Improvements in the Construction of Paper Making Machines.
Year: 1891

page_text: Date of Application, 23rd Jan., 1891-Accepted, 28th Feb., 1891
COMPLETE SPECIFICATION.
Improvements in the Construction of Paper Making Machines.
I, WILHELM KITTNER, of Autousthal, Schwarzenberg, Saxony, in the Empire
of Germany, Works Manager, do hereby declare the nature of my said invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
Whereas in paper making machines, the felt coverings, drawn over the upper
couch rolls, are liable to wear away rapidly, and therefor require to be frequently
renewed. This is caused by the friction of the scraper upon the surface of the
couch rolls, whereby the wool is torn from the felt covering. The action of the
scraper also causes the retention and accumulation of paper pulp, sand, and other
objectionable matter, which form grooves or furrows in the covering, and damage
the paper. The scraper is also ineffective in expelling the moisture from the felt
upon the cylinder, and does not properly maintain the necessary pressure upon the
couch roll; in consequence of which much of the water falls upon the paper band
(previously drained to the greatest extent by the strainers) and wets the same
again, which causes the band to pass through the couch press in an insufficiently
drained state; it is then liable to be crumpled and rendered unsightly. Also
ribbed paper, and paper furnished with water marks, do not preserve the required
sharpness of outline produced thereon by the dandy roll, these marks becoming
indistinct, effaced or obliterated. Now the object of my invention is to remedy
such defects.
And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawing, being an elevation of a
portion of a paper making machine.
The invention consists essentially in the substitution of a roller a for the usual
scraper, this being an ordinary cylindrical and carefully turned roller, covered with
a hard india rubber or metal covering. The rotation of the couch roller e
communicates a rotary motion to the roller a. The use of this roller a enables me
to use strips of fine gauze, linen, or other like material upon or over the couch rolle
to protect the same from the wear arising from the use of the naked wire cloth.
The roller a is mounted upon the short armed lever a fitted to the shaft b above
the couch roll, the bearings being screwed upon the lateral couch blocks. The
long arm of the lever may be fitted with an additional weight a², when the roller a
is not sufficiently heavy to afford the necessary pressure.
In practice it sometimes happens that, when starting the machine, or when shifting
the same, paper lumps adhere to the felt coverings. When these are not removed
by the washing water they are arrested by the roller a, which is provided with a
scraper c, which causes the lumps to fall into the receptacle d under the roller a.
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 :-
1. In the construction of paper making machines, the application and use of the
roller a, scraper c, and basin d, substantially as and for the purposes herein before
described and illustrated by the drawing.
2. The general construction, arrangement and combination of the several and
respective parts, together forming my invention of improvements in the construction

page_text: of paper making machines, substantially as herein before described and illustrated
by the drawing.
Did 2-1 TA1901
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.