US3329303A - Can top with opening means attached - Google Patents

Can top with opening means attached Download PDF

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US3329303A
US3329303A US444560A US44456065A US3329303A US 3329303 A US3329303 A US 3329303A US 444560 A US444560 A US 444560A US 44456065 A US44456065 A US 44456065A US 3329303 A US3329303 A US 3329303A
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metal
scored
pull ring
section
ring
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US444560A
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Fred B Dudek
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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
    • B65D17/4012—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 partially by means of a tearing tab

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  • This invention relates to a pull-top-type of can in which a key-hole shaped section is lifted out of the top of the can by means of a finger ring that is shaped with two depending shoulders that bear down on the can top and simultaneously lift a scored key-hole section out of the top of the can.
  • This invention has for its object to pull a piece of the top of a can off the top and leave an edge around the opening provided that will not cut or injure the user, who may pour the contents of the can out into a receptacle or drink directly from the can by placing his lips around the opening in the top of the can.
  • pull-top-cans These types of can have become known as pull-top-cans.
  • a pull ring large enough to permit the insertion of a finger that can be attached to the top of the can is a very common means used on beverage cans.
  • the soldering or welding of the piece of metal is on the portion of the can top within the scored lines so that only that portion of the metal can top is pulled off the can.
  • FIG. 1 is a perspective view of the upper portion of a pull-top beverage can.
  • FIG. 2 is an enlarged, sectional view through the top the can along line 22 of FIG. 1.
  • FIG. 3 is a plan view of the top of the can with the pull ring and the wafer disk for holding the pull ring removed.
  • FIG. 4 is a plan view of the wafer disk shown in FIG. 2 for fastening the pull ring to the can top.
  • FIG. 5 is a plan view of the top of a pull-top beverage can showing a practical modification of the attachment of a pull ring to the scored section of a can top for purposes of pulling off the scored section of the can top.
  • FIG. 6 is an enlarged, sectional view showing a pull ring between two beads of metal worked up from metal of can top before the beads are bent over to fasten said pull ring.
  • FIG. 7 is an enlarged, sectional view like FIG. 6 but showing the two heads of metal bent around the straight section of the pull ring.
  • the outside of the beverage can is represented by numeral 10 in FIG. 1 and the top is 11.
  • the part of the top 11 of the can 10 which is to be pulled off is the irregular shape 12 that has been outlined on the top 11 by a scoring process.
  • the pull ring 13 is shown lying flat on the top of the can and fastened thereto by a humped-up wafer disk 14.
  • a straight section of the pull ring passes under the humped-up portion of the disk 14.
  • This construction is better-shown in FIG. 2.
  • the wafer disk 14 is shown tack welded to the top of the can on both sides of the center sectional view 15 of pull ring 13.
  • the flat sections of disk 14 are tack-welded at 18 to the can top 11 on each side of the central hump 19.
  • FIG. 3 the score lines of the irregularly-shaped portion 12 of can top 11 that is to be pulled off is clearly shown. There are also shown two dimples 20 in the can top 11 where the shoulders 21 of the .pull ring 13 slide so as to locate a fulcrum for the pull ring to lift irregular shape 12 out of the can top 11 along the indicated score lines of portion 12.
  • the top view of the wafer disk shows the humped-up portion 19 that overlaps the straight section 15 of the pull ring 13, and the fiat sides 14 of the disk.
  • the disk 14 is tack welded to the top 11 of the beverage can is illustrated by weld bumps 18 on each side of the hump 19 to ease welding.
  • FIG. 5 is a plan View of another beverage can top 22 made out of cold pressure weldable metal that has a scored tear-off portion 23.
  • By well known methods of metal working the metal dis-placed by said scored concentric circles 24 is worked up into two parallel beads 25 shown in FIG. 6 with the straight section of pull ring 26 between said beads.
  • These parallel beads 25 are curled over ring 26 as shown in FIG. 7 to hold the ring fast to the can top 22 but allowing said ring to swivel under said curled beads 25.
  • Lifting ring 26 with a finger hold tears portion 23 off of can top 22 exposing a pouring opening the shape of 23.
  • a special feature of the pull ring of this invention is the formation of the ring with a pair of shoulders 21, one on each side of the straight section 15 of the ring 13 in FIG. 1.
  • the shoulders 21 dip down in hollowed-out dimples 20 of FIG. 3. This motion causes the shoulders to push down into dimples 20 and simultaneously push upward on section 19 of the wafer disc 14 in FIG. 2 so as to tear up scored section 12 out of can top 11.
  • a new can top of metal that is preformed in a circle with a series of concentric circles scored around the center point of said circle, a key-hole shaped section also scored on said can top having its eye-section concentric with said center point, all of said scored metal being pressure '4 molded into two parallel beads, one on each side of said center point, a pull ring having a short, straight section to lie across said concentric circles, and said parallel beads being wrapped over said straight section of said pull ring.
  • a new metal can top as claimed in claim 2 and said pull ring having an acutely-curved section on each side of said straight section.
  • a new metal can top as claimed in claim 2 and said pull ring having a circular curved section opposite said straight section and an acutely-curved section on each side of said straight section, which acutely-curved section of said pull ring bear-s down on said can top when said circularcurved section of said pull ring is lifted, thus lifting up said key-hole shaped section of said can top.

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

Description

July 4, 1967 F. B. DUDEK 3,329,303
CAN TOP WITH OPENING MEANS ATTACHED Filed April 1, 1965 21 i8 i5 .19 jg J8 J3 United States Patent 3,329,303 CAN TOP WITH OPENING MEANS ATTACHED Fred B. Dudek, 6723 N. Edgebrook Ave., Chicago, Ill. Filed Apr. 1, 1965, Ser. No. 444,560 4 Claims. (Cl. 220-54) The invention relates to new and useful improvements in opening cans with the means attached to the can.
This invention relates to a pull-top-type of can in which a key-hole shaped section is lifted out of the top of the can by means of a finger ring that is shaped with two depending shoulders that bear down on the can top and simultaneously lift a scored key-hole section out of the top of the can.
It is an object of the invention to specially prepare the top of the can and have attached to the top of the can the means to open a hole through the top of the can.
Today, all kinds and shapes of containers are used to package foods, oils, liquids, etc. Many of the containers have means attached to them for use in opening the containers. And many containers for beverages are equipped with means for tearing or opening a hole in the top from which the user can pour out his beverage or drink directly from the hole he opened in the top of the container.
This invention has for its object to pull a piece of the top of a can off the top and leave an edge around the opening provided that will not cut or injure the user, who may pour the contents of the can out into a receptacle or drink directly from the can by placing his lips around the opening in the top of the can. These types of can have become known as pull-top-cans.
The widespread use of .pull-top-cans has increased greatly since the development of cans not made of steel. Beverage cans particularly have been made from cold pressure weldable metals, such as aluminum and copper. When the top of the can is first scored to outline the size and shape of the pouring opening the pulling of the scored piece of metal out of the can top becomes relatively easy. The metal inside the score lines can be pulled up or back easily and leave smooth edges around the pouring opening which would not scratch or cut the lips of one who may elect to drink directly from the can rather than to pour the contents of the can into another receptacle.
It is another object of this invention to provide a means for lifting, tearing or pulling the metal within the scored lines on the top of the can up and out of the top leaving a clean edge around the pouring opening and not a jagged or rough edge. A pull ring large enough to permit the insertion of a finger that can be attached to the top of the can is a very common means used on beverage cans.
It is a feature of this invention to work the cold pressure weldable metal of a can top up into two beads that can bent over the straight section of a pull ring and secure the ring to the can top. I
It is also a feature of this invention to spot weld or solder a piece of metal over and around the straight section of a pull ring but securely to the can top on both sides of the straight section of the pull ring. The soldering or welding of the piece of metal is on the portion of the can top within the scored lines so that only that portion of the metal can top is pulled off the can.
These and other objects and features of this invention will be more readily understood from a detailed description of a pull-top-can as illustrated in the accompanying drawings showing a preferred embodiment of this invention and a practical modification.
FIG. 1 is a perspective view of the upper portion of a pull-top beverage can.
FIG. 2 is an enlarged, sectional view through the top the can along line 22 of FIG. 1.
3,329,303 Patented July 4, 1967 "ice FIG. 3 is a plan view of the top of the can with the pull ring and the wafer disk for holding the pull ring removed.
FIG. 4 is a plan view of the wafer disk shown in FIG. 2 for fastening the pull ring to the can top.
FIG. 5 is a plan view of the top of a pull-top beverage can showing a practical modification of the attachment of a pull ring to the scored section of a can top for purposes of pulling off the scored section of the can top.
FIG. 6 is an enlarged, sectional view showing a pull ring between two beads of metal worked up from metal of can top before the beads are bent over to fasten said pull ring.
FIG. 7 is an enlarged, sectional view like FIG. 6 but showing the two heads of metal bent around the straight section of the pull ring.
The outside of the beverage can is represented by numeral 10 in FIG. 1 and the top is 11. The part of the top 11 of the can 10 which is to be pulled off is the irregular shape 12 that has been outlined on the top 11 by a scoring process.
The pull ring 13 is shown lying flat on the top of the can and fastened thereto by a humped-up wafer disk 14. A straight section of the pull ring passes under the humped-up portion of the disk 14. This construction is better-shown in FIG. 2. The wafer disk 14 is shown tack welded to the top of the can on both sides of the center sectional view 15 of pull ring 13. There is a shallow annular flange '16 around the circumference of disk 14 that sets into a slightly-indented circle 17 in the can top 11. The flat sections of disk 14 are tack-welded at 18 to the can top 11 on each side of the central hump 19.
In FIG. 3 the score lines of the irregularly-shaped portion 12 of can top 11 that is to be pulled off is clearly shown. There are also shown two dimples 20 in the can top 11 where the shoulders 21 of the .pull ring 13 slide so as to locate a fulcrum for the pull ring to lift irregular shape 12 out of the can top 11 along the indicated score lines of portion 12.
In FIG. 4 the top view of the wafer disk shows the humped-up portion 19 that overlaps the straight section 15 of the pull ring 13, and the fiat sides 14 of the disk. Where the disk 14 is tack welded to the top 11 of the beverage can is illustrated by weld bumps 18 on each side of the hump 19 to ease welding.
A modification of this invention is shown in FIG. 5 which is a plan View of another beverage can top 22 made out of cold pressure weldable metal that has a scored tear-off portion 23. Around the central point of the can top 22 there are shown three concentric circles 24. By well known methods of metal working the metal dis-placed by said scored concentric circles 24 is worked up into two parallel beads 25 shown in FIG. 6 with the straight section of pull ring 26 between said beads. These parallel beads 25 are curled over ring 26 as shown in FIG. 7 to hold the ring fast to the can top 22 but allowing said ring to swivel under said curled beads 25. Lifting ring 26 with a finger hold tears portion 23 off of can top 22 exposing a pouring opening the shape of 23.
A special feature of the pull ring of this invention is the formation of the ring with a pair of shoulders 21, one on each side of the straight section 15 of the ring 13 in FIG. 1. When the ring 13 is lifted the shoulders 21 dip down in hollowed-out dimples 20 of FIG. 3. This motion causes the shoulders to push down into dimples 20 and simultaneously push upward on section 19 of the wafer disc 14 in FIG. 2 so as to tear up scored section 12 out of can top 11.
3 ders 27 dip down into dimples 20 shown in FIG. 3 but not shown in FIG. 5. This motion causes the shoulders to press down into the dimples and simultaneously to push upward on curled-over beads 25 in FIG. 7 so as to tear up the scored portion 23 from out of the can top 22.
The invention has been described with reference to specific illustrative devices. However, it should be evident that variations and modifications, as well as the substitution of equivalent elements for those shown and described herein for illustration, may be made without departing from the broader scope and spirit of the invention as set forth in the appended claims.
I claim as invention:
1. A new can top of metal preformed in a circle with a series of concentric circles scored around the center point of said circle, a key-hole shaped section also scored on said can top having its eye-section concentric with said center point, and all of said scored metal being pressure molded into twoparallel beads that are bent over a straight section of a pull ring to lift off said key-hole 20 shaped section from said metal can top.
2. A new can top of metal that is preformed in a circle with a series of concentric circles scored around the center point of said circle, a key-hole shaped section also scored on said can top having its eye-section concentric with said center point, all of said scored metal being pressure '4 molded into two parallel beads, one on each side of said center point, a pull ring having a short, straight section to lie across said concentric circles, and said parallel beads being wrapped over said straight section of said pull ring.
3. A new metal can top as claimed in claim 2 and said pull ring having an acutely-curved section on each side of said straight section.
4. A new metal can top as claimed in claim 2 and said pull ring having a circular curved section opposite said straight section and an acutely-curved section on each side of said straight section, which acutely-curved section of said pull ring bear-s down on said can top when said circularcurved section of said pull ring is lifted, thus lifting up said key-hole shaped section of said can top.
References Cited UNITED STATES PATENTS 3,225,957 12/1965 Huth 220-54 3,250,426 5/ 1966 Fraze 22054 FOREIGN PATENTS 482,838 4/1938 Great Britain.
THERON E. CONDON, Primary Examiner.
G. T. HALL, Assistant Examiner.

Claims (1)

1. A NEW CAN TOP OF METAL PREFORMED IN A CIRCLE WITH A SERIES OF CONCENTRIC CIRCLES SCORED AROUND THE CENTER POINT OF SAID CIRCLE, A KEY-HOLE SHAPED SECTION ALSO SCORED ON SAID CAN TOP HAVING ITS EYE-SECTION CONCENTRIC WITH SAID CENTER POINT, AND ALL OF SAID SCORED METAL BEING PRESSURE MOLDED INTO TWO PARALLEL BEADS THAT ARE BENT OVER A STRAIGHT SECTION OF A PULL RING TO LIFT OFF SAID KEY-HOLE SHAPED SECTION FROM SAID METAL CAN TOP.
US444560A 1965-04-01 1965-04-01 Can top with opening means attached Expired - Lifetime US3329303A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643832A (en) * 1970-08-06 1972-02-22 Continental Can Co Pull tab arrangement for easy-opening container

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB482838A (en) * 1936-10-12 1938-04-06 Seth Fortune Improvements in or relating to containers such as cans, cartons and the like
US3225957A (en) * 1963-09-20 1965-12-28 American Can Co Metal end closure
US3250426A (en) * 1964-02-24 1966-05-10 Ermal C Fraze Pre-puncturing tab

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB482838A (en) * 1936-10-12 1938-04-06 Seth Fortune Improvements in or relating to containers such as cans, cartons and the like
US3225957A (en) * 1963-09-20 1965-12-28 American Can Co Metal end closure
US3250426A (en) * 1964-02-24 1966-05-10 Ermal C Fraze Pre-puncturing tab

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643832A (en) * 1970-08-06 1972-02-22 Continental Can Co Pull tab arrangement for easy-opening container

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