Improvements in and relating to the Damping of Paper, Cloth, and like Surface Materials.
Year: 1893

page_text: Date of Application, 8th Apr., 1893
Complete Specification Left, 5th Jan., 1894-Accepted, 10th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Damping of Paper, Cloth, and
like Surface Materials.
I, SAMUEL MILNE of 3 Blackwood Crescent, Newington, in the City and
County of Edinburgh, Engineer, do hereby declare the nature of my invention to
be as follows:-
⚫ This invention has reference to and comprises a new or improved method or
system and arrangement and combination of appliances, for the damping or
spreading and saturating of paper, cloth and like surface materials with water
or other liquid in a more efficient manner than heretofore for use in connection
with printing, paper-making, or like machinery.
The improvements essentially consist in carrying a regulated quantity of water
or liquid on a web of wire cloth or other suitable fabric, and projecting it on to and
spreading it over the paper or other surface to be damped by means of a jet or
jets of compressed air or other fluid.
Under one arrangement the improvements would be carried into practice by
carrying an endless web or band of wire cloth or other suitable fabric material over
stretching and guide rollers, and through between a driving. roller and a lower
roller placed in a water or liquid trough. These two latter rollers would be
covered with sleeves of felt, índiarubber, or other equivalent soft or elastic
material, and the lower water roller would be driven by frictional contact with the
web of wire cloth passing under the driving roller; and these two rollers would be
made adjustable by lever, screw or equivalent mechanism, so that any desired
pressure can be brought to bear on the wire cloth while passing between these two
rollers. The water will thus be spread on to, the wire cloth from the trough by
the lower roller in any desired quantity as regulated by the speed of the cloth and
the pressure between the rollers.. A tube is mounted in position behind the
travelling web of wire cloth at any desired part between any of the rollers, and this
tube has a longitudinal slit formed through it, or a series of short slits formed in
longitudinal line, and compressed air is led to this tube which in issuing through
the narrow slit or slits will act on the water carried by the wire cloth, and pulverize
and project it on-to-the-paper or cloth surface to be damped.
COMPLETE SPECIFICATION.
Improvements in and relating to the Damping of Paper, Oloth, and
like Surface Materials.
I, SAMUEL MILNE, of 3 Blackwood Crescent, Newington, in the City and
County of Edinburgh, Engineer, 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 in writing, that is to say :-
This invention has reference to and comprises a new or improved method or
system and arrangement and combination of appliances for the damping or

page_text: spreading and saturating of paper, cloth, and like surface materials, with water
or other liquid in a more efficient manner than heretofore for use in connection with
printing, paper-making, or the like machinery.
The improvements essentially consist in carrying a regulated quantity of water
or liquid on a web of wire cloth or other suitable fabric, and projecting it on to and
spreading it over the paper or other surface to be damped by means of a jet or jets
of compressed air or other fluid.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood, I have hereunto
appended an explanatory sheet of drawings in which
Figure 1 is an elevation showing a diagram view of one preferable arrangement
and combination of appliances by which my improved method or system may be
carried into practice. And
Figure 2 is a detached transverse section to an enlarged scale of the compressed
air spraying tube.
Referring to these drawings:-Under this arrangement the improvements would
be carried into practice by carrying an endless web or band a of wire cloth or
other suitable fabric material over stretching and guide rollers A, A¹, and
through between a pressure roller B and a lower driven roller C, placed in a water
or liquid trough D. These two latter rollers B, C, would preferably be made of
brass or copper and be covered with sleeves of felt, or be formed of cast iron and
be covered with india-rubber or other equivalent soft or elastic material, and the
lower water roller C would be driven by belt or wheel gearing at a speed to suit
the quantity of water to be applied to the web of paper to be damped, and the
regulation is effected partly by varying in speed the wire cloth a in relation to the
web G to be damped. While further regulation may be effected by making these
two rollers B, C, adjustable by lever, screw or equivalent mechanism, so that any
desired pressure can be brought to bear preferably by the upper roller B on the
wire cloth a while passing between these two rollers B, C, and so allow more or
less water to pass with the wire cloth a according to the pressure applied. The
water will thus be spread on to the wire cloth a from the trough D by the lower
roller C in any desired quantity as regulated by the speed of the cloth and the
pressure between the rollers B, C. A tube E is mounted in position behind the
travelling web a of wire cloth at any desired part between any of the rollers, but
preferably between the rolls F, F', which flatten the wire cloth a at this part, and
this tube E has a longitudinal slit e formed through it, or a series of short slits
formed in longitudinal line, but preferably one slite having its width of opening
regulated by a series of screw bolts e, and compressed air is led from an air
compressor or blower to this tube E which on issuing through the narrow slit or
slits e will act on the water carried by the wire cloth a, and spray or pulverize and
project it on to the surface of the travelling web or sheet of paper or cloth G to be
damped.
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 :-
First. The method or system of damping paper, cloth, and like surface materials,
consisting in carrying a regulated quantity of water or liquid on a web of wire
cloth or other suitable material and projecting it on to and spreading it over the
paper or surface to be damped by means of a jet or jets of compressed air or other
pressure fluid, substantially as set forth.
Second. In a method or system of damping paper, cloth, and like surface
materials, the use of a travelling web of wire cloth or other suitable material for
carrying water or liquid, substantially as set forth.
Third. In a method or system of damping paper, cloth, and like surface materials,
use of a travelling web of wire cloth or other suitable material carrying water or
liquid in combination with a tube or organ supplying a jet or jets of compressed

page_text: air or other pressure fluid, to spray and project said liquid on to the surface to be
damped, substantially as set forth.
Fourth. In a method or system of damping paper, cloth, and like surface
materials, the arrangement and use of rotating and pressure regulating rolls, to
supply and regulate the quantity of water or liquid which shall be carried by a
travelling web of wire cloth or like material passing between said rolls, substantially
as set forth.
Fifth. In a method or system of damping paper, cloth and like surface materials,
the arrangement and combination of an endless travelling web of wire cloth or
other suitable material, liquid trough and supplying and pressure regulating rolls,
stretching and guide rolls, and air or fluid pressure spraying tube or organ,
substantially as herein described in reference to and by way of application shown
in the accompanying drawings.
Dated the 4th Tan 100
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.