IMPROVE- MENTS IN APPARATUS FOR MANUFACTURING PAPER PULP
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Harry Olrick at the Office of the
Commissioners of Patents on the 27th September 1881. A communication
from abroad by Morris L. Keen, of Experiment Mills, Monroe County, in the
State of Pennsylvania, United States of America.
HARRY OLRICK, of 27, Leadenhall Street, in the City of London. "IMPROVE-
MENTS IN APPARATUS FOR MANUFACTURING PAPER PULP." (A. communication
from abroad by Morris L. Keen, of Experiment Mills, Monroe County, in the State
of Pennsylvania, United States of America.)
The Invention is applicable to boilers of any form, but by preference spherical,
revolving on suitable horizontal trunnions, and adapted to receive a liberal quantity
of stock and to expose it to the action of chemicals with heat. Steam is admittod
through the trunnions and through passages connecting therefrom, either outside or
inside of the shell, leading from the trunnions to points which come alternately at
the lowest and highest points in the boiler as the latter slowly revolves.
The opening of the pipes at the latter points is provided with a screen of
perforated sheet metal or other suitable material of sufficient area to afford a liberal
surface for the introduction of the steam in fine jets.
Means or devices are provided for automatically closing each passage during tho
period while its screen is above the surface of the material in the boiler, and for
holding it open and allowing the steain to be forced into the boiler during a portion
or the whole of the period while it is immersed. The means or devices may be
arranged to perform the double functions of glands for the stuffing boxes and of
cams for operating valves at each revolution.
The valve by which the material is discharged when sufficiently treated is
provided with a delivering-nozzle of a hemispherical form, and also with a discharge
pipe having a socket of a corresponding form, with means for bringing it rapidly
and tightly into contact when the boiler is in the proper position for discharging
the stock. The discharge pipe is connected at the other end to a stand pipe, in
which it is partially cooled by a liberal application of cold water from a sprinkling
plate. From this stand pipe the properly-boiled and disintegrated material is
discharged gently into the washing-vat or other desired portion of the apparatus
for leeching and further treatment. The connection from the stand-pipe to the

page_text: boiler is made when the delivering nozzle is in the lowest position, and the contents
of the boiler are discharged rapidly and completely. The full steam-pressure may
be maintained in the boiler during the entire period of the discharge, but is
preferably shut off towards its close, and the completion of the discharge effected
by the expansion.
The man-hole, which serves also as the receiving nozzle to receive a fresh charge,
is placed opposite to the discharge nozzle, so that while the discharge is being
effected preparations may be made for receiving a fresh charge. No movement of
the boiler is required after the discharge is completed, but the steam pressure being
relieved, the man-hole cover is removed and the proper connection made with little
labor or loss of time.