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Патент USA US2133449

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Oct. 18, 1938.
Filed May 5, 1937
5 Sheets-Sheet l
Oct. 18, 1938.
‘3 Sheets-Sheet 2
Filed May 5, 1937
F. 1
Patented Oct. 18', 1938
2,133,449 , '
Anton Joseph Hang, Nashua, N. H.
‘Application my 5, 1937, Serial No. 140,881
5 Claims.
IIUhis invention relates to machines of the gen
.eral type disclosed in my prior Patent No.
2,066,107,- ,granted December 29, 1936. While
these machines were designed primarily .for the
purpose of refining the coarser constituents of
(c1; sit-26)] '
ings 1-1 at opposite ends of the machine, and
two additional rolls are similarly supported, as‘
shown in Fig. 2, the three rolls being spaced apart
by equal angular distances. Springs, such as
those shown at ID, are interposed between the I
Paper stock _such,'for example, as the materials , hub of the spider I and the free end portions of
rejected by the pulp screens, they have also been the respective links 8 where they serve to hold‘
found' useful for other purposes, especially in the rolls 8 continuously in contact with the inner
certain of the preliminary steps in working up
10 the material from which paper, paper board, and surface of the cylinder 3. During the operation
'_of the machine the shaft 4 is revolved in a_l0.
allied products are made. For convenience, such counter-clockwise direction,Fig. 2, through'pow- ‘ .
materials will be hereinafter referred to as "pa
er applied to the pulley i2, Fig. l, and the cen
trifugal force created in ‘the rolls and their im
The present invention aims to improve ma
mediate supports by such rotation also serves
chines of this type with a view to making them to hold‘ these rolls against the inner surface of 15.
more‘ e?icient,,increasing the range of materials the‘ cylinder. In fact, the pressure so created‘
which they are capable of handling, reducing between the, rolls and the cylinder wall is relied
the care and attention required by them, and upon chie?y in re?ning the stock, the springs'lll
generally increasing their usefulness. '
merely preventing the rolls from falling away
The nature‘of the invention will be readily from the cylinder 3 when the machine is stopped, 20 ‘
' understood from the following description when
read in connection with the accompanying draw
and acting as shock absorbers.
At one end of the casing 2 it is provided with
lnas. and the novel
features will be, particularly van intake chute l4 andat its opposite end‘with a
pointed out in the appended claims.
discharge port or opening I 5. - As the paper stock
In the‘ drawings, ,
_ >
is fed into the intake chute it passes between two/26
Figure l is a vertical, sectional view, "with some sets of rotary knives or‘ disk cutters l6 and II,
parts broken away and some in elevation, of a " the teeth of which overlap each other, as shown
machine embodying this invention; /_
in Fig. :2, ,so that they serve to break up and
view shred to a substantial degree the material intro
30. of the machine shown in Fig. 1 on approximately
duced into the drum. This stock immediately 30
‘ the line 2-2, Fig. 1; .
comes into the range of operation of a series of
, Fig. 3 is a‘longitudinal, sectional view of a por
inclined blades-l8 mounted fast‘ on. the shaft 4
tion of the drum or cylinder;
1 to revolve with it and spaced between the rolls 8.
Figs. 4, 5 and ,6 are sectional views approxi
35 'mately on the lines 4-4, 5-5, and 6+6, respec
’ This series of blades extends the entire length of
the drum and serves to convey the stock through‘ 35
tively, Fig. 3;
it from the intake to the discharge port. Ejec
Fig. 7 is a vertical, sectional viewithrough anv tion of the. refined stock through the port I! is
end portion of one of the rolls approximately on
the line 1-1, "Fig. A‘; and
Fig. 8 shows a modified bearing structure.
Referring first to Figs. 1 and 2, the machine’
there shown comprises a drum or casing 2 which
includes a cylindrical lining or shell 3. Extend
ing longitudinally through this casing is a hori
45 zontal shaft 4 carrying two spiders 5-5 at its
facilitated by a. scraper 20, Fig.- 1', which is
securedto and‘krevolves with the shaft 4 and
operates in the'annular chamber at the dis- 40
v charge end of the casing.
As ‘the stock moves through the drum, the rolls
crush it against the inner surface of the cylinder
3. ' Referring to Fig. 1 it will be seenthat the
peripheral surface of the roll 8 is provided with
opposite ends, these spiders being rigidly secured _ diagonal depressions or grooves,_such as those
to the shaft for rotation therewith‘. In the par 'indicated at a, and that these grooves are re
ticular machine shown, each spider is provided _
with three radial arms ‘each provided with a
bearing at its outer end. Supported on these
bearing portions of the arms are additional arms
or links 6 which themselves carry bearings, such
as those shown ‘at 'I in Fig. 1. A roll ,8, Fig. 1,
located“ within and extending longitudinally‘of
the cylinder 3. is mounted in two of these bear
versely arranged, some of them having a clock-_
wise component around the circumference of the '
roll, while others have a counter-clockwise com
ponent. They intersect each other at frequent
intervals and thus divide’ the greater part of the
surface of the roll into a series of diamond-shaped
sections. Similarly, the inner surface of the cyl
inder 3 is provided’with diagonal depressions'or I"
' 2
- 9,188,449
grooves, such as those shown at 12, these grooves
being reversely ’arranged and intersecting each
other in substantially the same way as do the
for machine ‘parts made ‘from them. f‘mcarta"
is a typical example of a satisfactory commercial 1
material from which to make these bushings
and other bearing elements.‘ Such bushings are
shown in the drawings at 22 and 23, Fig. 1. In
grooves a. Those in the cylinder, however, are
spaced farther apart than are the grooves in the order to supply water substantially continuously
roll. All of the rolls are substantially identical
to these surfaces at the right-hand end of the
in construction.
The grooving of the rolls, whether reversely or shaft, Fig. l, a collar 24 is secured fast on the
otherwise, is of advantage in producing the rota
10 tion of the rolls around their individual axes
which is necessary to their proper operation, and
also produces a far more effective and emcient
re?ning of the stock. When grooved in one
direction only, however, they produce a reaction
on the stock which tends both to move the stock
axially in the casing and also to move the rolls
This produces a thrust on the roll bear- _
shaft, this collar being hollow and provided at
one end with a circular cut-out portion through 10
which a nozzle 25 projects. Water from any
convenient source of supply is fedithrough this
nozzle into the collar at the desired rate. From
the collar it is discharged into the respective roll _
bearings through nozzlescooperating with them,
one of these nozzles being shown at 26,. It de
livers its water into a receptacle 21 formed in the
bearing at the end of the shaft. This water may
?nd its way along the bearing surface. through
ings which often tends to make themheat up,
and in any' event, is undesirable. Such end grooves in the shaft or through a hole 28 formed 20
thrust, however, is avoided, and the efiiciency of centraliy'in the shaft, radial ducts leading from'
the rolls is increased by reversely grooving them. this hole to the outer surface of the journal. Also,
The efficiency of the machine is‘further increased additional radial holes, one of which is shown at
by grooving the cylinder 3. An additional and a 30, 'OQHdUCtRthB lubricating water to the spherical
important advantage of this feature of the inven
bearing surface 3|. Pipe connections 32 also lead
tion is that it enables the machine to‘ handle water from the collar 24 into a duct 33 formed
successfully coarser stock and certain kinds of in the bearing boss 34 at the outer end of the
material which are slippery and which, conse
spider arm, this duct leading the water to the
quently, could not be successfully treated in the surface of the bushing 23. The same arrange
machine without the additional grip afforded by ment is repeated for the other journals and spider w
' the grooves in the casing cooperating with those
arms, and is duplicated at the opposite end of
in the rolls. The reverse arrangement of the
cylinder grooves also eliminates the undesirable the.
Partitions, such as those shown at 35 and 36,‘
axial reaction on the stock which otherwise would preferably are provided also at the opposite ends
be produced.
of the drum to separate the chamber containing 35
Since the stock at the intake end of the drum the paper stock from the compartments in which I
is relatively coarse and is reduced to a more the spiders and the bearings are mounted. This
?nely divided condition as it progresses toward partition arrangement may be like that shown in
the out1et,‘I have found it advantageous to taper my prior patent above designated, and it may
the grooves both in the cylinder and in the rolls. also be equipped with packing devices around 40
4 (i That is, the grooves are relatively large at the
the ends of the shaft of the same general nature
intake end of the machine and taper gradually as those shown in said patent. While it is im
toward. the opposite end. In 'the cylinder this portant to keep the paper stock out of the bear
construction is well shown in Figs. 3 to"6, and ing chambers, it is not at all important to keep
essentially the same relationship is satisfactory
the water used as a lubricant'from entering the 45
45 in the rolls. Naturally the size of. the grooves stock working chamber since this stock is always
used will vary somewhat with the nature of the mixed with water. In fact, the lubricating wa
stock and other practical details of individual ter may either be discharged directly into the
installations. A typical depth is approximately pan 40 into which the re?ned stock is elected,
?ve-sixteenths of an inch at the larger end and ' or into supplemental discharge chutes.
50 they taper uniformly to zero at or adjacent to the _ Another arrangement which may conveniently
opposite end of the roll or the cylinder. They be used. for supplying water to the bearing sur
preferably are cut spirally.
faces, and which is somewhat simpler than that
A further feature of this invention which is above described, is shown in Fig. 8. Here the
useful in re?ning stock containing coarse chips bearing bushing “1', corresponding to~the mem- ,
and-other relatively large pieces of material, con
her ‘I shown in Fig. 1, is made of f‘Micarta” or
sists in providing that portion‘ of the roll 8 which other suitable non-metallic bearing material ca
lies in the chamber A, and into which the material pable ‘of being lubricated by water, and the por
drops from the chute M, with- relatively large tions of this member extending beyond its sup
and prominent; teeth 21, Figs. 1 and 7., These port are provided with holes drilled radially there 60
teeth cooperate withvthe adjacent wall of the\ through. Spray nozzles 43 are led through the
drum to break up the larger pieces of stock and _ casing 31 and positioned to direct sprays of water
thus reduce them to such a size that they can against the perforated sections of the bushings
be more effectually handled by the rolls.
"l' for the different bearings as they swing through The lubrication of the rolls‘and other bearing their paths of movement. Essentially the same (35
surfaces in a machine of this type is especially idea can be applied ,to the other bearings. While
troublesome because of the necessity for keeping this arrangement does not directly apply water
water out of the bearings and also preventing any to the spherical surfaces of the bushing ‘I’, _
substantial amount of lubricating oil from ?nd
enough spray works on to these surfaces to lubri
ing its way into-the re?ned stock. I have found cate them satisfactorily.
this difficulty can be effectually overcome
With regard to the grooving of the rolls and
70 that
by replacing the metal bushings of the bearings the inner surface of the drum, applicant has
with non-metallic bushings, such as those made
of fiber indurated by heat and impregnation with shown a construction which he prefers, but it
be evident that either,'or both, of these mem
rubber, synthetic resins, and similar materials, will
bers can be roughened in other ways so that they 75
will perform essentially the same operations on
as to leave intervening lands falling opposite lands
the stock as do the grooved members. The im
on the other as the rolls rotate around the axis
portant point is that the construction shall be
adapted for this purpose and that the grooves
of the drum, whereby the relative bodily rota-'
tion of the rolls in the cylinder revolves them
or other roughening elements in the two members
shall not be such that the rolls can interlock‘
with the drum.- So long as these conditions are
the stock and the crushing action of the rolls
met, the shape given to these elements to make
them perform these functions can‘take a wide
10 variety of forms. - In the construction shown any
interlocking of the rolls with the drum is pre
vented by the fact that the lands intervening be
tween grooves in the surface of the roll are al
around their own axes due to their contact with
on the stock is increased.
2. A machine according to preceding claim 1,
‘in which said depressions in both the rolls and
said drum are diagonally disposed with reference
to radial planes, respectively, of said rolls and
3. A machine according to preceding claim 1,
so that hot or cold water, steam, or the like, can
in which said depressions in both the rolls and
said drum are reversely disposed and intersect 15
with each other diagonally so that the crushing
action exerted on the stock by the ,rolls doesnot
create any substantial degree of end thrust on
be circulated throughthe jacket'space to produce
the rolls.
ways opposed to lands on the drum.
In refining some kinds of stock, the factor of
temperature is important, and in such cases I
prefer to equip the drum with a jacket 45, Fig. 1,
20 the desired temperature conditions.
In some cases, also, it is of advantage to spray
hot water, steam, or the like, upon the stock as it
travels through the drum, and this member vmay
be equipped with any desired number of spray
nozzles such, for example, as that shown at 46
for this purpose. In the event that it is undesir
4. A machine according to preceding claim 1, 20
in which said drumis provided with inlet and out
let passages near opposite. ends thereof, and the
surfaces of both the rolls and the drum are re
versely grooved, the grooves diagonally intersect
ing each other in each of said surfaces to produce
substantially diamond-shaped sections in them
and said grooves in both the rolls and the drum
able to discharge the water used for lubricat
are larger at the inlet end of the drum than at
ing purposes into the pan 40, this pan may be pro
vided with supplemental discharge chutes, such, the outlet end thereof.
5. In a machine for re?ning paper stock and
80 as those shown at 44-44, and also with a de
the like, the combination of a drum adapted to
?ector or gate 45 adjustableinto an approxi
mately upright position,_as shown, or into 'a ?at .hold a quantity of said stock, a roll in said drum
for acting upon the stock, said roll extending
longitudinally of the stock chamber in the drum,
the lubricating liquid into its discharge ports.
85 While I have herein shown and described a‘ means supporting said roll for rotation about its 36
inoperative position, the de?ector serving to guide
‘preferred embodiment of my invention, it will be
evident from the foregoing that the invention
may be embodied-in other forms without depart
ing from the spirit or scope thereof.
Having thus described my invention, what I
desire to claim as new is:
1. In a machine for re?ning paper stock and
the like, the combination of a drum having an
approximately cylindrical inner\ surface and
45 adapted to hold a quantity of said- stock, a plu
rality of rolls mounted in said drum and extend
ing longitudinally thereof for engaging the stock
and crushing it against said surface, means sup
porting said rolls for bodily rotation around the
50 axis of said drum, for rotation around their-in
dividual axes, and for lateral movement toward
and from the inner surface of- said drum, the pe
ripheral surfaces of said rolls and the inner sur-.
own axis in contact with the stock and for move
ment toward and from the inner surface of said
drum to cause it to crush said stock against said
surface, means forrevolving said roll around the
axis of said drum, the peripheral surface of said
roll being roughened to grip said stock, said drum
having an inlet at one end thereof and an out
let for the stock at the opposite end, and said roll
having teeth thereon at the portion thereof ad
jacent to said inlet, said- teeth being relatively
large and serving to exert a ~severe breaking action
on the large pieces of stock.
6. JA,machine according to preceding 'claim' 1,
in which said drum is provided with inlet and
outlet passages near opposite ends thereof, and 50
said'rolls having coarse and prominent teeth
on the portions thereof at the inlet end of the
face of said drum both being provided with de
pressions, the depressions of one being 'so disposed
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