An Improved Method of Producing Rippled, Chequered, or other Patterns or Designs upon Rolled Plate and Sheet Glass and Apparatus therefor.
Year: 1887

page_text: Date of Application, 8th Mar., 1887
Complete Left, 8th Dec., 1887
Complete Accepted, 13th Jan., 1888
An Improved Method of Producing Rippled, Chequered, or other
Patterns or Designs upon Rolled Plate and Sheet Glass and
Apparatus therefor.
We, ANTHONY DIXON BROGAN and ANDREW MURRAY MALLOCH, both of Firhill
Glasgow in the County of Lanark, Glass Manufacturers, do hereby declare the nature
of this invention to be as follows:-
Under this invention we produce rippled, chequered, or other patterns or designs in
intaglio or in relievo upon rolled plate and sheet or window glass by subjecting plates
or sheets which have been rolled or blown and formed in the usual way to such heat
within a hot kiln as will reduce the glass to a plastic or semi-plastic state and then
traversing over the surface of the plate or sheet a heavy roller having engraved or
otherwise formed on it the counterpart of the pattern or design to be produced upon
the surface of the glass, the object being to overcome a difficulty which has been
experienced in attempting to roll molten or plastic glass upon a casting table by means
of such a roller owing to the glass being lifted and drawn in fine threads round the
roller by rough points and protuberances thereon.
The hot kiln is formed with a low roof or crown in order that the hot flame may be
directed evenly over the surface of the glass but sufficient space is left for the
admission within the kiln of the impressing roller which is hung upon cranks or
otherwise outside the kiln during the operation of heating the glass and is lowered
and run into the kiln over the glass while the heating flame may for the time being be
directed into a second kiln or by another course, a doorway being provided for the
entry of the roller. At the rear end of the kiln a slit is formed leading into an
annealing kiln into which the glass plate or sheet after being rolled over is pushed or
drawn and wherein it is permitted to stiffen.
Dated this Seventh day of March 1887
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.

page_text: COMPLETE SPECIFICATION.
An Improved Method of Producing Rippled, Chequered, or other
Patterns or Designs upon Rolled Plate and Sheet Glass and
Apparatus therefor.
We, ANTHONY DIXON BROGAN and ANDREW MURRAY MALLOCH both of Firhill,
Glasgow in the County of Lanark, Glass Manufacturers, 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:-
Under this invention we produce rippled, chequered or other patterns or designs in
intaglio or in relievo upon rolled plate and sheet or window glass by subjecting plates
or sheets which have been rolled or blown and formed in the usual way to such heat
within a hot kiln as will reduce the glass to a plastic or semi-plastic state and then
traversing over the surface of the plate or sheet a heavy roller having engraved or
otherwise formed on it the counterpart of the pattern or design to be produced upon
the surface of the glass the object being to overcome a difficulty which has been
experienced in attempting to roll and impress patterns on molten glass upon a casting
table by means of such a roller owing to the glass being lifted and drawn in fine
threads round the roller by rough points and protuberances thereon.
As represented in section at figure 1 and in front elevation at figure 2 of the
accompanying drawings the hot kiln is formed with a low roof or crown A in order
that the hot flame from the usual fire grates at B may be directed evenly over the
surface of the glass, but sufficient space is left for the admission within the kiln of the
impressing roller which may be hung upon cranks or otherwise outside the kiln or
placed in a recess or chamber at the forward end of the kiln during the operation of
heating or reheating the glass, the roller being run into the kiln over the glass while the
heating flame may for the time being be directed into a second kiln or by another
course. A doorway at D is provided for the entry of the roller C which in order that
sufficient pressure may be applied to the surface of the glass in the rolling operation
without using a roller of large diameter, has suspended to its ends by rods E heavy
weights F, channels G being formed in the brickwork of the kiln for the passage of
the rods and weights when the roller is traversed over the glass on the floor H. of the
kiln. A forked bar or frame I engaging the ends of the roller and extending out
through the front doorway of the kiln is employed for traversing the roller over the
glass. At the rear end of the kiln a slit or opening J is formed leading into a lear or
annealing kiln into which the glass plate or sheet after being rolled over is pushed or
drawn and wherein it is permitted to stiffen, lifting and drawing bars such as are
commonly used in glass manufacture being preferably employed for transferring the
rolled glass from the bot kiln to the lear or annealing kiln.
In dealing with rolled plate the glass is preferably taken direct from the casting
table after being rolled and whilst still hot and in the case of blown glass the glass

page_text: cylinder when split is taken whilst hot and laid in the hot kiln or flattening kiln and
therein subjected to the action of the impressing roller as above described.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what we
claim is
1. The method herein before described of producing patterns or designs upon rolled
plate or sheet glass by subjecting it to heat in a hot kiln to bring it to a plastic or
semi-plastic state and traversing an impressing roller over the surface of the plastic or
semiplastic glass substantially as set forth.
2. In conjunction with a hot kiln for reheating rolled plate or sheet glass an
impressing roller adapted to be traversed over the floor of the kiln to produce patterns
or designs on the surface of the glass substantially as described.
Dated this Seventh day of December 1887.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.