Improvements in Apparatus for Giving a Barrel or Convex Form to the Peripheries of Rolls or Cylinders, such as are Used in Callenders and in the Manufacture of Paper, Cloth, Linoleum and other Fabrics, or for other Purposes.
Year: 1886

page_text: Date of Application, 20th Dec., 1886.
Complete Left, 25th Jan., 1887.
Complete Accepted, 1st Apr., 1887.
Improvements in Apparatus for Giving a Barrel or Convex Form
to the Peripheries of Rolls or Cylinders, such as are Used in
Callenders and in the Manufacture of Paper, Cloth, Linoleum
and other Fabrics, or for other Purposes.
We DANIEL BENTLEY of Burbage Brixton in the County of Derby Gentleman and
GEORGE BENTLEY and JOHN BROAD JACKSON both of Lodge Banks Works Bury in
the County of Lancaster Engineers and Ironfounders do hereby declare the nature of
this invention to be as follows:-
Where rolls or cylinders of considerable length revolve in their bearings the
weight of the rolls or cylinders themselves causes deflection allowing the portion of
the surface of the periphery of the roll or cylinder which comes uppermost to be
concaved and the portion below to be convexed. This is intensified when other rolls
are placed above and rest on such a roll in which cases the surfaces of the rolls are
only in contact at or fowards the ends so that material passed through the rolls is
squeezed or pressed more at the outside parts than they are at those at or towards the
centre. The object of our Invention is to cause the peripheries of rolls to be made so
curved in their length that the increased central diameter may accurately compensate
for the aforesaid deflection and form a perfectly fitting line of contact and equal
pressure along the whole length of the roll. To accomplish this we apply a motion
(either by a wedge lever or the mechanical equivalent such as a screw, eccentric or
cam) to the bearings carrying the roll whilst it is operated upon by the cutting
grinding or finshing tool or glazer in such a manner that whilst the tool or glazer is
travelling lengthways of the roll the bearings carrying the roll are simultaneously
elevated or depressed as may be required. The following is a method of accomplishing
our Invention.
A wedge is placed beneath the bearing carrying the end of the roll which wedge by
means of a screw is forced in or withdrawn as necessary thus raising or lowering the

page_text: The wedge may be actuated from the leading screw of the machine by means of
geared wheels and a screw in such a manner that if the direction in which the screw
revolves and consequently the direction in which the tool or glazer travels is reversed
the elevating or depressing of the roll bearing is simultaneously reversed but we do
not limit ourselves to reversing simultaneously with the tool or glazer as the mechanism
may for example be arranged to give a double reversing of the roll actuating device
during the traverse of the tool or glazer.
Although we have described the Invention as applied to moving the roll yet we
may apply a corresponding movement to the tool or glazer instead of or in addition
thereto.
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J. HENRY JOHNSON.
47, Lincoln's Inn Fields, W.C.,
Agent for D. Bentley, G. Bentley &
J. B. Jackson.
Improvements in Apparatus for Giving a Barrel or Convex Form
to the Peripheries of Rolls or Cylinders, such as are Used in
Calendars and in the Manufacture of Paper, Cloth, Linoleum,
and other Fabrics, or for other Purposes.
We, DANIEL BENTLEY of Burbage Buxton in the County of Derby Gentleman and
GEORGE BENTLEY and JOHN BROAD JACKSON both of Lodge Bank Works Bury in
the County of Lancaster Engineers and Ironfounders 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 :-
When rolls or cylinders of considerable length revolve in their bearings the weight
of the rolls or cylinders themselves causes deflection allowing the portion of the
surface of the periphery of the roll or cylinder which comes uppermost to be concaved
and the portion below to be convexed. This is intensified when other rolls are placed
above and rest on such a roll in which cases the surface of the rolls are only in contact
at or towards the ends so that material passed through the rolls is squeezed or pressed
more at the outside parts than they are at those at or towards the centre.
The object
of our Invention is to cause the peripheries of rolls to be made so curved in their
length that the increased central diameter may accurately compensate for the aforesaid
deflection and form a perfectly fitting line of contact and equal pressure along the
whole length of the roll,

page_text: To accomplish this we apply a motion (either by a wedge or lever or the mechanical
equivalent such a screw eccentric or cam) to the bearings carrying the roll (or to one
of them) whilst it is operated upon by the cutting grinding or finishing tool or glazer
in such a manner that whilst the tool or glazer is travelling lengthways of the roll
the bearings carrying the roll are simultaneously elevated or depressed as may be
required.
Figure 1 of the accompanying drawings represents a portion of an apparatus for
cutting grinding or finishing rolls or cylinders to which is applied means according to
our Invention for moving the roll to be operated on, the example shewing the device as
applied to one of the bearings from which the application to both bearings will also be
understood-A is the bed plate or table of the apparatus which may be similar in
construction to an ordinary planing machine or lathe bed. On this bed plate or table
is bolted a bracket B provided at with a bearing for one of the journals of the roll D
to be operated on, the journal on the opposite end of the roll being operated in a
similar bearing at the opposite end of the bed A. E is the ordinary screwed spindle
or leading screw mounted in bearings in the bed A by means of which a to and fro
traversing motion is given to the cutting or grinding tool employed for operating on
the roll.
The bearing C is capable of being moved vertically in the bracket B1 which
movement is effected by means of a wedge F placed beneath it which wedge is
connected to a slide F₁ provided with a screw G supported in a bracket H bolted to or
formed on the bracket B the said screw G working in a nut I rotating with the wheel J
with which gears the pinion K fixed to the spindle E. By means of this nut when it
is rotated the screw Gis transversed and the wedge F forced in or withdrawn from
beneath the bearing Cand thus caused to raise or lower the bearing and the end of
the roll D as required so that according to the direction in which the screw E revolves
and consequently the direction in which the tool or glazer is caused to travel the
elevating or depressing of the roll bearing C is simultaneously effected by the insertion
and withdrawal of the wedge I and thus a barrelled or convex form longitudinal will
be given to the roll or cylinder operated on. The nut I may be rotated by any suitable
means other than that shown if desired.
Although we have described our Invention as applied to moving the roll yet we
may apply a corresponding movement to the tool or glazer instead of or in addition
thereto and we wish it to be understood. that we do not limit ourselves to reversing
simultaneously with the tool or glazer as the mechanism may for example be arranged
to give a double reversing of the roll actuating device during the traverse of the tool
or glazer.
Figure 2 illustrates an arrangement in which instead of moving the roll up to the
glazer or cutting tool as in Figure 1. the glazer is moved automatically up to and
away from roll in the following manner. D is the roll to be operated on and
which may be rotated by any suitable means in bearings in the bed A-Fitted to slide
longitudinally on the bed A is a table A¹ the movement thereof being obtained by
means of the leading screw E.
A bracket is fitted to slide on the table A¹ towards and from the roll D which
bracket carries the glazer H which is capable of being raised and lowered in the said
bracket, to suit different sized rolls, by a screw K and handle L. The bracket I is
provided with a nut at i in which works a screw spindle M fitted to turn in bearings
in the table A¹ and driven by means of gearing N from the longitudinal spindle ō,
which may be driven from the screw spindle E or otherwise, so that as the table A' is
traversed longitudinally on the bed A the screw M will be caused to rotate and impart
to the bracket I carrying the glazer H the necessary to and fro motion for giving the
required curved form to the roll D.
Instead of moving the glazer H horizontally as hereinbefore described for giving
the barrel form to the Roll, the slide which carries the said. glazer may be moved
vertically for the same purpose-by automatically turning the screw K which motion
may be effected in a similar manner to that described for rotating the screw M, and

page_text: the latter screw may be employed for adjusting the position of the glazer to suit rolls
of different sizes.
Having now particularly described and ascertained the nature of the said Invention
and in what manner the same is to be performed we declare that what we claim is
First. In apparatus for cutting grinding or finishing rolls or cylinders the com-
bination of means whereby the relative distance between the cutting or grinding tool
or glazer and the roll is varied during the cutting grinding or finishing operation for
the purpose of shaping the roll or cylinder to a barrel convex or longitudinally curved
form substantially as and for the purpose hereinbefore described.
Second. In apparatus for cutting grinding or finishing rolls or cylinders the com-
bination of means whereby the bearings (or one of them) carrying the roll or cylinder
is or are elevated or depressed whilst the roll or cylinder is operated upon by the
cutting grinding or finishing tool or glazer so as to impart to the said roll or cylinder
a barrel convex or longitudinally curved form substantially as herein before described.
Third. In apparatus for cutting grinding or finishing rolls or cylinders a wedge F
or its equivalent traversed or operated by gearing from the parts which operate the
cutting or grinding tool or glazer or otherwise traversed or operated so as to move
the roll or cylinder substantially as and for the purpose of shaping it as hereinbefore
described and illustrated by the accompanying drawing.
Fourth. The arrangements and combinations of parts herein described and
illustrated by Figures 1 and Figure 2 respectively of the accompanying drawing
for the purpose described.
Dated this 25th day of Junv1987