Improvements in Calendering Machinery for Paper, or the like.
Year: 1899

page_text: Date of Application, 11th Apr., 1899-Accepted, 13th May, 1899
COMPLETE SPECIFICATION.
*Improvements in Calendering Machinery for Paper, or the like.
I, ALFRED GEORGE BROOKES, of 55 and 56, Chancery Lane, in the County of
London, Chartered Patent Agent (communication from Irwin Peter Dillon, Manu-
facturer, of No. 62, Butler Street, Lawrence, in the State of Massachusetts, United
States of America, and Henry Clay King, Grocer, of No. 361, Lowell Street,
Lawrence aforesaid,) 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:-
My invention is an improvement in paper or like calendering machines.
In the drawings in which I have shown my invention in its preferred details
of construction, Figure 1 is a front elevation of a calendering machine constructed
to embody my present invention.
Figure 2 is a central, vertical transverse section thereof.
Figure 3 is an enlarged fragmentary detail, taken on the line 3-3 Figure 1,
for the purpose of showing the constructional details of the doctor in enlarged
view.
Figure 4 is a horizontal sectional view, on line 4-4, Figure 3 parts being
broken away.
The general arrangement of the calendering machine comprising standards A,
a base A¹, rolls a², head blocks or caps a³, and other general features of construction
not shown, may be and are of any usual or preferred construction.
The doctors, as is well known, are similarly arranged in such machines on
opposite sides of the rolls, alternately between successive pairs of rolls, and I have
therefore deemed it unnecessary to herein show and describe more than one of
these doctors.
On a suitable bearing plate (Figs. 2-4) is mounted a carrier bar b', herein
shown as supported at its outer end on the spindle c of an eccentric cand at its
inner end arranged to slide freely between the plate 6 and a projecting lip or way d
which may be formed integrally with the plate 6 or may be bolted thereto, as
herein shown, at ', an antifriction roll being preferably provided to support
the lower edge of the bar 6', as indicated by dotted lines in the figures.
At its extreme inner end the bar b¹ is vertically slotted, as indicated at 62, to receive
and guide a stud or arm e projecting from an end flange el of the blade or doctor
proper e, said stud being shown as having an anti-friction roll e³ mounted thereon
and provided with curved or crowning peripheral edges, as is clearly shown in
Figure 4.
The doctor is pivotally supported at each end at e on a lever ³, pivotted
intermediate its ends at e to a projection 63, said lever being normally maintained
yieldingly raised at its inner end by means of a spring s engaging its outer end
and supported on a threaded bolt or arm e, carrying a tension nut and pivotted
to the carrier bar at e, although it will be understood that I do not restrict my
invention to this form of means for holding the lever vieldingly in its normal
position, and I wish to add at this point that I do not intend to restrict myself

page_text: herein to any of the details shown and described, but intend to cover the general
constructional features broadly without reference to their precise details.
The eccentric c¹ operated by a handle is enclosed by a strap 3, provided
at its forward end with a rod on which is mounted a springs, bearing at its
forward end against a perforated bearing pivotally mounted in the bar 6', said
rod carrying at its forward end a stop to limit the forward sliding movement
of the bar 6', said bar being slotted at to slide back and forth on the shouldered
spindle of the eccentric, as clearly shown in Figures 3 and 4.
It is frequently desirable to get at a roll readily and quickly, and accordingly
the plate is not only adjustably mounted at 65 in a way g of the support g', but
it is held quickly removable from said support at its lower end by means of a
clamp working in a slot 6 of the plate 6.
By this means the doctor may be instantly released from the roll and swung
entirely back on the bolts 65 as pivots, so that the operator may readily inspect
the nip of the rolls.
A further provision towards the same general end resides in pivotting the usual
directing fingers h on a rod h¹ at the lower part of the doctor, said fingers having
at their upper ends one or more hooks or shoulders to be engaged by a spring
catch h, shown as secured at h to the body of the doctor.
By this construction, either or both sections of said directing fingers may be
quickly swung back and automatically locked out of the way by the spring catch,
said fingers being herein shown as held in an intermediate position by said
spring catch.
Not only is it desirable to be able to swing back any particular doctor, but
also at times it is advantageous to be able to quickly remove all the doctors from
one side of the machine, in order, for instance, to replace a damaged roll.
Accordingly, I have made the end supports gl movable, said supports being
herein shown as pivotted at their lower ends at g and held at their upper ends by
a bolt g carrying a wing nut g and pivotted at g to the cap 3, so that it may be
swung down in position as shown, to occupy a recess 6 provided therefor in the
support.
The operation of my improved doctor is as follows:-
As a roll moves up, let us suppose, at the end adjacent the mechanism shown in
Figure 3, that end of the doctor instantly responds and moves upwardly under
the pressure of the spring s, the doctor being raised by the lever turning on
its pivote, and the roller e travelling readily upwardly in the vertical slot 63,
while at the same time inward movement, if any be required under the circum-
stances, is readily accomplished by the forward pressure of the spring which
moves the bar forward readily on the roller, the slot 6 sliding over the
eccentric pin c, and the curved periphery of the roller et acting as a sort of universal
joint to permit the required movement of the parts.
If the calendering roll should suddenly jump upwardly in parallelism to itself,
it will be evident that the entire doctor will quickly move forward under the
propelling influence of the springs at the opposite end thereof, said springs
instantly sliding forward both of the carrier bars, while at the same time the
levers and their springs aid in holding the doctor tightly pressed against its
roll.
It will be understood that the proper tension will be maintained on the
springs s, s¹,, according to the requirements of the work, the former being regulated
by the nut and the latter by the position of the eccentric c¹.
If anything should happen to the calendering rolls, as, for instance, if the
paper should get caught or a roll should get scratched, the operator can quickly
swing up the fingers h away from the roll, and they will be automatically held
by the spring catch h³ while the operator inspects the roll.
If the accident is serious, the operator can quickly swing the entire doctor out
of the way simply by loosening the clamps 66 and swinging the doctor back and
upwardly on its pivots 65.

page_text: And if the matter is so serious as to require considerable repair or to require
a new roll, the entire series of doctors may be swung down out of the way, with-
out otherwise disturbing the machine, simply by loosening the wing nuts g',
swinging the bolts g³ upwardly out of engagement with the supports or pillars g',
and then turning the latter and their doctors down, out of the way.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what
I claim is
1. In a calendering machine, a suitable support, a carrier moveable in one
direction thereon, a doctor mounted on said carrier and moveable relatively thereto
in a different direction, the resultant of the two distinct movements permitting the
doctor to follow the movements of its roll, substantially as described.
2. In a calendering machine, a suitable support, a carrier yieldingly mounted
thereon, a doctor supported by said carrier, and means carried by said carrier
permitting bodily movement of the doctor relatively to the carrier, substantially
as described.
3. In a calendering machine, a doctor, carriers therefor, said carriers and doctor
bring provided at their adjacent ends with cooperating means for guiding the
doctor in its vertical movement, bearings for said carriers, the latter being move-
able on said bearings to and from the calendering rolls, and means for moving
sa'd doctor vertically relatively to its carriers, substantially as described.
4. In a calendering machine, a doctor, pivotal bearings for the opposite ends of
said doctor, yielding carriers for said doctor and said pivotal bearings, said
doctor having bearings in said carriers independent of said pivotal bearings, and
the latter being moveable independently of said bearings in the carriers, sub-
stantially as described.
5. In a calendering machine, a doctor, pivotal bearings for the opposite ends of
said doctor, yielding carriers for said doctor and said pivotal bearings,, said
doctor having bearings in said carriers independent of said pivotal bearings, and
the latter being moveable independently of said bearings in the carriers, com-
b'ned with means normally tending to move said pivotal bearings away from their
carriers, substantially as described.
6. In a calendering machine, a doctor, pivotal bearings for the opposite ends
of said doctor, yielding carriers for said doctor and said pivotal bearings, said doctor
having bearings in said carriers independent of said pivotal bearings, and the
latter being moveable independently of said bearings in the carriers, combined
with means normally tending to move said pivotal bearings away from their
carriers, and an adjusting device for said means, substantially as described.
7. In a
calendering machine, a doctor, pivotal bearings for the opposite ends
of said doctor, yielding carriers for said doctor and said pivotal bearings. said
doctor having bearings in said carriers independent of said pivotal bearings, and
the latter being moveable independently of said bearings in the carriers, and means
for regulating the yielding tension of said carriers, substantially as described.
8. In a calendering machine, a doctor having at each end a stud or arm, a
carrier having at its inner end a vertical guide to receive said stud and permit the
latter to move freely up and down, a bearing for said carrier, the latter being
moveable on said bearing toward and from the rest of the machine, and means
yieldingly supporting said doctor independently of said studs, substantially as
described.
9. In a calendering machine, a doctor having at each end a stud or arm, a carrier
having at its inner end a vertical guide to receive said stud and permit the latter
to move freely up and down, a bearing for said carrier, the latter being moveable
on said bearing toward and from the rest of the machine, and means carried by
said carrier and yieldingly supporting said doctor independently of said studs,
substantially as described.
10. In a calendering machine, a suitable support, a carrier mounted to slide

page_text: thereon, a doctor mounted on and supported by said carrier, and means normally
holding said doctor and carrier yieldingly pressed against the calendering roll,
substantially as described.
11. In a calendering machine, a doctor, directing fingers pivotally mounted
thereon, permitting said fingers to be turned back from the adjacent calendering
roll, and means automatically holding said fingers in their turned back position,
substantially as described.
12. In a calendering machine, a doctor, supports, stationary bearing plates
on which said doctor is yieldingly mounted, said bearing plates being moveable
relatively to their supports, and clamps normally locking said plates in position
and permitting them to be instantly unlocked, whereby the doctor and its plates
may be moved on said supports relatively to the adjacent roll, substantially as
described.
13. In a calendering machine, a doctor, supports, stationary bearing plates
on which said doctor is yieldingly mounted, said bearing plates being pivotted at
one end to said supports, and clamps detachably holding their opposite ends, the
unclamping thereof permitting said plates and doctor to be swung back from the
adjacent roll, substantially as described.
14. In a calendering machine, a plurality of doctors, a support or pillar for
each end of said doctors, said supports and their doctors being bodily moveable
relatively to and independently of the rest of the machine, and means normally
locking said supports and doctors in operative position, substantially as described.
15. In a calendering machine, end supports for the doctor, one support adjacent
each end of the calendering rolls, said supports being pivotted to the base of the
machine, and means removeably holding the upper ends of said supports in
operative position, substantially as described.
vay
WM.
55 and 56, Chancery
SOKES & SON
Nou, Agents for the Applicant.