the manufacture of raper.
Year: 1887

page_text: Date of Application, 18th Apr., 1887.
Specification Accepted, 1st July, 1887.
the manufacture of raper.
1 CAMILLE BARATAUD of Bouchet, Haute-Vienne, France, Paper Manufacturer,
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 has for its object an improved machine or apparatus for the reduction
of straw cuttings or stuff and other fibrous material for the manufacture of paper,
and has reference to a cylinder rotating within a cylindrical shell or casing, the two
being of special construction as described below.
In the accompanying sheet of drawings Fig. shows the apparatus in vertical
section along its axis, with a portion of the cylinder in elevation. Fig. 2 shows a half
vertical cross section, and a half front elevation of the discharging end.
The straw cuttings or stuff diluted as desired, enters the machine by the opening A
and is discharged by the opening A¹ where there is a small sluice-valve B for the
purpose of regulating the discharge.
The cylinder is constructed as follows:
On the axis a are mounted end discs C, D and intermediate discs EE; on these
there are arranged helicoidal blades b, b in groups or series F F.
the end discs CD and upon the intermediate discs.
"
bearing upon
Their extremities are recessed to receive the circular projections c, d, of the discs,
of which the one C may be tightened by means of the nut H.
Wedges or keys e, e
with extremities recessed similarly to the blade bb and
engaging with the projections c, d, separate the various blades b, b of each series from
each other. The intervals existing in the periphery of the cylinder are filled by lathes
or pieces of wood J, J, extending from the disc C to the disc D and wedging up the
series of blades and filling up the spaces between them.
The shell or casing is preferably in two parts, joined together by means of straps,
independently of its two covers; it is traversed by the shaft and forms together
with it a frame resting on brickwork. It is constructed as follows;
In the longitudinal slots are arranged plates I, I, of metal or other hard substance,

page_text: by preference sandstone or granite, the concentric internal surface of which is capable
of being made smooth and is preferably cut to a helicoidal thread, forming continuous
scissor-like blades with the helicoidal blades b, b . ., of the cylinder.
.
These plates are maintained in their setting by means of wooden wedges K, and
can be advanced towards and maintained against the blades b, b of the cylinders, as
desired, by means of regulating screws f, f, and stop screws g, g.
The surfaces L comprised between each two plates I I may be left smooth, but the
reducing action is improved by cutting, on about half their length, a triangular thread,
which retains the flow of the stuff and causes it to pass between the blades b, band the
plates I, I, where it is subjected to a grinding, shearing & crushing action somewhat
analogous to that which takes place by causing the thumb and forefinger to rub or
slide over each other, but quite different from the action which takes place in similar
apparatus which cut or tear by means of digging blades, or blades arranged like the
teeth of combs and engaging each blade by the side of another. G G are pieces
of metal secured to the discs E; they serve to maintain the pieces of wood J in
place.
Having now particularly described & ascertained the nature of the said invention
& in what manner it is to be performed, I declare that what I claim is :-
1. In a machine or apparatus for reducing material for the manufacture of paper
a cylinder around which are wound in the form of elongated helices, radiating blades
such as b, b, arranged in groups separated by spaces, working in combination with a
casing in which are movable radiating plates such as I. I., and triangular threads cut
in the spaces L. L. between such plates substantially as described and shewn.
2. The improved machine or apparatus for reducing material for the manufacture
of paper constructed, arranged, & operating substantially as described with reference
to the drawings.
Dated this 18th day of Anril AD 1887