Improvements in Drying and Calendering Apparatus.
Year: 1894

page_text: COMPLETE SPECIFICATION.
Improvements in Drying and Calendering Apparatus.
I, AUGUSTE CHANTRENNE, of Nivelles, in the Kingdom of Belgium, Builder,
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 relates to improvements in drying and calendering apparatus for
use in paper mills, bleaching houses, dye works and similar industries.
In order that my said improvements may be properly understood I will herein-
after describe the same with reference to the accompanying drawing, in which
Figure 1 shows a diagrammatical side view of a drying and calendering
apparatus.
Figure 2 is a front view of the same.
Figure 3 represents a side view of my improved scraper drawn to an enlarged
scale shewing the mechanism for reciprocating the same.
Figure 4 is a front view of the same.
Figure 5 is a plan of the scraper, and mechanism connected therewith and
Figure 6 is a section of the scraper on line x, a Figure 4.
The drying and calendering apparatus shown in the accompanying drawing is
principally composed of two drying cylinders A, B made of different diameters
and heated by steam. The largest cylinder A serves for drying the paper,
fabric or the like and the smaller cylinder B for drying the endless felt or
apron G while giving the materials to be dried a certain degree of calendering,
which is obtained by pressing the cylinder B more or less strongly against the
cylinder A with the aid of an elastic pressing device.
Nine iron rollers C¹, C, C³ C³, C4, C', C, C², C³ guide, regulate and stretch
the endless apron G.
The endless apron G surrounds the drying cylinders and conducts the materials
to be dried and calendered.
A table D is placed in front of the apparatus and provided with a sheet of
copper upon which the materials are spread before being introduced between the
endless apron G and the cylinder A. Figure 1.
Another table E is placed at the rear part of the apparatus and is designed to
receive the materials which have passed through the apparatus Figure 1.
I provide the apparatus with a scraper H, Figures 3, 4, 5 and 6, which
compels the dried and calendered materials to leave the cylinder A. and follow
the endless apron G while removing the filaments or any impurities which may be
upon the cylinder.
This improved scraper, which forms the principal feature of my said invention,
comprises a hollow cross-piece H of cast iron, see Figure 6, provided at its lower
part with a bevelled steel blade I bearing upon the drying cylinder A and
concentric with the roller C which guides the endless apron G. A copper plate J
likewise concentric with the roller and fixed to the scraper or cross-piece H is
perforated with a number of small holes J. One of the extremities of the hollow
cross-piece H is provided with a nozzle P Figures 4 and 5 to which is attached a
regulating cock R and an indiarubber pipe connecting it with a fan not shewn in
the drawing. The air forced into the interior of the scraper through nozzle P will,
by reason of the velocity which it acquires on passing through the small holes Ji
made in the plate J, cause the dried and calendered material, which has just been
detached from the cylinder A by the blade I, to be applied perfectly to the endless
apron G which conveys it to the table E. This scraper receives a to-and-fro

page_text: movement in order to enable the cylinder to be perfectly cleaned while producing
a regular wear of the cylinder and of the blade.
end
The means for effecting the reciprocating movement of the scraper are shown in
Figures 3, 4 and 5 in which N is a bracket attached to the framework of the
machine and provided at its extremity with a boss N³. Through the said boss is
passed a spindle which has at its lower end a worm wheel N₁ and at its upper
a disc N'. The disc N' is provided with a projection n fitting in a die n' which
works in a slot n³ in an extension n³ on the arm M¹ attached to the boss M of the
scraper. Gearing with the said worm wheel N¹ is a worm O driven by means of
the pulley O', the worm and pulley being carried in an extension on the boss N
so that when motion is imparted to the above mentioned pulley O' the scraper
is reciprocated, the arm M₁ sliding in a guide M' provided on the frame-work of
the machine.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
First. In drying and calendering apparatus the employment of a scraper or
cross-piece H compelling the dried and calendered materials to leave the cylinder A
and follow the endless apron G while removing therefrom the filaments or the
impurities which may be upon the cylinder, the said scraper comprising a hollow
cross-piece of cast iron or other metal, provided at its lower part with a bevelled
steel blade bearing upon the drying cylinder; a plate of copper or other metal,
fixed upon the scraper and adapting itself to the form of the roller carrying the
endless apron, the said plate being pierced with small holes to serve for the passage
of air; and a regulating cock placed at one of the extremities of the hollow cross-
piece and serving to regulate the admission of air to the interior of this cross-piece,
the air being conducted from a fan or like apparatus through a pipe of india-rubber
or other material.
Second. The arrangement hereinbefore described by which the air arriving at
any desired pressure in the interior of the hollow cross piece compels the dried
material to remain applied to the roller carrying the endless apron and to follow
the latter in its movement.
411
1001
Daicu vuis
17th day of January 1904.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.