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US3208628A - Pull tab secured to tear strip by concentric rivet formation - Google Patents

Pull tab secured to tear strip by concentric rivet formation Download PDF

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Publication number
US3208628A
US3208628A US289015A US28901563A US3208628A US 3208628 A US3208628 A US 3208628A US 289015 A US289015 A US 289015A US 28901563 A US28901563 A US 28901563A US 3208628 A US3208628 A US 3208628A
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Prior art keywords
tear strip
pull tab
tear
panel
starting end
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Expired - Lifetime
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US289015A
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Henchert John
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Continental Can Co Inc
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Continental Can Co Inc
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Priority claimed from US88473A external-priority patent/US3151766A/en
Application filed by Continental Can Co Inc filed Critical Continental Can Co Inc
Priority to US289015A priority Critical patent/US3208628A/en
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    • 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

Definitions

  • This invention relates in general to new and useful improvements in means for opening containers, such as cans, and more particularly is directed to a novel tear strip arrangement for containers including metal can ends wherein a container may be opened by merely grasping a pull tab attached to a tear strip and removing the tear strip to thereby remove a panel of the container.
  • One of the primary objects of this invention is to provide a novel tear strip and pull tab combination wherein the pull tab is firmly anchored to one end of the tear strip and is of a greater width than the tear strip whereby the pull tab rests upon the associated container member on opposite sides of the tear strip to reinforce the tear strip at its starting end to eliminate the accidental rupture of the container member at the starting end of the tear strip.
  • Another object of the invention is to provide a novel connection between a tear strip and a pull tab therefor wherein the tear strip is in no way punctured and a good mechanical connection is obtained between the tear strip and the pull tab without the utilization of a welding process.
  • a further object of this invention is to provide a pull tab and tear strip connection wherein the pull tab is provided with a simple boss which is passed through an opening in a tear strip and the boss upset to both form an interlock between the tear strip and the pull tab and to seal the opening in the tear strip.
  • Another object of the invention is to provide a novel mechanical connection between a metal pull tab and a metal tear strip wherein the pull tab and tear strip are provided with interlocked bosses and with portions of the pull tab extending into the tear strip to thus provide the desired mechanical connection without rupturing or otherwise puncturing the tear strip.
  • This invention also proposes to provide means to facilitate the starting of the tearing of a tear strip from the adjacent metal whereby the tear strip is provided with a generally semi-circular end portion which is scored more deeply than side edge portions of the tear strip, whereby a lesser starting force is required to rupture the tear strip along the score lines.
  • FIGURE 1 is a perspective view of an upper portion of a can having a metal can end which is provided with a tear strip and pull tab in accordance with this invention.
  • FIGURE 2 is a perspective view similar to FIGURE 1 and shows the tear strip partially removed.
  • FIGURE 3 is an enlarged plan View of the upper end of the can of FIGURE 1 and shows further the details of the tear strip and pull tab.
  • FIGURE 4 is an enlarged fragmentary vertical sec- 3,208,628 Patented Sept. 28, 1965 tional view taken along the line 4--4 of FIGURE 3, and shows the specific details of the connection between the pull tab and the tear strip.
  • FIGURE 5 is an enlarged fragmentary transverse vertical sectional view taken along the line 5-5 of FIG- URE 3 and shows further the details of the connection between the pull tab and tear strip, including the fact that the pull tab overlies the metal can end on opposite sides of the tear strip to prevent the accidental rupturing of the can end along the outline of the tear strip by a downward pressure.
  • FIGURE 6 is a fragmentary plan view showing the general outline of the tear strip at the starting end thereof and the formation of the score lines defining the same.
  • FIGURE 7 is an enlarged fragmentary vertical sectional view taken along the line 77 of FIGURE 6, and shows the specific arrangement of the scores in the various portions of the metal can end along the outline of the tear strip.
  • FIGURES l, 2 and 3 wherein there is illustrated a conventional type of can which is generally referred to by the numeral 20, and which includes a can body 21 and a can end 22.
  • the can end 22 is preferably formed of a light gauge metal, and it is desirable that the metal be easily rupturable. As a result, normally the can end 22 will be formed of aluminum, although the usual metals employed in the making of the can ends may be utilized.
  • the can end 22 is secured to the can body 21 by a conventional seam 23.
  • the can 20 is illustrated and described only to set forth one environment of the invention. The present invention is not restricted to cans, but may be used in all types of containers, etc., where it is desired to remove a portion thereof without utilizing any opening equipment, such as a can opener in the case of a can.
  • FIGURE 3 wherein the can end 22 is illustrated as having a circumferential tear strip 24 which is defined by a pair of score lines 25, 26 with the score line 25 being disposed outermost and being disposed adjacent the seam 23 so that when the tear strip 24 is removed, substantially the entire can end 22 within the seam 23 will be removed.
  • the score lines 25, 26 are disposed generally in concentric relation for the most part of their lengths and the score line 26 generally defines an inner panel 27.
  • a pull tab In order to facilitate the tearing and removal of the tear strip 24 from the can end 22, there is provided a pull tab, generally referred to by the numeral 28.
  • the pull tab 28 is relatively elongated and is of a greater width than the tear strip 24.
  • the peripheral edges of the pull tab 28 are reinforced by a narrow peripheral flange 29 which is bent over the upper surface of the pull tab 28, as is best shown in FIGURES 3, 4 and 5.
  • connection between the tear strip 24 and the pull tab 28 includes an integral boss 30 on the tear strip 24, which boss 30 projects downwardly into the interior of the can and leaves a closed opening 31 through the tear strip 24.
  • the pull tab 28 is provided with a similar boss 32 which is of a size to be snugly received within the boss 30.
  • bosses 30 and 32 are offset to have the relationship shown in FIGURES 4 and 5.
  • the offset bosses 30 and 32 now include a relatively large diameter bead on the boss 30 below the surface of the tear strip 24 and have a portion thereof snugly engaging in a manner wherein accidental rupture of the connection between the pull tab and tear strip is precluded, thus assuring the tearing of the tear strip from the can end 22 when it is desired to open the can 20.
  • the partial can end illustrated in FIGURE 6 will be considered to be the can end 22, and the tear strip, the tear strip 24.
  • the tear strip 24 is defined by a pair of score lines 25, 26. As is best illustrated in FIGURE 7, these score lines 25, 26 are relatively shallow.
  • the score lines 25 and 26 will preferably be of a depth so that the remaining metal to be torn in the removal of the tear strip 24 will have a thickness of 0.003 inch.
  • the ends of the score lines 25, 26 are connected together by a generally semi-circular score line 102 which has a greater base width and is of a greater depth, as is best illustrated in FIGURES 6 and 7.
  • the depth of the score line 102 will be such that in most instances, the remaining thickness of metal to be torn will range between 0.001 inch and 0.0015 inch.
  • a tear strip assembly comprising a panel, a tear strip defined in said panel by spaced weakening lines in said panel, said tear strip having a starting end, and a pull tab overlying and connected to said tear strip starting end for facilitating the removal of said tear strip, said pull tab being of a greater width than the underlying portion of said tear strip and resting on said panel outwardly of said tear strip to resist accidental rupturing of said panel by inwardly displacement of said tear strip starting end, said weakening lines including a weakening line extending around a terminal portion of said tear strip starting end, said last mentioned weakening line presenting a line of least resistance to tearing to facilitate the starting of the removal of said tear strip, said tear strip having an opening defined by an inwardly directed first boss with said tear strip being imperforate, said pull tab having a second boss extending into the tear strip opening and telescoped within said first boss, said weakening lines being in the form of score lines and said lastmentioned weakening line being of a greater depth than others of said weak
  • a tear strip assembly comprising a metal tear strip having a starting end, said starting end having an opening therein, a pull tab having an intermediate plug portion extending into said opening and engaged behind said tear strip to secure said pull tab to said tear strip, said tear strip opening being defined by a boss on said tear strip whereby said tear strip is imperforate, and said pull tab being formed of sheet metal with said plug portion also being in the form of a boss, said bosses being internested and interlocked by means of internested beads.
  • a tear strip assembly comprising a metal tear strip having a starting end, said starting end having an opening therein, a pull tab having an intermediate plug portion extending into said opening and engaged behind said tear strip to secure said pull tab to said tear strip, said tear strip opening being defined by a boss on said tear strip whereby said tear strip is imperforate, and said pull tab being formed of sheet metal with said plug portion also being in the form of a boss, said bosses being internested and interlocked by means of internested beads, said second boss having a flattened bead and said first boss having an open bead snugly receiving said flattened bead.

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

Description

Sept. 28, 1965 J. HENCHERT 3,208,628
PULL TAB SECURED TO TEAR STRIP BY CONCENTRIC RIVET FORMATION Original Filed Feb. 10, 1961 INVENTOR Jul-m HEucHEzT United States Patent ice 3,208,628 PULL TAB SECURED TO TEAR STRIP BY CONCENTRIC RIVET FORMATION John Henchert, Oak Park, Ill., assignor to Continental Can Company, Inc., New York, N.Y., a corporation of New York Original application Feb. 10, 1961, Ser. No. 88,473, now Patent No. 3,151,766, dated Oct. 6, 1964. Divided and this application June 19, 1963, Ser. No. 289,015 3 Claims. (Cl. 22054) This invention relates in general to new and useful improvements in means for opening containers, such as cans, and more particularly is directed to a novel tear strip arrangement for containers including metal can ends wherein a container may be opened by merely grasping a pull tab attached to a tear strip and removing the tear strip to thereby remove a panel of the container.
This application is a division of my copending application Serial No. 88,473, filed February 10, 1961, now Patent No. 3,151,766.
One of the primary objects of this invention is to provide a novel tear strip and pull tab combination wherein the pull tab is firmly anchored to one end of the tear strip and is of a greater width than the tear strip whereby the pull tab rests upon the associated container member on opposite sides of the tear strip to reinforce the tear strip at its starting end to eliminate the accidental rupture of the container member at the starting end of the tear strip.
Another object of the invention is to provide a novel connection between a tear strip and a pull tab therefor wherein the tear strip is in no way punctured and a good mechanical connection is obtained between the tear strip and the pull tab without the utilization of a welding process.
A further object of this invention is to provide a pull tab and tear strip connection wherein the pull tab is provided with a simple boss which is passed through an opening in a tear strip and the boss upset to both form an interlock between the tear strip and the pull tab and to seal the opening in the tear strip.
Another object of the invention is to provide a novel mechanical connection between a metal pull tab and a metal tear strip wherein the pull tab and tear strip are provided with interlocked bosses and with portions of the pull tab extending into the tear strip to thus provide the desired mechanical connection without rupturing or otherwise puncturing the tear strip.
This invention also proposes to provide means to facilitate the starting of the tearing of a tear strip from the adjacent metal whereby the tear strip is provided with a generally semi-circular end portion which is scored more deeply than side edge portions of the tear strip, whereby a lesser starting force is required to rupture the tear strip along the score lines.
With the above, and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to the following detailed description, the appended claims and the several views illustrated in the accompanying drawings.
In the drawings:
FIGURE 1 is a perspective view of an upper portion of a can having a metal can end which is provided with a tear strip and pull tab in accordance with this invention.
FIGURE 2 is a perspective view similar to FIGURE 1 and shows the tear strip partially removed.
FIGURE 3 is an enlarged plan View of the upper end of the can of FIGURE 1 and shows further the details of the tear strip and pull tab.
FIGURE 4 is an enlarged fragmentary vertical sec- 3,208,628 Patented Sept. 28, 1965 tional view taken along the line 4--4 of FIGURE 3, and shows the specific details of the connection between the pull tab and the tear strip.
FIGURE 5 is an enlarged fragmentary transverse vertical sectional view taken along the line 5-5 of FIG- URE 3 and shows further the details of the connection between the pull tab and tear strip, including the fact that the pull tab overlies the metal can end on opposite sides of the tear strip to prevent the accidental rupturing of the can end along the outline of the tear strip by a downward pressure.
FIGURE 6 is a fragmentary plan view showing the general outline of the tear strip at the starting end thereof and the formation of the score lines defining the same.
FIGURE 7 is an enlarged fragmentary vertical sectional view taken along the line 77 of FIGURE 6, and shows the specific arrangement of the scores in the various portions of the metal can end along the outline of the tear strip.
Reference is first made to FIGURES l, 2 and 3, wherein there is illustrated a conventional type of can which is generally referred to by the numeral 20, and which includes a can body 21 and a can end 22. The can end 22 is preferably formed of a light gauge metal, and it is desirable that the metal be easily rupturable. As a result, normally the can end 22 will be formed of aluminum, although the usual metals employed in the making of the can ends may be utilized. The can end 22 is secured to the can body 21 by a conventional seam 23. The can 20 is illustrated and described only to set forth one environment of the invention. The present invention is not restricted to cans, but may be used in all types of containers, etc., where it is desired to remove a portion thereof without utilizing any opening equipment, such as a can opener in the case of a can.
Reference is now made to FIGURE 3 in particular, wherein the can end 22 is illustrated as having a circumferential tear strip 24 which is defined by a pair of score lines 25, 26 with the score line 25 being disposed outermost and being disposed adjacent the seam 23 so that when the tear strip 24 is removed, substantially the entire can end 22 within the seam 23 will be removed. The score lines 25, 26 are disposed generally in concentric relation for the most part of their lengths and the score line 26 generally defines an inner panel 27.
In order to facilitate the tearing and removal of the tear strip 24 from the can end 22, there is provided a pull tab, generally referred to by the numeral 28. The pull tab 28 is relatively elongated and is of a greater width than the tear strip 24. The peripheral edges of the pull tab 28 are reinforced by a narrow peripheral flange 29 which is bent over the upper surface of the pull tab 28, as is best shown in FIGURES 3, 4 and 5.
It will be seen from FIGURES 4 and 5 that the connection between the tear strip 24 and the pull tab 28 includes an integral boss 30 on the tear strip 24, which boss 30 projects downwardly into the interior of the can and leaves a closed opening 31 through the tear strip 24. The pull tab 28 is provided with a similar boss 32 which is of a size to be snugly received within the boss 30.
After the pull tab 28 has been loosely assembled with the tear strip 24, the bosses 30 and 32 are offset to have the relationship shown in FIGURES 4 and 5. The offset bosses 30 and 32 now include a relatively large diameter bead on the boss 30 below the surface of the tear strip 24 and have a portion thereof snugly engaging in a manner wherein accidental rupture of the connection between the pull tab and tear strip is precluded, thus assuring the tearing of the tear strip from the can end 22 when it is desired to open the can 20.
The advantages of the pull tab and tear strip construction discosed herein will be obvious in that not only is the pull tab securely connected to the tear strip in a manner to assure the removal of the tear strip when desired, but also the connection has been accomplished in a simple mechanical metal working operation without forming any opening in the tear strip which will be susceptible to leakage.
Reference is now made to FIGURES 6 and 7, wherein the details of the score lines defining the various tear strips at the starting end of each tear strip, are shown. For identification purposes only, the partial can end illustrated in FIGURE 6 will be considered to be the can end 22, and the tear strip, the tear strip 24. As was previously described, the tear strip 24 is defined by a pair of score lines 25, 26. As is best illustrated in FIGURE 7, these score lines 25, 26 are relatively shallow. The score lines 25 and 26 will preferably be of a depth so that the remaining metal to be torn in the removal of the tear strip 24 will have a thickness of 0.003 inch. The ends of the score lines 25, 26 are connected together by a generally semi-circular score line 102 which has a greater base width and is of a greater depth, as is best illustrated in FIGURES 6 and 7. The depth of the score line 102 will be such that in most instances, the remaining thickness of metal to be torn will range between 0.001 inch and 0.0015 inch. By making the score line 102 much deeper than the score lines 25, 26, it will be readily apparent that a sharp upward pull on the starting end of the tear strip 24 by means of the pull tab 28 will result in the rupturing of the metal of the can end 22 along the score line 102. Once the initial rupturing has been accomplished, the tear strip 24 may be removed by continuously exerting an upward pull thereon with the tear strip 24 being torn from the can end 22 along the tear lines 25, 26.
The advantage of the relatively deep score line 102 coupled with the supporting feature of the individual pull tab is obvious. Applicant has made the initially torn portion of the can end of sufiicient weakness to facilitate the ease of tearing the starting end of the tear strip therefrom. On the other hand, by making each pull tab of a sufiicient width to engage the can end outwardly of the tear strip, the tear strip is prevented from deflecting inwardly due to any accidental force exerted thereon, whereby the can 20 would be opened prematurely.
From the foregoing, it will be seen that novel and advantageous provision has been made for carrying out the desired end. However, attention is again directed to the fact that variations may be made in the examples of the invention disclosed herein without departing from the spirit and scope of the invention, as defined in the appended claims.
I claim:
1. A tear strip assembly comprising a panel, a tear strip defined in said panel by spaced weakening lines in said panel, said tear strip having a starting end, and a pull tab overlying and connected to said tear strip starting end for facilitating the removal of said tear strip, said pull tab being of a greater width than the underlying portion of said tear strip and resting on said panel outwardly of said tear strip to resist accidental rupturing of said panel by inwardly displacement of said tear strip starting end, said weakening lines including a weakening line extending around a terminal portion of said tear strip starting end, said last mentioned weakening line presenting a line of least resistance to tearing to facilitate the starting of the removal of said tear strip, said tear strip having an opening defined by an inwardly directed first boss with said tear strip being imperforate, said pull tab having a second boss extending into the tear strip opening and telescoped within said first boss, said weakening lines being in the form of score lines and said lastmentioned weakening line being of a greater depth than others of said weakening lines.
2. A tear strip assembly comprising a metal tear strip having a starting end, said starting end having an opening therein, a pull tab having an intermediate plug portion extending into said opening and engaged behind said tear strip to secure said pull tab to said tear strip, said tear strip opening being defined by a boss on said tear strip whereby said tear strip is imperforate, and said pull tab being formed of sheet metal with said plug portion also being in the form of a boss, said bosses being internested and interlocked by means of internested beads.
3. A tear strip assembly comprising a metal tear strip having a starting end, said starting end having an opening therein, a pull tab having an intermediate plug portion extending into said opening and engaged behind said tear strip to secure said pull tab to said tear strip, said tear strip opening being defined by a boss on said tear strip whereby said tear strip is imperforate, and said pull tab being formed of sheet metal with said plug portion also being in the form of a boss, said bosses being internested and interlocked by means of internested beads, said second boss having a flattened bead and said first boss having an open bead snugly receiving said flattened bead.
References Cited by the Examiner UNITED STATES PATENTS 1,792,897 2/31 De Lacy 220-24 2,029,329 2/ 36 Ljungstrom et al 220-52 2,557,830 6/51 Lazarevich 215-46 2,963,197 12/60 Lyon 220-74 2,978,140 4/61 Walsh.
THERON E. CONDON, Primary Examiner.

Claims (1)

1. A TEAR STRIP ASSEMBLY COMPRISING A PANEL, A TEAR STRIP DEFINED IN SAID PANEL BY SPACED WEAKENING LINES IN SAID PANEL, SAID TEAR STRIP HAVING A STARTING END, AND A PULL TAB OVERLYING AND CONNECTED TO SAID TEAR STRIP STARTING END FOR FACILITATING THE REMOVAL OF SAID TEAR STRIP SAID PULL TAB BEING OF A GREATER WIDTH THAN THE UNDERLYING PORTION OF SAID TEAR STRIP AND RESTING ON SAID PANEL OUTWARDLY OF SAID TEAR STRIP TO RESIST ACCIDENTAL RUPTURING OF SAID PANEL BY INWARDLY DISPLACEMENT OF SAID TEAR STRIP STARTING END, SAID WEAKENING LINES INCLUDING A WEAKENING LINE EXTENDING AROUND A TERMINAL PORTION OF SAID TEAR
US289015A 1961-02-10 1963-06-19 Pull tab secured to tear strip by concentric rivet formation Expired - Lifetime US3208628A (en)

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US88473A US3151766A (en) 1961-02-10 1961-02-10 Pull tab tear strip combination for metal can end
US289015A US3208628A (en) 1961-02-10 1963-06-19 Pull tab secured to tear strip by concentric rivet formation

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090070894A1 (en) * 2005-12-01 2009-03-12 Cropdesign N.V. Plants having improved growth characteristics and methods for making the same
EP2160332A4 (en) * 2007-06-22 2011-08-10 Stolle Machinery Co Llc Can end and method of making same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792897A (en) * 1927-07-23 1931-02-17 William Vogel & Bros Inc Can-closure structure and process
US2029329A (en) * 1932-10-21 1936-02-04 Transitoria Ab Device for opening cans
US2557830A (en) * 1950-01-19 1951-06-19 George D Lazarevich Sealing cap releaser
US2963197A (en) * 1958-02-03 1960-12-06 Jr George A Lyon Tray and method of making same
US2978140A (en) * 1960-05-10 1961-04-04 United Shoe Machinery Corp Container opening devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792897A (en) * 1927-07-23 1931-02-17 William Vogel & Bros Inc Can-closure structure and process
US2029329A (en) * 1932-10-21 1936-02-04 Transitoria Ab Device for opening cans
US2557830A (en) * 1950-01-19 1951-06-19 George D Lazarevich Sealing cap releaser
US2963197A (en) * 1958-02-03 1960-12-06 Jr George A Lyon Tray and method of making same
US2978140A (en) * 1960-05-10 1961-04-04 United Shoe Machinery Corp Container opening devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090070894A1 (en) * 2005-12-01 2009-03-12 Cropdesign N.V. Plants having improved growth characteristics and methods for making the same
EP2160332A4 (en) * 2007-06-22 2011-08-10 Stolle Machinery Co Llc Can end and method of making same
US8109405B2 (en) 2007-06-22 2012-02-07 Stolle Machinery Company, Llc Can end and rivet base scoreline therefor

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