IMPROVEMENTS IN OBTAINING PRINTING AND OTHER SURFACES to be as follows:
Year: 1884

page_text: I DUNCAN CAMPBELL DALLAS of 12 Crane Court Fleet Street in the City of
London Engraver and Printer do hereby declare the nature of my invention for
"IMPROVEMENTS
IN OBTAINING PRINTING AND OTHER SURFACES to be as
follows:-
"
My improvements have for their object the production of drawings or designs
upon metal and other suitable surfaces by means of a heated pen of the character
described in the Specification of Letters Patent granted to John Henry Johnson
dated 9th May 1881 N° 2016 and in the Provisional Specification of a Patent now
being applied for by William Henry Dalton dated 26th February 1884 N° 3985
both inventions being Communications from Samuel Henry Crocker late of Railton
Tasmania but now of Melbourne Victoria Australia Mechanical Engineer.
According to my improvements printing and decorative surfaces are produced
without the process of etching by the use of acids or other etching solutions and in
carrying my improvements into practice a drawing or design is made on metal or
other suitable surfaces by means of the hot pen charged with wax or other suitable
material the surface on which the Drawing is made being a conductor of electricity
or capable of being made so.
When the Drawing is complete the surface is rendered conducting by any of the
well known means which will not injure the Drawing viz: by coating with
plumbago-copper or other suitable metallic bronze powders or solutions-After a
sufficiently thick deposit of metal has been made upon the Drawing the surfaces
are separated and after being properly prepared for the purpose it can be printed
from after the manner of copper plate printing or used for any purpose to which
intaglio designs can be applied such as for rollers for calico printing, dies and
surfaces for embossing, plates for pottery decoration, Goldsmith's work, furniture
plaques and other artistic work.
In place of depositing metal upon the original Drawing from the hot pen casts
may be taken therefrom in plaster of Paris or other suitable material which can
be employed either for stereoty ping printing or for decorative or other artistic
purposes.
TONGUE & BIRKBECK,
34, Southampton Buildings,
Agents for the Applicant.

page_text: "
I DUNCAN CAMPBELL DALLAS of 12 Crane Court Fleet Street in the City of
London Engraver and Printer do hereby declare the nature of my invention for
"IMPROVEMENTS IN OBTAINING PRINTING AND OTHER SURFACES' and in what.
manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
My improvements have for their object the production of drawings or designs
upon metal and other suitable surfaces by means of a heated pen of the character
described in the specification of Letters Patent granted to John Henry Johnson
dated 9th May 1881 N° 2016 and in the specification of a Patent now being applied.
for by William Henry Dalton dated 26th February 1884 N° 3985 both inventions
being communications from Samuel Henry Crocker late of Railton Tasmania but
now of Melbourne Victoria Australia Mechanical Engineer.
According to my improvements printing and decorative surfaces are produced
without the process of etching by the use of acids or other etching solutions and
in carrying my improvements into practice a drawing or design is made on metal
or other suitable surfaces by means of the hot pen charged with wax or other
suitable material the surface on which the drawing is made being a conductor of
electricity or capable of being made so.
When the Drawing is complete the surface is rendered conducting by any of the
well known means which will not injure the Drawing, viz, by coating with
plumbago, copper or other suitable metallic bronze powders or solutions. After a
sufficiently thick deposit of metal has heen made upon the Drawing the surfaces are
separated and after being properly prepared for the purpose it can be printed from
after the manner of copper plate printing or used for any purpose to which intaglio
designs can be applied such as for rollers for calico printing, dies and surfaces for
embossing, plates for pottery decoration, Goldsmiths' work, furniture plaques and
other artistic work.
In place of depositing metal upon the original drawing made by means of the
hot pen casts may be taken therefrom in plaster of Paris or other suitable material
which can be employed either for stereotyping printing or for decorative or other
artistic purposes either in intaglio or relief.
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 I make
no claim separately to the use of the hot pen but what I claim is
The new or improved means of converting drawings made upon metal or other
suitable surface by means of the hot pen into intaglio or relief surfaces for printing
or for decorative or other artistic purposes substantially in the manner herein before
described.
Dated this 6th day of Fahru 1885