IMPROVEMENTS IN STEREOTYPING
Year: 1879

page_text: LETTERS PATENT to William Pollard Byles, Newspaper Proprietor, and George
Allan, Printer's Manager, both of Bradford, in the County of York, for the
Invention of "IMPROVEMENTS IN STEREOTYPING."
PROVISIONAL SPECIFICATION left by the said William Pollard Byles and
George Allan at the Office of the Commissioners of Patent's on the 24th
September 1879.
WILLIAM POLLARD BYLES, Newspaper Proprietor, and GEORGE ALLAN, Printer's
Manager, both of Bradford, in the County of York. "IMPROVEMENTS IN STEREO.
TYPING.
The object of this Invention is to obtain the matrix in its dry state ready for
casting without subjecting the type to a high temperature and in a shorter space
of time. Hitherto the prepared paper for the matrix is laid upon the type in a
moist state, subjected to pressure, and then the whole, i.e., the matrix and type, is
subjected to a high temperature. This temperature has the effect of damaging the
type by expansion and contraction.
By our improved method the prepared paper is laid upon the type and
immediately the necessary impression has been taken, it is removed from the type
and subjected to a high temperature.

page_text: ".
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said. William Pollard Byles and George Allan in the Great Seal Patent
Office on the 25th February 1880.
WILLIAM POLLARD BYLES, Newspaper Proprietor, and GEORGE ALLAN, Printer's
Manager, both of Bradford, in the County of York. "IMPROVEMENTS IN STEREO-
TYPING.
The object of this Invention is to obtain the matrix in its dry state ready for
casting without subjecting the type to a high temperature and in a shorter space
of time. Hitherto the prepared paper for the matrix is laid upon the type in a
moist state, subjected to pressure, and then the whole, that is to say, the matrix and
type, are subjected to a high temperature. This temperature has the effect of
damaging the type by expansion and contraction.
By our improved method the prepared paper is laid upon the type, and
immediately the necessary impression has been taken it is removed from the type
and subjected to a high temperature.
The modus operandi is somewhat as follows: The matrix or flong is placed
upon the type and an impression taken in the ordinary manner. The matrix or
mould is then removed from off the type and put upon a tray which may be made
curved or flat, and be perforated or otherwise. When put upon a curved tray the
matrix or mould is held in position by suitable clips, and when placed upon a
flat tray the matrix is held on the same by suitable weights. When the matrix is
adjusted on the curved or flat tray, the tray and matrix are placed into a hot
chamber in order to dry the latter ready for casting the stereotype.
The hot chamber may be heated by means of the surplus heat from the metal pot
fire to such a degree that the heat surrounding the suspended tray and matrix in
the hot chamber dries the matrix in a short space of time, and the steam arising
therefrom passes through a pipe secured in the top of the hot chamber to the
atmosphere, or into the chimney flue as desired.
In case there is not sufficient heat passing from the metal pot fire to dry the
matrix as quickly as is desired, we place in the bottom of the hot chamber
underneath a metal plate one or more Bunsen's gas burners to supplement the heat
in the chamber.
In order that our Invention may be clearly understood. we have appended a
Sheet of Drawings shewing how our improved method of drying the matrix may be
carried into effect.
Figure 1 represents a sectional elevation through line A, B, of a double hot
chamber connected to the metal pot fire. Figure 2 is a sectional plan of the same
through C, D. Figure 3 is a transverse section through line E, F. Figures 4 and 5
represent the end view and plan of curved perforated tray, which is enlarged to
better illustrate the same. Figure 6 is an end view of curved tray shewing the
clips fitted on the convex side of tray.
د
The metal pot is indicated by the letter G and the hot chambers by H, H, which
are enclosed within brickwork J, except the fronts which are fitted with ordinary
doors. The heat from the metal pot fire K passes through the flues L round the
hot chambers, past the damper M to the flue N leading to the chimney, as indicated
by the arrows. The damp matrix after receiving the necessary impression is placed
upon a tray, which may be flat or curved and be perforated or otherwise. The
damp matrix can be placed upon the convex or concave sides of the tray P and held
in position by clips R arranged on the convex or concave sides of the tray, as the
case may be; the matrix is then ready for drying and is placed inside the
chamber H, the flanges of the tray P resting upon the flanges S at each side of the
chamber; thus the tray and matrix are suspended in hot air which dries the latter,

page_text: and the steam arising from the damp matrix passes out through the pipe T to the
atmosphere or into the chimney flue.
When the heat from the fire K is not sufficient to dry the matrix quickly, we
place one or more Bunsen's gas burners under the movable plate U, and thus
supplement the heat in the hot chamber.
We can also construct the hot chamber somewhat different from the one described
and illustrated. We form a casing of metal similar to the one illustrated, but
without the top plate Y, which may be covered or not by a loose lid; the tray and
matrix are placed inside the chamber and rest upon projections or flanges, as before
described. Thus they are suspended in the hot air of the chamber and by this
means the matrix is dried. In this case we require no brickwork or external flues,
but obtain the heat by means of Bunsen's gas burners placed at the bottom of the
chamber, as before described.
Having now described the nature and object of our said Invention together with
the manner in which the same may be carried into effect, we would have it
understood that what we claim is,―
The drying of the matrix separate from the type upon a flat or curved tray
suspended in a heated chamber, substantially as hereinbefore described and illustrated
by the accompanying Drawings.
In witness whereof, we, the said William Pollard Byles and George Allan,
have hereunto set our hands and seals, this Nineteenth day of February,
in the year of our Lord, One thousand eight hundred and eighty.
25 Witness,
JOHN GILL,
WILLIAM POLLARD BYLES. (L.S.)
GEORGE ALLAN.
(L.S.)
Clerk to John Waugh,
Engineer and Patent Agent,
Bradford.