Improvements in or connected with Paper Making Machines.
Year: 1899

page_text: Date of Application, 3rd July, 1899
PROVISIONAL SPECIFICATION.
Improvements in or connected with Paper Making Machines.
.
We, PEDER AXEL HELLSTRÖM, of Inlands Pappersbruk, in the Kingdom of
Sweden, Paper Maker, and JOHN BENTLEY, GEORGE BENTLEY, and JAMES
NUTTALL, Engineers, all of Lodge Bank Works, Bury, in the County of Lancaster,
do hereby declare the nature of this invention to be as follows:-
The object of this invention is to prevent the formation of spots, or imper-
fections in the paper which occur owing to froth, or bubbles, forming on, or in
the pulp. According to this invention air is directed against the pulp in such a
manner as to clear away froth, or bubbles and so prevent the formation of the
said spots, or imperfections. This can be conveniently effected by arranging
immediately behind the dandy roll of the paper making machine, and transversely
of the web of pulp, a pipe perforated at the side next the dandy roll. The said
pipe is connected with a fan, blower, or air compresser, so that, when this is
operated, jets of air are caused to issue from the perforations in the said pipe and
impinge upon the web of pulp as it issues from beneath the dandy roll so as to
clear away froth and bubbles from the said web of pulp.
D
el 1900
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
Improvements in or connected with Paper Making Machines.
We, PEDER AXEL HELLSTRÖM, of Inlands Pappersbruk, in the Kingdom of
Sweden, Paper Maker, and JOHN BENTLEY, GEORGE BENTLEY, and JAMES
NUTTALL, Engineers, all of Lodge Bank Works, Bury, in the County of Lancaster,
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:
The object of this invention is to prevent the formation of spots, or imper-
fections in the paper which occur owing to froth or bubbles, forming on, or in
the pulp.
According to this invention air is directed against the pulp in such a
manner as to clear away froth or bubbles and so prevent the formation of the
said spots, or imperfections. This can be conveniently effected by arranging,
immediately, behind the dandy roll of the paper making machine and transversely
of the web of pulp, a pipe perforated at the side next the dandy roll. The said
pipe is connected with a fan, blower, or air compressor, so that, when this is

page_text: operated jets of air are caused to issue from the perforations in the said pipe and
impinge upon the web of pulp as it issues from beneath the dandy roll so as to
clear away froth and bubbles from the said web of pulp.
The accompanying drawing represents, in Figure 1, in transverse section, and
in Figure 2, in side view, so much of a paper making machine as is necessary to
demonstrate the application of this, invention thereto. A is part of the framing
of the machine, B are suction boxes and C is the dandy, roll. is a fan from the
delivery of which proceeds a pipe E which extends transversely of the machine
parallel with the dandy roll at the side from which the web of pulp passes from
beneath the said roll. The outer end of the said pipe E is closed and the said
pipe is perforated at the side next the said dandy roll. The said pipe E may be
supported in any suitable manner, for example, by hangers from the dandy roll
bearings as shewn. When the machine is in operation and the fan is driven, jets
of air issue from the perforations in the pipe E, as indicated at e, and impinge
upon the web of pulp (indicated at G) as it issues from beneath the dandy roll
with the effect of clearing away froth and bubbles from the said web of pulp.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that wlin
wo claim is:
1. The combination with paper making machines of means whereby air can be
directed against the pulp for the purpose hereinbefore described.
2. In a paper making machine the combination of a perforated' pipe extending
transversely across the machine in proximity to the dandy roll and means for
causing air to issue from the perforations in the said pipe and impinge upon the
pulp as it passes from beneath the dandy roll substantially as herein before
described and illustrated in the accompanying drawing.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.