A NEW OR IMPROVED METHOD OR PROCESS OF PRODUCING ARCHITECTURAL ORNAMENTS, PAPERHANGINGS, CEILINGS, AND OTHER OBJECTS OF DECORATION COMP OECTS OF DECORATION OR UTILITY IN HOLLOW RELIEF FROM RAG, WOOD, OR OTHER SIMILAR PULP, COMBINED OR NOT WITH CERTAIN OTHER MATERIALS
Year: 1881

page_text: LETTERS PATENT to Lorentz Albert Groth, K.G.V., Civil Engineer and
Proprietor of the Scandinavian Patent Office, 97, Finsbury Pavement, London,
E.C., and 20, Forhaabningsholm Allee, Copenhagen, for an Invention of
LETTERS PATENT to Lorentz Albert Groth, K.G.V., Civil Engineer and
Proprietor of the Scandinavian Patent Office, 97, Finsbury Pavement, London,
E.C., and 20, Forhaabningsholm Allee, Copenhagen, for an Invention of
"A NEW OR IMPROVED METHOD OR PROCESS OF PRODUCING ARCHITECTURAL
ORNAMENTS, PAPERHANGINGS, CEILINGS, AND OTHER OBJECTS OF DECORATION
COMPLETE SPECIFICATION filed by the said Lorentz Albert Groth at the
Office of the Commissioners of Patents on the 12th January 1881.
LORENTZ ALBERT GROTH, K.G.V., Civil Engineer and Proprietor of the Scandinavian
Patent Office, under the Firm of L. A. Groth & Co., 97, Finsbury Pavement,
London, & 20, Forhaabningsholm Allee, Copenhagen. "A NEW OR IMPROVED
METHOD OR PROCESS OF PRODUCING ARCHITECTURAL ORNAMENTS, PAPER
HANGINGS, CEILINGS, AND OTHER OBJECTS OF DECORATION OR UTILITY IN
HOLLOW RELIEF FROM RAG, WOOD, OR OTHER SIMILAR PULP, COMBINED OR NOT
WITH CERTAIN OTHER MATERIALS."
The method of manufacture is as follows :-
100 pounds of rag, wood, or other similar pulp are reduced in hot water of from
50° to 60° centigrade to a pulpy mass; whilst continually stirring this mass there
may be added thereto about 5.50 pounds of finely pulverized chalk, yellow ockre,
umber, or bone black according to the required color and firmness of the object to
be formed.
When the mass is sufficiently cooled it is pressed into wooden, mettallic, plaster
of Paris, sulphur, gutta percha, or other suitable open moulds in such manner that
the object to be formed shall be as nearly as possible of the same thickness throughout,
and for this purpose I prefer to press the material into the mould by hand without
the intervention of any counter part to the said mould. The moulds are then
covered with several layers of coarse canvas or sacking, which being pressed by

page_text: t
hand or otherwise against the moulded material removes the superfluous water
therefrom, and the said material receives the proper cohesion and firmness.
The pressed objects with their moulds are then placed to dry in a suitably
arranged drying room, and when sufficiently dry they are removed from the
moulds and coated with a solution of gum-lac in alcohol or other suitable varnish
in order to give them a strong and durable surface. This method of producing
ornaments and such like objects possesses a great advantage over the ordinary
manufacture from plaster of Paris, papier mâché, or crayon ornamentation. Objects
made in accordance with this Invention can easily be applied to existing cornices in
mortar, plaster of Paris, or wood of any form or kind, and are applicable by reason
of their extreme lightness and tenacity in many cases where it would be impossible
to employ plaster of Paris, for example, on ceilings or walls coated with stretched
canvas. Such ornaments are also cheaper than similar work produced in carved
wood, plaster of Paris, and such like.
It will be understood that in the above described method of producing orna-
ments and such like objects no special machinery or apparatus is required, the whole
operation being performed by hand; but if preferred; instead of removing the
moisture from the material in the moulds by hand pressure exerted upon the
thicknesses of canvas or sacking, suitable mechanical pressing apparatus may be
employed.
Having now described the nature of the said Invention, and the manner in
which the same is to or may be performed, I would have it understood that I do
not claim generally the. moulding of pulp with or without other substances into
ornamental forms, as the same has long been known and practised, but what I do
claim is,
The manufacture and use of architectural ornaments, paper hangings, ceilings,
and other objects of decoration or utility in hollow relief from rag, wood, or other
similar pulp combined or not with the other materials hereinbefore specified by the
method or process described in the foregoing Specification.
In witness whereof, I, the said Lorentz Albert Groth, have hereunto.set
my hand and seal, this Twelfth day of January, in the year of our Lord
One thousand eight hundred and eighty one.