US3858753A - Easy-open can end - Google Patents

Easy-open can end Download PDF

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Publication number
US3858753A
US3858753A US379095A US37909573A US3858753A US 3858753 A US3858753 A US 3858753A US 379095 A US379095 A US 379095A US 37909573 A US37909573 A US 37909573A US 3858753 A US3858753 A US 3858753A
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US
United States
Prior art keywords
rivet
beads
pair
percent
panel
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
US379095A
Inventor
Donald Roger Brautigam
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.)
Stolle Corp
Original Assignee
Stolle Corp
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 Stolle Corp filed Critical Stolle Corp
Priority to US379095A priority Critical patent/US3858753A/en
Priority to AR253474A priority patent/AR203199A1/en
Priority to BE143577A priority patent/BE814151R/en
Priority to DE2420082A priority patent/DE2420082A1/en
Priority to AU68537/74A priority patent/AU486142B2/en
Priority to GB2024874A priority patent/GB1426308A/en
Priority to FR7416508A priority patent/FR2236740B1/fr
Priority to JP49054641A priority patent/JPS5834337B2/en
Priority to FI1603/74A priority patent/FI55475C/en
Priority to BR4503/74A priority patent/BR7404503A/en
Priority to IT51386/74A priority patent/IT1046313B/en
Priority to NLAANVRAGE7407960,A priority patent/NL180401C/en
Priority to CH848574A priority patent/CH578975A5/xx
Priority to SE7409014A priority patent/SE7409014L/en
Priority to DK372874A priority patent/DK372874A/da
Priority to CA204,671A priority patent/CA969116A/en
Application granted granted Critical
Publication of US3858753A publication Critical patent/US3858753A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D17/00Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/42Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions with cutting, punching, or cutter accommodating means
    • B65D17/46Wires, strings or the like, e.g. rip cords
    • B65D17/462Tearing-strips or -wires
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D17/00Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28Rigid 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
    • B65D17/401Rigid 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
    • B65D17/4011Rigid 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

Definitions

  • the invention relates to the solution of a problem which was sought to be solved by a copending application in the name of Elton G. Kaminski, Ser. No. 113,330 filed Feb. 8, 1971, and in the parent application of the present invention.
  • the parent application sought to-solve the problem by means of a pair of beads, one on each side of the rivet, but at that time the parameters which are necessary in order toboth prevent rivet failure and not unduly to increase the effort required to open the can were not known.
  • the objects of the present invention are substantially the same as those of the copending applications, i.e. to provide a beverage type or a full panel easy-open can end in which the strain on the rivet during the opening operation and particularly during the first phase'thereof is relieved so as to preclude rivet failure. At the same time, it is an object to accomplish prevention of rivet failure while at the same time not unduly increasing the effort necessary to open the can.
  • FIG. 1 is a perspective view of a can end showing rivet failure.
  • FIG. 2 is a view similar to FIG. 1 showing a proper opening without rivet failure.
  • FIG. 3 is a plan view of a can end showing the beads which accomplish the object of the invention.
  • FIG. 4 is a view similar to FIG. 4 showing a modification
  • FIG. 5 is a diagram showing the parameters necessary in order to achieve the desired results.
  • FIG. 1 demonstrates what happens with conventional construction. It shows the underside of a panel of conventional form which has been torn from a can by means of a pull tab 19. At 20 it will be observed that the rivet has ruptured. When this happens, it is often impossible properly to remove the easy-open panel from the can.
  • FIG. 2 shows a similar view of a can end according to the present invention'which has been opened and the underside of the removed panel 21 is shown in this Figure. It will be observed that the rivet has not been broken and thus a part of the object of the invention has been achieved.
  • a can end is indicated generally at 10. It is provided with a circular score line 11 defining the panel which is removed when the pull tab is actuated.
  • the rivet which secures the pull tab to the top side of the can is indicated at 12.
  • At 13 are indicated parallel beads. These beads are preferably depressed, but they will function equally well if raised. These beads are parallel to a diameter of the can end through its center 14, the diameter being indicated by the broken line 15.
  • the broken line 16 indicates a tangent to the rear side of the rivet, i.e. the side of the rivet toward the center of the can end, which tangent is normal to the diameter 15.
  • Additional beads are indicated at 23 and these beads are generally parallel to the score line 11 so that they make a Vee configuration with the respective beads 13.
  • the beads may be joined together in a continuous Vee or J-shaped bead as indicated'at 33.
  • FIG. 5 is a diagram showing the relationship of the beads 13 to the rivet 12.
  • the dimension A should be equal to about the rivet diameter plus one-sixteenth inch and the beads 13 should be equally spaced on either side of the rivet 12. They are of course parallel to the line 15 mentioned above.
  • the dimension B should be not less than 40 percent nor more than percent of the rivet diameter.
  • the beads 13 should not extend upward as shown in FIG. 6 beyond a tangent to the rivet 12 perpendicular to the line 15.
  • the dimension C should be not less than 73 percent nor more than 83 percent of the rivet diameter. If beads extend less than 73 percent toward the center of the can, insufficient stress is removed from the rivet and rivet failure is likely to happen. On the other hand, if the beads extend more than 83 percent (dimension C), the opening effort is increased to the point that it is unsatisfactory.
  • the beads 23 and the portions 23a of the beads 33 act as stiffeners on each side of the tab.
  • these stiffening beads cause more of the panel to fold downward toward the inside of the can.
  • a greater arc length of score line to each side of the tab nose is initially fractured. This causes a fold line to assume a more normal position with respect to the ends of the beads which are closest to the center of the end.
  • an easy-open metal can end having an integral rivet, a pull tab secured to said panel by means of said rivet, said panel being defined by a score line having a relatively high residual; a first pair of beads disposed equidistantly, one on each side of said rivet, substantially parallel to each other and to a diameter of said can passing through said rivet, and a second pair of beads generally parallel to the periphery of said can end, one of said second pair of beads being associated with each of said first pair of beads in a Vee configuration with the apex of said Vee configuration pointing toward the periphery of the can end.
  • each of said first pair of beads extends forwardly of the rivet center between about forty percent and about fifty percent of the rivet diameter.
  • each of said first pair of rivets extends rearwardly of the rivet center between about seventy-three percent and about eightythree percent of the rivet diameter.
  • each of said first pair of beads extending forwardly of the rivet center between about 40 percent and about 50 percent of the rivet diameter, and rearwardly thereof between about 73 percent and about 83 percent of the rivet diameter.
  • FIG. 4 is a view similar to FIG. 3 showing a modification

Abstract

This application discloses a can end having a scored tear-out panel and an integral rivet securing a pull tab to said panel, wherein the tear-out panel may provide for removal of substantially the full end panel. In order to prevent failure of the rivet during the initial opening process while at the same time not increasing the effort required to open the tear-out panel, beads are provided, one on each side of the rivet, in an outwardly facing Vee configuration. Each Vee may be composed of two separate beads or the Vee may be a continuous bead. The application gives the necessary parameters to achieve the desired results.

Description

United States Patent 1191 Brautigam Jan. 7, 1975 [5 EASY-OPEN CAN END 3,662,916 5/1952 HOlk, Jr. 220/54 7 ld 5] Inventor 32?: Roger Brautigam, S1dney, Primary Examiner George T. Ha
Attorney, Agent, or Firm-Melville Strasser, Foster & [73] Assignee: The Stolle Corporation, Sidney, Hoffman Ohio 122 Filed: July 13, 1973 [571 ABSTRACT This application discloses a can end having a scored [2]] Appl 379095 tear-out panel and an integral rivet securing a pull tab Related US. Application Data to said panel, wherein the tear-out panel may provide [63] continuatiommpart of Sen 241,535, April 6 for removal of substantlally the full end panel. In 1972, abandone order to prevent failure of the r1vet durmg the init1al opening process while at the same time not increasing 52] US. Cl ..220 273, 220/276 the effort required to p the tear-Out p l, beads [51] Int. CL; ..I. B651T17/i4 are Provided, one on a h sid of the rivet, in an [58] Field of Search 220/48, 54 wardly facing Vee configuration- Eaeh Vee may be composed of two separate beads or the Vee may be a [56] Refer n Cit d 7 continuous bead. The application gives the necessary UNITED STATES PATENTS parameters to achieve the desired results.
3,591,037 7/1971 Schrecker 220/54 7 Claims, 5 a g Figures EASY-OPEN CAN END BRIEF SUMMARY OF THE INVENTION This application is a continuation-in-part of an application, Ser. No. 241,535 filed Apr. 6, 1972, now abandoned.
The invention relates to the solution of a problem which was sought to be solved by a copending application in the name of Elton G. Kaminski, Ser. No. 113,330 filed Feb. 8, 1971, and in the parent application of the present invention.
It was pointed out in said copending applications that easy-open ends for cans have come generally into widespread use, particularly when solid foods are packed in cans, substantially the full end panel must be removed. Examples of foods which are packed in cans of this nature are things such as peanuts, potato sticks, candy, ground coffee, and the like.
Many of these materials now packaged in easy-open cans are packaged under high vacuum or high pressure; and in order to avoid danger of either explosion or implosion of thecan end, the scoring residual is made relatively high. The presence of a heavier residual in the score places a greater strain on the rivet head during the opening process and particularly during initial portion of the opening process. In the opening of such an easy-open can, the pull tab is first lifted, thereby puncturing the can end, bending a portion of the end downwardly into the can. Thereafter, the panel with the score line is pulled upwardly by means of the pull tab to remove the panel from the can. During the initial lifting of the tab and bending down of a portion of the end, the rivet is subjected to substantial stress and it is at this point that failure mostoften takes place.
As was also pointed out in said copending applications, various procedures have been adopted in the past to try to overcome the problem of rivet failure. Some of these involve lancing of the tab or scoring behind the rivet; but these attempts have not been uniformly successful because of the wide range of products which are packaged in easy-open containers.
The parent application sought to-solve the problem by means of a pair of beads, one on each side of the rivet, but at that time the parameters which are necessary in order toboth prevent rivet failure and not unduly to increase the effort required to open the can were not known.
The objects of the present invention, therefore, are substantially the same as those of the copending applications, i.e. to provide a beverage type or a full panel easy-open can end in which the strain on the rivet during the opening operation and particularly during the first phase'thereof is relieved so as to preclude rivet failure. At the same time, it is an object to accomplish prevention of rivet failure while at the same time not unduly increasing the effort necessary to open the can.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a can end showing rivet failure.
FIG. 2 is a view similar to FIG. 1 showing a proper opening without rivet failure.
FIG. 3 is a plan view of a can end showing the beads which accomplish the object of the invention.
FIG. 4 is a view similar to FIG. 4 showing a modification; and
FIG. 5 is a diagram showing the parameters necessary in order to achieve the desired results.
DETAILED DESCRIPTION FIG. 1 demonstrates what happens with conventional construction. It shows the underside of a panel of conventional form which has been torn from a can by means of a pull tab 19. At 20 it will be observed that the rivet has ruptured. When this happens, it is often impossible properly to remove the easy-open panel from the can.
FIG. 2 shows a similar view of a can end according to the present invention'which has been opened and the underside of the removed panel 21 is shown in this Figure. It will be observed that the rivet has not been broken and thus a part of the object of the invention has been achieved.
In FIG. 3 a can end is indicated generally at 10. It is provided with a circular score line 11 defining the panel which is removed when the pull tab is actuated. The rivet which secures the pull tab to the top side of the can is indicated at 12. At 13 are indicated parallel beads. These beads are preferably depressed, but they will function equally well if raised. These beads are parallel to a diameter of the can end through its center 14, the diameter being indicated by the broken line 15. The broken line 16 indicates a tangent to the rear side of the rivet, i.e. the side of the rivet toward the center of the can end, which tangent is normal to the diameter 15.
Additional beads are indicated at 23 and these beads are generally parallel to the score line 11 so that they make a Vee configuration with the respective beads 13.
As shown in a modification in FIG. 4, the beads may be joined together in a continuous Vee or J-shaped bead as indicated'at 33.
FIG. 5 is a diagram showing the relationship of the beads 13 to the rivet 12. The dimension A should be equal to about the rivet diameter plus one-sixteenth inch and the beads 13 should be equally spaced on either side of the rivet 12. They are of course parallel to the line 15 mentioned above.
The dimension B should be not less than 40 percent nor more than percent of the rivet diameter. In other words, the beads 13 should not extend upward as shown in FIG. 6 beyond a tangent to the rivet 12 perpendicular to the line 15.
The dimension C should be not less than 73 percent nor more than 83 percent of the rivet diameter. If beads extend less than 73 percent toward the center of the can, insufficient stress is removed from the rivet and rivet failure is likely to happen. On the other hand, if the beads extend more than 83 percent (dimension C), the opening effort is increased to the point that it is unsatisfactory.
The beads 23 and the portions 23a of the beads 33 act as stiffeners on each side of the tab. Thus, when the end is initially opened, these stiffening beads cause more of the panel to fold downward toward the inside of the can. In other words, a greater arc length of score line to each side of the tab nose is initially fractured. This causes a fold line to assume a more normal position with respect to the ends of the beads which are closest to the center of the end.
It will be clear that minor modifications may be made without departing from the spirit of the invention. No limitation not specifically set forth in the claims is therefore intended and no such limitation should be implied.
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. In an easy-open metal can end having an integral rivet, a pull tab secured to said panel by means of said rivet, said panel being defined by a score line having a relatively high residual; a first pair of beads disposed equidistantly, one on each side of said rivet, substantially parallel to each other and to a diameter of said can passing through said rivet, and a second pair of beads generally parallel to the periphery of said can end, one of said second pair of beads being associated with each of said first pair of beads in a Vee configuration with the apex of said Vee configuration pointing toward the periphery of the can end.
2. The structure of claim 1, wherein the distance between said first pair of beads is equal to about the rivet diameter plus one-sixteenth inch.
3. The structure of claim 1, wherein each of said first pair of beads extends forwardly of the rivet center between about forty percent and about fifty percent of the rivet diameter.
4. The structure of claim 1, wherein each of said first pair of rivets extends rearwardly of the rivet center between about seventy-three percent and about eightythree percent of the rivet diameter.
5. The structure of claim 1, wherein the beads forming each of said Vee configurations are connected so as to be continuous.
6. The structure of claim 1, wherein the distance between said first pair of beads is equal to about the rivet diameter plus one-sixteenth inch, each of said first pair of beads extending forwardly of the rivet center between about 40 percent and about 50 percent of the rivet diameter, and rearwardly thereof between about 73 percent and about 83 percent of the rivet diameter.
7. The structure of claim 6, wherein the beads forming each of said Vee configurations are connected so as to be continuous.
UNITED STATES PATENT AND TRADEMARK OFFICE CERTIFICATE OF CORRECTION q PATENT NO. I 3,858,753
DATED January 7, 1975 |NV ENTOR(S) Donald Roger Brautigam It is certified that error appears in the above-identified patent and that said Letters Patent q are hereby corrected as shown below:
The description of Figure 4 in Column 1 should read Q FIG. 4 is a view similar to FIG. 3 showing a modification; and
Signed and Scaled this T mmy-third D y Of November 19% w [SEALI' Arrest:
# RUTH C. MASON C. MARSHALL DANN Arresting Officer Commissioner uflatenrs and Trademarks

Claims (7)

1. In an easy-open metal can end having an integral rivet, a pull tab secured to said panel by means of said rivet, said panel being defined by a score line having a relatively High residual; a first pair of beads disposed equidistantly, one on each side of said rivet, substantially parallel to each other and to a diameter of said can passing through said rivet, and a second pair of beads generally parallel to the periphery of said can end, one of said second pair of beads being associated with each of said first pair of beads in a Vee configuration with the apex of said Vee configuration pointing toward the periphery of the can end.
2. The structure of claim 1, wherein the distance between said first pair of beads is equal to about the rivet diameter plus one-sixteenth inch.
3. The structure of claim 1, wherein each of said first pair of beads extends forwardly of the rivet center between about forty percent and about fifty percent of the rivet diameter.
4. The structure of claim 1, wherein each of said first pair of rivets extends rearwardly of the rivet center between about seventy-three percent and about eighty-three percent of the rivet diameter.
5. The structure of claim 1, wherein the beads forming each of said Vee configurations are connected so as to be continuous.
6. The structure of claim 1, wherein the distance between said first pair of beads is equal to about the rivet diameter plus one-sixteenth inch, each of said first pair of beads extending forwardly of the rivet center between about 40 percent and about 50 percent of the rivet diameter, and rearwardly thereof between about 73 percent and about 83 percent of the rivet diameter.
7. The structure of claim 6, wherein the beads forming each of said Vee configurations are connected so as to be continuous.
US379095A 1972-04-06 1973-07-13 Easy-open can end Expired - Lifetime US3858753A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
US379095A US3858753A (en) 1972-04-06 1973-07-13 Easy-open can end
AR253474A AR203199A1 (en) 1973-07-13 1974-04-25 EASY OPENING METAL TIN END
BE143577A BE814151R (en) 1973-07-13 1974-04-25 EASY OPENING BOX ENDS
DE2420082A DE2420082A1 (en) 1973-07-13 1974-04-25 EASY TO OPEN END OF A METAL CAN
AU68537/74A AU486142B2 (en) 1973-07-13 1974-05-02 Easy-open can end
GB2024874A GB1426308A (en) 1973-07-13 1974-05-08 Easy-open can end
FR7416508A FR2236740B1 (en) 1973-07-13 1974-05-13
JP49054641A JPS5834337B2 (en) 1973-07-13 1974-05-17 Kaihoyouikan no Tanpan
FI1603/74A FI55475C (en) 1973-07-13 1974-05-24 LAETTOEPPNAT METALLBURKAENDE
BR4503/74A BR7404503A (en) 1973-07-13 1974-05-31 EASY OPENING COVER FOR METAL CANS
IT51386/74A IT1046313B (en) 1973-07-13 1974-06-04 TEAR OPENING DEVICE FOR TINS AND SIMILAR
NLAANVRAGE7407960,A NL180401C (en) 1973-07-13 1974-06-14 EASY TO OPEN METAL HOLDER END WALL.
CH848574A CH578975A5 (en) 1973-07-13 1974-06-20
SE7409014A SE7409014L (en) 1973-07-13 1974-07-09 CAN END WITH FACILITATED OPENING.
DK372874A DK372874A (en) 1973-07-13 1974-07-11
CA204,671A CA969116A (en) 1973-07-13 1974-07-12 Easy-open can end

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24153572A 1972-04-06 1972-04-06
US379095A US3858753A (en) 1972-04-06 1973-07-13 Easy-open can end

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4687116A (en) * 1986-09-10 1987-08-18 Sun Coast Plastics, Inc. Easy open container end closure
US4915246A (en) * 1987-11-04 1990-04-10 501 Nippon Steel Corporation Non-vent type fully openable easy-opening end
US4930658A (en) * 1989-02-07 1990-06-05 The Stolle Corporation Easy open can end and method of manufacture thereof
EP2684808A1 (en) * 2012-07-09 2014-01-15 Ardagh MP Group Netherlands B.V. Closure for a container and a container provided therewith
EP3028952A1 (en) * 2014-12-01 2016-06-08 Ardagh MP Group Netherlands B.V. Closure for a container and a container provided therewith
USD840816S1 (en) 2017-07-13 2019-02-19 Ardagh Mp Group Netherlands B.V. Lid
USD889978S1 (en) 2018-06-14 2020-07-14 Ardagh Mp Group Netherlands B.V. Can panel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591037A (en) * 1969-02-24 1971-07-06 Aluminum Co Of America Container with removable panel portion
US3662916A (en) * 1970-11-23 1972-05-16 Continental Can Co Easy opening container

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591037A (en) * 1969-02-24 1971-07-06 Aluminum Co Of America Container with removable panel portion
US3662916A (en) * 1970-11-23 1972-05-16 Continental Can Co Easy opening container

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4687116A (en) * 1986-09-10 1987-08-18 Sun Coast Plastics, Inc. Easy open container end closure
US4915246A (en) * 1987-11-04 1990-04-10 501 Nippon Steel Corporation Non-vent type fully openable easy-opening end
US4930658A (en) * 1989-02-07 1990-06-05 The Stolle Corporation Easy open can end and method of manufacture thereof
EP2684808A1 (en) * 2012-07-09 2014-01-15 Ardagh MP Group Netherlands B.V. Closure for a container and a container provided therewith
WO2014009195A1 (en) * 2012-07-09 2014-01-16 Ardagh Mp Group Netherlands B.V. Closure for a container and a container provided therewith
EP3028952A1 (en) * 2014-12-01 2016-06-08 Ardagh MP Group Netherlands B.V. Closure for a container and a container provided therewith
WO2016087268A1 (en) * 2014-12-01 2016-06-09 Ardagh Mp Group Netherlands B.V. Closure for a container and a container provided therewith
US10618685B2 (en) 2014-12-01 2020-04-14 Ardagh Mp Group Netherlands B.V. Closure for a container and a container provided therewith
EA035670B1 (en) * 2014-12-01 2020-07-23 Ардаг Мп Груп Недерландс Б.В. Closure for a container and a container provided therewith
USD840816S1 (en) 2017-07-13 2019-02-19 Ardagh Mp Group Netherlands B.V. Lid
USD889978S1 (en) 2018-06-14 2020-07-14 Ardagh Mp Group Netherlands B.V. Can panel

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