IMPROVEMENTS IN ROLLER - MILLS
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said Theodore Bouwens and
Theodore Voss at the Office of the Commissioners of Patents on the 12th July
1882.
THEODORE BOUWENS and THEODORE Voss both of N° 30 Mark Lane in the City
of London "IMPROVEMENTS IN ROLLER - MILLS"
The pressure which is necessary in roller mills in order to effect disintegration
of the middlings or other milling products during their passage between the rolls
is usually given indirectly by springs or weights acting against the bearings of the
roller shafts and thus the spring of the connections and slackness of the bearings
allow a certain play which in some cases is injurious.
Our invention relates to the construction of roller mills in such a manner that
the required pressure is given directly on the rolling surfaces by the weight of the
upper roller augmented by additional weights placed on the, roller shaft and
revolving with it. These weights may be conveniently made in the form of discs
a less or greater number of which can be placed on the shaft according as less or
greater pressure is required. Such discs may be accommodated within the driving
wheels or pullies of the mill.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Theodore Bouwens and Theodore Voss in the Great Seal Patent
Office on the 12th January 1883.
THEODORE BOUWENS and THEODORE Voss both of N° 30 Mark Lane in the City
of London "IMPROVEMENTS IN ROLLER MILLS"
The pressure which is necessary in roller mills in order to effect disintegration
of the middlings or other milling products during their passage between the rolls
is usually given indirectly by springs or weights acting against the bearings of the
roller shafts and thus the spring of the connections and slackness of the bearings
allow a certain play which in some cases is injurious.
Our invention relates to the construction of roller mills in such a manner that
the required pressure is given directly on the rolling surfaces by the weight of the
upper roller augmented by additional weights placed on the roller shaft and
revolving with it. These weights may be conveniently made in the form of discs
a less or greater number of which can be placed on the shaft according as less or
greater pressure is required. Such discs may be accomodated within the driving
wheels or pullies of the mill.
.
Fig. 1 of the accompanying drawing shews a side elevation of a roller mill
constructed according to our invention, and Fig. 2 shews an end elevation of the
same. A A' are the upper and lower rollers, the lower one A¹ being driven by the
pulley B, while the upper one A is driven from the lower one by the gearing C C.
The shaft D of the upper roller is extended some distance on either side, and is
provided at either end with a number of metal discs E E the number of which is
adjusted according to the pressure. required and which are secured on the shaft by
screw nuts F, so that the weight of these discs together with that of the roller
exert the necessary pressure for effecting the grinding operation, while at the same
time the upper roller A is free to rise slightly in its bearings when any hard
obstruction passes between the rollers.
Instead of driving the lower. roller, the driving pulley may be fixed on the shaft
of the upper roller, in which case the necessary weights may be provided in the
driving pulley itself.
The bearings of the upper roller are capable of accurate adjustment by means of
screws G G so as to insure that the rollers shall be kept in such relative positions
that they will effectually grind. the material passing between them, while they are
at the same time prevented from coming into actual contact.
Having thus described the nature of our invention and in what manner the same
is to be performed, we claim :-
In roller mills, effecting the grinding of the material by the direct downward
pressure of the upper roller aided by the use in combination therewith of additional
weights substantially. as herein described.
In Witness whereof I the said Theodore Voss have hereunto set my hand
and seal this twelfth day of January in the year of our Lord One
thousand eight hundred and eighty three.
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