US3929251A - Container wall with rupturable weakening line - Google Patents

Container wall with rupturable weakening line Download PDF

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Publication number
US3929251A
US3929251A US357937A US35793773A US3929251A US 3929251 A US3929251 A US 3929251A US 357937 A US357937 A US 357937A US 35793773 A US35793773 A US 35793773A US 3929251 A US3929251 A US 3929251A
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US
United States
Prior art keywords
opening panel
rim
web
lip
closure
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
US357937A
Other languages
English (en)
Inventor
Hugh C Urmston
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.)
Alcoa Corp
Original Assignee
Aluminum Company of America
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 Aluminum Company of America filed Critical Aluminum Company of America
Priority to US357937A priority Critical patent/US3929251A/en
Priority to GB3501073A priority patent/GB1436617A/en
Priority to IE1256/73A priority patent/IE38044B1/xx
Priority to SE7310198A priority patent/SE406306B/xx
Priority to IL42852A priority patent/IL42852A/en
Priority to IN1776/CAL/73A priority patent/IN138975B/en
Priority to PH14886A priority patent/PH10677A/en
Priority to FR7328657A priority patent/FR2196275B1/fr
Priority to JP7389159A priority patent/JPS5628779B2/ja
Priority to NO3178/73A priority patent/NO139915C/no
Priority to IT51944/73A priority patent/IT994140B/it
Priority to CH1153773A priority patent/CH584138A5/xx
Priority to NL7311052A priority patent/NL7311052A/xx
Priority to AU59096/73A priority patent/AU473673B2/en
Priority to DD172821A priority patent/DD105169A5/xx
Priority to DE19732366001 priority patent/DE2366001A1/de
Priority to FI2522/73A priority patent/FI53104C/fi
Priority to DE2341077A priority patent/DE2341077C3/de
Priority to AT703973A priority patent/AT347324B/de
Priority to BG024308A priority patent/BG27066A3/xx
Priority to RO7300075783A priority patent/RO62365A/ro
Priority to ES417820A priority patent/ES417820A1/es
Priority to CA178,731A priority patent/CA1007183A/en
Priority to AR249591A priority patent/AR200735A1/es
Priority to US05/521,692 priority patent/US3938455A/en
Priority to ES1975216849U priority patent/ES216849Y/es
Application granted granted Critical
Publication of US3929251A publication Critical patent/US3929251A/en
Priority to CA253,331A priority patent/CA1009091A/en
Priority to HK38/77A priority patent/HK3877A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D17/404—Details of the lines of weakness
    • 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
    • B65D2205/00—Venting means

Definitions

  • ABSTRACT An improved method of forming and a construction for a digitally openable container closure. Included therein is a container wall having an inwardly displaceable opening panel defined by a fracturable web which has been formed by selectively displacing metal adjacent a predetermined line substantially perpendicular to the surface of the container wall and by extruding metal between substantially parallel die surfaces which are disposed at an angle to the plane of the container wall.
  • an integral inclined deflectable portion projecting outwardly from the container wall adjacent the fracturable web and which deflectable portion is adapted to effect, in response to digitally applied inwardly directed pressure, a relative displacement between the rim of the panel and the lip of the adjacent container wall to selectively strain the web and initiate fracture thereof to permit inward displacement of an opening panel of greater extent than the size of the opening formed in the container wall by the separation of said panel.
  • This invention relates to metal container closures and more particularly to an improved method and apparatus for forming and construction for a digitally openable container end closure that not only exceeds the stringent and competitively dictated present day commercial economic and performance criteria but also satisfies all ecology based governmental regulations now extant.
  • advantages of the subject invention are the provisions of a metal container closure construction that exceeds the stringent present day interrelated commercial economic and performance criteria and which also satisfies current ecology based governmental regulations. More specific advantages include the provision of a highly reliable end closure of markedly reduced metal content that can be fabricated with a minimal number of fabricating steps at extremely high production rates with simple tooling. Further advantages include the provision of an end closure that can be opened by application of modest amounts of digitally applied pressure without the use of auxiliary tools and the overcoming of ecology based objection to present day Fraze type severable pull tab closures through inward displacement of a closure panel sized to be larger than the resulting opening in the container wall.
  • the object of this invention is the provision of an improved method and apparatus for forming and construction for a digitally openable container end closure.
  • Another object of the invention is to provide a tabless container wall which can be opened with the fingers.
  • Another object of the invention is to provide a method of forming a container wall with a fracturable web in it which can be easily ruptured when force is applied against one surface of the container wall.
  • Another object of the invention is to provide a container wall with a fracturable web in it defining a removable panel and an adjacent flexible or deflectable bulge for displacing portions of the container wall to facilitate initiation of rupture of the web.
  • FIG. 4 is a section view similar to FIG. 3 and showing the can end after opening
  • FIG. 5 is a perspective view of an alternative embodiment of a closure of the invention.
  • FIG. 6 is a cross section through the closure of FIG.
  • FIG. 7 is a cross section illustrating tools for deforming a container wall in accordance with the invention.
  • FIG. 9 is a cross sectional view similar to FIG. 7 illustrating further displacement of the die members in the formation of a fracturable web in a container wall
  • FIG. 10 is an enlarged cross sectional view of a portion of a presently preferred embodiment of a container wall constructed in accordance with principles of the invention.
  • a container wall or can end 10 which includes a substantially planar central panel 12, a peripheral groove 14 around the panel an upstanding wall 16 outwardly of the groove, a flange 18 extending outwardly from the top of the upstanding wall and a curled edge 20 on the outer end of the flange.
  • a peripherally chimed can end is typical of can ends which are adapted to be sealed on container bodies by conventional double seaming operations.
  • inwardly and outwardly will be herein employed to delineate directions relative to the interior and exterior respectively of a cylindrical container having the end closure of interest mounted on the end thereof.
  • can end further includes at least one, and preferably two, inwardly displaceable opening panels 22 of equal size defined by weakening lines 24 in the form of fracturable webs in central panel 12.
  • Panels 22 are designed to be opened by displacing them into a container on which can end 10 is sealed to form a pouring opening and/or a vent in the can end.
  • each fracturable web 24 may be C-shaped with a bridge of metal between the ends of the line providing a hinge 26 which prevents complete separation of the opening panel 22 from container end 10.
  • Hinge 26 between the ends of the fracturable web 24 may be slightly weakened by a shallow score line or the like, but may also be unweakened for some applications. In case of accidental rupture of the web 24 due to excessively high internal pressures in a container, hinge 26 will prevent complete separation of a removable panel 22 from can end 10. Hinge 26 also normally prevents the panel 22 from dropping into the container after inward displacement thereof.
  • each opening panel 22 is substantially smaller than the can end 10 in which it is provided and constitutes a minor portion, or less than half, of the area of the can end.
  • a marginal edge portion 28 of opening panel 22 adjacent the fracturable web 24 be disposed with respect to an adjacent marginal edge portion 30 of central panel 12 on the other side of the web such that opposite faces of such two marginal edge portions 28 and 30 are disposed in nearly the same plane.
  • such displacement results in the top surface of the edge portion 28 of the opening panel 22 being disposed in nearly the same plane as is the bottom surface of edge portion 30 of the adjacent portion of central panel 12 disposed on the other side of the fracturable web.
  • the central panel 12 has a bulge or bulges formed in it adjacent the fracturable web 24 as is best illustrated in FIGS. 2 and 9.
  • flexing or other digitally induced displacement of such bulge or bulges which constitute at least part of a deflectable portion of the container wall, facilitates rupture of the web 24 by producing relative movement of metal on opposite sides of the web to strain the residual metal and initiate its failure.
  • a bulge 32 may be formed adjacent removable panel 22 or a bulge 33 may be formed within the opening panel 22', as will be described.
  • the adjacent portions of metal on opposite sides of the fracturable web 24 and the flexible deflectable portions 32 and 33 may be formed either outwardly or inwardly directed with respect to the initially undisplaced metal in the container wall.
  • the marginal edge portion 28 of opening panel 22 which is adapted to be sealed on a container for holding relatively high internal pressures, the marginal edge portion 28 of opening panel 22,has preferably been displaced downward with respect to the adjacent portion 30 of central panel 12 on the opposite side of the fracturable web sothat the web will have a greater resistance against rupture due to internal pressure in the container than it will have against rupture due to external pressure applied against opening panel 22.
  • Deflectable portion 32 is preferably formed outwardly with respect to the initially undisplace surface of can end 10 so that finger pressure applied against opening panel 22 or more desirably against said deflectable portion 32 will cause flexing and selective displacement thereof to facilitate initial fracture of the web 24 as will now be explained.
  • depressing the illustrated outwardly domed opening panel 22 causes flexing and displacement of at least portions of central panel 12. While not fully understood at the present time, it is believed that this flexing of portions of central panel 12 causes relative movement of adjacent portions of metal on opposite sides of the fracturable web 24 to thereby stress and fracture the thin residual of metal constituting such web.
  • FIGS. 5 and 6 illustrate another embodiment of a closure incorporating the principles of this invention which is particularly adapted for closing a bottle or other container for food which may be vacuum packed.
  • Closure 34 includes an end wall 36, a peripheral skirt 38 with a curled edge 40 thereon for engaging under a retaining bead or lugs on a container.
  • closure 34 further includes an upwardly domed deflectable button 42 in end wall 36 and two fracturable webs 44 formed in the button near its top. Fracturable webs 44 may be arcuate in shape and concave toward the periphery of the closure leaving a bridge 46 of unweakened metal between the fracturable webs.
  • the metal between the fracturable webs 44 is preferably displaced outwardly with respect to adjacent metal on the opposite sides thereof as illustrated in FIG. 6.
  • bridge 46 When it is desired to open a container on which closure 34 is sealed, bridge 46 may be inwardly displaced to cause failure of at least one of webs 44 and thereby release the vacuum in the container. Releasing the vacuum in a container on which closure 34 is sealed will obviously facilitate removal of the closure from the container by freeing the closure to be more easily moved with respect to the container. It is believed that inward displacement of bridge 46 causes relative movement of metal on opposite sides of fracturable webs 44 to stress the thin residual of metal in the web and thereby facilitate initiation of its rupture.
  • FIGS. 7, 8 and 9 illustrate exemplary tools and a preferred method for forming the particularly contoured fracturable web in accordance with the invention.
  • Such exemplary tools comprise an annular top die 48 and an annular bottom die 50 between which a sheet metal container wall 10 is introduced to have the fracturable web formed therein, an auxiliary outer die means 49 and an optionally employable inner doming tool 51 for controlling the direction in which deflectable portion 32 and domed opening panel 22 are formed in the container wall.
  • Top die 48 has a first substantially planarhorizontal bottom face or base surface 52, an inner face 53 inclined upwardly from base surface 52 to permit the formation of an upwardly domed opening panel, and a second and angularly disposed substantially planar metal extruding surface or face 54 which preferably extends outwardly from the first base surface at approximately a 45 angle, although limited angular departure therefrom may apparently be tolerated.
  • the first base surface 52 and second metal extruding surface 54 of die 48 meet at a relatively sharp corner 56 so that a similar sharp corner will be formed in container wall 10.
  • the corner 56 between the first and second die surfaces 52 and 54 has a radius of less than 0.001 inch, but may tolerate a radius, as for example as would be occasioned by wear, of up to about 0.005 inch on tools for forming a fracturable web in rigid aluminum alloy container sheet having a thickness in a range of 0.010 inch to 0.015 inch which is typical of sheet used in the production of can ends.
  • Bottom die 50 has a first substantially planar base surface or top face 58, a downwardly inclined outer face 59 to permit the formation of a deflectable portion 32 externally adjacent the opening panel 22 and a second and angularly disposed substantially planar metal extruding surface or inner face 60 extending downwardly from the first base surface 58 at approximately a 45 angle.
  • Base surface 58 and metal extruding surface 60 also preferably meet at a relatively sharp corner 62 as do the die faces in top die 48.
  • Metal extruding surfaces 54 and 60 on top and bottom dies 48 and 50 are preferably substantially parallel, although limited departure therefrom can apparently be tolerated.
  • lnner doming tool 51 may further have an upwardly projecting dome 64 on it to form an outwardly domed opening panel 22 which can be concurrently formed therewith.
  • the auxiliary die means 49 and inner doming tool 51 may be integral parts of tools 48 and 50 respectively, or for ease of fabrication may be separate parts as illustrated, but are preferably moved as unitary assemblies during practice of the invention.
  • Inner doming tool 51 may be omitted from the tools where the presently preferred inwardly domed opening panel 22 is to be formed.
  • Auxiliary outer die means 49 is disposed on the same side of container wall as is upper die member 48 and has a metal shaping base surface 49a facing the same general direction as does first base surface 52 of upper die member 48 and is in laterally spaced relation with the first base surface 58 on the lower die member 50.
  • metal from the container wall is first drawn or stretched over dome 64 on inner doming tool 51.
  • the first base surface 52 and the second metal extruding surface 54 of the top die member 48 are lineally displaced toward the second angularly disposed metal extruding surface 60 and first base surface 58 respectively of the second die member 60 and with the corners 56 and 62 being maintained in laterally spaced relation as described above.
  • metal from container wall 10 begins to be displaced or moved by the base die surfaces 52 and 58 substantially perpendicular, or a right angles, to the initially undisplaced surface of the container wall.
  • metal in container wall 10 is squeezed between the metal extruding surfaces 54 and 60 of the dies to cause lateral flow or extrusion of metal away from the fracturable web while metal is also being displaced at substantially right angles to the initially undisplaced surface of the container wall.
  • the described lineal displacement of the top die member 48 toward the lower die member 50 continues until the first base surface 52 thereof is disposed substantially coplanar with the first base surface 58 of lower die member 50. [t is believed that this lateral flow or extrusion of metal away from the fracturable web which is being formed is important in preventing cracks from forming in, and premature severance of the web.
  • metal may be sheared or cut by the tools as is done in typical blanking or punching operations in which the metal is separated or sheared along the line of the tools before the dies have completely penetrated the metal.
  • the present invention substantially eliminates the formation of cracks or failures in the fracturable web because metal is extruded laterally away from the web during the right angle displacement of metal to cause lateral flow of metal approximately as fast as the metal is being displaced at right angles so that the metal is not sheared or separated by such right angle displacement.
  • container ends of the type disclosed can be formed at high rates of press operation to produce 300 or more ends per minute per die set up with few or no defective can ends.
  • Lateral metal flow away from the fracturable web that is being formed also produces an increased surface area of metal in a can end for forming the desired deflectable portion in the metal adjacent the web.
  • deflectable portion 32 is believed to facilitate rupture of the fracturable web.
  • the tools illustrated in FIGS. 7-9, the auxiliary die means 49 and the inner doming tool 51 respectively control the direction in which the increased area of metal is formed so that deflectable portion 32 and domed opening panel 22 project outwardly with respect to the original undisplaced surface of the can end.
  • similar tools could also control the metal working so that the bulges or deflectable portions would be formed downward (i.e., inwardly) on one or both sides of the fracturable web if desired.
  • auxiliary die means 49 controls the formation of the preferred outwardly projecting deflectable portion 32 adjacent the fracturable web 24 by restraining the metal distal the fracturable web so that the metal bows upward over bottom die 50 as is 9 also illustrated in FIG. 9.
  • the auxiliary die means 49 is lineally displaced to selectively move the base surface 49a thereof into predetermined longitudinally offset relations with the first base surface 58 of lower die member 50 in the direction of die displacement.
  • the amount of lateral spacing .x" between the corners 56 and 62 in the horizontal direction may vary depending upon the alloy, temper and thickness of the metal in container wall, the angle of the metal extruding surfaces 54 and 60, and the residual thickness of metal to be left in the fracturable web among other factors.
  • Such lateral spacing is preferably in the range of l/4 to 1/6 of the thickness of the container wall in which the fracturable web is formed, but may be from 5 percent to 50 percent of the metal thickness for some applications.
  • an overlap x of die surfaces 54 and 60 of approximately 0.0032 inch has been found to work well in forming a fracturable web in a container wall made from a sheet of hard temper aluminum base alloy 0.013 inch thick.
  • the dies were moved toward one another until base surfaces 52 and 58 were within approximately 0.001 inch of coplanar orientation. This produced a fracturable web with a thin residual of metal approximately 0.004 inch thick with no cracks therein.
  • FIG. illustrates a presently preferred configuration of a metal end closure incorporating the principles of this invention.
  • a central panel 12 having a least one circular and relatively rigid opening panel 22 contoured to include an inwardly domed center portion 33 bounded by a rim 28 peripherally terminating in a fracturable web 24.
  • the web 24 interconnects the rim 28 with a lip 30 of an integral outwardly projecting deflectable portion 32 of generally frustoconical configuration surrounding the opening panel 22 in the adjacent portion of the container wall.
  • rim 28 has a substantially planar upper surface 70 which terminally intersects an angularly inclined surface 72 defining the inner marginal edge of lip 30 of deflectable portion 32 in an exposed corner 74.
  • Lip 30 has a substantially planar undersurface 76 disposed in substantially coplanar relation with the upper surface 70 of rim 28 and which terminally intersects an angularly inclined surface 78 defining the outer marginal edge of the rim 28 of the panel 22 in a second corner 80.
  • the corners 74 and 80 are disposed in predetermined laterally spaced relation and define therebetween the lateral extent of the fracturable web 24.
  • the opening panel 22 is preferably of relatively rigid character to resist bending thereof and thereby insure that the displacement of the deflectable portion 32 will create sufficient relative displacement of the lip 30 thereof with respect to the rim 28 of the opening panel 22 to initiate web fracture.
  • the lateral spacing corners of 74 and are selected to define a web of at least a predetermined minimal extend sufficient to maintain its structural integrity during exposure to variations in the magnitude of the residual stress therein occasioned by normal container handling and usage and less than a predetermined maximum extent that would preclude said displacement induced fracture thereof in response to said digitally applied inwardly directed pressure.
  • a peripherally chimed sheet metal container component having a wall with at least one inwardly displaceable opening panel therein non-concentric with the peripheral chime around the container component and constituting a minor portion of the component, said opening panel having an integral rim therearound peripherally terminating in a fracturable web defining a locus of separation of said opening panel from the adjacent portion of said wall,
  • the rim of said opening panel including an outwardly exposed surface terminally intersecting the outwardly exposed marginal edge of the lip of said deflectable portion in an outwardly exposed corner
  • said deflectable portion having a portion of the undersurface thereof terminally meeting the undersurface of the outer marginal edge of said rim in predetermined spaced relation with said exposed corner to define therebetween the extent of said fracturable web
  • said opening panel including means for imparting greater rigidity thereto than that of said deflectable portion disposed adjacent thereto to effect an initiation, in response to digitally applied localized inwardly directed pressure against said deflectable 12 portion at a location spaced from the peripheral chime around the container component, of relative displacement of said lip relative to said rim to strain said web and induce fracture thereof to permit inward displacement of a separated opening panel.
  • a sheet metal end closure for a container comprismg a generally planar wall portion peripherally chimed for securement to a container body, at least one inwardly displaceable relatively rigid opening panel integrally included therein non-concentric with the peripheral chime around the closure and constituting a minor portion of the closure, said opening panel having a center portion and an integral rim therearound peripherally terminating in a fracturable web defining a locus of separation of said opening panel from said wall portion,
  • said opening panel including means for imparting greater rigidity thereto than that of said deflectable portion disposed adjacent thereto to effect an initiation, in response to digitally applied localized inwardly directed pressure against said deflectable portion at a location spaced from the peripheral chime around the closure, of relative displacement of the lip thereof relative to the rim of said opening panel to stress said web and initiate fracture thereof to permit inward displacement of a separated opening panel of greater rim size than the size of the opening formed in said wall portion as defined by the inner marginal edge of the lip of said deflectable portion.
  • said rim of said opening panel including an upper planar surface terminally intersecting an angularly inclined surface defining the inner marginal edge of the lip of said deflectable portion in a first outwardly exposed corner
  • said lip of said deflectable portion including a planar undersurface disposed substantially coplanar with the upper surface of said rim of said opening panel and terminally intersecting an angularly inclined surface defining the outer marginal edge of the rim of said opening panel in a second corner disposed in predetermined laterally spaced relation with said first corner to define, by the overlap therebetween, the lateral extent of said fracturable web,
  • said opening panel including means for imparting greater rigidity thereto than that of said deflectable portion to effect in response to digitally applied inwardly directed pressure against the deflectable portion at a location spaced from the peripheral chime around the closure, a directional relative displacement of the lip thereof with the rim of said opening panel to initiate fracture of said web to permit inward displacement of a separated opening panel of greater rim size than the size of the opening formed in said wall portion as defined by the terminal edge of the angularly inclined surface of the lip of said deflectable portion,
  • a sheet metal end closure of at least three-quarter hard temper aluminum alloy of a thickness in the range of 0.010 inch to 0.0l5 inch suitable for a pressurized fluid container comprising a generally planar wall portion peripherally chimed for securement to a container body,
  • At least one hinged inwardly displaceable relatively rigid circular opening panel integrally included therein having an inwardly domed center portion and a selectively shaped rim peripherally terminating in a particularly contoured, residually stressed and annularly shaped fracturable web defining a locus of separation of said hinged opening panel from said wall portion,
  • said rim of said opening panel including an upper planar surface terminally intersecting at an angle of about an angularly inclined surface defining the inner marginal edge of the lip of said deflectable portion in a first exposed corner
  • said lip of said deflectable portion including a planar undersurface disposed substantially coplanar with the upper surface of the rim of said opening panel and terminally intersecting at an angle of about 135 an angularly inclined surface defining the outer marginal edge of the rim of said opening panel in a second corner disposed in predetermined laterally spaced relation with said first corner to define, by the overlap therebetween, the lateral extent of said fracturable web, and having a permitted difference in elevation therebetween of no greater than 0.001 inch,
  • said deflectable portion being adapted to effect, in
  • the lateral spacing of said first and second corners being no more than 0.004 inches and defining a web of at least a predetermined minimal extent sufficient to maintain its structural integrity during exposure to variations in the magnitude of the residual stress therein occasioned by normal container handling and usage and less than a predetermined maximum extent that would preclude said fracture thereof in response to said digitally applied inwardly directed pressure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
US357937A 1972-08-17 1973-05-07 Container wall with rupturable weakening line Expired - Lifetime US3929251A (en)

Priority Applications (28)

Application Number Priority Date Filing Date Title
US357937A US3929251A (en) 1972-08-17 1973-05-07 Container wall with rupturable weakening line
IE1256/73A IE38044B1 (en) 1972-08-17 1973-07-23 Digitally openable metal container closure and method and apparatus for forming such closure
SE7310198A SE406306B (sv) 1972-08-17 1973-07-23 Komponent i en metallplatbehalla samt forfarande och apparat for tillverkning av komponenten
GB3501073A GB1436617A (en) 1972-08-17 1973-07-23 Digitally openable container closure and method and apparatus for forming such closure
IL42852A IL42852A (en) 1972-08-17 1973-07-30 Metal container closures
IN1776/CAL/73A IN138975B (enrdf_load_html_response) 1972-08-17 1973-08-01
PH14886A PH10677A (en) 1973-05-07 1973-08-03 Container wall with rupturable weakening line
FR7328657A FR2196275B1 (enrdf_load_html_response) 1972-08-17 1973-08-06
JP7389159A JPS5628779B2 (enrdf_load_html_response) 1972-08-17 1973-08-08
IT51944/73A IT994140B (it) 1972-08-17 1973-08-09 Barattolo con chiusura apribile con le dita e metodo ed apparecchio per la formazione di essa
CH1153773A CH584138A5 (enrdf_load_html_response) 1972-08-17 1973-08-09
NL7311052A NL7311052A (enrdf_load_html_response) 1972-08-17 1973-08-09
AU59096/73A AU473673B2 (en) 1972-08-17 1973-08-09 Method of forming anda construction fora digitally openable container closure
NO3178/73A NO139915C (no) 1972-08-17 1973-08-09 Beholderendeplate av metall, samt fremgangsmaate og apparat for dens fremstilling
DD172821A DD105169A5 (enrdf_load_html_response) 1972-08-17 1973-08-10
DE19732366001 DE2366001A1 (de) 1972-08-17 1973-08-10 Verfahren und vorrichtung zur ausbildung eines mit dem finger zu oeffnenden behaelter-verschlusses
FI2522/73A FI53104C (enrdf_load_html_response) 1972-08-17 1973-08-10
DE2341077A DE2341077C3 (de) 1972-08-17 1973-08-10 Blechbehälterdeckel mit mindestens einem in den Behälter bewegbaren biegesteifen Verschlußteil
AT703973A AT347324B (de) 1972-08-17 1973-08-10 Blechbehaelterteil sowie verfahren und vorrichtung zum herstellen desselben
RO7300075783A RO62365A (fr) 1972-08-17 1973-08-11 Couvercle pour container et dispositif de realisation
ES417820A ES417820A1 (es) 1972-08-17 1973-08-11 Un metodo y su correspondiente aparato para la formacion deun componente de recipiente de chapa metalica.
BG024308A BG27066A3 (bg) 1972-08-17 1973-08-11 Ръчно отваряем капак на опаковка-кутия
CA178,731A CA1007183A (en) 1972-08-17 1973-08-14 Method of forming and a construction for a digitally openable container closure
AR249591A AR200735A1 (es) 1972-08-17 1973-08-16 Componente para envase de metal laminado con por lo menos un panel de apertura desplazable hacia adentro de la misma, mediante una cinta continua fracturable
US05/521,692 US3938455A (en) 1973-05-07 1974-11-07 Method of forming and a construction for a digitally openable container closure
ES1975216849U ES216849Y (es) 1972-08-17 1975-11-20 Componente de recipiente de chapa metalica.
CA253,331A CA1009091A (en) 1973-05-07 1976-05-26 Method of forming and a construction for a digitally openable container closure
HK38/77A HK3877A (en) 1972-08-17 1977-01-20 Digitally openable container closure, and method and apparatus for forming such closure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28154172A 1972-08-17 1972-08-17
US357937A US3929251A (en) 1972-08-17 1973-05-07 Container wall with rupturable weakening line

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US28154172A Continuation-In-Part 1972-08-17 1972-08-17

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US05/521,692 Division US3938455A (en) 1973-05-07 1974-11-07 Method of forming and a construction for a digitally openable container closure

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US3929251A true US3929251A (en) 1975-12-30

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Cited By (29)

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US3997076A (en) * 1974-05-02 1976-12-14 Aluminum Company Of America Tabless container opening device
US4003494A (en) * 1976-01-14 1977-01-18 Aluminum Company Of America Sheet metal container component
US4027612A (en) * 1975-07-16 1977-06-07 Continental Can Company, Inc. Method for forming container scored metal flap areas
US4081104A (en) * 1977-05-25 1978-03-28 Coors Container Company Container end member with an integral hinged opening tab having indentation thereon
US4154184A (en) * 1976-07-01 1979-05-15 Coors Container Company Apparatus and methods for manufacture of can end member
US4215795A (en) * 1979-02-02 1980-08-05 Owens-Illinois, Inc. End structure for a can body and method of making same
US4928844A (en) * 1989-04-14 1990-05-29 Aluminum Company Of America Pressure release for carbonated beverage containers
US4932555A (en) * 1989-04-14 1990-06-12 Aluminum Company Of America Resealable cap hinge structure
US4957216A (en) * 1989-04-17 1990-09-18 Aluminum Company Of America Anchor for plastic cap
US4976368A (en) * 1989-10-23 1990-12-11 Klein Gerald B Concentric convenience opening beverage can end
US4982862A (en) * 1989-04-14 1991-01-08 Aluminum Company Of America Digitally openable, resealable container closure
US4991732A (en) * 1989-04-14 1991-02-12 Aluminum Company Of America Excess pressure vent for resealable beverage cap
US5121851A (en) * 1990-10-29 1992-06-16 Aluminum Company Of America Resealable container closure
US5147057A (en) * 1990-10-18 1992-09-15 Hoover Universal, Inc. Inverted closures for beverage containers
US5148935A (en) * 1990-10-22 1992-09-22 Aluminum Company Of America Venting resealable container closure and associated closure container-combination
US5232113A (en) * 1991-10-11 1993-08-03 Aluminum Company Of America Venting resealable container closure and associated method of manufacture
US5307947A (en) * 1989-11-30 1994-05-03 Coors Brewing Company Container end member
US5680952A (en) * 1994-09-12 1997-10-28 Ball Corporation End constructions for containers
US5974851A (en) * 1995-10-24 1999-11-02 Bs&B Systems, Inc. Rupture disk apparatus and methods
WO2001051364A1 (en) * 1999-12-17 2001-07-19 Maekinen Mauri A lid for a preserving-jar
US6494074B2 (en) * 1999-05-13 2002-12-17 Bs&B Safety Systems, Inc. Rupture disk assembly
US6840668B1 (en) * 2003-07-25 2005-01-11 Waters Investment Limited Thermogravimetrical analyzer autosampler sealed sample pan
US20050218106A1 (en) * 2004-03-15 2005-10-06 Yui George M Cap for liquid container
US20070108209A1 (en) * 2002-06-11 2007-05-17 Jeong-Wook Jeon Easily openable can lid
US20090223956A1 (en) * 2004-08-10 2009-09-10 Daiwa Can Company Can container
US20100287886A1 (en) * 2009-05-14 2010-11-18 Crown Packaging Technology, Inc. Method of forming a can end having a moveable portion
US20110212225A1 (en) * 2008-10-08 2011-09-01 Alain Mariller Capsule for preparing a beverage
US9016034B2 (en) 2008-09-04 2015-04-28 Crown Packaging Technology, Inc. Easily openable can end, container, and methods of forming
US9199763B2 (en) 2008-01-18 2015-12-01 Crown Packaging Technology, Inc. Can end

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US3227304A (en) * 1964-09-08 1966-01-04 Charles T Ashury Can opening arrangement
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US3362569A (en) * 1964-08-24 1968-01-09 Joseph A. Geiger Container closures with breakable openings
US3638825A (en) * 1969-07-16 1972-02-01 Metal Box Co Ltd Can ends
US3730381A (en) * 1971-03-02 1973-05-01 Metal Box Co Ltd Can end opening means
US3759206A (en) * 1970-09-16 1973-09-18 Broken Hill Pty Co Ltd Push-in easy-opening closures
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US2210225A (en) * 1937-05-24 1940-08-06 Easycantop Ltd Can
US3362570A (en) * 1964-08-24 1968-01-09 Joseph A. Geiger Container with breakable end closure
US3362569A (en) * 1964-08-24 1968-01-09 Joseph A. Geiger Container closures with breakable openings
US3227304A (en) * 1964-09-08 1966-01-04 Charles T Ashury Can opening arrangement
US3221924A (en) * 1964-12-11 1965-12-07 Harvey Aluminum Inc Can opener
US3292826A (en) * 1965-01-18 1966-12-20 Abplanalp Robert Henry Aerosol can protected against explosion
US3638825A (en) * 1969-07-16 1972-02-01 Metal Box Co Ltd Can ends
US3759206A (en) * 1970-09-16 1973-09-18 Broken Hill Pty Co Ltd Push-in easy-opening closures
US3730381A (en) * 1971-03-02 1973-05-01 Metal Box Co Ltd Can end opening means
US3779417A (en) * 1972-02-14 1973-12-18 G Klein Flex tab for a gated can lid

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997076A (en) * 1974-05-02 1976-12-14 Aluminum Company Of America Tabless container opening device
US4027612A (en) * 1975-07-16 1977-06-07 Continental Can Company, Inc. Method for forming container scored metal flap areas
US4003494A (en) * 1976-01-14 1977-01-18 Aluminum Company Of America Sheet metal container component
US4154184A (en) * 1976-07-01 1979-05-15 Coors Container Company Apparatus and methods for manufacture of can end member
US4081104A (en) * 1977-05-25 1978-03-28 Coors Container Company Container end member with an integral hinged opening tab having indentation thereon
US4215795A (en) * 1979-02-02 1980-08-05 Owens-Illinois, Inc. End structure for a can body and method of making same
US4928844A (en) * 1989-04-14 1990-05-29 Aluminum Company Of America Pressure release for carbonated beverage containers
US4932555A (en) * 1989-04-14 1990-06-12 Aluminum Company Of America Resealable cap hinge structure
US4982862A (en) * 1989-04-14 1991-01-08 Aluminum Company Of America Digitally openable, resealable container closure
US4991732A (en) * 1989-04-14 1991-02-12 Aluminum Company Of America Excess pressure vent for resealable beverage cap
US4957216A (en) * 1989-04-17 1990-09-18 Aluminum Company Of America Anchor for plastic cap
US4976368A (en) * 1989-10-23 1990-12-11 Klein Gerald B Concentric convenience opening beverage can end
US5307947A (en) * 1989-11-30 1994-05-03 Coors Brewing Company Container end member
US5147057A (en) * 1990-10-18 1992-09-15 Hoover Universal, Inc. Inverted closures for beverage containers
US5148935A (en) * 1990-10-22 1992-09-22 Aluminum Company Of America Venting resealable container closure and associated closure container-combination
US5121851A (en) * 1990-10-29 1992-06-16 Aluminum Company Of America Resealable container closure
US5232113A (en) * 1991-10-11 1993-08-03 Aluminum Company Of America Venting resealable container closure and associated method of manufacture
US5680952A (en) * 1994-09-12 1997-10-28 Ball Corporation End constructions for containers
US5974851A (en) * 1995-10-24 1999-11-02 Bs&B Systems, Inc. Rupture disk apparatus and methods
US6494074B2 (en) * 1999-05-13 2002-12-17 Bs&B Safety Systems, Inc. Rupture disk assembly
WO2001051364A1 (en) * 1999-12-17 2001-07-19 Maekinen Mauri A lid for a preserving-jar
US8113375B2 (en) * 2002-06-11 2012-02-14 Crown Packaging Technology, Inc. Easily openable can lid having a movable portion
US20070108209A1 (en) * 2002-06-11 2007-05-17 Jeong-Wook Jeon Easily openable can lid
US8371467B2 (en) 2002-06-11 2013-02-12 Crown Packaging Technology, Inc. Easily openable can lid having a movable portion
US8733576B2 (en) 2002-06-11 2014-05-27 Crown Packaging Technology, Inc. Easily openable can lid having a movable portion for pull tab access
US20050018746A1 (en) * 2003-07-25 2005-01-27 Reader John R. Thermogravimetrical analyzer autosampler sealed sample pan
US6840668B1 (en) * 2003-07-25 2005-01-11 Waters Investment Limited Thermogravimetrical analyzer autosampler sealed sample pan
US20050218106A1 (en) * 2004-03-15 2005-10-06 Yui George M Cap for liquid container
US20090223956A1 (en) * 2004-08-10 2009-09-10 Daiwa Can Company Can container
US9199763B2 (en) 2008-01-18 2015-12-01 Crown Packaging Technology, Inc. Can end
US9016034B2 (en) 2008-09-04 2015-04-28 Crown Packaging Technology, Inc. Easily openable can end, container, and methods of forming
US20110212225A1 (en) * 2008-10-08 2011-09-01 Alain Mariller Capsule for preparing a beverage
US20100287886A1 (en) * 2009-05-14 2010-11-18 Crown Packaging Technology, Inc. Method of forming a can end having a moveable portion
US8454292B2 (en) 2009-05-14 2013-06-04 Crown Packaging Technology, Inc. Method of forming a can end having a moveable portion

Also Published As

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IN138975B (enrdf_load_html_response) 1976-04-17
CA1007183A (en) 1977-03-22
AU5909673A (en) 1975-03-06
AU473673B2 (en) 1976-07-01

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