Improvements in or connected with Tea Rolling Machines.
Year: 1891

page_text: Date of Application, 1st Dec, 1891
Complete Specification Left, 25th Mar., 1892-Accepted, 7th. May, 1892
PROVISIONAL SPECIFICATION.
Improvements in or connected with Tea Rolling Machines.
I, JAMES YATE JOHNSON of 47 Lincoln's Inn Fields in the County of
Middlesex, Gentleman, do hereby declare the nature of this invention which has
been communicated to me from abroad by William Jackson of Colombo, Ceylon,
Engineer, to be as follows:-
When tea leaf is rolled between plates or surfaces as is usual in tea rolling
machines heat is generated by the friction in the charge of leaf being operated on
and this heat prejudicially affects the quality of the tea. It is the object of this
invention to prevent this injurious heating and this is effected according to this
invention by causing a current or currents of air to be passed through or over the
charge of leaf being rolled. This can be done by employing in connection with the
rolling machine a blast fan, air propeller, or air pump or equivalent air forcing device
in such a manner that a current or currents of cool air will be forced into the
charge of leaf being operated on in the rolling machines so that such leaf will be
kept cool during the process of rolling or an air exhauster of any suitable
description may be employed to exhaust the air and so cause the cooling effect by
withdrawing the heat as it is generated. The air forcing or exhausting device
may form a part of the machine itself and be worked with it or it may be worked
separately and then one device may be made to operate to effect the cooling in a
number of rolling machines.
Dated this 1st day of December 1891.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Tea Rolling Machines.
1, JAMES YATE JOHNSON of 47 Lincoln's Inn Fields, in the County of
Middlesex, Gentleman, do hereby declare the nature of this invention (which has
been communicated to me from abroad by William Jackson of Colombo Ceylon,
Engineer,) and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
When tea leaf is rolled between plates, or surfaces, as is usual in tea rolling
machines, heat is generated by the friction in the charge of leaf being operated on,
and this heat, prejudicially affects the quality of the tea. It is the object of this
invention to prevent this injurious heating and this is effected according to this
invention by causing a current, or currents, of air to be passed through, or over, the
charge of leaf being rolled. This can be done by employing, in connection with
the rolling machine, a blast fan, air propeller, or-air pump, or equivalent air-forcing
device, in such a manner that a current, or currents, of cool air will be forced into
the charge of leaf being operated on in the rolling machines so that such leaf will
be kept cool during the process of rolling, or an air exhauster of any suitable
description may be employed to exhaust the air and so cause the cooling effect by
withdrawing the heat as it is generated. The air forcing or exhausting device may
form a part of the machine itself, and be worked with it, or it may be worked
separately and then one device may be made to operate to effect the cooling in a
number of rolling machines.
And in order that the said invention may be fully understood I shall now

page_text: proceed more particularly to describe means whereby it can be carried into
practical effect and for that purpose shall refer to the accompanying drawings.
Figure 1 is a side elevation and Figure 2 is a plan of an arrangement according
to this invention and
Figures 3 and 4 are similar views of a modified arrangement according to this
invention.
In the arrangement Figures 1 and 2. A is a blast, fan, or air impeller. B is a
flexible pipe, supported by the bracket and leading from the fan A. to the jacket
or case C of the roller by the pipe E which is shown as extending along three sides
of the case or jacket but it may extend along one or more of the sides as may be
'most convenient. The fan A. is driven by a belt H from the shaft d which actuates
the rolling surfaces.
In the arrangement Figures 3 and 4 an air pump A* is shewn as being used in
lieu of the fan A the said pump being mounted on the bracket g by the pin a so
that it can swivel or turn to allow it to follow the motion of the crank by which
'it is driven.
•
The pipes B and E are arranged in connection with the jacket or case C as in
Figures 1 and 2.
In both arrangements the pipe or air duct E is perforated at the sides next the
casing the perforations being in communication with perforations made through the
jacket or case C and communicating with the space within, thic said jacket or case
in which the tea leaf is rolled.
$
The fan A and pump A2 may be driven in the ways shown or in any other
'suitable way. The pump A² does not require necessarily to be placed as shown but
may be attached to any other part of the driving or driven parts of the machine or
be otherwise arranged and driven.
In place of forcing the air into the space in which the leaf is rolled as herein-
before described the fan or pump may be used as an exhauster to withdraw air from
the said space.
If one air forcing or exhausting device is to be used to force air into or draw it
from several machines branch pipes may be led from the said device to each of such
machines.
The devices for forcing or exhausting air in themselves alone are not claimed and
they may be of any suitable description.
Having now described and ascertained the nature of the said invention and in
what manner the same is to be performed I declare that what I claim is :-
. 1. The combination with tea rolling machines of means whereby air can be
introduced to or exhausted from the space in which the tea leaf is being rolled for
the purpose of keeping the said leaf cool whilst being so operated upon.
2. The combination with tea rolling machines of an air forcing or exhausting
device operated by or from the machine, and pipes or passages leading from the
said device and communicating with the space in which the leaf being rolled is
contained, substantially as and for the purpose hereinbefore described and
illustrated by Figures 1 and 2 and Figures 3 and 4 of the accompanying
drawings.
Dated this 25th day of March 1892
J. H. JOHNSON & Co.;.
Agents.