Year: 1888

page_text: We OLE EVENSTAD, Mill-owner, and OLAUS SENSTAD, Mill-manager, both of Rasten,
Storelvedalen, in the Kingdom of Norway, 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 :-
The object of this invention is to provide an improved machine for the production
of what is known as Wood-wool from shavings, such as are produced in wood-working
establishments.
The principal difference between the improved machine and those heretofore in use
is that we employ for cutting the shavings two revolving rollers with annular ribs
so placed against each other that the ribs engage with each other and constitute
cutters.
In the accompanying drawing we have shown a machine for making wood-wool
wherein such rollers are employed.
Fig. 1. is a side elevation of the complete machine.
Fig. 2. is a front elevation of the same.
Fig. 3. is a plan.
Fig. 4 is a view of a portion of the rollers drawn to an enlarged scale.
The improved machine comprises an extender, or conductor, which receives the
shavings as they come from the plane, a shoot, or guide, through which the shavings
are conducted down to the rollers, which cut them into longitudinal strips, an arrange-
ment of knife by which the shavings are cut up into the required lengths, and a coarse
sieve whereby the refuse is separated and from which the prepared wood-wool is
removed.
The shavings come from the plane a of the planing machine down upon the extender,
the endless band 6 of which passes over two rollers, placed immediately under
the plane in order to receive the shavings directly they leave the plane and prevent

page_text: them from becoming twisted or uneven.
The extender may be moved upon the
point b¹, so as to be out of the way and form no obstacle to easy access to the plane
and to allow of regulating the knives &c.
In order to prevent the cuttings from flying out from the cutter we provide a
guard c.
5
From the extender b the shavings pass into the shoot or guide d, one of the sides
of which is formed by an endless band e working over two rollers el ell and serving
to conduct the shavings down to the cutting rollers f,f' mounted on the frame or
stand of the machine. The surfaces of the cutting rollers f, fare formed into conical
ribs or rings having flat surfaces at their bases, as clearly shown in figure 4, and the 1
rollers are placed inversely against each other, so that the flat surfaces of the rings
will work against one another and form cutters when the rollers are revolved.
The space between the conical portions of the rings of the rollers and the pressure
of the cutting rings against one another are adjusted by means of pressure screws h, h
and h¹.
On leaving the shoot or guide d the shavings are seized by the rollers and are cut
longitudinally into narrow strips, their width being equal to the distance between the
ribs or rings of the rollers, the said strips constituting the wood-wool on leaving
the rollers down through a shoot g at the mouths of which is fixed a knife i
which cuts them up into the required lengths.
The knife i is fixed to a horizontal frame k, mounted in lugs 1, between which is
placed a spring m which moves the knife back, the advancing motion of the knife
being effected by a small block n, or fixed to an endless chain o travelling over two
sheaves o¹, o. The sheave o" can be moved in guides p. The block n as it passes
projections fixed to the frame or stand of the machine pushes the knife i forward
and the knife cuts off the wood-wool by passing under and against the edges of the
shoot 9. The knife i is then moved back by the spring m. By varying the length
of the chain o a shorter or longer duration between each cut is obtained and in this
manner the wood wool is produced of the required length.
Under the knife i is placed a movable coarse sieve t suspended by chains t¹ and having
a vibratory motion communicated to it by means of a crank t". By this coarse sieve
the small shavings and other refuse are removed from the wood-wool, which is thence
brought into the press to be formed into bales before leaving the works.
The rings can be turned out of the cylindrical surface of the rollers or they may
consist of rings made separate from the rollers and screwed tightly to one another,
and they can of course be made of any suitable shape which will enable them to form
cutters when the rollers are brought close to each other.
Our improved machine for making wood-wool is more simple and stronger than
those hitherto constructed and is better adapted for utilizing shavings which are
frequently considered as of scarcely any value in planing works.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In machines for making wood-wool from shavings the arrangement of a pair of
revolving rollers having annular ribs, placed against each other so that they constitute
cutters adapted to cut the shavings up longitudinally into strips, substantially as
hereinbefore described.
2. In machines for making wood-wool the construction of cutting rollers, provided
with conical rings having flat surfaces, those of one roller working against the corre
sponding flat surfaces of the ribs of the other roller, substantially as and for the
purpose hereinhefore described.
3. In machines for making wood-wool the arrangement of adjusting pressure
screws h, h and h¹ for regulating the position of the rollers with regard to each other
substantially as hereinbefore described.
4. In machines for making wood-wool the arrangement of reciprocating knife
placed under the rollers and having its motion regulated by a chain o carrying

page_text: block n, by which the wood-wool is cut into the required lengths, substantially as
setforth.
5. In machines for making wood-wool, the arrangement of vibrating coarse sieve t,
placed under the knife i, for freeing the wood-wool from refuse, substantially as setforth.
6. In machines for making wood-wool, the combination of the extender b, the
shoot d, the rollers f, f, the knife i, and the chain o, with the block n and the movable
coarse sieve t, substantially as setforth.
7. The improved machine for making wood-wool hereinbefore described and
illustrated in the accompanying drawing.