A New or Improved Asbestos Matrix for Stereotypers.
Year: 1893

page_text: Date of Application, 11th May, 1893
Complete Specification Left. 17th May, 1893-Accepted, 24th June, 1893
PROVISIONAL SPECIFICATION.
A New or Improved Asbestos Matrix for Stereotypers.
I GEORGE HERBERT ADSHEAD of 2 Blythehill Lane Catford Mechanic do
hereby declare the nature of this invention to be as follows:-
My invention relates to a new or improved asbestos matrix for stereotypers, and
has for its object to remedy certain defects which the present process is subject to.
The ordinary matrix which is composed of alternative layers of paste and paper, after
being beaten or rolled upon the type requires to be dried, a process through which
much valuable time is lost. The object of this invention is to reduce this loss of
time to a minimum. In carrying my invention into practice I provide a sheet of
asbestos which is damped with spirit, the impression is then taken in the ordinary
manner. It is now only necessary to set light to the spirit which is burnt out in a
few seconds, and the matrix is ready to go to the casting box thus effecting a
considerable economy of time.
1
1000
F. G. CASSELL,
Of Cassell & Co.,
22, Glasshouse Street, London, Agent for the Applicant.
COMPLETE SPECIFICATION.
A New or Improved Asbestos Matrix for Stereotypers.
I GEORGE HERBERT ADSHEAD of. 2 Blythehill Lane, Catford Mechanic, 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:
My invention relates to a new or improved matrix for sterotypers, and has for its
object to provide a matrix which will be always ready for use, take a perfect
impression from which any number of castings may be taken, shall not be liable to
be broken and with which much better work can be done than with those hitherto
used.
In carrying my invention into practice, I take, to form the matrix, a sheet of
asbestos the surface of which may be calendered in order to render the same smooth,
this sheet is then damped with spirit, water, or other suitable liquid. It is now
placed upon the forme and beaten or rolled by means of a suitable machine in order
to press the asbestos into the type so that a perfect impression may be taken. It
is then necessary to dry the matrix, in order to do so, should spirit have been used
it is only required to set light to the same when the spirit is quickly burnt out,
should it however have been damped with water or other liquid it will be necessary
to dry same by placing it in a hot oven or upon hot sand or in any suitable manner.
When this process is completed the matrix is taken to the casting box and moulded
when any number of castings may be taken.
As the great aim of the stereotyper is to dry the matrix as quickly as possible,
it is obvious that by using this asbestos matrix damped with spirit which is after-
wards burnt out in a few seconds, a considerable saving of time is effected, the
matrix being now ready for use, but in the event of the matrix being damped with
water or other liquid, it requires to be dried as in the old process when it was built
up of alternate layers of paste and paper.
This matrix will keep for any length of time, and the tough nature of the

page_text: material employed allows any number of castings to be taken without running the
risk of the matrix being broken or the impression spoiled, which is frequently
the case with the method now in use, owing to the metal getting between the various
layers of material of which the matrix is composed.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is―
The new or improved asbestos matrix arranged, constructed, and operating
substantially as herein described.
1
1000
COCOT COOINT TO Consu
F. G. CASSELL,
Of Cassell & Co.,
22, Glasshouse Street, Regent Street, London,
Agent for the Applicant.