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Патент USA US2124823

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July 26, 1938.
A. L. KRONQUEJST
METAL CQNTAINER3 FOR‘ BEVERAGES
Filed April 8, 1936
m'avazw
2,124,823
2,124,823
Patented July 26, 1938
‘UNITED STATES
PATENT OFFICE
2,124,823
METAL CONTAINER FOR BEVERAGES
Alfred L. Kronquest, Syracuse, N. Y., assignor to
Continental Can Company, Inc., New York,
N. Y., a corporation of New York
Application April 8, 1936, Serial No. 73,354
2 Claims. (Cl. 220-64)
In my prior Patent No. 2,117,180, granted May
10, 1938, I have shown and described a metal
can for beverages which is provided with a coat
ing on the’ inner face thereof after the can is
5 made up and ready for ?lling, which coating is
chemically inert to the action of the beverage
thereon and which prevents the beverage from
contacting with the metal of the can. The pres
ent invention relates to an improvement in the
10 can disclosed in the aforesaid patent.
An object of the invention is to provide a can
wherein the bottom end is so shaped as to fa
cilitate the forming of a coating which com
_ pletely covers the same.
A further object of the invention is to provide
cated at l2. The coating completely covers the
entire surface of the body and the ends thereof.
The coating used is preferably a petroleum wax
which has the characteristic of being ductile at
low temperature, so that it will not fracture
when the metal of the can is bumped and bent
and which also has a melting point of 160° F., so
that it remains solid and ?rm on the can wall
even when the can‘is heated to the temperature
used for the pasteurizing of beer. The thermo
plastic coating material is melted and poured
or sprayed over the inner surface of the can, and
the surplus material is drained from the can
leaving a thin ?lm adhering to the wall of the
can. One of the purposes of shaping the bottom 5
a can of the above type wherein the bottom end as described above is to insure that said end is
is so shaped as to remain rigid and free from ' free from shoulders. When the bottom end has
bulging under the internal strains placed there
on incident to the pasteurizing of the beverage
20 after the can is closed.
In the drawing:
Figure 1
'
likely to expose the metal. When, however, the
metal has a continuous uniform shaping free
_
a "sectional viewnthrougnb ,“can
embodying the improvements;“
__
1"
Fig. 2 is a bottom end view thereof; and
threw?
25
the
Fig.
lower
3 isportionpig-ihevcan
an enlarged sec V _
_‘
v
>
The can embodying my improvements includes
a body portion 1 which is made fromisheet metal
rolled into cylindrical form and having its side
30 edges joined by a side seam 2.
Theupper end‘
of the body portion | is provided with the usual
flange and the top closure end 3 is secured there
to by a double seam 4. The closure end 3, as
shown, is dome-shaped, and terminates in a
35 neck portion to which a crown cap 5 may be se
cured for closing the same.
an annular rib or shoulder, the wax or like ma
terial thins to a point at the shoulder which is
>
The body portion ‘I is ?anged at its lower edge
and a bottom end 6 is secured thereto by double
seaming, as indicated at .‘I. This bottom end is
40 so shaped as to provide an inset portion 9 which
extends into the body substantially a distance
equal to the height of the double seam ‘I. This
is for the purpose of enabling a chuck to be in
serted in the end against which the metal parts
are rolled in the forming of the double seam ‘I.
From the point 10 to the point I l at the opposite
side of the can body and on every diameter of
the can end, the metal is curved continuously and
uniformly so as to provide an inwardly extend
50 mg dome, shaped preferably with the same ra
dius of curvature throughout its entire extent.
The can is coated on the interior thereof with
a material which is thermoplastic and which has
no deleterious effect upon the beverage which is
171 L1 to be stored in the can. Such a coating is indi
from shoulders, then there is a substantial coat
ing ?lm formed over the entire extent of said
bottom» end. The material used for the coating
of the interior of the can is, preferably a petrole
wax produced in the de-waxing of residual
lubricating oils, such as cylinder stocks. One of
these waxes is known to the trade as"‘Cerese EE”
'wax.
Such a wax is particularly useful in the
coating of a thin sheet metal can, as it is very
ductile at low temperatures and does not crack
or craze when the metal wall is accidentally
bent. It also has a suiliciently high boiling point
so that it ‘remains solid and undisturbed when
‘ the beverage is heated to a su?icient temperature
for the pasteurizing of the same. It will be un
derstood, however, that other forms of thermo
plastic coating materials may be used. _
When beer is packed in a can and the can
sealed, it is subjected to a. pasteurizing tem
perature which creates an internal pressure with
in the can which produces a heavy bulging strain
on the ends of the can. The curved bottom end
forms a very rigid structure, resisting the inter
nal pressure and the bottom, end is not bulged
or ?exed so as to disturb the coating adhering
thereto at the junction of the side wall of the
body and the bottom. end.
_
While the can as illustrated is provided with a
dome-shaped top end, closed by a crown cap, it 50
will be understood that from certain aspects of
the invention, the upper end of the can body may
be otherwise closed. The essential features of
the present invention reside in the construction
of the bottom end which is shaped so as to give 55
2
2, 124,823
strength thereto and facilitate the coating of the
same with a substantially uniform- thickness of
material.
Having thus described the invention, what vI
claim as new and desire to secure by Letters
Patent, is:
1. A sheet metal container for beverages in
cluding a cylindrical body portion, the edges of
which are joined by a solder bonded seam, a top
10 end secured to said body portion by double-seam
ing, said top end being dome-shaped and termi
nating in a neck portion to which a crown cap
may be secured for closing the same, a bottom
end secured to said body portion by double-seam
15 ing, said bottom end having _a portion thereof
extending inwardly and contacting with the body
wall in the region of the double seam, said bottom
end between said inwardly extending portions be
ing uniformly concave from the inner face of the
20 body wall at one side of the can body to the
inner face of the body wall at the ‘other side there
of, said body and top and bottom ends having
on the inner face thereof a continuous coating
of a petroleum wax firmly adhering to and com
pletely covering the inner surface of the body,
the inner surface of the top end and the inner
surface of the bottom end.
2. A sheet metal container for beverages'in
eluding a cylindrical body portion, a bottom end
secured to said body portion by double seaming,
said bottom end having a portion thereof ex
tending inwardly and contacting with the body
wall in the region of the double seam, said bot
tom end between said inwardly extending por
tions being uniformly concave from the inner
10
face of the body wall at one side of the can body
to the inner face of the body wall at the other
side thereof, said body wall and bottom end hav
ing on the inner face thereof a continuous coat
ing of a petroleum wax ?rmly adhering to and
completely ~covering the inner surface of the
body, and the inner surface of the bottom end.
20
ALFRED L. KRONQUEST.
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