IMPROVEMENTS IN MACHINERY FOR 'BRONZING' OR OTHERWISE ORNAMENTING PAPER AND OTHER MATERIALS
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by James Salmon and Robert Philips at
the Office of the Commissioners of Patents on the 29th June 1880.
JAMES SALMON and ROBERT PHILIPS, both of the City of Manchester, in the
County of Lancaster, Printers' Engineers. "IMPROVEMENTS IN MACHINERY FOR
'BRONZING' OR OTHERWISE ORNAMENTING PAPER AND OTHER MATERIALS."
Our Invention relates to an improved modification of machinery for the abovo
named purpose, the subject of Letters Patent granted to John Siddons Grierson
and Robert Philips, No. 3100, A.D. 1869, and of Letters Patent granted to James
Salmon and John Brownbill, No. 2105, A.D. 1872.
Our Invention consists in an improved combination and arrangement of
mechanism. The paper or material, which has been previously printed in the
ordinary manner, is laid with the face or printed side down on an inclined feeding-
table or frame which has a series of rollers arranged in it so that they are quite
free to revolve. These rollers are covered with chamois leather or other suitable
material, and are cased in or enclosed except at their upper surfaces, and all of
them or the lowest in the series is dusted or supplied with the bronze or the
powder to be applied, so that as the sheet descends the printed parts may take up
some portion of the bronze or powder and thus, while these rollers prevent the
sheets from being smeared, the bronze or powder upon them prévents the varnish
from adhering to the surfaces of the rollers.
The sheets placed upon the rollers descend by their own gravity until the front
edge comes against a guard that is hinged to the feeding board or frame, which has
an oscillating up and down motion given to it by a cam, and when it rises the
hinged guard falls and allows the edge of the sheet to enter the grippers on a
cylinder which are at that time open, and then close upon it and carry it forward
against a roller on the lower side of the gripping cylinder, which roller rotates in a
box or trough containing the bronze or powder.
This roller is made to lift against the cylinder and then descend again, once in
every two revolutions of the gripping cylinder. After passing the bronzing roller
a cylindrical brush operates upon the sheet against the gripper cylinder, the
bristles acting in a contrary direction to that in which the sheet and gripper
cylinder is moving, and brushes off the superfluous bronze or powder, which falls
back on an incline conducting it to the box or trough.

page_text: The sheet is next carried by the gripper cylinder under an endless web or cloth
working on three rollers, one of which keeps the cloth in tension by regulating
.screws or by weights or springs.
The lower surface of this endless webb runs in contact with, but in an opposite
direction to, the gripper cylinder.
The web is or may be formed of plush or of a pile fabric known as imitation seal
skin or of any suitable material, or the web is or may be of any suitable material,
and have strips of velvet plush or any other suitable material secured or applied
across it with intervals between the strips.
The above named cylindrical brush acts upon this endless web as well as upon
the gripper cylinder to keep the acting surface of the web as free from bronze or
powder as possible, and there is also a second cylindrical brush to act up the
surface of the endless web to further assist in keeping it clean, and this second
brush is cased with a thin sheet of metal to keep the powder brushed off from
falling back again upon the endless web; and there is also a casing to keep the
powder from falling upon the first named cylindrical brush.
The sheet, after passing the endless web, then passes under a roller pressing it in
contact with the surface of the gripping cylinder, which roller draws it forward
with that cylinder against the action of the endless web, when the grippers open to
release the sheet after each second revolution; then small rotary brushes bring the
released edgo away from the surface of the cylinder so that it can be readily taken
away by the attendant.
The whole of the operating parts are boxed up or enclosed to prevent the powder
from flying about, except that there is an opening for feeding and taking away the
sheets.