Improved Apparatus for Separating or Disintegrating Fibres in the Manufacture of Paper Pulp.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improved Apparatus for Separating or Disintegrating Fibres in the
Manufacture of Paper Pulp.
1. CARL KELLNER, of 8, Bartensteingasse, Vienna, in the Empire of Austria,
Chemist, 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 :-
This invention relates to the construction of an improved machine to be used in
place of the rag engine or other similar machine at present employed for separating
or disintegrating the fibres of wood or other similar short fibres used in the
manufacture of paper, the object of the invention being to effect a more perfect
separation of the fibres without danger of cutting tearing or breaking the same
as is the case with rag engines.
The nature of my invention and the manner in which the same is to be performed
will be readily understood on reference to the annexed two sheets of drawings
marked with figures and letters of reference corresponding with those in the
following explanation thereof.
Fig. 1 on the annexed drawings is a vertical transverse section, and Fig. 2 a
vertical longitudinal section of my improved apparatus.
The improved machine consists essentially of an externally toothed roller a
revolving inside and almost in contact with a fixed internally toothed cylinder b
which is mounted horizontally or nearly so upon a suitable framing c.
The cylinder is made in sections provided with flanges d and fixed together by
means of bolts e, suitable packing being placed between the joints to make them
liquid-tight, and also to allow of their being adjusted with the greatest accuracy
with regard to the internal roller a so that the rings of teeth 7 upon the latter shall
work between the rings of teeth within the cylinder leaving an even and
regular space between the two surfaces (as shown at Fig. 2) so that the teeth g
and will have a rubbing action upon the fibres but will not cut them.
The teeth upon both the roller a and the cylinder bare preferably of a pyramidal
or V-form as shown at Fig. 2, but the points may be more or less rounded or
blunted, so that the roller and cylinder can be adjusted either nearer together or
further apart and their surfaces still remain parallel.
When the surfaces become worn they can be re-adjusted by thinning the packing
pieces f.
The axle of the toothed roller a is supported by suitable bearings k on the
frame e and is provided with fast and loose strap pulleys for driving the same.
The external cylinder is fixed and its ends are made with suitable stuffing
boxes m through which the axle i passes liquid tight, and it is provided with an
entrance passage or opening n at or near one end and an exit passage or opening o
at or near the opposite end.
The conglomerate fibres after having been digested in the usual manner and
mixed with a suitable quantity of water, are admitted by the passage n at one end
into the space between the toothed roller a and the toothed cylinder and pass out
by the opening o at the other end whilst the toothed roller a revolves and in so
doing the surfaces of the teeth and h rub or triturate the fibres and effectually
separate the same without cutting or otherwise injuring them, thereby greatly
improving the evenness of the pulp and the quality of the paper made therefrom.
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:
First. The improved apparatus for separating or disintegrating fibres in the

page_text: manufacture of paper constructed and operating substantially as hereinbefore
described and illustrated by the drawings annexed, and
Secondly. The combination of an externally pyramidal toothed cylinder revolving
inside a fixed cylinder constructed of Hangel sections similarly toothed internally
substantially as and for the purposes hereinbefore specified.
Dated this 5th day of May 1890.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.