Improvements in Machinery for Decorticating Rhea, Hemp, Jute, and other Fibrous Materials.
Year: 1891

page_text: Date of Application, 30th June, 1891
Complete Specification Left, 30th Mar., 1892-Accepted, 30th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Decorticating Rhea, Hemp, Jute,
and other Fibrous Materials.
We GEORGE EDMUND DONISTHORPE of 12 Oat Lane in the City of London
Merchant and TAYLOR BURROWS of 88 Upper Kennington Lane London in the
County of Surrey Engineer do hereby declare the nature of this invention to be as
follows: :-
This machine consists of a feed table on which the stems to be operated .upou
are placed the ends are seized by a pair of superposed rollers fluted or plain which
flatten the stems by heavy pressure and carry them forward this flattening of a
round stem makes an opening on each side so that there are now two superposed
layers with the fibrous parts outside. The ends are now presented to the action of
a second pair of rollers working quicker than the feed rollers. This second pair
are set at a distance from each other and the top roller is acted upon by a spring
or lever to cause it to press lightly down towards the bottom roller.
As the flattened stems are advanced between these quickly revolving rollers
their upper and lower surfaces are rubbed by the rollers and this smooth rubbing
detaches the pellicule or outer covering of the fibrous ribbons or strands.
The stems now in their advance come between a third pair of rollers which are
set at a suitable distance from each other and intergear by pinions at their ends.
The peculiarity and novelty in these rollers is that their surfaces are spirally
screwed or grooved like the screw part of a bolt so that the rollers revolving in
opposite directions and both having the same spiral screw and being set at a
suitable distance from each other the spiral screw on the top roller pushes in its
revolution the loosened fibres in one direction and the bottom roller pushes the
bottom part in the opposite direction thus leaving the central woody part of the
stem detached.
The wood is then taken away by hand and the ribbons or strands or the fibrous
ribbons or strands are dried and baled for the market.
Dated this 20th day of June 1891
TONGUE & BIRKBECK,
34, Southampton Buildings, Chaucery Lane, London, W.C.,
Agents for the latentee.
COMPLETE
SPECIFICATION.
Improvements in Machinery for Decorticating Rhea, Hemp, Jute,
and other Fibrous Materials.
We, GEORGE EDMUND DONISTHORPE of 12 Oat Lane in the City of London,
Merchant, and TAYLOR BURROws of 88 Upper Kennington Lane, London in the
County of Surrey, 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 :-
Our present invention relates to improvements in machinery for decorticating
rhea hemp jute and other fibrous materials and has for its object to produce a
simple and effective machine and not liable to get out of order..
This machine consists of a feed table on which the stems to be operated upon
are placed the ends are seized by a pair of superposed rollers fluted or plain which
Hatten the stems by heavy pressure and carry them forward this flattening of a
round stem makes an opening on each side so that there are now two superposed

page_text: Fi
Fig.
2 is an elevation of the opposite side of the machine.
Fig. 3 is a plan of the machine, and
Fig. 4 is a diagram of the rollers looking endways and feed table and receiving
table.
a' are the first or feed pair of rollers revolved by any suitable train of wheels
actuated by the fast and loose pulleys.
are the second pair or rubbing rollers revolved at about twenty times the
speed of the first pair a a¹ or it may be a greater or less speed than this according
to the nature of the fibre to be treated.
The extra speed on the second pair being obtained by a cog wheel or gear
wheel m (on the axle n on which the pulleys a are mounted) gearing with the
pinion & fixed on the axis of the roller 6-this pinion s meshing with and rotating
the pinion s on the roller b.
8
Also the gear wheel m meshes with and revolves the pinion t on the roller c' of
the third pair of rollers c c and the pinion t meshes with and rotates the pinion t¹
on the roller c―see Fig. 1.
On the other end of roller (that is on the opposite end to s) sec Fig. 2. a
pinion e is fixed and this revolves the larger pinion o having a small pinion p fixed
thereto (or on the same axis) which in its turn revolves the pinion fixed on the
axis of the lower feed roller a' which latter has a wheel f on its other end which
meshes with another g (see Fig. 1.) on the axis of a aud so the speed is reduced-
the feed rollers a a¹ revolved at a slow speed.
•
The pair of rollers a a¹ are geared together (as just described) so that they are
revolved steadily and at the same speed and similarly the pair of rollers bare
also intergeared and pair c c¹ so as to be revolved cqually and steadily at a higher
rate of speed than a a
Or these respective pairs of rollers may be actuated and revolved in any other
suitable or equivalent manner.
The third pair of rollers or "sorting " rollers c c' are revolved as just previously

page_text: described and are formed (after the manner shown in Fig. 3) on their peripheries
with spiral grooves or screw threaded so that the tendency of these spirals or
threads (being of a rather quick pitch) is to push off the fibre or fibrous material
from the woody part of the material passing between them.
The second pair of rollers revolving quicker than the feed rollers a a¹ the
rollers rub past the fibre et cetera as same is held back by the more slowly
revolving feed rolls and consequently the rubbing action is given on the fibre.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is -
1. In machinery for decorticating rhea hemp jute and other fibrous materials-
the combination of a pair of feed rollers with a pair of more quickly revolving.
rollers for rubbing the fibrous material substantially in the manner and for the
purposes hereinbefore set forth.
2. We claim the said pair of feed rollers and the said pair of rubbing rollers in
combination and acting in conjunction with a third pair of rollers spirally grooved
or screw threaded on the peripheries thereof substantially in the manner and for
the purposes hereinbefore set forth.
::
3. We claim the combination of the second pair of roliers or rubbing rollers with
the third pair of rollers or sorting" rollers substantially in the manner and for the
purposes herein before set forth.
4. We claim the improved general arrangement construction and combination of
parts formning our improved machinery for decorticating rhea jute hemp and other
fibrous materials substantially in the manner and for the purposes hereinbefore
described and illustrated in the drawings hereunto annexed.
Dated this 30th day of March 1892.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.