Improvements in Steam Jacketted and other Presses, applicable especially for Heating and Finishing Tobacco.
Year: 1891

page_text: Date of Application, 20th July, 1891
Complete Specification Left, 19th Apr., 1392-Accepted, 21st May, 1892
PROVISIONAL SPECIFICATION.
Improvements in Steam Jacketted and other Presses, applicable
especially for Heating and Finishing Tobacco.
I, JOHN ALEXANDER BAXTER, of Dalton Street, Belfast, Engineer, do hereby
declare the nature of this invention to be as follows:-
My improvements relate to steam jacketted and other presses applicable especially
for heating and finishing tobacco.
The sides and back of the box of the press which are steam jacketted I forma
cach with its own steam jacket and without any steam connecting passages carried
through the joints by which the sides and back are connected together. To supply
steam to the steam jackets I admit steam to the top of the steam jacket of one of
the sides and lead it off from near the bottom of this jacket through a pipe which
is led around the exterior of the joint which connects this side with the back and
then opens into the steam jacket of the back and then out of the back and into the
steam jacket of the other side by another pipe which is led around the exterior of
the joint which connects them and then away through a waste pipe. In this way
all possibility of there being any leakage of steam into the press from the joints
where the sides and back are connected is entirely avoided.
In order that the material which is to be submitted to pressure may be com-
pressed equally throughout I form the press with both ends or plattens moveable
and capable of being forced one towards the other by means of screws or otherwise.
In this way the friction of the material under compression against the sides is
overcome and the material is compressed just as much at the bottom as at the top.
Preferably I use a screw for forcing down the upper platten and a hydraulic ram
or piston for forcing up the lower platten.
The upper end of the ram or piston rod I form with a screw thread around it
for a lock nut to work on so that when the ram has been forced upwards the lock
nut may be screwed down along the ram and made to bear against the top of the
hydraulic cylinder. By using a hydraulic press as above described I am able to
measure correctly on a pressure gauge in communication with the hydraulic
cylinder the amount of pressure to which the material under compression is being
subjected.
Dated this 20th day of Jul 1801
JOHN A BAXTER.
COMPLETE SPECIFICATION.
Improvements in Steam Jacketted and other Presses, applicable
especially for Heating and Finishing Tobacco.
I, JOHN ALEXANDER BAXTER, of Dalton Street, Belfast, Engineer, 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 improvements relate to steam jacketted and other presses applicable especially
for heating and finishing tobacco.
The sides and back of the box of the press which are steam jacketted I form
each with its own steam jacket and without any steam connecting passages carried
through the joints by which the sides and back are connected together. The
steam supply to the steam jackets, may be admitted to each side and back
separately and each have a separate waste pipe, but preferably I admit steam to
the top of the steam jacket of one of the sides and lead it off from near the bottom
[Price 8d.1

page_text: of this jacket through a pipe which is led around the exterior of the joint which
connects this side with the back and then opens into the steam jacket of the back
and then out of the back and into the steam jacket of the other side by another
pipe which is led around the exterior of the joint which connects them and then
away through a waste pipe. In this way all possibility of there being any leakage
of steam into the press from the joints where the sides and back are connected is
entirely avoided. To insure that the steam will circulate to the highest point in
each of the sides of the press I insert small cocks at the highest point in each
side which allows the air to escape and when steam issues from them they are closed
and the jacket then remains perfectly full of steam.
In order that the material which is to be submitted to pressure may be com-
pressed equally throughout I form the press with both ends or plattens moveable
and capable of being forced one towards the other by means of screws or other-
wise. In this way the friction of the material under compression against the sides
is overcome and the material is compressed just as much at the bottom as at the
top. Preferably I use a screw for forcing down the upper platten and a hydraulic
ram or piston for forcing up the lower platten.
The upper end of the ram or piston rod I form with a screw thread around it for
a lock nut to work on so that when the ram has been forced upwards the lock nut
may be screwed down along the ram and made to bear against the top of the
hydraulic cylinder. By using a hydraulic press as above described I am able to
measure correctly on a pressure gauge in communication with the hydraulic
cylinder the amount of pressure to which the material under compression is being
subjected.
The drawings annexed shew a press constructed as above described.
Figure 1 is a vertical section and
Figure 2 a cross section with the front of the box or pressing chamber removed.
AA are the steam spaces or jackets on the exterior of the sides and back of the
box. B is the upper platten of the box which can be forced downwards by a
screw B¹.
C is the lower platten which can be forced upwards by the ram of a
hydraulic cylinder C. The ram has a screw thread cut around it on which is
a nut C. By this nut the plutten can be locked and prevented from being forced
downwards. D is the steam inlet at the top of one of the sides. E the tube con-
necting the steam jacket of this side with the steam jacket of the back. F the
tube connecting the steam jacket of the back with the steam jacket of the other
side. The front of the box is in sections which are each secured to the sides by
bolts just in the same way as the back.
As before stated steam may be supplied separately to each steam jacket in place
of leading it from one jacket to another.
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 :-
1. The construction of the sides and back of the boxes or pressing chambers of
steam jacketted presses cach with its own steam jacket independent of the others
and supplied with steam without any steam connecting passages carried through
the joints between the sides and back substantially as described.
2. A steam jacketted or other press with a moveable platten at each end one
worked with a screw or by other suitable means the other by a hydraulic ram
having a screw thread cut around it and provided with a lock nut substantially as
hereinbefore described.
3. The construction of steam jacketted presses for heating and finishing
tobacco substantially as hereinbefore described and illustrated in the drawing
annexed.
Dated this 6th day of Anril 1892.