A New Plastic Composition for and Improvements in the Manufacture of Bobbins, Tool-handles, and the like.
Year: 1892

page_text: Date of Application, 18th Aug., 1892-Accepted, 24th Sept., 1892
COMPLETE SPECIFICATION.
A New Plastic Composition for and Improvements in the
Manufacture of Bobbins, Tool-handles, and the like.
I, HERMANN SECKELSON, of Kurstrasse 32, Berlin in the Kingdom of Prussia
and German Empire, Manufacturer, do hereby declare the nature of this inven-
tion, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
For some time past, bobbins, tool-handles, and other articles have been made
from compositions including paper and paper waste as an ingredient, but hitherto,
when plaster of paris, clay, and similar substances have also been used as
ingredients, their manufacture has not been successful, because the articles
produced have been heavier than desirable and soon become warped or shew cracks
after drying.
The present invention relates to an improved method of manufacture, according
to which paper or paper waste, in powder, and china clay, plaster of paris, whiting,
or similar substances in powder, are mixed together with a sufficiency of ordinary
paste, in the cold state, to form a pulp or plastic compound which may be moulded
or pressed to the required form. The articles so produced are dried at ordinary
temperatures and are then exposed to a gradually increasing heat until they are.
perfectly dry and hard.
Very good results may be obtained by mixing together three parts of china clay
and two parts of powdered paper. The combined powders are then intimately
ground or mixed with enough flour paste to form a pulp or plastic mass of a suitable
consistency, which is pressed in moulds to form the desired articles.
Upon the removal of the articles from the mould, they are dried in the open air
until their surfaces appear to be quite dry. This will take from 24 to 36 hours
according to the hygroscopic condition of the atmosphere. The surface dried
articles are then exposed to a gradually increasing heat in a suitable oven until they
are perfectly dry, the highest degree of heat employed being insufficient to cause
charring or deterioration.
"Any roughness on the surface of the articles may be readily removed by a brief
application to an emery wheel, and a finishing polish may be obtained by friction
with a woollen cloth.
Articles produced as hereinbefore described are scarcely distinguishable from
finely polished wooden articles, and will have equal durability and similar weight,
whilst costing scarcely half as much.
Pigments may be added to the powders to produce any desired tint, or the finished
articles may be stained.
In the example given, plaster of paris, or whiting may be substituted for the
china clay.
The finished articles do not warp nor shew cracks after drying.
Having now particularly described and ascertained the nature of my said inven-.
tion and in what manner the same is to be performed, I declare that what I
claim is:-
The hereinbefore described method of manufacturing bobbins, tool-handles, and
other articles from a composition including paper or paper waste, substantially as
hereinbefore described.
Dated this 16th day of August A.D. 1892
T
TA
TINYA
HAM E. HEYS,
Agent for the Applicant.