Improvements in Edge Runners or Mills for Reducing Paper-making Materials or other Substances.
Year: 1889

page_text: Date of Application, 21st Nov., 1889-Accepted, 21st Dec., 1889
COMPLETE SPECIFICATION.
Improvements in Edge Runners or Mills for Reducing Paper-making
Materials or other Substances.
I ALBERT EDWIN REED of Highdene Sidcup in the County of Kent do
hereby declare the nature of this Invention (which has been communicated to me
from abroad by Auguste Abadie of Angoulême in the Republic of France Engineer)
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
This Invention has for its object to improve edge runners or mills for reducing
paper making materials or other substances by providing a bed or surface on which
the runners act which gives a better action upon the materials operated upon than is
obtainable from such bed or surface as hitherto nade, and also by providing means
for raising and lowering the scrapers in which there is no revolving releasing handle,
such as has hitherto been used.
According to this Invention the bed or surface on which the runners act is made
with hard metal in the form of chequers or the like with intervening parts which are
lower or of a softer material than the other parts, or chequers. The arrangement
for lifting and lowering the scrapers by which the material is mixed and sub-
sequently removed from the bed when it has been sufficiently reduced, consists of a
handle or lever underneath the pan of the mill, which operates on a collar on the
shaft of the mill, which collar is connected with a rod passing through the said shaft
and at its upper end acts on a lever by which the scrapers are raised and
lowered.
I will describe the Invention more particularly with reference to the accom-
panying drawings premising that I do not limit myself to the precise details which I
shall describe.
Figure 1, is a vertical section of an apparatus provided with this Invention.
Figure 2 shaws a part thereof in transverse section, taken on a line immediately
underneath the pan. Figures 3 to 6 illustrate (drawn to a larger scale) the
construction of the bed or surface on which the runners act, and Figure 7
is a part of the said bed or surface in plan shewing the chequered formation
thereof.
For
The said bed or surface a is made up of pieces of metal, preferably of a rect
angular shape in cross section as shewn in Figures 3 and 4, forming a chequered
structure. The spaces between the chequers are made with their surfaces slightly
below the other parts or the said spaces may be filled in with a softer material.
instance the chequers may be male of cast iron or steel, and the spaces be filled in
with lead, wood, or other relatively soft material. In Figure 4 the lined parts shew
the harder material and the unlined parts shew the softer material. In Figures 5
and 6 is shewn an arrangement in which the separate pieces are replaced by bars
with projecting portions or teeth at the upper side, and spaces between for the
material of a different degree of hardness or softness, these bars being ranged side by
side with the teeth of the one covering the spaces in the other. or other: adjacent
thereto, so that when these bars are placed together they make a chequered bed or
surface like that shewn in Figures 3 and 4. The construction of the bed or surface
as described prevents the runners and the materials from slipping and so not properly
acting or being acted upon, and further the edges formed by the junction of the soft
and hard surfaces, enable the runners to get a better grip or "bite" on the materials
being acted on whereby the materials are more rapidly triturated or reduced and the
bed plate remains in order for a long time whilst the runners do not wear at their
angles and the whole of the mechanism is maintained in better condition.
The means provided according to this invention for raising and lowering the clearing
levice or scraper consist of a levers centered to a bracket p¹. This lever at its

page_text: inner end is bifurcated and projections on the fork enter a circular groove in a
collar z capable of sliding vertically on the vertical shaft y of the machine, the said
collar being connected by a pin (passing through a longitudinal slot in the vertical
shaft y) to a rod w passing up through the shaft y and entering a guide at w². In the
said rod w is an eye preferably provided with anti-friction rollers through which a
lever passes, the said lever being centered to the bracket p, secured to the rotating
part of the machine, its one end being counter-weighted at a and its other end passing
through the eye o² (preferably provided with anti-friction rollers) on the cross-head o
having rods o which pass through guides y2 secured to the rotating part of the mill,
the said rods o³ carrying at their lower ends the scraper or clearing device ». It will
be seen therefore that as the machine operates, the lever s does not revolve with the
revolving parts, and that when the handle of the said lever is depressed the
scraper o is lowered to operate to clear away the material, which has been reduced,
and that when the said handle of the lever's is raised, the scraper o is raised out of
action.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is :-
1. A bed or reducing surface for edge runners or mills for reducing paper making
materials or other substances, the said bed or surface having hard metal chequers
or the like with intervening portions which are below the level of the chequers
or the like, or are made of a material not so hard as that of the chequers, or the
like, substantially as hereinbefore described.
2. For edge runners or mills for reducing paper making materials or other
substances a bed or reducing surface made of pieces placed together, either as
shewn in Figures 3 and 4 or as shown in Figures 5 and 6 of the accompanying
drawings.
3. In edge runners or mills for reducing paper making materials or other
substances, the arrangement for raising and lowering the scrapers by a lever under
the pan or bed plate and not rotating with the moving portions of the machine
substantially as hereinbefore described.
4. The arrangement and combination of parts constituting an edge runner
or reducing mill, substantially as hereinbefore described and illustrated in the
accompanying drawings.
Dated this 21st day of November 1889.
J. H. JOHNSON & Co.,
Agents.