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Патент USA US3027644

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April 3, 1962
Filed Dec. 2, 1958
2 Sheets—-Sheet 1
WW5?5% mum“.
April 3, 1962
Filed Dec. 2, 1958
2 Sheets-Sheet 2
United States
Patented Apr. 3, 1962
perforated metal folded rearwardly against the side wall
of the can;
Edward P. Hansen, 2311 W. Capitol Drive, and William
H. Vollrrnan, 5526 W. Hopkins Sh, both of Milwau
kee, Wis.
Filed Dec. 2, 1958, Ser. No. 777,755
1 Claim. (Cl. ISO-6.3)
FIGURE 3 is a plan view of a container showing the
perforated holes therein as well as the formed pour
FIGURE 4 is a perspective view of the can perfora
tor in a partially closed position in order to show the
relationship of the vent and the pour opening spears
in the upper member with corresponding openings in the
This invention relates primarily to can perforators of
the type particularly adapted for perforating a metal con 10 lower member;
FIGURE 5 is a bottom view of the upper member show
tainer and simultaneously forming a pour lip thereon
ing the details of the various projecting parts there
whereby liquid within the container can be readily drained.
A general object of the invention is to provide an im
FIGURE 6 is a bottom view of the lower member show
proved can perforator.
Another object of the invention is to provide an im 15 ing the can engaging rim means and the can pry edge
proved can perforator particularly adaptable to the open
FIGURE 7 is an elevation of a portion of the device
ing of cans having a ?at top surface such as are found
with the bottle cap remover positioned to effect removal
in metal condensed milk containers.
of a conventional cap from a bottle; and
Another object of the invention is to provide an im
FIGURE 8 is also an elevational view of the bottle
proved can perforator whereby the piercing member is 20
cap remover disposed on the cover of a jar whereon the
designed to perforate a can top and bend the resulting
metal tongue in a manner to ?atten the same against
the interior wall of the can and to deform the rim of
the can to create a pour lip.
cover was pressure mounted.
Can perforators are in a class by themselves among the
miscellany of household devices presently available in
According to this invention, an improved can perfora~ 25 the modern kitchen. While many different perforators
have been developed, most are virtually useless since the
tor is provided which is particularly adaptable for per
average housewife is unable to use them with ease and
forating the top of flat faced cans and provide a pair of
assurance of success. As a consequence, many house
pierced openings therein; one of said openings being suf
wives resort to the age old technique of applying endwise
?ciently large to permit ready pouring of liquid from
the can, and the other opening serving to provide a vent 30 pressure on an ice pick or knife to force the point there
of through the cover of a container. Resorting to the
in the can. The can perforator is comprised of two
use of such means has often resulted in physical injuries or
main members which are hingedly secured together to
mental anguish to the user.
provide a unitary operating mechanism. The lower mem
In order to overcome the hazards and uncertainties of
ber is provided with a hook to engage the sidewall of the
can directly beneath the top rim thereof. The other or 35 using the existing devices allegedly designed for perforat
ing food and liquid containers, a new concept of a com
upper member is provided with a pour opening spear and
bined can perforator, cover and bottle cap opener is here
a vent opening spear. A slight downward pressure on
inafter described.
the upper member will serve to ?rst bring the pour open
Referring to the drawings, and more speci?cally to
ing spear into engagement with the top surface of the
can and effectively pierce the metal. Continued pres 40 FIGURE 1 thereof, the can perforator device 10 is shown
operatively positioned on the ?at top face 11 of a sealed
sure on the upper member will serve to fold the metal
can or container 12. The tool device 10 is comprised
from the pour opening downwardly and rearwardly until
such metal meets with the side wall of the can.
spear is shaped to deform the peripheral rim of the can
in a manner to create a pour lip thereon.
of two main members, a lower member 13 and an upper
member 14. Initially, the lower member '13 is manually
Concomitantly 45 disposed on the top of the container or receptacle 12.
the vent opening spear will have engaged the can top
A crosswise movement of the device 10 will serve to bring
surface diametrically opposite the pour lip opening to
a downwardly projecting and inwardly curved ?ange hook
to partially withstand deformation and, consequently,
the upper member 14. A hinge pin 19 extending through
15 into engagement with the underside of a peripheral
provide a smaller vent opening in the can top. The can
edge or bead '16 of the can 12; at this point further
perforator offers considerable utility to persons who are
required to open condensed milk cans and the like. The 50 movement of the member 13 is impossible.
As viewed in FIGURE 1, the left end of the member 13
can perforator can also be used to open cans having an
is formed to provide a hinge section 17 designed to ?t
upstanding edge such as beverage cans; in this case, how
between a pair of binge lobes 18 integrally formed on
ever, the upstanding can ridge or rim is su?iciently strong
a pouring lip of reduced size is formed on the rim of the 55 the hinge section 17 and lobes 18 serves to join the
members \13 and 14 together into an operable unit. The
can. The upper member of the can perforator is shaped
clearance between the hinge components is su?icient to
to provide a bottle cap removal means, while the lower
permit free movement therebetween with a minimum
member is swedged to provide a pry lever useful in open
of manual effort.
ing the conventional jam and paint type of container.
The foregoing and other objects of the invention will 60 The upper member 114 is shaped similar to the lower
member 13 excepting that the member 14 is provided with
become more apparent to one who has read the follow
depending longitudinal side edges 20 and 21. These in
ing detailed description and has studied the accompanying
tegrally formed edges serve to materially stiffen the mem
drawings, in which:
ber and strengthen the same against laterally applied pres
FIGURE 1 is a perspective view of a can perforator
65 sures.
operably disposed on top ,of a can;
A pour opening spear 22 and a vent opening spear 23
FIGURE 2 is a side view of the can perforator disposed
are integrally formed and depending from the bottom face
in a closed position on top of a can and showing the
24 of the member 14, as best viewed in FIGURES 2 and
5. The spear 23 is crowned to impart stability thereto
and to serve to enlarge the resulting hole in the can 12.
for this purpose without ‘fear of bending or twisting the
metal adjacent the edge 34. The same edge can be used
as screw driver and for other related purposes.
Use of the bottle cap remover 33 for removing a well
A punched opening Z25 in the lower member 13 permits
a ready passage for the spear 23 when the can perfora
known crimped bottle ‘cap 37 from a glass beverage bottle
tor device is manipulated to effect perforation of a con
tainer. A punched opening 26 in the member 13 pro
38 is depicted in FIGURE 7. The removal of the cap 37
is eifected by clasping the folded device 10 ?rmly in a
vides corresponding passage for the pour opening spear
22, as shown in FIGURES l, 4 and 6.
manner to bring an extending hook 39 of vthe cap remover
against the side wall of the can and e?ect a distortion of
the sidewall to create a pour trough 28. FIGURE 3
is a top view of a can or container 12 after the openings
The width of the ‘cap remover hook 39 is sufficient to sup
port the underside of the cap 37 over a considerable dis
33 into engagement with the underside of the cap and
The spear 22 is accurately shaped to pierce the top 10 with the members 13 and 14 extending across the top of
face 11 of a can 12 and fold the resulting fragment of
the cap. A slight downward pressure on the extending
metal constituting a triangular tongue 27 backwardly
end of the member 14 will lift the cap‘ ‘from the bottle.
have been cut therein with the numeral 29 indicating
the pour opening through which the contents of the can
may ‘be poured and the numeral 30‘ indicating the vent
opening. The latter is just large enough to adequately
tance whereby the usual bending and distortion of the cap
is eliminated; thus the cap ‘can be readily reused.
Likewise, the use of the bottle cap remover 33 for the
purpose of removing the pressure sea-led type of jar cover
5% from a jar 41 is shown in FIGURE 8. Such jars are
vent the container while the former is sufficiently large 20 currently used for preserving foods, including fruits, veg
to permit the How of a sizable stream of liquid from the
etables, jellies and the like. During processing this type
container. As best shown in FIGURES 1, 2 and 5,
of jar is closed through the application of pressure on the
rib 31 and 31a pressed into a portion of the center sec
cap to force the seal thereof into full engagement with
tion of the member .14 and the spear 22, respectively,
the top lip of the jar. Thus, for purposes of cover re
functions to make the spear sufficiently strong to with
moval, the remover 33 is likewise hooked under the cover
stand the pressures exerted during the perforating opera
4i? with the member 14 extending crosswise of the top
tion. After the fragment of metal 27 has been cut, the
face of the cover. Manual pressure upwardly on the end
backside of the spear rib 31a sustains pressure thereon
of the member 14- in a semi-circular path will bring the
until the triangular tab 27 has been completely folded
shoulder of the extending hook 39 against a shoulder 42
against‘ the sidewall of the container. Likewise the pour 30 adjacent the top of the jar. This movement serves to
spear 22 is curved as shown in FIGURE 2 to sustain
pressure on the triangular tongue 27 during its downward
and sidewise travel until it has been completely deformed
to meet the curved sidewall of thecontainer 12. The
continued force imparted by the rib 31a then serves to
deform a portion of the sidewall of the container out
wardly until a pronounced pour trough 28 is created. As
shown in FIGURE 6, a notch 32 is provided in the ?ange
15 wherein the rib 31a can ?t and crowd the sidewall
metal in forming the ‘pour trough 28.
From the foregoing description of the structural de
tails of the can perforator device 10, it should be evident
that a very useful household tool has been invented.
When the lower member 13 is in place ‘on the top of a
can 12, the user of the device need only apply a nomi
nal downward pressure on the extending end of the mem
ber ‘14 to bring the spear 22 into engagement with the
top of the can. Continued pressure ‘will eifect penetra
tion of the metal, folding, trough formation, and ?nally
vent opening piercing.
Any person can manipulate the
device to effect a uniform perforation of the can top at two
diametrically opposed points ‘with a minimum of eiiort
and time. With this device literally dozens of cans could
be perforated in a matter of minutes.
Release of the de
vice is accomplished by merely reversing the procedure,
namely, raising the ‘upper member 14 until the spears
22 and 23 clear the can top and, thereafter, moving the
perforator assembly longitudinally until the ?ange hook
15 is parted from the edge or bead 16 of the container.
In order to provide the ‘greatest utility, the device v10
includese two additional features which insure multiple
uses therefor. The outer end of the member 14 includes
an integrally formed bottle cap remover 33 While the
outer end of the member 13 includes an integrally shaped
pry edge 34 which can be used to remove covers of the
raise the hook 39 upwardly ‘against the cover and force
the same away from the jar top and permit air to enter
the jar. It should be noted that the width of the hook
' 39 precludes all damage to the cover during removal.
Therefore, the cover can be reused repeatedly to reseal
the jar without fear that leakage may occur with the
usual attendant contamination.
Thus, it should be apparent that the device 10 not only
provides an improved means for simultaneously punching
40 two apertures in the top of cans or containers, namely a
formed pour opening and a vent opening, but also pro
vides a bottle cap opening means and a container cover
pry means.
All ‘are included in ‘a single unitary device
which is compact and of sufficient strength to withstand
the rugged use generally imparted to a household tool of
this type.
Anyone who has ever labored in the culinary arts is
well aware of the problem of opening containers whether
it be by penetration or cover removal and of the prime
need for a universal tool of the type described herein to
open the various types of containers presently utilized for
the containment of foods, paints, and other items of a
similar nature.
Although but one embodiment of the invention has
been shown and described, it should be apparent to one
skilled in the art to which this invention relates that vari
ous modi?cations of the invention are possible without
departing from the spirit and scope of the invention as
de?ned in the subjoined claim.
The principles of the invention having now been fully
explained in ‘connection with the foregoing description of
the embodying structure and as shown in the drawings,
we hereby claim as our invention:
A can perforator device operative to effectively perfo
rate and form a pour spout in a container and comprising
a lower member disposed to engage the end face of a
type found on paint and syrup containers. The pry edge
34 is suf?ciently wide to permit good retention with the
container, a projecting hook depending from said lower
container cover regardless of the diametrical size thereof.
member and having a curved lip'edge serving to engage
When used for this purpose, the lower member 13 is
grasped independently of the member 14 so that the mem 70 the peripheral sidewall of a container, a forming notch
ber can be readily manipulated into position against the
centraiiy disposed in said curving lip edge, an upper
member hingedly secured to said lower member substan
tially above said hook, a pour spear integrally formed
and depending from said upper member, an opening in
rectly behind the pryedge 34. Thus, a considerable lat
eral pressure can be applied manually to the member 13 75 said lower member to permit free passage of said spear
container cover. The member is stiffened by the use of
stamped ribs 35 and 36 which converge at a point di
therethrough, and a crowned rib on said pour spear op
References Cited in the file at this patent
erativeiy disposed to be moved adjacent to and facing
the forming notch in said hook, the spear being operative
to engage and cut a triangular tongue from the top of a
container and thereafter form the tongue and adjacent 5
sidewall between said spear rib and said forming notch
in said hook whereby ‘a uniformly shaped pour spout is
Venne _______________ __ Feb. 15, 1949
Bauer ________________ __ July 5, 1955
Atwater et a1 _________ __ Aug. 16, 1955
Wiemeri _____________ __ Oct. 25, 1955
Hon ________________ __ Nov. 26, 1957
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