Improvements in Calendering Machines.
Year: 1898

page_text: Date of Application, 7th Apr., 1898-Accepted, 14th May, 1898
Improvements in Calendering Machines.
I, JOHN DOWNHAM, of Barnbrook Iron Works, Bury, in the County of Lancaster'
Machinist, 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 :-
It refers more particularly to that class of calendering machines in which it is
necessary to raise the upper cylinder or bowl some distance from the lower at
different intervals, so as to allow of the passage between them of thick ridges or
fringes, (as in window blinds and the like,) and has for its object a more ready and
automatic accomplishment of this process than has hitherto been possible.
To accomplish this, I fit across the front of the frame of the machine in suitable
bearings a suitable shaft upon which runs a suitable loose pulley driven from any
convenient power pulley.
This loose pulley can be connected or geared to the shaft at any time by means
of a suitable clutch attached to and sliding on the shaft and actuated by means of a
suitable handle under the control of the workman.
On the end or other convenient part of the shaft is keyed a suitable pinion wheel
which takes into a larger toothed wheel keyed upon another shaft, upon which are
also keyed two or more suitable cams or projections which, upon the rotation of the
shaft, lift the sliding stirrups or bearings in which the shaft of the upper cylinder
or bowl works, to the requisite height to allow of the passage of the fringe or other
raised portion of the goods being calendered between the two cylinders or bowls
without injury; upon arriving at the requisite height, the further rotation of the
cam shaft is stopped by means of a suitable projection keyed upon the cam shaft,
which comes in contact with and disengages the clutch of the first shaft from the
loose driving pulley, the upper cylinder or bowl can thus be left suspended as long
as required by the workman who again brings it into gear by connecting the clutch
with the loose pulley by means of the operating handle beforementioned, the recon-
tinued rotation of the cam shaft lowering the upper cylinder or bowl upon the lower
in position for working.
The necessary set or pressure to the upper cylinder or bowl is given by means of
another cam shaft above the shaft of the upper cylinder or bowl, two or more cams
keyed upon which give the necessary pressure, (which is supplemented when
required by weights, levers, or the like). This cam shaft is connected by suitable
toothed wheels with the raising cam shaft and the pressure is thus automatically
removed to allow of the rise of the upper cylinder or bowl, and restored as it sinks
again to its place.
Referring to the drawings sent herewith :-
Fig. 1 is a side view, and Fig. 2 a cross section of the improved apparatus.
a indicates the loose driving pulley, running upon shaft b with which it can be
connected by sliding clutch c actuated by operating handle c 2. Keyed upon the
end of shaft bis pinion taking in larger toothed wheel e keyed upon cam shaft f
upon which are also keyed raising cams 99 which raise by their rotation the
stirrups h of the upper cylinder until projection k on shaft f comes in contact

page_text: with sliding clutch c disengaging it from loose pulley a and so stopping upper
cylinder at its highest position, until clutch c is again geared into pulley a by
means of operating handle c2 by the workınan, when the recontinued motion of
the cams gg lowers the upper cylinder i until it again rests upon lower cylinder
and continues its work projection then disengaging clutch c from driving
pulley a.
Pressure is given to upper cylinder i by means of cams m m keyed upon shaft n
and connected by toothed wheels o and p with raising cam shaft g g so as to rotate
with it and remove the pressure as upper cylinder i rises.
my
Having now particularly described and ascertained the nature of said
invention and in what manner the same is to be performed, I declare that what I
claim is
The combined apparatus, substantially as described and shown hereinbefore and
in the accompanying drawings, for the purpose set forth.
JOHN HENRY TOPHAM,
7, South Corridor, Royal Exchange, Manchester, Agent to Applicant.