Improvements in Paper Coating Machines.
Year: 1899

page_text: Date of Application, 24th Oct., 1899-Accepted, 27th Jan., 1900
Improvements in Paper Coating Machines.
I, WILLIAM HUBELI WALDRON, Manufacturer, of 25, Livingston Avenue, New
Brunswick, in the County of Middlesex and State of New Jersey, United States
of America, do hereby declare the nature of my invention, and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:
The object of the invention is to provide a new and improved coating machine,
preferably arranged as an adjunct to a paper making machine of any approved
construction, but adapted to be used separately from the paper making machine
if desired, said coating machine being constructed to properly coat or ground the
paper on one or both faces, in a very simple and economical manner.
The invention consists of novel features and parts and combinations of the
same, as will be fully described hereinafter and then pointed out in the claims.
A practical embodiment of my invention is represented in the accompanying
drawings forming a part of this specification, in which similar characters of
reference indicate corresponding parts in all the views.
Figure 1 is a sectional side elevation of the improvement;
Figure 2 is a plan view of one end of the machine;
Figure 3 is an end elevation of the same;
Figure 4 is a sectional side elevation of a modified form of drawing device:
for the paper:
Figure is a side elevation of the improvement, with the color delivery
devices in the form of aprons in contact with a roller in the color pan; and
Figure 6 is a sectional side elevation of another modified form of the improve-
ment, showing the turning over and the color delivery devices disposed differently
from the arrangement shown in Figure 5.
In the form shown in Figures 1, 2 and 3, the paper A unwinds from a roll B
and passes upward and over a guide roller C, and over the first color delivery
device, preferably in the form of a coating roller D, the lower portion of which
extends into the pigment contained in a color pan E, said coating roller D being
preferably covered at its peripheral surface with a suitable fabric, for delivering
the pigment to the under side of the paper, the latter contacting by its own
weight with the top surface of said roller D, to insure a proper and uniform
delivery of the pigment or color to the paper. The paper after leaving the
coating roller 1 passes to and over an angularly-disposed roller F, for- turning
the paper completely over, the paper then passing from this turn-over roller F
over a second color delivery device, similar to the first-named color delivery
device, and likewise having a coating roller D¹, the lower portion of which
extends into a color pan E.
It will be seen that by the arrangement described, the paper in its forward
travel is first coated on the underside with a pigment delivered by the coating-
roller D, and then the other side is coated by the coating-roller D as the paper
is turned over between the two coating rollers 1 and D¹. It is expressly
understood that the paper, by its own weight, passes in contact with the two
coating rollers D, D₁, to be properly coated, for the reason above given.

page_text: By reference to the drawings, it will be seen that the paper while passing
from the roller Cover the coating roller D to the under side of the turn-over
roller F; extends in a horizontal plane, and that portion of the paper passing
from the top of the turn-over roller F, over the coating roller D and under a
guide-roller G, likewise extends in a horizontal plane, so that the pigments are
uniformly distributed on both sides of the paper. The paper after leaving the
guide-roller G passes between two rollers H, H¹, for squeezing out the surplus
pigment on the paper, said surplus material passing back into the pan E which
is sufficiently extended under said rollers to receive the surplus pigment. See
Figure 1.
After the paper leaves the rollers H, H¹ it passes under a roller I and over a
brush J; and then it passes over a roller I and under a brush J', to insure a
proper wiping of the colors or pigments into the pores of the paper. The paper
then extends between a series of top and bottom brushes K, K and over a pair of
rollers L, to finally pass between two drawing rollers N, N¹ rotated from suitable
machinery, for imparting a forward travelling motion to the paper in the direc-
tion of the arrow a¹. Between the series of brushes K and the drawing rollers
N, N are arranged fans O driven by suitable means, for drying the coated or
ground paper to a desired degree, before passing from the drawing rollers N, N¹
to what is known as a lathing machine P consisting of endless carrier chains
carrying spaced sticks and thence to a drying rack Q, for hanging the paper up
in festoons for a final drying.
Instead of using a pair of drawing rollers N, N¹, as shown in Figure 1, I may
employ a perforated hollow cylinder N³, see Figure 4, connected with a suitable
exhaust device, for drawing the air out of the cylinder and causing the paper to
adhere to the peripheral surface thereof by suction. I do not, however, limit
myself to any particular construction of drawing device, or fans for drying the
paper, as other suitable means may be employed to dry the paper intermediate
of the brushes K and the drawing device N.
In the modified form shown in Figure 5, the color delivery devices D2, D3 are
both arranged on the top of the paper, that is, one over one face of the paper,
and the other over the other face, the angular turning-over roller being
intermediate of said delivery devices. Each of the latter is, in this case, formed
with an apron D, the lower edge of which reaches across and over the paper,
the upper end being in contact with the peripheral surface of the roller D,
extending with its lower portion into the color pan E, so that when the roller is
rotated it delivers the color to the apron, the color then flowing by its own
gravity down the apron upon the face of the paper travelling below the apron.
As indicated in Figure 6, the turn-over roller F is arranged transversely
parallel with the rollers in the apron delivery devices, 16, 17 one of the latter
being located over the lower run of the paper A¹, and the other over the upper
run of the paper, so that both faces of the paper receive the color or pigment
when the machine is in operation. As shown in said Figure 6, the delivery
devices are located one above the other, the turning over roller being intermediate
of said devices.
The roller is preferably felt covered and becomes saturated with the color
from the paper delivered by the first device D6, but this saturated roller instead
of being a detriment to the proper coating of the paper, assists in a proper
distribution of the color should the latter be delivered in unequal quantities by
the apron of the device Do.
The rollers I, I, brushes J, J, K, K and fans O may be of any approved
construction. The aprons D are preferably made of sheet metal, but other
material may be employed.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
-

page_text: color delivery devices for the purpose of turning the travelling paper over after
it has passed one color delivery device and has received color therefrom on one
face, to present the other uncoated face of the paper to the other colour delivery
device to be coated thereby, substantially as shown and described.
2. The arrangement as claimed under head one, with the colour delivery
devices in the form of coating rollers arranged at angles to each other and the
turning roller disposed angularly relative to the coating rollers.
3. The arrangement as claimed under head one, with the colour delivery
devices in the form of aprons receiving the color from a roller in a color pan.
Dated this 24th day of October 1899.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.