IMPROVEMENTS IN HOTPLATES FOR PRESSES
Year: 1880

page_text: LETTERS PATENT to Friedrich Carl Glaser, of Berlin, in the Kingdom of
Prussia and Empire of Germany, Engineer and Patent Solicitor, for an
Invention of "IMPROVEMENTS IN HOTPLATES FOR PRESSES." A communi-
cation by Rudolf Dinnendahl, of Crefeld, in the German Empire.
PROVISIONAL SPECIFICATION left by the said Friedrich Carl Glaser at the
Office of the Commissioners of Patents on the 22nd September 1880.
FRIEDRICH CARL GLASER, of Berlin, in the Kingdom of Prussia and Empire
of Germany, Engineer and Patent Solicitor. "IMPROVEMENTS IN HOTPLATES FOR
PRESSES." [A communication by Rudolf Dinnendahl, of Crefeld, in the German
Empire.]
This Invention has reference to plates used in presses that are heated internally
by steam or other fluids, such plates being more particularly used in the dressing
of textile fabrics. Such plates have heretofore either been made of cast iron, or of
rivetted wrought iron, and have consequently soon become defective. According
to the present Invention such plates are made of a more durable nature either by
welding together the several parts of wrought iron or steel composing them, as will
he presently described, or by producing the requisite passages in a solid slab of
metal by boring. Figs. 1 and 2 of the accompanying Drawing shew respectively in
sectional plan and longitudinal section one mode of constructing such hot plates
according to the first described plan. A wrought iron or steel flat bar & is bent
into serpentine form as shewn, and after welding, the one end thereof to the
surrounding rim, both parts are then welded together with the top and bottom
plates. I., II., III., IV., are bars fixed to the rim for handling the plate.
According to another modification of this construction, shewn in sectional plan
and cross section respectively at Figs. 3 and 4, the serpentine bar f is first welded
with both ends to the frame e, and these, together with the outer rim c, aro then
welded to the plates a and b. By this construction the plate is afforded great
strength against external pressure.

page_text: Figs. 5 to 9 shew a plate constructed according to the second above described
method, that is to say, with passages bored in a solid slab of wrought iron or steel.
Fig. 5 shews a sectional plan; Fig. 6, a cross section; Fig. 7, a longitudinal section;
Fig. 8, a plan, and Fig. 9, an end view. In this construction a solid slab of wrought
iron or steel has a number of parallel passages bored through it transversely, and at
right angles to these two other passages longitudinally near the sides of the plate,
the longitudinal passages being made to connect all the transverse passages. The
open ends of all the passages, with the exception of the two at A¹ and B', which serve
for the inlet and outlet of the heating fluid, are closed by conical screw plugs as
shewn. In addition to the advantage of the great strength afforded by this 1
construction, it has the further advantage that by removing the screw plugs at any
time the passages can be cleared of deposits, and thus the perfect uniforin heating
action of the plates be insured.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Friedrich Carl Glaser in the Great Seal Patent Office on the
11th March 1881.
EE
FRIEDRICH CARL GLASER, of Berlin, in the Kingdom of Prussia and Empire
of Germany, Engineer and Patent Solicitor. IMPROVEMENTS IN HOTPLATES FOR
PRESSES." A communication by Rudolf Dinnendahl, of Crefeld, in the German
Empire.
This Invention has reference to plates used in presses that are heated internally
by steam or other fluids, such plates being more particularly used in the dressing
of textile fabrics. Such plates have heretofore either been made of cast iron or of
rivetted wrought iron, and have consequently soon become defective. According to
the present Invention such plates aro made of a more durable nature, eithor by
welding together the several parts of wrought iron or steel composing thein, as will
be presently described, or by producing the requisito passages in a solid slab of
metal by boring. Figs. 1 and 2 of the accompanying Drawings show respectively
in sectional plan and longitudinal section ono mode of constructing such hot plates
according to the first described plan. A wrought iron or steel flat bar & is bent
into serpentine form as shewn, and after welding the one end thereof to the
surrounding rim both parts are then welded together with the top and bottom
plates. I., II., III., IV., are bars fixed to the rim for handling the plate.
According to another modification of this construction, shown in sectional plan
and cross section respectively, at Figs. 3 and 4, the serpentine barf is first wolded
with both ends to the frame e, and these together with the outer rim care
then welded to the plates a and b; by this construction the plate is afforded great
strength against external pressure.
Figs 5 to 9 show a plate constructed according to the second above described
method, that is to say, with passages bored in a solid slab of wrought iron or steel.
Fig. 5 shows a sectional plan; Fig. 6, a cross section; Fig. 7, a longitudinal section;
Fig. 8, a plan, and Fig. 9, an end view. In this construction a solid slab of wrought
iron or steel has a number of parallel passages bored through it transversely, and
at right angles to these, two other passages longitudinally near the sides of the
plate, the longitudinal passages being inado to connect all the transverse passages.
The open ends of all the passages, with the exception of the two at A and B, which
serve for the inlet and outlet of the heating fluid are closed by conical screw plugs
as shown. In addition to the advantage of the great strength afforded by this
construction, it has the further advantage that by removing the screw plugs at any
time the passages can be cleared of deposits, and thus the perfect uniform heating
action of the plates be insured. They are also not liable to leakage and require no
repairs, as no welding or rivetting occurs therein.
Having thus described the nature of the said Invention, and in what manner the
same is to be performed, as communicated to me by my correspondent, I claim,-
First. Constructing hot plates for presses, consisting of two plates or slabs
forining the top and bottom of the hot plate welded to a frame or frames forming
the sides of the plate, and to an internal serpentino or curved bar forming
passages within the plate, substantially as herein described.
Second. Constructing hot plates for presses of solid metal slabs, in which passages
are bored so as to communicate with each other for the circulation of the heating
fluid, the outer ends of such passages being closed by screw plugs or caps, with

page_text: the exception of those serving for the inlet and outlet of the heating fluid,
substantially as herein described.
In witness whereof, I, the said Friedrich Carl Glaser, have hereunto set
my hand and seal, this Ninth day of February, in the year of our Lord
One thousand eight hundred and eighty-one.
F. C. GLASER. (L.S.)

page_text: FIC. 5.