Machine for Oleaning or Straining Paper-stuff and other like Materials.
Year: 1896

page_text: Date of Application, 22nd Apr., 1896-Accepted, 4th July, 1898
COMPLETE SPECIFICATION.
Machine for Oleaning or Straining Paper-stuff and other like
Materials.
I, HEINRICH SCHAAF, of 38 Veldnerstrasse, Düren, in the Empire of Germany,
Engineer, 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 is a machine for the purpose of cleaning and purifying paper
stuff, and other similar materiale, its principal features consisting of an arrangement.
of two peculiarly constructed rollers over which a correspondingly constructed
Bieve having the form of an endless flexible band is passed. This endless sieve in.
drawn, either backwards or forwards, through one or more strainers, or receptacles
in such manner that its sides form close joints with the edges of the receptacles so
as to prevent the pulp or like material (which is fed in from any convenient.
receptacle) from passing out. On the outlet side of the sieve is fixed a caulking
and card cylinder, furnished with scrapers.
The appended. drawings illustrate the machine.
Fig. 1 is a longitudinal section of the machine.
Fig. 2 is a oross section, and
Fig. 3 a plan of same.
Fig. 4 is a cross section of the outlet of the sieve on an enlarged scale.
Fig. 5 is a longitudinal section of the same.
Fig. 6 is a cross section of the right side of the upper part of the machine.
Fig. 7 is a section of part of an endless sieve, and
Fig. 8 is a plan of the same.
Fig. 9 shows a modified form of machine having two strainers.
In the machine frame a, the front rollers c and a revolve in the bearings fixed to
the frame, and near the ends of these rollers (as shewn in Fig. 7) are projections.
in the shape of teeth d which fit between the bars e of the endless flexible sieve f
making the sieve move when the rollers are caused to rotate.
The cross barse of the sieve (as shewn in Fig. 7) are formed of some material
which enables their edges to be rolled, pressed, hardened, or polished and these
edges being cut out to form a narrow slit between each adjacent pair of cross bars,.
the paper stuff or other purified and strained material can pass through, and fall
into the receptacle g. The cross bars through their hardness and smoothness are
able to withstand much more wear than pierced or cut plates; the slits cannot 80
easily choke as the fibres of the stuff do not easily etick to the smooth sides.
The slits as shewn in Fig. 8 may extend the whole length of the cross bars; or
as far only as the driving straps; or the slits can be made with a continuing bevel,
and be filled in at the part above the driving straps. Each of the flat cross bars e
on the side which is next the rollers (where the material tends to accumulate) is
rounded off, thus rendering the sieve more flexible, the connecting part being flat..
The driving straps & can be made of steel, brass, india-rubber or the like and are in
general connected by a binge joint at the ends. The under part of the sieve
arrangement is furnished with means for cleaning consisting of a pipe q (from.
which water is forced to impinge upon the bars) and a brush q'. This cleaning
arrangement is very effective as by reason of the flexibility of the lower part of
the sieve the slits between the cross bars are caused to open wider at this point;.
thus facilitating the removal of pieces of material.

page_text: 9.
The sieve slides through the receptacle or strainer g being supported as it is
pulled through by means of the longitudinal bars h on which the driving straps of
the sieverun. The narrow sides of the receptacle or strainer g extend only up to
the sieve und are causod to form a joint in that place by means of pieces of felt t
as shewn in Figs. 1 and 4.
The longitudinal sides wo are higher than the narrow sides and are furnished with
screw bolts u which form a hinge joint for the purpose of strengthening the frame
and preventing the bending open of the sieve.
In the bottom of the strainer g are the plates which rise and fall for the
purpose of sucking up the material in the sieve which flows off over the overflow
rim. The pieces of material which do not pass through the slits are taken up at
the outlet of the sieve by a removable transverse roller m which is supported in
bearings formed in the longitudinal sides of the sieve, and these pieces are removed
by the scraper y.
The roller m is covered with felt, rubber or other similar material.
In order to prevent the water flowing away on the end of the outflow roller
a small pocket of strips of felt n are placed as shewn in Figs. 4 and 5,
As shewn by Fig. 9 the sieve can he pulled through two or more strainers which
latter must be suitably constructed.
The machine may also be worked with a stationary sieve but in this case in
order to clean it the sieve must be drawn out from time to time for a certain
distance over the rollers.
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 :-
1. A machine for cleaning or straining paper stuff, and other like material
consisting essentially of a sieve having the form of an endless flexible band, which
runs over rollers and is capable of being pulled through either backwards or
forwards while the edges form close joints with the sides of the receptacle or
receptacles through which it is drawn, substantially as shown and described.
2. In a machine for cleaning or straining paper stuff, and other like material, the
combination of a receptacle, a sieve having the form of an endless band which runs
over rollers in such manuer that it can be drawn backwards or forwards underneath
the receptacle with the sides of which it forms a close joiut, a roller arranged at
the outlet end above the sieve, and having a scraper for cleaning the same, and
a device for cleaning the idle part of the sieve by means of water jets and brushes,
substantially as shewn and described.
3. For use in a machine for cleaning or straining paper stuff and like materials,
an endless flexible siere formed of a number of cross bars flat upon their outer
sides and rounded upon their inner sides, a slit being left between each two of
these bars, for the passage of the material, and the whole of these cross bars being
joined by means of two or more flexible bands so as to form an endless flexible
Bieve, substantially as shewn and described.
Dated this 22nd day of April 1896.
WILLIAM J. MUNDEN,
106 Priory Park Road, Kilburn, London, N.W.,
Agent for the Applicant.