Improvements in or connected with Brakes for the Paper Reels of Web Printing Machines.
Year: 1899

page_text: Date of Application, 20th Aug., 1899
Complete Specification Left, 28th May, 1900-Accepted, 14th July, 1900
Date of Application, act Aug. 1
Complete Specification Left, 28th May, 1900-Accepted, 14th July, 1900
PROVISIONAL SPECIFICATION.
Improvements in or connected with Brakes for the Paper Reels of
Web Printing Machines.
I, GEORGE ASHLEY WILSON, of 63, Church Street, Egremont, in the County of
Chester, Engineer, do hereby declare the nature of this invention to be as
follows:-
In web printing machines it is desirable that the tension on the web of paper
being drawn off the reel to be printed should be maintained uniform. This
is however difficult owing to the varying diameter of the reel of paper; and
in operating it is necessary to regulate frequently by hand the pressure of the
brake which is commonly used. This needs constant attention on the part
of the operator and if it is neglected which is often the case the result is
irregularity in feeding the web and great liability to tearing of such web
owing to the tension becoming greater as the reel becomes smaller.
Now the object of my invention is to provide means whereby the brake may be
automatically regulated by the action of the machine, and thus dispense with
continual attention from the operator.
For this purpose I operate the brake, preferably through the medium of spring
connections, by means of a regulating device such as a screw so arranged
that the desired pressure may be put on the brake wheel by hand and as the
reel of paper becomes smaller in diameter by the paper being drawn off such
screw is turned back by gearing so as to reduce the pressure on the brake wheel
gradually, thereby keeping the tension on the web of paper uniform or nearly
so whatever the diameter of the reel. The gearing for turning the screw may
be operated from the spindle of the impression cylinder or other convenient
positively moving part of the machine or from the spindle of the paper ree!
as desired, and the connections are so arranged that they may be thrown out of
gear to allow of regulating the brake by hand, or be automatically thrown out
of gear when the screw has reached the end of its travel.
Other regulating devices than a screw may be employed as for instance a rope
or chain, one end of which is attached to the before mentioned spring conner-
tions of the brake, may be wound on a barrel to put pressure on the brake wheel.
such barrel being capable of being revolved by gearing from the paper reel
spindle or other desired part of the machine so as to pay out the rope or chain
thereby gradually reducing the pressure of the brake; or the brake may be
operated through the spring connections by means of an excentric on a shaft
which can be rotated by gearing from any convenient moving part of the machine
so as to gradually reduce the pressure of such brake.
The regulating screw or other device and gearing are also preferably arranged
so that whatever pressure may be put on the brake wheel at the commencement
of drawing off the paper from the reel such pressure shall be reduced to nil or
nearly so when the paper is nearly all drawn off the reel.
Dated this Twenty-fifth day of August 1899.

page_text: Improvements in or connected with Brakes for the Paper Reels of
Web Printing Machines.
I, GEORGE ASHLEY WILSON, of 63, Church Street, Egremont, in the County of
Chester, Engineer, 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, reference being had to the accompanying
drawings on which like letters indicate equivalent parts in all the views:-
In web printing machines it is desirable that the tension on the web of paper
This
being drawn off the reel to be printed should be maintained uniform
is however difficult owing to the varying diameter of the reel of paper; and
in operating it is necessary to regulate frequently by hand the pressure of the
brake which is commonly used. This needs constant attention on the part
of the operator and if it is. neglected which is often the case the result is
irregularity in feeding the web and great liability to tearing of such web
owing to the tension becoming greater as the reel becomes smaller.
Now the object of my invention is to provide means whereby the brake may be
automatically regulated by the action of the machine and thus dispense with
continual attention from the operator.
On the drawings Fig. 1 is a side view of appliances constructed according to
my invention, and applied to a web printing machine, and Fig. 2 is a plan
of the same.
For the purposes above mentioned and under this form of the invention I
operate the brake a which is formed as part of a lever 6 pivotted on the shaft c
preferably through the medium of a spring connection in the form of a flat
spring by means of a regulating device such as a screw e which works through
a nut fattached to the frame g of the machine. The spring a forms an extension
of and is secured to one arm of the lever b. One end e¹ of the screw bears
on the spring so that when the screw is turned in the direction of the arrow, say
by a hand wheel h, the desired pressure may be put on the brake wheel i by hand.
The brake wheel is secured as usual on the spindle j of the reel of paper k, which
spindle is carried in bearings in the frame g in the usual way. The shaft c is
screwed into the frame g, and is provided with a hand wheel e by turning which
the shaft c can be screwed more or less into the frame g and thereby the reel of
paper can be adjusted laterally as desired, the brake fitting between collars on
the brake wheel. / is a broad flat faced worm wheel loose on the screwed shaft e,
but which after the brake is put on by hand as above mentioned is capable of
being locked to such shaft by a detent m. pirotted to a collar », secured to the
screw and taking into the teeth in the wheel so that such wheel and screw will
turn together. The wheel is also caused by the collars n, o, to move up and
down with the screw e. p is a worm for operating the wheel 7. The worm pis
secured on a shaft y carried in bearings r in a bracket to on a frame g. To
the shaft 9 is also secured a pulley r which receives motion by the belts from
the spindle so that as the reel of paper becomes smaller in diameter by the
paper being drawn off, the screw e is turned back in the reverse direction to the
arrow by the gearing 1, m, n, p, r, & so as to reduce the pressure on the brake
wheel gradually and progressively thereby keeping the tension on the web
of paper k¹ uniform or nearly so whatever the diameter of the reel. The gearing
for turning the screw e, may, if desired, be operated from the spindle of one of
the impression cylinders or from other convenient positively moving part of the

page_text: machine. The detent m is so arranged that it may be lifted out of gear with the
wheel to allow of regulating the brake by the screw e and hand wheel h. Also
the wheel 7 is so carried on the screw e that when the screw e has been turned
back to the end of its travel, the wheel 7 is raised so much that the teeth thereof
are automatically thrown out of gear with the worm p.
Other regulating devices than a screw may be employed as for instance as
shown in Fig. 3 a rope or chain e¹ one end of which is attached to the before
mentioned spring connection d, may be wound on a barrel e carried on a shaft u
mounted in bearings to put pressure on the brake wheel such barrel being
capable of being revolved by gearing 1, p, r, s, as before described from the
paper reel spindle ; or other desired part of the machine so as to pay out the
rope or chain thereby gradually reducing the pressure of the brake; m is a pawl
the barrel e and taking into the teeth of the wheel to allow of the rope e
being wound on the barrel without disturbing the gearing.
ou.
Fig. 4 is a side view and Fig. 5 is a plan of a modification of my appliances in
which the brake is operated by means of an excentric. e is an excentric free to
turn on a pin or stud u, projecting from the frame g. The eccentric bears against
the spring d as shown. h is a lever connected to the excentric and provided
with a pawl m which takes into the teeth on a worm wheel 1, free to rotate on the
stud u. The wheel is operated by a worm secured on a shaft 7 which is
carried in bearings in a bracket to and is provided with a worm wheel operated
by a worm y secured on a shaft also carried in bearings in the bracket r.
The shaft z receives motion by means of a pulley and belts from the spindle ¿
of one of the impression cylinders of the machine. By moving the lever h
and excentric e in the direction of the arrows, any desired pressure may be put
on the brake wheel by hand, the pawl m holding the lever in position, and as
the paper is unwound from the reel the wheel 7, together with the lever and
excentric is moved by the worm gearing, and belt in the reverse direction to the
arrow thereby gradually reducing the pressure of the brake.
Fig. 6 is a side view of another modification. This arrangement is similar to
Fig. 4 excepting that the brake a is pivotally connected to the lever b and the
spring connection is a helical spring d in tension, connected at one end to the
lever band at the other by a pin to an arm or lever e pivotted on the
strut and formed with or attached to a lever h having a pawl m taking into the
teeth of the wheel so that when the lever is moved in the direction of the arrow
as shown pressure is put on the brake wheel i as before described. The gearing
and the operation of the parts for releasing are similar to those described under
Figs. 4 and 5 the lever e acting to the same effect as the excentric in Figs. 4 and 5.
Fig. 7 is a side view of appliances similar to Fig. 6 but with the pulley r driven
by the belts from the paper reel spindle j. In order to vary the extreme tension
of the spring d and therefor the initial pressure of the brake without varying
the angle of movement of the lever and still to reduce the brake pressure to mil
when the reel is unwound, such spring may be connected to the lever e at various
points by fitting the connecting pin into any of the holes at different
distances from the pivot u or the pin d may be connected to a block capable of
being moved and secured in a slot in the lever e by means of a screw or the like.
The regulating screw or other devices and gearing hereinbefore described are
80 arranged that whatever pressure may be put on the brake wheel at the com-
mencement of drawing off the paper from the reel such pressure shall be progres-
sively reduced to mil, or nearly so when the paper is nearly all drawn off the reel.
The above described releasing gear may be used for two or more reels by the
spring d being connected through equalizing levers to several brake levers b
or several independent springs d and levers e and h connected to separate broke
levers may be used in connection with the wheel in any convenient way.
I do not confine myself to the particular arrangements of mechanism shown
as it will be obvious that many modifications of devices may be made, without
departing frome the scope of my invention to effect the same purpose, but

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
First. In web printing machines the combination of a brake for the reel of
paper, mechanism for applying the brake and mechanism automatically and
positively operated from the paper reel spindle or from other convenient posi-
tively moving part of the machine for gradually reducing the pressure of the
brake, substantially as and for the purpose set forth.
Second. In web printing machines the combination of a brake for the reel of
paper, mechanism for applying the brake, spring connections between the brake
and the mechanism for applying the brake, and mechanism automatically and
positively operated from the paper reel spindle or from other convenient posi-
tively moving part of the machine for gradually reducing the pressure of the
brake, substantially as and for the purpose set forth.
Third. The combination with web printing machines of brake appliances and
gear for gradually reducing the pressure of the brake constructed and operating
substantially as described and as illustrated in the drawings.
Dated this Twenty-fifth day of May 1900.
W. B. JOHNSON,
Agent, 4, Clayton Square, Liverpool.