Improvements in Apparatus applicable to Paper Machines for Drying the Paper.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Apparatus applicable to Paper Machines for Drying
the Paper.
I, ALFRED MAX BOTTGER of Dueren, in the Empire of Germany, Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to certain improvements applicable to that class of
paper making machines, in which the paper is made in long continuous lengths,
and has for its object, the more effectual drying of the paper as it is delivered
from the paper making machine; also to so arrange the felt aprons or belts used
for supporting the web of paper in the drying apparatus in sections, in such a
manner that, should any portion become damaged, the damaged section can be
readily replaced without having to provide a new felt for the entire length of the
machine.
In carrying out my invention, I mount a series of heated drying cylinders in
suitable frames, and resting upon each pair of the said drying cylinders, I place
another cylinder, for the purpose of obtaining rapid and effectual drying by con-
ducting the paper in an uncovered condition over the supporting belt of felt as
it passes over the top cylinder, thereby facilitating the evaporation into the
atmosphere of the liquid in the felt and paper.
The web of wet paper as it leaves the paper making machine, is conducted to
the drying apparatus and deposited on one section of the felt belt, and is passed
over a portion of the circumference of the first drying cylinder between the felt
and cylinder; on leaving which, the felt and paper pass over an upper cylinder,
the paper being then exposed to the atmosphere, the paper afterwards passes over
and in contact with a portion of the circumference of the next bottom cylinder;
thus by these means, both sides of the paper are dried by the heated cylinders.
This process of drying is continued throughout the range of the top and bottom
drying cylinders comprising the machine, each belt of felt passing over a portion
of the circumference of the two bottom drying cylinders and over the top cylinder,
and is further supported by small carrying rollers, so placed as to form a loop
of the felt under the bottom of one of the drying cylinders, below the point at
which the felt leaves the cylinder, thereby forming a support on to which the
paper would fall and be conducted forward to the next drying cylinder should it
by any means be torn.
One continuous felt belt is arranged for each top cylinder, covering part of the
opposite circumference of each adjacent bottom cylinder, the felt belt extending
beneath and to the front of the bottom cylinder of each series of cylinders.
According to this arrangement each section of felt is dried of the moisture
absorbed from the wet paper, by the cylinders at the same time as the paper is
dried, and by the top cylinders resting upon two bottom cylinders, no special
framework is required for supporting same, the guiding of the top cylinders
being accomplished by flanges one at each end, overlapping the ends of the bottom
.

page_text: cylinders, thus forming guides not only for the top cylinders but for the felt belt
and paper also.
Dated this 28th day of January 1897 °
JOHN WAUGH
Agent
Improvements in Apparatus applicable to Paper Machines for Drying
the Paper.
I, ALFRED MAX BUTTGER of 20 Tivolistrect Dueren, in the Empire of Germany,
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:-
This invention relates to certain improvements applicable to that class of paper
making machines, in which the paper is made in long continuous lengths; and
has for its object, the more effectual drying of the paper as it is delivered from
the paper making machine; also to arrange the felt aprons or belts used for
supporting the web of paper in the drying apparatus in sections, so that should
any portion become damaged, the damaged section can be readily replaced without
having to provide new felt for the entire length of the machine.
In describing my invention in detail, reference is made to the accompanying
sheet of drawings representing a diagramatic view of a drying machine arranged
in accordance with my invention.
In carrying out my invention, I mount the axles of a series of heated drying
cylinders A. on suitable frames, and resting upon each pair of the said drying
cylinders, is another cylinder B. for obtaining rapid and more effectual drying by
conducting the paper C. in an uncovered condition over the supporting belt of
felt D. as it passes over the top cylinder B, thereby facilitating the evaporation
into the atmosphere of any liquid in the paper C. and felt D.
The web of wet paper C. as it leaves the paper making machine, is conducted
and deposited on one section of the felt belt D. and passed over a portion of the
circumference of the drying cylinder A. between the said cylinder and section of
felt D. On leaving the drying cylinder A. the felt and paper pass over an upper
heated cylinder B, the paper being on the outside of the felt exposed to the atmo-
sphere.
After leaving the upper cylinder B. the paper passes over and in contact with
a portion of the circumference of the next bottom heated cylinder A', thus by
the paper passing over the lower and upper heated cylinders, both sides are dried,
that is to say, one side of the paper is dried by contact with the lower cylinders A.
to A5. and the other side on passing over the top cylinders B. to B. in the latter
case, the respective sections of felt D. intervening between the heated cylinders
and web of paper..
This process of drying is conducted throughout the range of the top, drying
cylinders B. to B. and bottom cylinders A. to A5. comprising the machine shown,
each top cylinder being provided with a belt of felt D. passing over a portion of
the circumference of two bottom drying cylinders, the said belt of felt being
further supported by small carrying rollers G. and H. so placed as to form a
of felt under one of the bottom drying cylinders, thereby forming a support on
loop
to which the paper would fall and be conducted forward to the next drying
cylinder should it by any means get torn.
Que continuous belt of felt D. is arranged for each top cylinder, covering part

page_text: of the circumference of the bottom cylinders upon which it rests, the felt belt
extending beneath the one in front of the other bottom cylinder of each pair.
According to this arrangement each section of felt belt is driod of the moisture
absorbed from the wet paper, by the heated cylinders at the same time the paper
is dried, and by the top cylinders B. to B. each resting upon two bottom heated
cylinders, no special framework is required for supporting the former, the guiding
of the said top cylinders being accomplished by flanges J. one at each end over-
lapping the ends of the bottom cylinders, thus guiding not only the top cylinders
but the paper and the respective felt belts also.
I do not confine myself to machines having the number of drying cylinders
shown, as it will be obvious, machines may be made of different lengths by cou-
structing them with more or less heated cylinders without departing from the
nature of my invention.
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be. performed, I declare that what I claim is :--
1. Apparatus for drying paper in which the paper is conducted in an uncovered
state over the top drying rollers mounted between and supported upon two
bottom drying rollers, substantially in the manner as shown and described.
2. Apparatus in which one drying roller is supported by and revolves upon two
drying rollers combined with a belt of felt passing over a portion of the circum-
ference of the same and supported in a manner that after passing over the largest
possible sections of the drying rollers, the felt is conducted somewhat in a horizontal
direction into such position that should the web of paper be torn, the next belt
of felt will take it up and conduct it to the next series of rollers.
Dated this 21st day of October 1897.
JOHN WAUGH
Agent