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Патент USA US3028837

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April 10, 1962
E. 1. VALYI
3,028,827
METHOD OF MANUFACTURING METAL CANS
Filed Oct. 10, 1957
5 Sheets-Sheet 1
/
INVENTOR
EMEBY. .Z'. VAL Y/
A'ITORNEY
'
April 10, 1962
E. l. VALYl
3,028,827
METHOD OF MANUFACTURING METAL CANS
Filed Oct. 10, 1957
3 Sheets-Sheet 2
INVIENTOR
z M44 Y_/ .
/
-
O'RNEY
Aprll 10,' 1962‘
E_ I’ VALY]
3,028,82 7
METHOD OF MANUFACTURING METAL CANS
Filed Oct. 10, 1957
3 Sheets-Sheet 3
ATTORNEY
‘United States Patent 0 " me
I
1
3,028,827
METHOD OF MANUFACTURING METAL CANS
Emery I. Valyi, Bronx, N.Y. (% ARD Corporation,
20 S. Broadway, Yonkers 1, N.Y.)
Filed Oct. 10, 1957, Ser. No. 689,303
12 Claims. (Cl. 113-420)
3,028,827
Patented Apr. 10, 1962
2
cross-section and distribute evenly the weld-preventing
substance. In the case of rolling an assembly of super
imposed plates, care should be taken in rolling to insure
complete welding in the areas not treated to prevent
Welding.
The strip or coil so produced may then be cut longi
tudinally into strips, each containing a single laminated
This invention relates to the preparation of metal cans
area. Alternatively, the strip may be cut transversely into
and containers of the type used for packaging and stor
strips containing several laminated areas each having
age of food stuffs or other commodities and has for an 10 a length adapted to produce one can body. These strips
object to provide a novel and improved method for manu
may be further subdivided and ultimately cut into pieces
facturing such cans and containers.
or blanks adapted to produce a single can body. These
. This application is a continuation-in-part of my applica
can bodies may be formed by separating therlaminations
tron Serial No. 621,192 ?led November 9, 1956 now
of the blank or strip either mechanically with the aid of
abandoned, for Can and Method of Manufacture Thereof. 15 a mandrel, or by means of an air blast or ?uid pressure.
Another object is to provide a method for making cans
The methods of mechanical separation, pneumatic in?a
of the above type in which the steps of bending a ?at
tion and ?uid expansion may be used singly, combined,
blank into cylindrical form and sealing the contacting
or applied in sequence, to form the cylindrical body
edges are eliminated.
portion required for the ?nished cans.
'
Various other objects will be apparent as the nature 20
The portions of the blank on opposite sides of the lam'i
of the invention is more fully disclosed.
nated area form ?ns along diametrically opposite por
In accordance ‘with the invention, metal strip or plate ' 4
is producing having alternating parallel regions of ?at
juxtaposed layers and integral metal. Such strip or plate
tions of the can body which may be cut to form narrow
treated or these openings are formed by or ?lled with a
product which usually has a soldered or welded seam.
ribs and folded ?at against the outer surface of the can
body. Ends in the form of substantially flat closures are
may be produced somewhat along the lines set forth in my 25 then applied to the open ends of the cylindrical body por
US. Patent No. 2,375,334, dated May 8, 1945. Thus, an
tions and mechanically folded, crimped, seamed, or other
ingot or slab of metal is formed having therethrough one
wise secured in the usual manner. to produce cans or
or more continuous relatively small openings which may
containers of the desired con?guration.
be of any preferred cross-section, as for example, a rec
Thus, a can or container is produced characterized by
tangular cross-section. The surface of these openings is
a body of seamless construction in place of the present
material that by its nature prevents the openings from
welding if their juxtaposed surfaces are brought into close
contact under considerable pressure. For example alumi
In place of the seam, the can body according to the in
vention will have two reinforcing ribs of metallurgical
characteristics substantially identical with those of the
num oxide formed in situ by chemical treatment of the 35 other portions of the body, such characteristics being
inside surface of the openings, or talc may be used as _ that of a metal rolled essentially in one direction from
the weld-preventing material with an aluminum ingot or
a block of substantially greater thickness.
slab; ?nely divided silica or graphite may be used with a
The article and the steps in forming it will be better
copper or copper alloy ingot or slab; and ?nely divided
understood from the following description, taken in con
silica or mica, or boron nitride may be used with a steel 40 nection with the accompanying drawings in which a spe
ingot or slab.
ci?c embodiment has been set forth for purposes of illus
Alternately such a strip or plate may be formed with
tration.
thin openings, by applying, such as by spraying, painting
In the drawings:
or printing, a thin layer of the Weld-preventing materials
FIG. 1 is a transverse section through a mold showing
previously cited as examples, to one surface of a sheet, 45 a slab or casting and weld-preventing inserts therein;
by superimposing another like sheet ‘over the ?rst one and
FIG. 2 is a broken perspective view of the slab or cast
by rolling the two oonjointly to ‘a degree su?icient to cause
welding together of the two sheets wherever the. weld
preventing substance is not present. ’ This method is illus
ing of FIG. 1;
.
FIG. 3 is a broken perspective view of the coiled strip
formed by rolling the slab casting of FIG. 2 showing
trated in the above-mentioned patent and is also described 50 severance lines for forming can blanks or strips;
in US. Patent, No. 2,690,002, issued to Grenell on Sep
FIG. 4 is a view similar to FIG. 3 illustrating a strip
tember 28, 1954.
of single can forming width indicating severance lines
The slab of metal, or alternatively, the assembly of
for making a single can blank;
superimposed metal plates is rolled to form a ?at sheet
FIG. 5 is a perspective view on a larger scale of an
or coil in which the portions previously treated with the 55 individual can blank cut from the coiled strip of FIGS. 3.
weld-preventing substances produce a laminated structure
or 4 and indicating shear lines along which the corners
of juxtaposed individual layers While the adjacent por- tions that were not so treated produce an integral struc
may be cut for the purpose to be described;
FIG. ,6 is a broken perspective view of a single can
ture alongside the laminated structure. The operation of
blank taken on a larger scale showing the step of slightly
rolling to produce this sheet or coil may be performed 60 opening or in?ating the end of the blank; .
hot or cold depending upon the nature of the speci?c metal
FIG. 7 is a broken perspective view showing the step
to be rolled, generally in keeping with procedures known
of forcing the blank over a mandrel for continuing the
to those skilled in the art of rolling metal. If the grain
opening thereof;
structure of the slab requires rolling in more than one
FIG. 8 is a transverse section ‘taken on ‘the line 8-8
direction, any cross rolling that is performed must be 65
of FIG. 7;
7
.
carried out exactly perpendicular to the longitudinal axis
FIG. 9 is a broken perspective view showing a ?nal
of the portions treated with weld-preventing substance so
stage in opening the blank on the mandrel to form the
as to prevent distortion of the passages. In rolling the
can body;
slabs as above described, an appreciable degree of reduc
FIG. 9a is a partial section taken on the line 9a—)a
‘tion in cross-section of the slab should be made as early 70
of FIG. 9 illustrating the folded ?n or rib;
in the course of the rolling operation as the grain struc
FIG. 10 is a broken perspective view illustrating anv
ture of the slab will permit in order to crush, reduce in
3,028,827
3
alternate method of opening or expanding the blank to
form the can body;
FIG. 11 is a perspective view of the can body with an
end closure in place prior to crimping;
FIG. 12 is a similar perspective view of the completed
can showing one end closure secured by crimping and the
other end in juxtaposed position prior to closing the can;
FIG. 13 is an enlarged section taken on the line 13—13
of FIG. 12;
4
mandrel the intervening portions of the walls 21 and 22
may be extended away from the surface of the mandrel
so that it is not necessary that the mandral have the full
?nal form which the can body is to assume.
The areas of the sheet beyond the ?attened slit 23 pro
duce longitudinal ?ns 32 which extend along the side
walls of the cylindrical body. Before or during the ex
panding operation these ?ns may be cut close to the can
body as indicated by dotted line 34 in FIGS. 7 and 8 to
FIG. 14 is a perspective view of an expanded tubular 10 form narrow ribs 35 to render the corresponding wall area
ilar to FIG. 2 but having four spaced superposed inserts;
resistant to rupture in subsequent can body forming steps.
In the ?nal form such as indicated in FIGS. 9 and 9a the
ribs 35 may be folded over or crushed against the side
walls of the can as by pairs of rollers 36.
a casting 10 cast in a mold 11 around a series of weld
to roll the blank circumferentially so as to complete the
in the succeeding stages of the can-forming operation may
and 42 as illustrated in FIG. 11 and a can end or bot
body as produced from the strip of FIG. 4 indicating
severance lines for forming single can bodies;
FIG. 15 is a broken perspective view of a casting sim
An alternate means for expanding the blank into cylin
FIG. 16 is a broken perspective view on a larger scale 15
drical form is illustrated in FIG. 10. This method may
of a can body formed from the casting of FIG. 15; and
be used in instances where the entire length of the slit 23
FIG. 17 is a broken perspective view of a pair of super
is opened such as by ?uid means so as to provide sufficient
posed sheets prior to rolling illustrating a further em
clearance for the insertion of a roller. The blank is then
bodiment of the invention.
Referring to the drawings more in detail, FIG. 1 shows 20 introduced between rollers 38 and 39 which are actuated
opening of the walls 21 and 22 into full cylindrical form.
preventing inserts 12. The ends of the inserts 12 seat in
It is to be understood that the strip 24 may be opened by
recesses 17 in the mold to hold the inserts in place during
the steps indicated in FIGS. 6 to 9 to form a long tube 48
pouring.
as shown in FIG. 14 which may then be separated along
25
The slab 10 after removal from the mold and with the
severance lines 49 into individual can lengths. or the
inserts still in place as shown in FIG. 2 is rolled longi
blanks 28 of FIG. 5 may be opened individually after
tudinally by known technique to form the sheet 20 of
severance to form can bodies.
FIG. 3 with walls or laminations 21 and 22 separated by
Also the walls may be separated to a limited extent
a slit 23 in the areas of the now ?attened inserts.
During the rolling the inserts 12 are crushed to a weld 30 prior to severance into individual can blanks and the
opening of the walls completed after severance.
preventing powder form keeping the walls 21 and 22
It is to be understood of course that these methods of
from welding together.
opening the blank are purely illustrative and that the
The strip 20 may be of substantial length depending
walls may be formed by any convenient means into the
upon the amount of elongation produced by the rolling
‘
operation and is shown as formed into a coil 19 for con 35 shape required for the ultimate can.
The ends of the cylindrical body 40 formed as above
venience. It is to be understood that the coiled sheet may
described are now bent to form peripheral end ?anges 41
be shipped if desired in this form to a remote point where
tom 44 in the form of a metal disk is placed against the
40 end flange 41 and folded over or crimped as indicated in
shipping.
FIGS. 12 and 13 in accordance with the usual practice
The strip 20 may ?rst be severed as by cutting, shear
of forming a closed end can. The top 45 may be secured
ing or breaking along severance lines 25 to form individual
in a similar manner after the can has been ?lled.
strips 24, as shown in FIG. 4, which may then be sepa
The corners of the blank may be removed as indicated
rated along severance lines 26 into single can blanks 28
either before or after opening, or the strip 20 may be 45 by lines 29 of FIG. 5 to a depth to intersect the slit 23
so as to form notches 47 in the end ?anges 41 and 42.
severed transversely along severance lines 27 into strips
These notches are adapted when the ?anges are crirnped
of multiple can width which are then severed along sev
take place or the can may be completed prior to such
over as indicated in FIG. 13 to eliminate the extra thick
erance lines 25 into single can blanks 28, or the trans
ness of the metal which would otherwise be present at
verse and longitudinal severance may take place simul
taneously to produce the single can blank 28 of FIG. 5. 50 that point due to the ribs 35. Such notching of the
blank may be omitted if the thickness of the metal is such
The corners of the blank 28 (FIG. 5) may be out if
that the presence of the ribs 35 at the point of crimping
desired along lines 29 for the purpose to be described,
is not objectionable.
although such removal of the corners may be omitted
In the event that the rolled strip of FIG. 3 is shipped
when this step is found to be unnecessary.
The strip or blank 28 may now be opened by me 55 to the point of packaging, the can-forming steps illus
trated in FIGS. 6 to 13 may take place at the packaging
chanical, pneumatic or hydraulic means to expand the slit
point
thereby reducing the shipping space which would
23 and form the walls 21 and 22 into the shape of a can
otherwise be required for shipping the formed cans.
body. One method of so opening the strip or blank
The can end has been shown in FIG. 13 as attached to
is illustrated in FIGS. 6 to 9.
the
end of the can 40 by a speci?c type of crimping. It is
In accordance with FIG. 6 one end of the slit is ?rst 60
understood of course that the end may be secured in
opened very slightly by means of a air jet 30 which is
directed toward the slit and separates the leading edges
of the walls 21 and 22. In some instances the walls may
be opened partially or completely along their entire length
various ways which are common in the art.
FIGS. 15 and 16 illustrate the steps in a method of
forming a two-compartment can. In accordance with
by means of this air jet or ?uid pressure may be applied 65 this embodiment the slab or casting 50 is provided with
pairs of weld-preventing inserts 51 which are in spaced
to the slit 23 for separating the walls 21 and 22.
juxtaposed relationship and which have a metal wall 52
The strip or blank with the separated walls of FIG. 6
therebetween. When this slab 50 is rolled in accordance
may then be guided over a mandrel 31 as illustrated in
with the procedure above described to form a rolled
FIGS. 7 and 8 by suitable feed means, such as rollers (not
shown) to cause the walls to be progressively opened into 70 sheet and then opened into the form of a can, as shown
in FIG. 16, the intermediate metal wall 52 forms a dia
substantially cylindrical form, or to such other form as
phragm 53 (FIG. 16) which acts as a partition to divide
may be required for the can body.
the can body longitudinally into two separate compart
Opposite sides of the can body may be pushed inwardly
ments. Ends may be applied to this can body in any
to facilitate the forming of the walls 21 and 22 into the
>- desired shape. If the sides are so pushed against the 75 suitable manner.
3,028,827
5
6
FIG. 17 illustrates an alternate method for forming
the rolled sheet in which a pair of metal sheets 55 are
8. The method set forth in claim 5 in which said sever
ing step takes place after said walls have been at least '
superimposed with weld-preventing material 56 disposed
partially separated.
therebetween in the areas corresponding to the slit 23 of
9. The method of making a multi-compartment can
which comprises forming a metal member having a pair.
FIG. 3. These sheets may be roll-welded to form a com
posite sheet similar to the coiled strip of FIG. 3.
What is claimed is:
1. The method of making a metal can comprising
forming a metal blank having a passage extending there
of super-imposed longitudinal passages extending there- ‘
through and separated by an intervening wall and con- .
taining a weld~preventing material, rolling said strip lon
gitudinally of said passage to form an elongated thin
through containing a weld-preventing material, rolling 10 metal st-rip having outer walls and an intermediate wall
said blank to form a flat sheet having a pair of walls
separated by a slit in the area corresponding to said
passage, and having integral ?n-forming areas adjacent
said slit, said walls being prevented from welding to
gether during the rolling operation by said weld-prevent
separated by upper and lower narrow slits in the areas
corresponding to said passages, expanding said outer walls
to form a can body in which said intermediate wall con
stitutes a transverse diaphragm separating said body into
15
ing material, separating said walls to form an open end
said ?ns at a stage subsequent to the initial separation
of said walls to a compressing force adapted to deform
said ?ns to an extent to conform them nearly, but not 20
completely, to the contour of said walls, while leaving
two chambers, said body having integral longitudinal ?ns,
subjecting said ?ns at a stage subsequent to the initial
separation of said outer walls to a compressing force,
can body having integral longitudinal ?ns, subjecting
adapted to deform said ?ns to an extent to conform them
nearly, but not completely, to the contour of said outer
walls, while leaving raised metal ribs extending longitudi
nally along said outer walls and thereby render the corre
raised metal ribs extending longitudinally along said
sponding wall area resistant to rupture in the subsequent
walls and thereby render the corresponding wall area re
can body forming steps, adapting at least one end of said
sistant to rupture in the subsequent can body forming
body to receive an end closure, and securing said end
steps, ?aring at least one end of said can body to form 25 closure thereto.
a peripheral ?ange thereon, applying an end closure to
10. The method of making a metal can body compris
said ?ange, and securing said end closure thereto.
ing forming a metal blank having a passage extending
2. In the method set forth in claim 1 the additional
step of removing the corners of said ?n-forming areas
along a line intersecting said slit.
3. The method of making a metal can as set forth in
claim 1 in which said end closure is secured to said pe
ripheral ?ange by crimping.
therethrough containing a weld-preventing materiaLroll
ing said blank to form a ?at sheet having a pair of walls
30 separated by a slit in the area corresponding to said pas
sage, and having integral ?n-forming areas adjacent said
passage, said walls being prevented from welding together
during the rolling operation by said weld-preventing ma
4. The method of forming metal cans which comprises
forming a metal blank having a plurality of parallel 35 terial, separating said walls to form a can body having
integral longitudinal ?ns, subjecting, said ?ns at a stage
passages extending longitudinally therethrough and con
subsequent to the initial separation of said walls to a
taining a weld-preventing material, rolling said blank
compressing force adapted to deform said ?ns to an ex
longitudinally of said passages to produce an elongated
tent to conform them nearly, but not completely, to the
?at sheet having walls separated by narrow slits in the
areas corresponding to said passages and having integral 40 contour of said walls, while leaving raised metal ribs ex
tending longitudinally along said walls and thereby render
?n-forming members between and adjacent said pas
the corresponding wall area resistant to rupture in the sub
sages, severing said sheet along said ?n-forming mem
sequent can body forming steps, and ?aring at least one
bers to form strips, separating said walls to form can
end of said can body to form a peripheral ?ange thereon
bodies having integral longitudinal ?ns, subjecting said
?ns at a stage subsequent to the initial separation of said 45 adapted to receive an end closure.
11. The method of forming metal can vbodies compris
walls to a compressing force adapted to deform said ?ns
ing forming -a metal blank having a plurality of parallel
to an extent to conform them nearly, but not completely,
passages extending longitudinally therethrough and con
to the contour of said walls, while leaving raised metal
ribs extending longitudinally along said walls, and thereby
taining a weld-preventing material, rolling said member
render the corresponding wall area resistant to rupture 50 longitudinally of said passages to produce an elongated
?at sheet having walls separated ‘by narrow slits in the
in the subsequent can body forming steps, ?aring at least
areas corresponding to said passages and having integral
one end of each of said bodies to form a peripheral ?ange
?n-forming
members between and adjacent said passages,
thereon, applying an end closure to said ?ange, and se
curing said end closure thereto.
5. The method of forming a metal can from an in
tegral blank having metal. walls separated by a narrow
slit in selected areas only and integrally joined in other
?n-forming areas which comprises severing said blank
into can body lengths, separating said walls to form can
bodies having integral longitudinal ?ns, subjecting said
?ns at a stage subsequent to the initial separation of said
walls to a compressing force adapted to deform said ?ns
to an extent to conform them nearly, but not completely,
to the contour of said walls, while leaving raised metal
severing said sheet along said fin-forming members to
form strips, separating said walls to form can bodies hav
55 ing integral longitudinal ?ns, subjecting said ?ns at a stage
subsequent to the initial separation of said walls to a com
pressing force adapted to deform said ?ns to an extent to
conform them nearly, but not completely, to the contour
of said Walls, While leaving raised metal ribs extending
60 longitudinally along said outer walls and thereby render
the corresponding wall area resistant to rupture in the
subsequent can body forming steps, and ?aring at least
one end of each of said bodies to form a peripheral ?ange
ribs extending longitudinally along said walls and thereby 65 thereon adapted to receive an end closure.
12. The method of forming a metal can body from an
render the corresponding wall area resistant to rupture
in the subsequent can body forming steps, ?aring at least
one of each of said can bodies to form a peripheral ?ange
thereon, applying an end closure to said ?ange, and se
integral ‘blank having metal walls separated by a narrow
slit in selected areas only and integrally joined in other
?n-forming areas which comprises severing said blank into
can body lengths, separating said walls to form can bodies
curing said end closure thereto.
6. The method of making a metal can as set forth in
having integral longitudinal ?ns, subjecting said ?ns at a
claim 5 in which said ?ns are trimmed to remove excess
stage subsequent to the initial separation of said walls to
metal prior to the step of deforming said ?ns.
a compressing force adapted to deform said ?ns to an ex
7. The method set forth in claim 5 in which said sever
tent to conform them nearly, but not completely, to the
ing step occurs prior to the step of separating said walls. 75 contour of said walls, while leaving raised metal ribs ex- ’
3,028,827
7
tending longitudinally along said outer walls and thereby
render the corresponding wall area resistant to rupture in
the subsequent can body forming steps, and ?aring at
least one end of each of said can bodies to form a periph
eral ?ange thereon adapted to receive ‘an end closure.
References Cited in the ?le of this patent
UNITED STATES PATENTS
29,276
660,730
1,723,659
1,776,855
Holmes ______________ __ July 24, 1860 10
Miller _______________ _._ Oct. 30, 1900
Rosenqvist ____________ __ Aug. 6, 1928
Holmes _____________ __ Sept. 30, 1930
1,779,607
1,93 8,633
2,299,090
2,342,109
2,424,188
2,453,165
2,458,008
2,695,061
2,702,429
2,759,246
3
Lewis et a1. “a ________ __ Oct. 28, 1930
Maskrey _____________ __ Dec. 12, 1933
Hothersall ____________ __ Oct. 20,
Atkinson ____________ __ Feb. 22,
Pearson ______________ __ July 15,
Thornburgh __________ __ Nov. 9,
Kruse ________________ __ Jan. 4,
Laxo ________________ __ Nov. 23,
Peters et a1 ___________ __ Feb. 22,
Campbell ____________ __ Aug. 21,
1942
1944
1947
1948
1949
1954
1955
1956
FOREIGN PATENTS
205,695
Australia _____________ __ Nov. 1, 1956
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