Improvements in Rolls of Roller Mills.
Year: 1891

page_text: Date of Application, 29th July, 1891
Complete Specification Left, 14th Apr., 1-92-Accepted, 14th May, 1892
PROVISIONAL SPECIFICATION.
Improvements in Rolls of Roller Mills.
1. WILLIAM HENRY INCE, of Hayle Steam Roller Mills, Hayle, in the County
of Cornwall, Mill Manager, do hereby declare the nature of this invention to be as
follows:-
:―
This invention relates to improvements in the form of corrugations for the rolls
of roller mills, the object being to produce a granulating surface for the reduction
of grain, such that but little direct flour will be made in the process of reduction,
but a large percentage of broken particles, known as semolina and middlings, will
result therefrom, which latter is essential in making high grade flours.
For this purpose each pair of rolls comprises a slow running roll and a fast one,
the fast roll making 250 to 300 revolutions per minute and the slow one 100 to
120 per minute. The opposing surfaces of the rolls are made more effective by
longitudinal furrows in each of them, and the grain may pass in regular order
through 1, 2, 3, 4 or more pairs of rolls, according to the number of same the
granulating system employed embodies.
The fast roll is corrugated with the ordinary saw tooth corrugation, and can be
worked with either the cutting edge of the corrugation first or the back edge
first, as most suitable. The invention consists in the form of corrugation of the
slow roll. The furrows can be cut parallel with the axis of the roll, or with any
degree of spiral or twist that is necessary, and the number of grooves to the lineal
inch will be from 4 to 12, because as the product increases in fineness in passing
through the successive pairs of rolls, the number of corrugations to the lineal inch
on such rolls must increase in the same ratio.
The apex of the corrugation of the slow roll is about and of an inch wide;
the front edge of the furrow is cut at about a right angle to the axis of the roll,
and the base of the furrow may be made oval up to the apex of the following
corrugation or may terminate in an angular form.
Dated this 29th day of July 1891.
ALLISON BRUS.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Rolls of Roller Mills.
I, WILLIAM HENRY INCE, of Hayle Steam Roller Mills, Hayle, in the County
of Cornwall, Mill Manager, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to improvements in the form of corrugations for the rolls
of roller mills, the object being to produce a granulating surface for the reduction
of grain, such that but little direct flour will be made in the process of reduction,
but a large percentage of broken particles, known as semolina and middlings, will
result therefrom, which latter is essential in making high grade flours.
For this purpose each pair of rolls comprises a slow running roll and a fast
running roll, the fast running roll making 250 to 300 revolutions per minute and
the slow one 100 to 120 per minute, according to the nature of the work to be
done. The opposing surfaces of the rolls are made more effective by cutting
longitudinal furrows in each of the rolls, and the grain may pass in regular order
[Price 8d.1

page_text: through 1, 2, 3, 4 or more pairs of rolls, according to the number of reductions the
granulating system employed embodies.
The fast roll is corrugated with the ordinary saw tooth corrugation, varying in
the number of corrugations to the lineal inch, and the amount of spiral or twist to
the foot in length of roll surface, and such roll can be worked with either the
cutting edge of the corrugation running first or the back edge of the corrugation
first, as most suitable for the work to be done. The surface of the roll above
described is brought in contact with the surface of the slow roll, which has a
corrugation of special form, and the efficiency of this invention is due in great
measure to the differential nature of the corrugations to the lineal inch on the roll
surfaces, and the amount of spiral or twist.
The accompanying drawing shows approximately the relative sizes of the
corrugations of the two rolls of each pair of rolls. The arrows indicate the
direction of rotation.
The fast roll A has the ordinary saw tooth corrugation a, and the number of
such corrugations to the lineal inch, as well as the amount of spiral or twist in
relation to the axis of the roll may vary.
The object of the special form of corrugations of the slow roll B is to expose
the grain as long as possible to the granulating action of the fast running roll.
The furrows of roll B may be cut parallel with the axis of the roll, or with
any degree of spiral or twist that is necessary, and the number of furrows to the
lineal inch will be from 4 to 12, so that in regular order in passing the grain
through 1, 2, 3,.4 or more pairs of rolls, according to the system employed, the
product in passing through the successive pairs of rolls increases in fineness 3. this
being so the number of corrugations to the lineal inch on such rolls must increase
in the same ratio. The width of the surface between each two adjacent
corrugations on roll B is preferably about 2nd of au inch; the front edge 62 of
the furrow is cut at about a right angle to the axis of the roll, and may be
slightly rounded where it joins the surface 6¹, so as to ease the cutting action to
suit some kinds of work; the base of the furrow b may be made oval up to the
surface between it and the adjacent corrugation, or it may join such surface in
an angular form.
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. Forming the slow roll of roller mills with furrows which are separated from
each other by a surface forming the outer edge or periphery of the roll, the front
edge of each furrow joining such surface in a line approximately at right angles to
the axis of the roll, while its rear edge joins such surface in a line which may be
either of oval or of angular form, substantially as and for the purpose specified
and as shown in the drawing.
2. The combination of the slow roll of roller mills having corrugations of the
form set forth in the preceding claim, with a fast roll having corrugations of the
ordinary saw tooth form, substantially as and for the purpose specified and as
shown in the drawing.
Dated this 11th day of April 1895
ALLISON BROS.,
Agents for the Applicant.