Improvements in Apparatus for Applying Bronze or other Powder to the Surface of Paper or other Material.
Year: 1887

page_text: Date of Application, 28th Mar., 1887
Complete Left, 23rd Dec., 1887
Complete Accepted, 3rd Feb.. 1888
Improvements in Apparatus for Applying Bronze or other Powder
to the Surface of Paper or other Material.
I, WILLIAM BREWER SILVERLOCK, of Blackfriars Road in the County of Surrey,
Printer, do hereby declare the nature of this invention to be as follows:-
My present invention relates to apparatus used for applying bronze or other powder
to designs prepared upon the surface of paper or other material. It is applicable
more especially to the apparatus for which I obtained Letters Patent dated June 20th
A.D. 1885 and numbered 7547, but it may also be applied to other apparatus for
similar purposes.
In such machines it is usual to employ a roller covered with a suitable material,
which is made to revolve in a trough or vessel containing the bronze or other powder,
so that as the roller revolves it takes up some of the powder and transfers it to the
surface of the paper or other material to which it is to be applied.
It is of importance that the trough or vessel should be kept supplied with the
powder, and also that the latter should be prevented from caking together and
adhering to the sides of the trough so that the roller revolves inside without taking
it up.
In order to feed the bronze or other powder regularly, evenly, and uniformly, into
the trough or vessel, I arrange above one side of the latter, a hopper of as great a
length as the vessel, and in this hopper I arrange a roller the axis of which turns in
bearings at the end of the hopper. This roller is made to revolve continually or
intermittently at any desired speed and its surface is covered with plush, artificial
sealskin or other material of sufficiently long pile to which, as the roller revolves, the
bronze or other powder in the hopper adheres. I arrange a flat plate or strip
preferably of metal, parallel with the roller in such a position that its edge just touches
the pile of the material which covers the roller, bending it back and then releasing it
as it passes so as to scatter the powder uniformly into the trough below or upon the
roller in the trough, or upon the material to which it is to be applied.
The position of the flat strip is preferably made adjustable.

page_text: In this way the powder is uniformly distributed to the trough or vessel below and
to the bronzing roller of the machine.
In order to prevent the bronze or other powder from caking and adhering to the
sides of the trough in which the rollers revolve, I arrange in the trough a longitudinal
bar or rod parallel with the roller, and having its ends passing through openings or
guides in the ends of the trough, so that it can be made to move longitudinally back-
ward and forward for a short distance. At intervals along this bar I fix to it scrapers
or rakes which fit against the side and bottom of the trough, between the latter and
the roller.
The bar together with the scrapers is made to reciprocate backward and forward
either continuously or at intervals by means of a crank, cam, or other equivalent
device, actuated in any convenient manner.
By this means the bronze or other powder, is continually detached from the trough
and mixed and is left for the roller to operate upon and take up. The rakes may also,
sometimes, be made just to touch the surface of the material which covers the roller.
The stroke backward and forward should be somewhat greater than the distance
between each two scrapers.
Th: 00:1
1. 1007

page_text: Improvements in Apparatus for Applying Bronze or other Powder
to the Surface of Paper or other Material.
I, WILLIAM BREWER SILVERLOCK, of Blackfriars Road, in the County of Surrey,
Printer, do hereby declare the nature of this invention and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement and accompanying drawing, (that is to say) :—
My present invention relates to apparatus used for applying bronze or other powder
to designs prepared upon the surface of paper or other material. It is applicable
more especially to the apparatus for which I obtained Letters Patent dated June 20th
A.D. 1885 and numbered 7547 but it may also be applied to other apparatus used for
similar purposes.
In such machines it is usual to employ a roller covered with a suitable material,
which is made to revolve in a trough or vessel containing the bronze or other powder,
so that as the roller revolves it takes up some of the powder and transfers it to the
surface of the paper or other material to which it is to be applied. It is of importance
that the trough or vessel should be kept supplied with the powder and also that the
latter should be prevented from caking together and adhering to the sides of the
trough so that the roller revolves inside without taking it up.
In order to feed the bronze or other powder regularly, evenly, and uniformly, into
the trough or vessel, or upon the paper or other material to which it is to be applied,
I arrange in a suitable position, preferably above one side of the trough, a hopper of
as great a length as the vessel, and in this hopper I arrange a roller the axis of which
turns in bearings at the end of the hopper. This roller is made to revolve continuously
or intermittently at any desired speed, and its surface is covered with plush, artificial
sealskin or other material having a sufficiently long pile, or with brushes, to which as
the roller revolves, the bronze or other powder in the hopper adheres. I arrange a
flat plate or strip preferably of metal, parallel with the roller in such a position that
its edge just touches the pile of the material which covers the roller, bending it back
and then releasing it as passes so as to scatter the powder uniformly into the trough
below, or upon the distributing roller in the trough, or upon the material to which the
powder is to be applied. The position of the flat strip is preferably made adjustable.
In this way the powder is uniformly distributed to the trough or vessel below and to
the bronzing roller of the machine.
In the accompanying drawing, which is in illustration of my invention, figure 1 is
a transverse section through the hopper containing the bronze or other powder, and
figure 2 is a plan of the same.
a is the hopper, containing the roller b covered with plush or other material, or
with brushes as described. c is the flat plate or strip against which the ends of the
pile or of the brushes are bent back and on being released scatter and distribute the
powder (as shewn in figure 1) upon the distributing roller or upon the paper or other
material.

page_text: Instead of one plate or strip e two or more may be used, as shown in figures 3
and 4 and in the lower part of figure 2, and they may be strengthened by transverse
plates or wires so as to form a grating or network.
The speed of revolution of the roller b may be made variable as may be desired.
In order to prevent the bronze or other powder from caking and adhering to the
sides of the trough in which the roller revolves, I sometimes arrange in the trough a
longitudinal bar or rod parallel with the roller, and having its ends passing through
openings or guides in the ends of the trough, so that it can be made to move
longitudinally backward and forward for a short distance. At intervals along this
bar I fix to it scrapers or rakes which fit against the side and bottom of the trough,
between the latter and the roller.
The bar together with the scrapers is made to reciprocate backward and forward
either continuously or at intervals by means of a crank, cam, or other equivalent
device, actuated in any convenient manner.
This arrangement is illustrated in plan in figure 5 and in transverse section in
figure 6. d is the trough containing the distributing roller e, covered with suitable
material, is a longitudinal bar made to reciprocate backward and forward by any
suitable means (not shewn in the drawing), and 9, 9, 9, are the scrapers carried by
the bar f.
By this means the bronze or other powder, is continually detached by the scrapers g
from the trough and mixed and is left for the roller e to operate upon and take up.
The rakes may also, sometimes, he made just to touch the surface of the material
which covers the roller. The stroke backward and forward should be somewhat greater
than the distance between each two scrapers.
I do not confine myself to any precise form, proportions, or imaterials of the different
parts of the improved apparatus, which may be varied more or less according to the
circumstances and conditions under which the apparatus is to be used, and the kind
of machine to which it is to be applied, but 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 :-
1. The method of uniformly supplying bronze or other powder in the required
quantity to the distributing roller or trough, or to the surface of paper or other
material, by means of a roller, revolving at a suitable speed in a hopper, and distributing
the powder over or between one or more bars or strips, substantially as and for the
purpose described and shewn in the drawing.
2. The method of preventing the bronze or other powder from adhering to the sides
of the trough in which the distributing roller works, by means of reciprocating
scrapers, substantially as described and shewn in figures 5 and 6.
Int
100
1007
VELGER OUT HUCK
EDWARDS & Co.,
35, Southampton Buildings, London, W.C.,
Agents for the Inventor.