U.S. patent number 3,813,000 [Application Number 05/246,820] was granted by the patent office on 1974-05-28 for can end construction.
Invention is credited to Ralph E. Underwood.
United States Patent |
3,813,000 |
Underwood |
May 28, 1974 |
CAN END CONSTRUCTION
Abstract
A can end has a weakened tear strip therein with a plastic
retainer affixed thereto. The retainer is swingably affixed to the
center of the can and is likewise permanently attached to a pull
ring tear strip opener. When the pull ring opener is operated to
remove the tear strip from the can end, both the tear strip and the
pull ring remain attached to the plastic retainer and are swingable
out of the way of the opened can end but are retained on the can
end in said out-of-the-way location.
Inventors: |
Underwood; Ralph E. (Miami,
FL) |
Family
ID: |
22932361 |
Appl.
No.: |
05/246,820 |
Filed: |
April 24, 1972 |
Current U.S.
Class: |
220/269;
222/541.9 |
Current CPC
Class: |
B65D
17/4012 (20180101) |
Current International
Class: |
B65d 017/24 () |
Field of
Search: |
;220/54,27,48
;222/541 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Hall; George T.
Attorney, Agent or Firm: Lowe, Kikjer, Kircher
Claims
Having thus described my invention, I claim:
1. A can end comprising a surface having a weakened area defining a
severable tear strip therein,
means attached to said tear strip for facilitating the effective
removal of said tear strip from said can end surface, the use of
which results in the exposure of an unobstructed orifice, and
means for retaining and moving said tear strip after said opening
is formed in said can end surface,
the retaining and moving means including a flexible material, said
flexible material being attached to said tear strip area and to
said tear strip removal means on the outer surface of said can end,
and means for attaching said flexible material to said can end
surface, said last mentioned means operable to retain said flexible
material, said tear strip area and said tear strip removal means on
said can end surface area in a plane generally parallel thereto
after said opening has been formed in said can end surface.
2. The combination as in claim 1 wherein said tear strip removing
means includes a pull ring, means for attaching said pull ring to
said tear strip area, said pull ring operable to effect the
piercing of said can end surface adjacent portion of said tear
strip and the removal of said tear strip area from said can end
surface.
3. The combination as in claim 2 wherein said means for attaching
said flexible material to said can end includes a rivet, said rivet
being located in the approximate center of said can end surface,
said rivet extending through said tear strip and said can end
surface and operable to swingably affix said flexible material to
said can end surface.
4. A combination as in claim 3 wherein said can end includes a
second rivet, said second rivet interconnecting said tear strip,
said flexible material, and said pull ring, said second rivet and
said flexible material thereby cooperating with said first rivet to
retain said tear strip and said pull ring on said can end surface
after said opening has been formed.
5. The combination as in claim 4 including means for releasably
maintaining said pull ring adjacent said flexible material.
6. The combination as in claim 1 wherein said tear strip removing
means includes a pull ring, means for attaching said pull ring to
said tear strip area, said pull ring operable to effect the
piercing of said can end surface adjacent portion of said tear
strip and the removal of said tear strip area from said can end
surface and means for releasably maintaining said pull ring
adjacent said flexible material.
Description
BACKGROUND AND BRIEF DESCRIPTION OF THE INVENTION
Beverage cans commonly contain a weakened tear strip area with a
pull ring opener attached thereto. The common operation is for a
user intending to drink or otherwise empty the contents from the
can to grasp the pull ring by the thumb and forefinger and
manipulate same in such a manner so as to remove the tear strip
along the scored or weakened lines in the can end. Ordinarily, the
user then throws away or otherwise discards the combined elements
which include the pull ring and tear strip.
Since the edges of the tear strip are sharp, the tear strip and
pull ring combination present a considerable hazard when carelessly
discarded on campsites, playgrounds and public accommodations
including picnic areas and the like. Also, the unsightliness of the
pull ring and tear strip components when removed from the can end
generally disfigure and can substantially reduce the aesthetic
appearance of many indoor and outdoor public accommodations. The
damage done to wildlife in and around lakes and streams by the
sharp tear strip-pull ring combination is as readily apparent as is
the obvious need to ecologically clean up the total environment.
Since the beverage cans may be re-cycled and are more easily
disposed of than the tear strip elements, the subject invention
relates to a can end construction which will eliminate the separate
discarding of the pull ring and tear strip from the can itself.
The invention relates to a can having a weakened tear strip therein
with a plastic retainer affixed thereto. The retainer is swingably
affixed to the center of the can and is likewise permanently
attached to a pull ring tear strip opener. When the pull ring
opener is operated to remove the tear strip from the can end, both
the tear strip and the pull ring remain attached to the plastic
retainer and are swingable out of the way of the opened can end but
are retained on the can end in said out-of-the-way location.
An object of the invention is to provide a uniquely constructed can
end that permits retention of the can end opening elements in an
out-of-the-way location after said can end has been opened for the
purpose of emptying the contents therefrom.
Another object of the invention is to provide a can end
construction of the character described that reduces any tendency
to litter by the discarding of the tear strip-pull ring can end
opening elements. It is a feature of the object that a substantial
amount of potentially ecologically harmful litter is permanently
attached to the more easily and often disposed of can type
container thereby forestalling the usual human tendency to
carelessly throw away the tear strip-pull ring combination of a
beverage can.
A further object of the invention is to provide a can end having a
uniquely constructed means for opening same which will include a
swingably mounted plastic retainer having both the tear strip and a
pull ring tab attached thereto. It is a feature of the invention
that the tear strip and pull ring are attached to the can end and
may be swung to an unobtrusive and out-of-the-way place while the
beverage in the can is either consumed directly therefrom or poured
to another receptacle. In this manner, the entire empty can
including tear strip-pull ring are simultaneously disposed of.
Another object of the invention is to provide a unique can end
construction which is inexpensive to manufacture and which is
simple to open yet operable in a manner to retain the components
heretofore disposed of in a separate fashion from the can
itself.
Other and further objects of the invention, together with the
features of novelty appurtenant thereto, will appear in the course
of the following description.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a top plan view of an unopened can end having the
tear-strip, plastic retainer and pull ring combination thereon;
FIG. 2 is a view similar to FIG. 1, however the above combination
in the can end opened position; and
FIG. 3 is a section view taken generally along the line 3--3 of
FIG. 1 in the direction of the arrows.
Turning now more particularly to the drawings, reference numeral 10
generally represents a can utilizing subject invention. The upper
end portion of the can will usually include the rim or flange
extremity 11 and will generally circumscribe the can end 12. In any
event, can 10 is of the conventional type which usually contains
beer or carbonated soda drinks.
The central portion of the upper can end 12 has rivet 13 located
therein. As shown in FIGS. 1 and 2, the can end portion 12 is
weakened along the lines indicated by the numeral 14 so as to
define a tear strip area (14a) which opens the can end 12 when
removed for dispensing purposes.
A plastic strip 15 will be bonded or otherwise affixed to the tear
strip 14a and will be attached to the can end 12 by a rivet-like
structure 13. This plastic strip may be thought of as a tear strip
retainer and will be of sufficient size to substantially overlie
the entire tear strip area in that it will extend past the outer
end extremity (nearest the can rim 11 as shown in FIG. 2) of the
weakened opening defining lines 14. In this manner, the potentially
sharp edges of the tear strip are protected when the can end is
opened as will be described.
A pull ring or tab is generally indicated by the numeral 16 and is
shaped somewhat in the form of a figure 8. The open part of the
ring is identified by the numeral 16a and will occupy the solid
line position shown in FIG. 1 when the can is in its unopened
state. The end (16b) opposite the ring end will be riveted to the
combined can end and plastic strip, 14a and 15 respectively, by the
rivet-like structure 17 which extends through the center of the
closed portion 16b.
As can be seen in the various views, the closed or riveted end
portion 16b of the pull tab 16 has a horseshoe shaped opening 18
defined therein which almost circumscribes the upper end portion of
rivet 17. A suitable notch or dimple (not shown) will be defined in
the pull tab portion 16b adjacent the upper (as shown in FIG. 1)
periphery of the rivet 17 and will accommodate the raised
projection 19 therein to locate the pull tab structure 16 for
proper operation with respect to the tear strip and the can end.
Since ring or tab 16 may swivel about the rivet 17 the projection
19 will properly and easily orient the pull tab with respect to the
weakened lines 14 thereby assuring that the tear strip resistance
to shear is minimized when it is desirable to open the can.
In addition to the projection and dimple combination (19) the
plastic strip or retainer 15 may be provided with clips 20 on
either side of a vertical line through the diameter of the ring end
16a of the pull tab 16 (as seen in FIGS. 1 and 2). These clips will
operate to resiliently engage the pull ring end and further
maintain the tab in the properly oriented position as well as
providing a means for re-locating the pull tab once the can end has
been opened. As shown in FIG. 3, the retainer clips are comprised
of two upright resilient plastic projections which have a space
defined between each pair of plastic projections. When it is
desired to position the pull ring end 16a with respect to the
retainer strip 15, the ring end 16a is merely forced down on the
can end so that the upright plastic clip projections separate and
resiliently engage the ring to retain same in close proximity to
the can end.
As will be seen, a recessed area 21 is located diametrically
opposite the tear strip 14a for purposes of locating the combined
tear strip, plastic retainer and pull tab when the can end is
opened.
In operation, an unopened can is substantially that shown in FIGS.
1 and 3 with the pull tab 16 being properly oriented with respect
to the weakened can end lines 14a defining the tear strip area.
When it is desired to open the can end, the pull ring 16a of the
tab 16 is easily engaged by the thumb and forefinger of the user
and is lifted upwardly thereby forcing the pull tab end portion,
identified by the numeral 16c, downwardly and effecting a can end
pierce at the near rim extremity of the weakened lines of 14.
Stated another way, since the rivet 17 fixedly locates the piercing
end 16b of the pull tab and since the substantially horseshoe
shaped opening or slot 18 ends near the piercing end 16c, the
upward movement of the ring end 16a fulcrums the pull tab 16 about
the rivet structure and forces the piercing end 16c to rupture or
pierce the can end as described. Once the piercing has been
accomplished, the ring 16a is easily pulled in a direction to
complete the tearing of the tear strip from the can end and the
accomplishment of the can opening.
With the above described operation, it is clear that the tear
strip, the plastic retainer, and the pull tab are still retained on
the can end by the presence of rivet 13. Since the rivet 13 locates
the plastic retainer strip 15 for pivotal movement on the can end,
it is a simple matter to rotate the pull ring 16a until the
combined attached components are in the solid line position shown
in FIG. 2 within the recessed area 21. At this time, if the clips
20 have been provided, the pull ring end 16a may be forced
downwardly to once again be engaged within the clips. The tear
strip, retainer strip, and pull tab are maintained on the can end
in an unobtrusive and clearly out-of-the-way position so that an
individual may drink directly from the can or pour the contents
into glasses etc. without in any way encumbering either
operation.
From the foregoing, it will be seen that this invention is one well
adapted to attain all of the ends and objects hereinabove set forth
together with other advantages which are obvious and which are
inherent to the structure.
It will be understood that certain features and subcombinations are
of utility and may be employed without reference to other features
and subcombinations.
As many possible embodiments may be made of the invention without
departing from the scope thereof, it is to be understood that all
matter herein set forth or shown in the accompanying drawing is to
be interpreted as illustrative and not in a limiting sense.
* * * * *