupturing action of the working end of the opener.
  • the spacing from the working end of the tab opener to the aperture for the rivet button determines the location for the rivet button in the end wall panel; typically the center of the rivet would be 1.25", measuring radially, from the center of the end panel in the embodiment of FIG. 11.
  • Typical thicknesses for flat rolled aluminum end closures would be .009" to .012" with residual metal thickness for scored severing lines of about .004" to .005".
  • Tab openers of the present invention are longitud- inally rigid. They are not lanced or cut out in the vicinity of the rivet as in the prior practice in which
  • the tab opener is preferably free of a finger opening (as in FIG. 1) but can be provided with a ring shaped opener (as in FIG. 12) . Approximate dimensional values for the tab openers identified are set forth below:
  • Tab Opener 30 (FIG. 1) sheet metal flat rolled steel nominal thickness .012" to .019" type of coating tinplate, TFS or galvanized overall length 1.54" maximum width 1.1" rivet opening - distance from working end .30"
  • the thickness gage for the tab opener can vary with the length and reinforcing provided by edge rolling and metal profiling.
  • the object when working with the starter segment 45 embodiment (FIG. 1) is to provide for fro twelve (12) to fifteen (15) pounds of force to be applie to the handle end of the tab opener without permanen damage to the tab opener due to longitudinal bending o collapsing. With the smaller starter segment provided b the back score line means of FIG. 11, and resultan increased mechanical advantage, force requirements ar decreased by about 60%.
  • tab openers fabricated from aluminum woul rely on flat rolled aluminum having a nominal thickness gage between .014" and .022".
  • the full-open convenience features of the invention rely on means for interrupting and limiting rupture of metal along the back scoreline legs in any embodiments but particularly with a back scoreline of the configuration shown in FIG 11 in which the legs 53, 54 take on a substantially radial direction, which would be likely under ordinary circumstances, to cause starter segment such as 58 to be ripped entirely from the end wall panel 31.
  • the multi-layer sheet metal fold which is radially interior of peripheral scoreline 34 serves an important function (in addition to its later shielding function) during the opening procedure. It acts to limit ripping of starter segment sheet metal along the back scoreline legs and, serves as a hinge-like unitary connection with the remainder of the end wall panel during the continued lever action of the tab opener about the chime seam as a fulcrum.
  • the back scoreline means configuration facilitates use of a non-lanced tab opener; initial sheet metal rupture is facilitated by the radially inwardly pointed configuration of the central portion of the back score ⁇ line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Closures For Containers (AREA)

Abstract

Partie d'un récipient formant couvercle susceptible d'être enlevée totalement (27) et comprenant une partie centrale à encoche périphérique (40, 52) qui se rompt lorsque, par un effet de levier du deuxième genre, on soulève un ouvre-boîte (non pointu) à languette rigide sur toute sa longueur (30, 51), moment où une pointe de ciseau (33) située à l'extrémité utile de cet ouvre-boîte rompt l'encoche périphérique (34) sur une faible longueur. En imprimant un mouvement continu à l'extrémité de la poignée (37) de l'ouvre-boîte à languette dans la direction (46 vers l'utilisateur) contiguë au raccord du jable (47), on provoque une rupture sans interruption, par effet de levier du premier genre, sur l'encoche périphérique, le bord du jable servant de point d'appui. Des replis de la tôle formant plusieurs couches, en vue de ménager entre les couches une partie métallique (73, 78) à arêtes arrondies servant de zone de transition afin de couvrir l'arête vive du métal resté sur la boîte après rupture au niveau de l'encoche, sont disposés à l'avance sur la partie du disque enlevable et sur la partie du couvercle restant rattachée au récipient.
PCT/US1987/002649 1987-01-23 1987-09-29 Couvercle de recipient s'ouvrant par enlevement d'un disque et caracteristiques pour assurer la securite de l'utilisateur WO1988005406A1 (fr)

Priority Applications (34)

Application Number Priority Date Filing Date Title
PCT/US1987/002649 WO1988005406A1 (fr) 1987-01-23 1987-09-29 Couvercle de recipient s'ouvrant par enlevement d'un disque et caracteristiques pour assurer la securite de l'utilisateur
AU11090/88A AU1109088A (en) 1987-01-23 1987-12-23 Disc removal end wall structure with safety features
PCT/US1987/003418 WO1988005407A1 (fr) 1987-01-23 1987-12-23 Structure de paroi terminale avec disque a retirer et dispositif de securite
EP19880900752 EP0299013A4 (en) 1987-01-23 1987-12-23 Disc removal end wall structure with safety features
NZ223134A NZ223134A (en) 1987-01-23 1988-01-08 Can closure, permits removal of disc portion
US07/147,267 US4804106A (en) 1987-09-29 1988-01-22 Measures to control opening of full-panel safety-edge, convenience-feature end closures
ES8800156A ES2009161A6 (es) 1987-01-23 1988-01-22 Estructura de cierre extremo de chapa metalica para un recipiente y un metodo para su fabricacion.
PT86607A PT86607A (pt) 1987-01-23 1988-01-22 Estrutura de tampa de topo de um recipiente
CN198888100286A CN88100286A (zh) 1987-01-23 1988-01-22 容器端盖结构
AR88309901A AR243458A1 (es) 1987-01-23 1988-01-22 Una estructura de cierre de extremo para recipientes de chapa metalica, de facil apertura y remocion de disco y un metodo para fabricar dicha estructura.
PCT/US1988/002475 WO1989002853A1 (fr) 1987-09-29 1988-07-20 Moyens servant a commander l'ouverture de couvercles d'extremite a plaque pleine, avec un bord de protection et de maniement aise
AU21388/88A AU2138888A (en) 1987-09-29 1988-07-20 Measures to control opening of full-panel safety-edge, convenience-feature end closures
EP88908041A EP0333805A1 (fr) 1987-01-23 1988-07-22 Couvercles d'extremite avec bords de protection et commande de l'ouverture, de maniement aise et resistant a l'endommagement
AU23215/88A AU2321588A (en) 1987-01-23 1988-07-22 Abuse resistant, safety-edge, controlled-opening convenience-feature endclosures
PCT/US1988/002512 WO1989002854A1 (fr) 1987-01-23 1988-07-22 Couvercles d'extremite avec bords de protection et commande de l'ouverture, de maniement aise et resistant a l'endommagement
JP88507099A JPH02502814A (ja) 1987-01-23 1988-07-22 酷使に耐え、安全な縁を有し、制御された開口の、便利な特徴を有する閉鎖体
MX015415A MX173559B (es) 1987-01-23 1988-07-22 Tapas para extremo con caracteristica de comodidad de abertura controlada, con borde de seguridad resistentes al abuso
DK523488A DK523488A (da) 1987-01-23 1988-09-20 Skiveformet del til fjernelse i en endevaegskonstruktion med sikkerhedsforanstaltninger
FI884354A FI884354A (fi) 1987-01-23 1988-09-22 Gavelvaeggskonstruktion med loestagbar skiva och saekerhetsegenskaper.
NO884196A NO884196L (no) 1987-01-23 1988-09-22 Flat, borttakbar endevegg for beholder, samt fremgangsmaate til fremstilling derav.
KR1019880701156A KR890700523A (ko) 1987-01-23 1988-09-23 디스크 제거형 단부벽 구조물
CA000578752A CA1317241C (fr) 1987-01-23 1988-09-28 Fermetures d'extremite pratiques a ouverture commandee, resistantes et a bord securitaire
CA000578885A CA1312562C (fr) 1987-09-29 1988-09-29 Moyens de controle d'ouverture d'obturateur integral d'extremite, a bord de securite
PT89330A PT89330A (pt) 1987-09-29 1988-12-22 Estrutura de parede de topo de um recipiente
CN88109281A CN1035262A (zh) 1987-09-29 1988-12-22 容器端壁结构
ES8803901A ES2012581A6 (es) 1987-09-29 1988-12-22 Estructura de cierre extremo para recipientes.
DK215489A DK215489A (da) 1987-01-23 1989-05-02 Endelukke med egenskaber, der sikrer mod misbrug og giver en styret og bekvem aabning, og som er forsynet med en sikkerhedskant
NO89891977A NO891977L (no) 1987-01-23 1989-05-18 Endelukkeanordning av platemetall for beholder.
KR1019890700909A KR890701434A (ko) 1987-09-29 1989-05-23 용기용 판금단부 봉합 구조체 및 그 제조방법
FI892499A FI892499A (fi) 1987-01-23 1989-05-23 Missbruk foerhindrande, med saekerhetskant foersedda burkfoerslutningar med en reglerbar, laettoeppnad konstruktion.
ZA894521A ZA894521B (en) 1987-01-23 1989-06-14 Container end closure
PT91227A PT91227B (pt) 1987-01-23 1989-07-20 Estrutura de fundo de um recipiente e processo para a sua fabricacao
CN89104938A CN1039769A (zh) 1987-01-23 1989-07-21 包装容器端头封闭物
ES898902590A ES2015426A6 (es) 1987-01-23 1989-07-21 Una estructura de cierre extremo para un envase y metodo para fabricarla.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
PCT/US1987/000102 WO1988005405A1 (fr) 1987-01-23 1987-01-23 Structure de paroi terminale avec disque a retirer et dispositif de securite
USPCT/US87/00102 1987-01-23
PCT/US1987/002649 WO1988005406A1 (fr) 1987-01-23 1987-09-29 Couvercle de recipient s'ouvrant par enlevement d'un disque et caracteristiques pour assurer la securite de l'utilisateur

Publications (1)

Publication Number Publication Date
WO1988005406A1 true WO1988005406A1 (fr) 1988-07-28

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PCT/US1987/002649 WO1988005406A1 (fr) 1987-01-23 1987-09-29 Couvercle de recipient s'ouvrant par enlevement d'un disque et caracteristiques pour assurer la securite de l'utilisateur

Country Status (6)

Country Link
CN (1) CN88100286A (fr)
AR (1) AR243458A1 (fr)
AU (1) AU1109088A (fr)
ES (1) ES2009161A6 (fr)
PT (1) PT86607A (fr)
WO (1) WO1988005406A1 (fr)

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Publication number Priority date Publication date Assignee Title
EP0372687A1 (fr) * 1988-12-02 1990-06-13 Weirton Steel Corporation Fabrication de corps de boîte
WO1998013268A1 (fr) * 1996-09-26 1998-04-02 Glud & Marstrand A/S Boite boisson a couvercle muni d'un anneau d'ouverture

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US3696961A (en) * 1970-10-20 1972-10-10 Continental Can Co Protective edge for easy opening container
US3838788A (en) * 1973-03-15 1974-10-01 Dorn Co V Can end construction
US3874553A (en) * 1973-07-19 1975-04-01 Aluminum Co Of America Easy opening can end with embossed panel
US3941277A (en) * 1975-04-21 1976-03-02 Van Dorn Company Embossed can end construction
US4014455A (en) * 1976-06-21 1977-03-29 American Can Company Accurate flow control container means
US4019648A (en) * 1975-05-19 1977-04-26 The Continental Group, Inc. Childproof closure
US4159061A (en) * 1975-09-08 1979-06-26 Collins Robert E Pop-a-top canning jar lids
US4289250A (en) * 1980-04-28 1981-09-15 The Continental Group, Inc. Easy opening container with tab having separate opening element
US4386713A (en) * 1982-02-24 1983-06-07 Van Dorn Company Full opening steel can end construction
US4406378A (en) * 1981-07-06 1983-09-27 Automated Container Corporation Metallic convenience closure
US4511299A (en) * 1983-09-01 1985-04-16 Automated Container Corporation Pull-tab forming method

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Publication number Priority date Publication date Assignee Title
US3684126A (en) * 1970-04-07 1972-08-15 Werner Reichert Easy-opening can end
US3696961A (en) * 1970-10-20 1972-10-10 Continental Can Co Protective edge for easy opening container
US3838788A (en) * 1973-03-15 1974-10-01 Dorn Co V Can end construction
US3874553A (en) * 1973-07-19 1975-04-01 Aluminum Co Of America Easy opening can end with embossed panel
US3941277A (en) * 1975-04-21 1976-03-02 Van Dorn Company Embossed can end construction
US4019648A (en) * 1975-05-19 1977-04-26 The Continental Group, Inc. Childproof closure
US4159061A (en) * 1975-09-08 1979-06-26 Collins Robert E Pop-a-top canning jar lids
US4014455A (en) * 1976-06-21 1977-03-29 American Can Company Accurate flow control container means
US4289250A (en) * 1980-04-28 1981-09-15 The Continental Group, Inc. Easy opening container with tab having separate opening element
US4406378A (en) * 1981-07-06 1983-09-27 Automated Container Corporation Metallic convenience closure
US4386713A (en) * 1982-02-24 1983-06-07 Van Dorn Company Full opening steel can end construction
US4511299A (en) * 1983-09-01 1985-04-16 Automated Container Corporation Pull-tab forming method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0372687A1 (fr) * 1988-12-02 1990-06-13 Weirton Steel Corporation Fabrication de corps de boîte
WO1998013268A1 (fr) * 1996-09-26 1998-04-02 Glud & Marstrand A/S Boite boisson a couvercle muni d'un anneau d'ouverture
US6126029A (en) * 1996-09-26 2000-10-03 Glud & Marstrand A/S Can with a cover provided with a pull ring

Also Published As

Publication number Publication date
PT86607A (pt) 1989-01-30
AU1109088A (en) 1988-08-10
AR243458A1 (es) 1993-08-31
ES2009161A6 (es) 1989-09-01
CN88100286A (zh) 1988-09-28

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