Improvements in Machinery or Apparatus for Rolling Tea Leaf.
Year: 1891

page_text: Date of Application, 1st Dec., 1891
Complete Specification Left, 25th Mar., 1892-Accepted, 30th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Rolling Tea Leaf.
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 com-
municated to me from abroad by William Jackson of Colombo, Ceylon, Engineer
to be as follows:-
In machines for rolling tea leaf between an under table or plate and a superposed
upper plate or cap placed within a case or jacket it has been hitherto customary
to dish recess or make a cavity in the centre of the under plate and to dish, recess,
or make concave or flat the under side of the upper plate. According to this
invention an improved and effective circulation of the charge of leaf whilst being
rolled is obtained by making the underside or surface of the upper plate convex
or of an inverted dome shape the central part depending to such an extent that
when pressure is applied to the leaf under treatinent the said leaf is caused to
work outwards on the convex surface to the extremities of the upper plate when it
descends on the under plate and is then, through the action of the case or jacket,
collected in the cavity of the under plate and worked upwards through the centre
of the charge being rolled.
Dated this 1st day of December 1891
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Rolling Tea Leaf.
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) and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
In machines for rolling tea leaf between an under table or plate and a super-
posed upper plate or cap or the like placed within a case or jacket it has been
hitherto customary to dish, recess or make a cavity in the centre of the under table
or plate, and to dish, recess, or make concave, or flat, the underside of the upper
plate. According to this invention an improved, and effective, circulation of the
charge of leaf whilst being rolled is obtained by making the underside, or surface,
of the upper plate or the like convex, or of an inverted dome shape, or with a
downward projection the central part depending to such an extent that, when
pressure is applied to the leaf under treatment, the said leaf is caused to work
outwards on the convex or downwardly projecting surface to the extremities of
the upper plate when it descends to the under plate and is then, through the action
of the case or jacket, collected in the cavity of the under plate and worked
upwards through the centre of the charge being rolled.
The accompanying drawing represents a portion of a tea rolling machine
sufficient to illustrate the application of this invention and shews the upper plate
with an inverted dome or convex projection from its underside according to this
invention.
Bare two of the crank
A is the portion of the framework of the machine.
shafts which impart motion to and guide the two surfaces or plates. C is the
under table, or surface or plate and Dis the upper plate or surface. E is the dome

page_text: or convex part on the underside of the plate D. F is the jacket surrounding the
upper plate D. G is a portion of the screw for moving the plate D up and down.
The direction in which the leaf under treatment is circulated is shown by the
arrows.
Although I have shewn the projection E as being of an inverted dome shape I
do not limit myself to that particular shape.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In machines or apparatus of the kind referred to an upper plate or the like
having an inverted dome or convex or downward projection at its underside
substantially as and for the purpose hereinbefore described and illustrated by the
accompanying drawing.
Dated this 25th day of March 1802
J. H. JOHNSON & Co.,
Agents.