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Патент USA US2412138

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Dec. 3, 1946. -
H. A. FINK
2,412,138
APPARATUS FOR SPRAYING CROWN CAPS
Filed Dec. 2, 1944
3 Sheets-Sheet 1
3mm
‘ fféntyliz'nk.
Dec. 3, 1946.
H, A, FINK
'
2,412,138
APPARATUS FOR SPRAYING CROWN CAPS
Filed Dec. 2, 1944
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Dec. 3, 1946.
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H. A. FINK
2,412,138
APPARATUS FOR SPRAYING CROWN CAPS
Filed Dec. 2, 1944
3 Sheets-Sheet 3
417-“;
27
13.5
.90
£5
32
JUAN/I'M
Henry JZ. R7178.
Patented Dem-3, 1946
I 2,412,138
UNITED STATES PATENT OFFICE
2,412,138
APPARATUS FOR SPBAYING CROWN CAPS
Henry A. Fink, Pelham Manor, N. Y., ascignor to
Continental Can Company, Inc., New York,
N. Y., a. corporation of New York
Application December 2, 194d, Serial No. 566,348
5 Claims.
(on. 91-45)
1
\The invention relates to new and useful im
provements in an apparatus for spraying crown
caps.
Owing to the shortage in the tin supply, crown
caps have been made from salvaged plate such
as old used tin can bodies that have had the
decorations removed therefrom, or from parts
of the can bodies which have not been decorated.
Caps have also been cut from scrap materials and
'
2
Figure 4 is a transverse sectional view through
the drying oven;
.
Figure 5. is an enlarged view in side elevation
of the magnetic roller and a portion of the con
veyors associated therewith.
The apparatus for coating the crown caps and
drying the coating-after it is applied thereto in
cludes a feed hopper in which the caps to be
coated are placed promiscuously. Associated with
old crowns have been reformed. The old crowns
the hopper are devices for feeding the caps onto
have had the decorations removed therefrom
a conveyor belt with all of the caps arranged in
and have then been reformed. In all such in- rows and facing upwardly, that is, the caps are
stances as referred to above it is found necessary
placed so that the inside of the cap may be
to recoat the caps in order to make them com
sprayed from above. The conveyor is a non-mag
mercially useable.
15 netic type of conveyor and moves continuously.
An object of the invention is to provide an
The conveyor passes beneath the spray nozzle
apparatus for spray coatingcrown caps which
which
is oscillated transversely of the path of
apparatus sprays ?rst one side of the crown cap
travel of the conveyor so as to spray all of the
and then the other while it is continuously mov
caps which are arranged as noted in a plurality
20 of rows. The conveyor passes over a magnetic
A further object of the invention is to provide
ing through the apparatus.
an apparatus of the above type wherein the caps
are placed in rows on a continuously travelling
endless conveyor for the ?rst spraying opera
pulley which will hold the caps tight against the
conveyor until the conveyor leaves the pulley and
then the caps will drop onto another endless
tion and are then inverted and placed on a sec 25 conveyor which conveys the caps in inverted posi
tion, that is, with the outer side of the cap fac
ond conveyor for a second spraying operation.
ing upwardly and while in this position, the caps
A further object of the invention is to pro
are fed beneath an oscillating spray coating device
vide an apparatus of the above type wherein a
for spraying the top side of the cap. The con
magnetic roller is utilized for the transfer of
the crown caps from one conveyor to the other 30 veyor then takes the caps through a relatively
long heated drying tunnel where the volatiles in
in an inverted position.
the coating material are driven off and the ma
A still further object of the invention is to pro
terial set so that the caps may be handled with
vide an apparatus of the above type'wherein the
out marring, after which the conveyor discharges
the caps onto another conveyor which leads
passed through a drying tunnel so that the coat
ing material is set su?iciently for the handling 35 through a baking oven where the coating on
the caps is converted into a hard enamel surface.
of the caps and the passing of the same through
Referring more in detail to'the drawings, the
a baking oven.
apparatus includes a framework which is prefer
A further object of the invention is to provide
ably made of angle iron. As shown in Figure 1,
in an apparatus of the above type means for
this angle iron frame includes a series of legs
cleaning the coating material from the conveyor
and longitudinally extending members. The
after it is passed through the drying oven.
longitudinally extending members I are provided
These and other objects will in part be obvious
with suitable brackets 2 in which is mounted a
and will in part be hereinafter more fully de
scribed.
'
45 shaft 3 carrying a belt wheel 4 over which an
endless belt conveyor 5 passes. Mounted on the
In the drawings
legs 6 is a cross shaft 1 carrying a roller 8 for
Figure l is a view showing more or less di
agrammatically and in side elevation a portion
supporting the belt. The legs 9, 9 extend above
of the apparatus for spray coating the crown
the conveyor 5 and are provided with side mem
caps;
50 bers ID in which shafts II and I2 are mounted,
Figure 2 is a similar view showing a portion of
one at one end of the side members and the other
the apparatusfor drying the coated caps;
at the other end.
Figure 3 is a transverse sectional view through
Mounted on these shafts are pulleys l8 and I 4
the apparatus adjacent one of the spray nozzles;
respectively, over which a belt conveyor l5 runs.
and
This belt conveyor is made of non-magnetic
crown caps after they are spray coated, are
‘2,419,138
woven steel. The pulley I3 is made of ‘magnetic
material.
The legs ".13 extendabove the conveyor 3
and carry a table II at the upper end thereof
on which is mounted a hopper l3. The crown 5
caps to be coated are placed promiscuously in
this hopper. Suitable means is associated with
the hopper for feeding the crown caps 'there
from through a plurality of chutes 20 so that the
caps are delivered from the chutes, all facing in 10
the same direction.
As shown in Figure 1, the -
crown caps which are indicated at C are so posi- '
tioned on the conveyor I! as they come from the
chutes that the inside of the cap will face up
wardly. In the present embodiment of the in
15
vention there are ?ve chutes and ?ve rows of
caps deposited upon the conveyor and carried
through the apparatus as shown in Figure 3.
This hopper and the means for feeding the caps
and delivering the same through the ?ve chutes 20
4
mounted on the frame of the machine in a man
ner similar to the motor 33 and illustration of the
same has not been given. The sprayer, head 23
is enclosed in a housing indicated in full lines
at 31 to which is attached a stack‘ 33 controlled
by a damper 33. The volatiles of the coating
material escaping therefrom will be collected in
this housing and carried away by suction through
the stack 33. There is a housing 40 associated
with the sprayer head 23 and this housing which
is indicated in full lines in Figure 1 and in full
lines in Figure 3, is connected to a stack 4| which
is controlled by a damper 42.
After the caps have been sprayed on both sides,
they are carried by the conveyor 5 into and
through ‘a tunnel 43, a part of which is shown in
Figure 1 and another part of‘ which is shown in
Figure 2. The tunnel is shown in cross section in
Figure 4. The legs 44, 44 of the frame carry the
guide bars 33, 33 along which the belt conveyor
so that they all face in the same direction is of
5 passes.
well known construction used in the manufac
ture of crown caps and further detailed descrip
bars 45, 43 which support a perforated plate 43.
Also mounted on these legs are angle
This provides a heat chamber 41 which is located
beneath the path of travel of the woven belt con
Mounted on the legs 3, 3 is a supporting bracket 25 veyor. Placed beneath the perforated plate are
2|. ‘This bracket is L-shaped and the left hand
burners 43, 43 and de?ectors 43, 43. This heat
end thereof extends upward and supports an arm
chamber extends the full length of the tunnel
and there are burner pipes arranged in sections
22 on which a sprayer head 23 is mounted. This
tion thereof is_not thought necessary.
-
along the tunnel. The tunnel 43 is in the form
may be oscillated transversely of the travel of 30 of an arch-shaped metal housing which is sup
the conveyor. The conveyor i5 is operated by a
ported on‘the guide bars 35, 35. Associated with
sprocket chain 24 which runs over a sprocket
the tunnel are a number of stacks, two of which
wheel on the shaft l2 and also over a sprocket
are indicated at 50. These stacks all lead to an
exhaust manifold which discharges the fumes
wheel on the shaft 3.
The crown caps are delivered onto the conveyor 35 coming off from the drying caps to the outside
of the building.
ll in ?ve rows. This conveyor moves continu
The belt conveyor 5 not only carries thev caps
ously and will carry the caps beneath the sprayer
through the drying tunnel, but also carries them ‘
head 23 which, as it oscillates back and forth
through a cooling hood indicated at 5|. Said
transversely of the conveyor, will completely coat
the interior surface of the crown cap and also 40 cooling hood overhangs the path of travel of the
belt conveyor and extends lengthwise thereof for
the'skirt. As the belt conveyor passes around
a relatively short vdistance. A pipe 32 leads into
the magnetic roller l3 the caps will be held mag
the hood at the upper end» thereof and discharges
netically tightly against the conveyor until the
air into the hood. The cooling air can pass down
conveyor leaves the magnetic roller, after which
the caps will be released and will drop onto the ~ through the ‘belt conveyor and out through the
discharge end of the hood. The air is supplied
conveyor 5 in inverted position, thatis, with the
outer surface of the cap facing upwardly. In
to the pipe 52 from a suitable fan 53.
this inverted position the crown caps are carried
The belt conveyor 3 runs over a pulley 33, thence
over a pulley 55, and thence under a pulley 54.
beneath a spray head 25. The spray head '28 is
sprayer head is so mounted on the arm that it
mounted on an arm 23 so that it may be oscil
lated thereon. This arm 23 is carried by a cross
The shaft 51 carrying the pulley 53 is operated
from a motor 33. A sprocket wheel carried by
bar 21 mounted on the legs l3, It. In Figure 3
the shaft 51 operates a sprocket chain which runs
over a sprocket wheel connected to the shaft 53
of the drawings the spray head His shown more
in detail. The supporting bar 23 has a lug 23 - on which the pulley 54 is ?xedly mounted. This
motor drives the conveyor 5. The other end of
?xed thereto and a link 30 is connected to the
the conveyor is mounted on the bracket 2 and
lug at one end and to a crank 3| at the other
this bracket is carried by the frame so that it
end carried by a shaft 32 which is driven by a
may be adjusted by an adjustable screw 30 for
motor 33. The motor is mounted on a bracket
taking up slack in the conveyor. The belt on
34. This bracket 34 is carried by one of the legs
I3. As the shaft 32 is rotated it will cause the 60 its return underneath the tunnel passes over sup
porting rollers 3|, 8|. The belt conveyor also
sprayer head to oscillate back and forth trans-'
passes between two rotating brushes 62, 62, one
versely of, the conveyor. This range of oscilla
of which engages the upper face of the conveyor
tion is sufficient to coat the crown caps C rest
and the other engages the lower face of the con
ing on the conveyor 5. It is noted from Figure
veyor. The purpose of these brushes is to re
3 that there are guide bars 35, 35 which extend
move from the belt conveyor the coating material
lengthwise of the apparatus, which guide bars are
which is dried thereon as the caps are carried
mounted on the supporting legs of the apparatus
through the drying tunnel. These brushes 32, ‘
and serve as a means for guiding and supporting
62 are driven by a suitable motor 33.
the conveyor 5. Located beneath the conveyor
The crown caps are discharged from the cool
8 is a drip pan 36 so that‘the coating material 70
ing hood onto a deflector plate 34 and thence
contacting the belt conveyor in between the
onto a conveyor 35 which carries the caps into a
crowns can pass through the same owing to the
baking oven.
fact ‘that it is a woven steel belt and will -.be col
The operation of the apparatus is thought to
. I
The sprayer head 23 is oscillated by a motor 75 be clear from the description given above. The
lectedinthe drip pan.
9,412,138
6
crown caps are placed in the hopper l9 and are
coated on rboth sides and the coating set so as to
fed therefrom onto the belt conveyor l5, all fac
permit the handling of the caps.
ing upward so that the inside of the caps may be
coated. They are placed on the conveyor in par
allel lines and, as illustrated, there are ?ve lines
of crown caps. This conveyor carries the caps
beneath the sprayer head 23 where they are
coated with a suitable coating material, after
which the caps are inverted and placed on the
belt conveyor 5. The belt conveyor 5 conveys the 10
caps through the housing 40 where they are again
sprayed by the spraying head 25. This ensures
that the crown caps will be completely sprayed
3..An apparatus for coating crown caps com
‘ prising a conveyor, means for placing caps to be
coated on said conveyor in a plurality of rows, a
spray head associated with said conveyor for
coating the exposed upper faces of the caps
thereon, a second conveyor disposed beneath the
?rst named conveyor onto which the caps are
discharged in inverted position, a second spray
head associated with the said last named con
, veyor for coating the upper exposed faces of the
caps thereon, a drying tunnel through which said
second conveyor passes after leaving the second
with the inside facing upwardly for the ?rst coat 15 spray head and means for heating the airin said
tunnel and a cooling hood under which said con
ing operation so that during the second coating
on both sides thereof. The crown caps are placed
operation after the caps have been inverted, they
veyor passes after leaving the drying tunnel
whereby the caps before leaving the conveyor are
are resting on the conveyor so that contact with
completely coated on both sides and the coating
the conveyor is only with the lower edge of the
skirt of the crown cap. This leaves the outer face 20 set so as to permit the handling of the caps.
4. An apparatus for coating crown caps com
of the crown cap which must be well protected
prising a conveyor of non-magnetic woven metal.
with the coating free from contact with the trav
means for feeding the caps onto said conveyor in
elling belt conveyor. This belt conveyor is trav
a plurality of rows with the inner faces of the
elling continuously and the caps are placed one
caps facing upwardly, a spray head associated
after another on ‘the conveyors, coated, inverted
with the conveyor, means for oscillating the
and then again coated and ?nally pass into and
spray head transversely of the conveyor for coat
through the drying tunnel.
ing all of the caps on the conveyor as they pass
'After leaving the drying tunnel the caps pass
beneath the spray head, a magnetic roller over
beneath a cooling section. The drying time and
which said'conveyor passes operating to retain
temperature is sufficient to keep the crown caps
the caps on the conveyor until they reach an in
from being marred when they fall from the con
verted position, a second conveyor beneath the
veyor 5 onto the conveyor 65 which leads to the
?rst named conveyor onto which the caps drop
baking oven.
with the outer faces thereof facing upwardly, a
It is obvious that many changes may be made
in the details of construction without departing 35 second spray head mounted above said last
named conveyorand means for oscillating said
from the spirit of the invention as set forth in
second spray head for coating the other face of
the appended claims. '
~
all of the caps thereon.
I claim:
,
5. An apparatus for coating crown caps com-'
1. An apparatus for coating crown caps com
prising a conveyor on which the caps are placed 40 prising a conveyor of non-magnetic woven metal,
means for feeding the caps onto said conveyor in
in a plurality of rows for coating, a spray head
a plurality of rows with the inner faces of the
associated with said conveyor for coating the ex
caps facing upwardly, a spray head associated
posed faces of the caps, said conveyor being of
with the conveyor, means for oscillating the
non-magnetic material, a magnetic roller over
which the conveyor passes, said roller operating
to hold the caps on the conveyor until they pass
from the magnetic in?uence thereof, a second
conveyor onto which the caps drop when released
spray head transversely of the conveyor for coat
ing all of the caps on the conveyor as they pass
beneath the spray head, a magnetic roller over
which said conveyor passes operating to retain
the caps on the conveyor until they reach an in
from the first conveyor in an inverted position, a
spray head associated with the second conveyor 50 verted position, a second conveyor beneath the
first named conveyor onto which the caps drop
for coating the exposed uncoated face of the caps.
with the outer faces thereof facing upwardly. a
2. An apparatus for coating crown caps com
second spray head mounted above said last named
prising a conveyor on which the caps are placed
conveyor, means for oscillating said second spray
for coating, 9. device associated therewith for
spray coating the exposed face of the caps, a sec 55 head for coating the other face of all of the caps
thereon, a drying'tunnel, means for heating the
_ and conveyor disposed beneath the first named
drying tunnel, said tunnel being disposed so that
conveyor onto which the caps are discharged in
the conveyor with the coated caps thereon pass
inverted position and a second device associated
through the tunnel, and a cooling hood disposed
with said last named conveyor for-spray coating
the exposed uncoated face of the caps, a drying 60 relative to the tunnel so that the coated caps
after leaving the tunnel pass beneath said cooling
tunnel through which said second conveyor
passes after leaving the second spray head and _ hood so that the coating applied to the caps will
be set and hardened su?iciently for handling be
means for heating the air in said tunnel and a
fore the caps leave said second conveyor.
cooling hood under which said conveyor passes
after leaving the drying tunnel whereby the caps 65
before leaving the conveyor are completely
HENRYLFINK.
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