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Патент USA US2109647

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March 1, 1938.
M 5_ NORTH
2,109,647
APPARATUS FOR COATING SURFACES '
Filed Nov. 6, 1935 ‘
2 Sheets-Sheet l
,
INVENTOR.)
Mortimer dJVorZh)
a
_
y
am
ATTORNEY.
March 1, 1938.
.
M. 5. NORTH
’
2,109,647
APPARATUS FOR COATING SURFACES
Fil d Nov. 6, 1935
2 Sheets-Sheet 2
k
,
ATTORNEY.
Patented Mar. 1, 1938
2,19%“?
UNITED STATES PATENT’ OFFICE
_
2,109,647
APPARATUS‘FOR COATING SURFACES
Mortimer 8. North, Evanston, Ill._
Application November 6, 1935, Serial No. 48,459
17 Claims. (CI. 91—18)
This invention relates to the coating of paper, desired manner, so that both rolls rotate or
travel in the direction indicated by the arrows,
or other sheet material, with paint, enamel, rub
ber or other viscous liquids, for various purposes.
and the roll 6 is supported by a receptacle 1
Generally stated, the object of the invention containing the paint or enamel or rubber or other
5 is to provide an improved apparatus for the coat
viscous material 8, to be applied to the paper or
ing of paper, or other sheet material, by forcing other sheet material. The receptacle 1 is moved
the viscous liquid through a wire screen, or
screen of any suitable material, onto the surface
of the paper or other sheet material, to thereby
10 insure a uniform thickness for the coating thus
applied to the sheet material, as well as a per
fectly smooth and even surface therefor, in the
production of coated paper, or other sheet mate
rial.
It is also an object to provide certain details
and features of construction ‘tending to increase
the general ef?ciency and desirability of an ap
paratus of this particular character.
To the foregoing and other useful ends, the
invention consists in matters hereinafter set
forth and claimed and shown in the accompany
ing drawings, in which
embodying the principles of the invention, show
25 ing the same in normal ‘condition, before the
_
'
Fig. 2 is a similar view showing the apparatus
in operation, with the paper being given the
required coating.
cam 9, so that the two rolls are relatively mov- -
able toward and away from each other, the re
ceptacle ‘I being pivoted at Ill for this purpose. 10
A wire screen H is disposed between the two
rolls, as shown, with its end portions wound on
the rolls l2 and is, these screen rolls rotating
in the direction indicated by the arrows, to feed
the screen periodically between the two rolls I
and 6, previously mentioned. In practice, the
feeding stroke is about an inch, so that after each
coating operation, a section of fresh screen is
fed between the two rolls I and 6, as will herein
after more fully appear, the screen being sup 20
ported intermediately by the idler roll H, as
shown.
Fig. 1 is a diagrammatic view of an apparatus
paper is inserted for treatment.
up and down by any suitable means, such as the
,
Fig. 3 is an enlarged diagrammatic view show
ing certain details more clearly, with the ele
ments in the same condition in which they are
shown in Fig. 1 of the drawings.
Fig. 4 is a similar view, showing the elements
35 in the same condition in which they are shown
in Fig. 2 of the drawings.
Fig. 5 is an enlarged detail section on line 5-5
in Fig. 4 of the drawings, showing a certain size
30
wire for the screen.
40
Fig. 6 is a similar view, showing a sma'iler‘size
wire for the screen.~
Fig. '7 is a detail sectional view, showing the
thickness of coating resulting from the use of
the screen shown in Fig. 5 of the drawings.
45
Fig. 8 is a similar view showing the thickness
of coating resulting from the use of the screen
shown in Fig. 60f the drawings.
As thus illustrated, referring to Figs. 1 and 2
of the drawings, the invention comprises a rela
50 tively large main roll I, having a portion of its
periphery provided with a felt cushion 2, with a
clip 3 at the forward edge of said cushion to grip
the sheet of paper 4, which latter is supported
Any suitable means can be employed
for intermittently rotating the rolls l2 and IS
in properly timed relation to the other elements
of the apparatus.
-
Assuming that the apparatus has been started,
the rolls l and 6 are brought together, as shown
in Fig. 2 of the drawings, with the paper 4 be
tween the felt 2 and the screen II, with enough
pressure to insure the coating of the under side 30.
of the paper. The ?lm of viscous liquid, carried
upwardly by the roll 6, is pressed through the
meshes of the screen against the under side of
the paper, while the latter is being carried along
by the rotation of the roll I, and during this
time the screen II is standing still, but the roll
6 is rotating to feed the viscous liquid to the
lower surface of the paper, through the meshes
of the screen, as stated, and as illustrated in
Fig. 4 of the drawings. As soon as the entire 40
surface of the paper has been coated, the roll 6
moves downwardly, as a result of the action of
the cam 9, and before another sheet of paper
has been brought into position to be coated, the
rolls l2 and I3 are actuated to feed about an
inch, more or less, of fresh screen into position
for the next operation, whereby a perfectly clean
and fresh section of the screen is fed into posi
tion, for each sheet of paper. The clean screen,
therefore, is unwound from the roll I3, and the
The lower
sticky or used portions of the screen are wound
on the roll l2. After the entire length of the
screen has been used, it is taken off and washed
55 and smaller roll 6 is operated in any suitable or
and thoroughly cleaned, before it is put back in
on the inclined table 5, as shown.
i)
2.
9,109,647
the machine or apparatus thus provided for
coating the paper.
.
~
The screen may be made of wire of different
Cl
?brous portions of the paper.
' '
sizes, but preferably ?ne wire is employed, and
So far as the screen being stationary is con
it is found that screen of 120 mesh does satis
cerned, that is essential to the invention, it will
be seen, only during the frictional rotating ac
tion of the screen on the surface of the paper
or other sheet material. Therefore, by "station
factory work. It is also found that the size or
gauge of the wire approximately determines the
thickness of the coating left on the paper. In
Fig. 5, the wire is of larger gauge, with the re
10 sult that the coating i5 is thicker, whereas in
Fig. 6 the screen is of fine gauge wire, with the
result that the coating I5 is thinner. As shown
in Fig. 4, the ?lm of viscous liquid l6 travels up
wardly on the surface of the roll 8, during the
operation of actually coating the vpaper, is
squeezed through the screen ll against the paper
4, and emerges above the screen as the said coat
ing IS on the lower side of the paper. The lat
l
.
face, whereby the latter is smooth and glossy
and entirely free from any projecting hairy or
ary screen” is meant a screen which is stationary
while the coating material is being forced through 10
the screen onto the surface of the paper or other
sheet material. At other times the screen might
or might not have movement or motion, so far
as the broader aspects of the invention are con
cerned, but more speci?cally considered, as shown
and described, the screen does have motion when
ter can be taken out in any suitable or desired
not in use, in order to substitute a fresh sec
tion of the screen for a used section thereof.
What I claim as my invention is:
manner, as by feeding it into a belt ll, as shown
in Fig. 1 of the drawings.
It is important to observe that the wire screen,
1. In a machine for coating sheet material,
means to support the sheet material for motion,
a screen suitably supported to remain stationary
or a screen made of silk or any other porous ma
during the operation of the machine, a fountain
tcrial, of the proper mesh, is stationary during
the time that the viscous liquid is being squeezed
supply means for applying the more or less liq
uid material to the surface of the sheet material,
while the latter is moving, and means for exert
ing pressure through said fountain supply means
to force the screen against the surface of said
sheet, and to force the liquid through the screen
onto the sheet.
2. A structure as specified in claim 1, said
screen being ?exible, to facilitate the said forc
ing action, and being supported on rolls to per
mit a fresh section of the screen to be brought
into position for use, to take the place of the pre
through it on the under side of the paper.
This
is highly desirable, if not absolutely necessary,
for the reason that should the screen be per
mitted to travel in synchronism with the paper,
30 a stenciling effect on the latter would be the re
sult. However, by keeping the screen stationary,
the minute quantities of liquid, that are forced
through the screen onto the paper, are merged
uniformly into a continuous coating on the under
side of the paper, of uniform thickness, and the
surface of the coating becomes perfectly smooth
and even and free from streaks or undulations,
when the coating is ?nally dried.
Thus, the invention provides an apparatus for
40 applying liquids of different kinds, or substances
ceding used section. ,
3. A structure as speci?ed in claim 1, said foun
tain supply means comprising a roll for directly
engaging the screen, the latter being ?exible to
plerntit the said forcing thereof against the moving
of more or less liquidity or plasticity, to the sur
face of paper or other sheet material, in a more
satisfactory manner than was possible with cer
s
tain kinds of apparatus heretofore employed for
roll with means for holding the sheet on the cir
this purpose, inasmuch as the forcing of the
liquid or material through the proper screen,
which is stationary during the operation, insures
a more satisfactory product, with low cost of pro
duction.
It will be seen, therefore, that the invention
comprises a fountain supply means, in this case
in the form of a receptacle and a roller, for forc
ing the stationary screen against the revolving
sheet material, so that the latter is subjected to
cc .
4. A structure as speci?ed in claim 1, the means
for supporting the sheet material comprising a
cumference thereof.
5. A structure as speci?ed in claim 1, said sup
port for the sheet material being adapted to force
the sheet against said screen, whereby the latter
is squeezed tight between the sheet and the foun
tain supply means, and the moving sheet is
squeezed tight between its support and the screen,
while the latter remains stationary.
6. Apparatus for coating paper or other sheet
material, comprising a screen, supporting means
a rubbing effect on the screen, in a manner to pull
for holding the paper and frictionally rubbing the
the more or less liquid material through the inter
stices of the screen, so that the material will be
spread evenly and uniformly over the surface of
the paper or other sheet material. Preferably,
(H) as shown, both the receptacle ‘I and the roll 6
of the said fountain supply means are movable
up and down, to force the screen against the
paper, but it is obvious that the necessary or de
sired pressure can be provided by any suitable or
desired means, and the invention is not limited to
the exact construction shown and described.
surface of the sheet over one surface of said
screen, means for holding the screen in station
ary position for use, so that the screen and paper
With the viscous liquid material thus applied
under pressure, to the surface ofthe paper, it
is found that a much thicker or heavier viscous
liquid material can be used, than is ordinarily
possible, and that tiny or microscopic hairs or
portions of the ?ber that are ordinarily found
on the surface of the paper, are completely im
bedded below the surface of the coating and are
not allowed to remain projecting from said sur
have relative frictional sliding movement, while
the coating material is passing through the sta
tionary screen, and instrumentalities for apply
ing the material for the coating, in more or less
liquid or plastic condition, through the screen
from the other side of the latter to the surface
of the sheet, while the latter is traveling edge
wise on the screen.
7. A structure as speci?ed in claim 6, said sup
porting means comprising a cylindrical roll for
curving the paper on the surface thereof, so that
successive sections of the paper are brought suc 70
cessively into contact with the screen.
8. A structure as' speci?ed in claim 6, said in—
strumentalities comprising a roll arranged to ro
tate in the said material for the coating, to feed
the latter to the meshes of the screen.
76
3
2,109,647
9. A structure as specified in claim 6, said sup
porting means being above the screen, and said
instrumentalities being below the screen, so that
said material for the coating is forced upward
through the screen against the lower side of the
paper, said supporting means comprising a roll
for curving the paper on the surface thereof, so
that successive sections of the paper are brought
successively into contact with the screen, and
10 said bearing means comprising a roll for rubbing
said coating material against the lower side of
the screen.
10. A structure as speci?ed in claim 6, compris
ing means for intermittently feeding the screen
15 forward, thereby to bring a fresh section thereof
into position for use, after each coating operation.
11. In apparatus for giving paper or other sheet
material a coating of viscous liquid material, the
combination of means for movably supporting the
20 paper or other sheet material, in a manner to
resist pressure exerted against the paper, a sta
tionary screen uniformly engaging the moving
surface of the paper or other material, and means
for applying the liquid material through said
25 screen under pressure and friction to the surface
of the sheet material, while the latter is moving.
12. A structure as speci?ed in claim 11, the
means for applying the liquid material compris
ing a fountain supply having a rotating feed roller
30 for feeding and pressing the liquid material
through said screen upon the surface of the paper
or other sheet material.
13. A structure as speci?ed in claim 11, the
support for the paper comprising a rotary mem
35 ber having a cylindrical surface to receive the
paper or other sheet material, adapted to cause a
rubbing action against the coating while the lat
ter is being applied, together with means for
periodically moving fresh sections of the screen
-40 into position for stationary use.
14. A structure as speci?ed in claim 11, the
support for the paper comprising a rotary mem
ber having a cylindrical surface to receive the
paper or other sheet material, adapted to cause a
rubbing action of the screen against the paper 5
and coating while the latter is being applied
through the stationary screen.
15. Apparatus for coating paper with a viscous
liquid, comprising means for backing and sup
porting the paper in position to resist pressure 10
on the surface thereof, and perforate means hav
ing frictional engagement with the surface of the
paper to exert a rubbing action thereon, progres
sively along the surface thereof, for supplying and 15
rubbing liquid on the sheet under pressure, and
moving means for rubbing the liquid through said
perforate means onto the paper.
’
16. A structure as specified in claim 15, com
prising means for moving the sheet support dur
ing the coating operation, and means for holding
the said rubbing means relatively stationary, so
that the rubbing action is caused by the move
ment of the paper.
17. In apparatus for giving paper or other sheet 25'
material a coating of viscous liquid material, the
combination of means for supporting the paper or
other sheet material, in a manner to resist pres
sure exerted against the paper, and means in
cluding a screen uniformly engaging the surface 30
of the paper or other materiaL'for applying the
liquid material under pressure to the surface of
the paper or other sheet material, the means for
applying the liquid material comprising a fountain
supply having a rotating feed roller for feeding 85
and pressing the liquid material through said
screen uponthe surface of the paper or other
sheet material.
-
MOR'I'IMER 8. NORTH.
40
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