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Патент USA US2124393

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July 19, 1938.
' . R. c. BENNER ET AL
Filed Nov. 14,‘ 1935
2 Sheets—-Sheet 1
July 19, 1938.
Filed Nov. 14, 1955
2 Sheets-Sheet. 2‘
Patented July 19,1938 I
- v2,124,393
Raymond 0. Banner, Niagara Falls, and Albert L.
Ball, Lewiston, 'N. Y., assignors, by mesneas
signments, to The Carborundum Company; Ni
agara'Falls, N. Y., a corporation of Delaware
Application November 14, 1935, Serial No. 49.104
1‘ Claim. (01. lib-27)
This invention relates to the class of machines description of this method is included here for the
commonly referred to as-re?ners, re?ning en
gines, Jordan re?ners or'Jordan engines, and has
for its purpose the provision of a machine» with
5 superior operating characteristics.
Machines of this class mentioned‘ above are
used for the re?nement of ?brous materials, such
as wood pulp and are used to a large extent in
salvaging material too coarse to be used 'in the
‘ ‘10 manufacture of paper.
It has been known that a re?ner in which the
purpose of clarity and‘ completeness.
The shell is ?rst sand-blasted in order to re-.
move scale and the like and to produce a clean,
bright surface. If not touched by the hands or
if not allowed to come in contact in any way with
oils or greases or the like, the Sande-blasted sur
face is ready tor use as is,- but otherwise it should
be washed oil with gasoline, naptha or other
grease removing material. The bright metal 10
surface is then coated with a cement suitable
shell ‘was lined with bonded abrasive material
and the plug was made of bonded abrasive ma
terial would operate more satisfactorily than the
for promoting the adherence of rubber to metal.
vThe previous re?ners in which bonded abrasives
were used were found to have certain disad
air bubbles that may gather.~ Apsuitable type of
rubber for the purpose is that known in the rub,
vantages because both the shell lining and the
ber art as treadstock.
A layer of unvulcanized rubber compound ap
proximately one-fourth (V4) inch thick is then 15
15 previously known re?ners, in which metal bars , applied to the cement coated surface ‘of the
or knives were used in the shell and on the plug. shell and is carefully rolled to squeeze out any
The surfaces of the abrasive blocks that are 20
to be joined, either one to another or to the metal
quence of this rigidity the linings and plugs have shell, are, then coated with the rubber cement
,worn out quite rapidly and the quality of ?bre referred to above. The blocks are then placed
‘on the layer of rubber applied to the shell and
produced has been inferior.
In accordance with the presentinventiomeither asimilar layer of rubber is placed between the 25
plug were unyielding; that is, there was no resil
iency in the lining or in the plug. As a conse
the shell lining, the plugyor both the shell lining
and the plug are made resilient.
Thus, the gap
adjacent blocks. When the entire shell has been
?tted with blocks. in the manner Just described,
between the shell lining and the plug, which gap a suitable mandrel can be inserted to apply pres
' ordinarily is quite small, enlarges slightly when sure to the blocks, whereby they are forced into
30 more than the usual amount oi’ pulp, or pulp of intimate contact with the layer of rubber, and 30
then heat can be applied‘ tocure the rubber and‘
greater consistency, is forced through the ma
chine. The enlarged gap results in less wear on bind the'blocks, .
the parts and also permits of better re?ning,
with less cutting up of the'?brous material.
35 ~ A better understanding of the invention will
‘be had by reference to the accompanying draw
ings in which
The method by which the rubber is vulcane
ized is a matter of choice and convenience be
cause it can be done by any of the methods well
' known in the rubber art.
The assembly of the plug illustrated in Figure
2 is carried out in the s'amegeneral manner as
was just described for the shell of Figure 1. In
Figure 1 is a broken awayview of a part of a
shell and its lining;
p 40
Figure 2 is a perspective ‘view of a .plug made. this case the shaft II is given a bright, clean
in accordance with the invention;
Figure 3 is a broken ‘away view of a part of a
shell/and another type of lining; and
Figure 4' is a perspective view or a plugin
which a modi?cation _of the invention is utilized.
I 'In Figure 1, the metal .shell I is shown with
- blocks of bonded abrasive material 2 attached
1thereto by means of a layer of rubber I, which
50 is tough and resilient. The rubber also ex
tends. between the (abrasive blocks and thus fur
' theradds to the resiliency of the structure.
The method by which the abrasive blocks are
attached to the metal shell- is the same as the
55 methodwell-known in the art. however, a brief
- surface by sand~blasting and washing with grease
solvent if necessary. Then the abrasive seg
ments ll , forming the frusto-conical abrasive
member are applied to the shalt with their ?utes
II in alignment after .the same has been coated 45
with suitable rubber cement and rubber. Here
again a layer of rubber .is- applied between the
abrasive members. The layer of rubber l2 shown
between the blocks II and between the blocks
II and the, shaft} II is oftough resilient nature 50
when cured. Such a material is the tread stock
known to the rubber art.
' '\
vThe modi?cation shown in ‘Figure 3 differs,
from that shown in Figure l in that relatively
small pieces of bonded. abrasive material 20 are
used instead of large blocks as in the former
?gure, and that these smaller pieces are held in
place and to the metal shell by a matrix of rub
ber 2_I instead of by a layer of rubber. The rela
As has been stated above, a re?ner'built ac
cording to the present invention has advantages
of considerable merit. The stock recovered from
a machine embodying the present invention
the same may be used to obtain a higher degree
of resiliency than that obtained by the use of a
makes a better sheet of paper because the ?bres,
although of less thickness, are of greater length
rubber matrix.
In Figure 4 is shown a modi?ed form of plug
in which relatively small pieces of bonded abra
sive 3| are held in a matrix of rubber 32. As in
the modi?cation of shell lining shown in Figure
15 3, the layer of rubber between the metal shaft l0
and are well frayed. These longer, well frayed 10
?bres mat well and produce a strong, smooth
sheet of paper.
The presentylnvention also has the advantage of
givinglonger life to the abrasive members by
reducing the wear upon them. The resiliencyof 15
and the abrasive member can be dispensed with,
although it may be used if it is desired to ob
the abrasive member or members provides a gap
that expands as the load increases and hence
tain additional resiliency.
produces a path of greater area through which
the stock may pass. Consequently, the pressure
and shock exerted upon the abrasive face is less 20
and the wear is reduced.
Other advantages will become apparent to
those skilled in the art. and it also will become
apparent that other modi?cations than those il
lustrated and described can be constructed with
out, departing from the scope of the invention,
which is de?ned by the following claim.
As ‘is already well known in the art, a re?ner '
20 comprises a shell and a plug rotatably mounted
within the said shell, and usually the interior at
' least of the shell is of frusto-conical shape.
plug for a frusto-conical shell also is of frusto
conical shape and ?ts very closely into the said
lug action.
irregular shape. The blocks being resilient, do
not require the resilient layer of rubber although
tively small abrasive pieces can be of regular or
only a small gap, and at the same time roughs
the surfaces so that they produce a greater re?n
In carrying out the present invention either of
the types of shell illustrated may be used with
either of the types of plug, also illustrated. If
desired, however, a conventional abrasive plug
30 may be combined with either of the types of
shell illustrated, or a conventional abrasive shell
can. be combined with either of the types of plug
A close ?t between the shell and plug is ob
tained by rotating the plug within the shell while
?ne abrasive granules, such as sand, emery, sili
con carbide or fused alumina, and water are
forced between the said shell and said plug. This
trues up the two surfaces so that they present
We claim:
A pulp refining engine comprising in combina
tion, a metal shell, a lining for said shell consist
ing of bonded‘ abrasive blocks, a substantially
continuous layer of tough, resilient, vulcanized
rubber between said blocks and between said
blocks and said shell, the said blocks being at
tached to said shell by the said layer of rubber, 35
and a plug of bonded abrasive material rotatably
mounted within said shell.
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