Improvements in Apparatus for Cooling Paper in a Paper Machine, or for Removing Dust and the like from Paper in Paper Machines, Cutting, Ruling, and other Machines or Apparatus.
Year: 1897

page_text: Date of Application, 22nd Dec., 1897-Accepted, 19th Mar., 1898
COMPLETE SPECIFICATION.
Improvements in Apparatus for Cooling Paper in a Paper Machine,
or for Removing Dust and the like from Paper in Paper
Machines, Cutting, Ruling, and other Machines or Apparatus.
I, LOUIS STAFFEL, of Witzenhausen, Germany, Paper Maker, 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 apparatus for removing dust or chips from
webs and sheets of paper whilst being worked or manufactured in order to raise the
quality of the work produced. The said dust or chips arise on the papers from the
several mineral substances admixed thereto from loosened particles of fibre or pulp
etc. but especially by their being worked by scoring, scratching, perforating, cutting,
severing, etc.
My apparatus essentially consists of a tube or tubes provided with discharging
nozzles for compressed air supplied to the tube or tubes by any convenient means,
say, by a ventilator or an air compressing pump, or from a reservoir containing
compressed air and communicating with the said tube or tubes, and my invention is
not restricted to any special device for supplying compressed air. The tube or tubes
are loosely connected to the stationary air supplying device, in order to allow of their
being conveniently disposed and arranged in any machine and turned on their axis.
My invention is represented in Figures 1 to 8 inclusive of the accompanying
drawing, Figures 9 to 13 showing my invention applied to some of the most
important machines for working or manufacturing paper. Figure 1 is a side view
and Figure 2 a corresponding front and partial sectional view from the right of
Figure 1 of the main feature of
my invention.
Referring to Figures 1 and 2 a tube a closed at one end by a plug d carries spouts
or nipples 6 provided with conical bores and preferably grooved at c, the said grooves
being parallel to the axis of the tube. The tube is held in position by any convenient
means say, by arms or brackets fixed to the framework of the machine to be supplied
with my apparatus and loosely connected to a curved tube f by a screw box c.
are wings mounted, on a fast revolving shaft g of the machine, and a casing i
provided with central openings is fixed to the frame encasing the said wings, thus
forming together with the same a ventilator of well known construction.
There
The discharging end of the latter is connected to tube f by a coupling hose L.
When running the machine, the compressed air will be discharged through the
bores of nipples 6 and directed on the paper m passing underneath them blowing any
dust off the paper. The grooves c thereby assist in laterally spreading the single
streams of air, so as to strike the paper on a continuous zone extending throughout
its breadth and in consequence thereof the whole surface of the paper travelling
underneath the tube a.
If desired to blow off the paper on both sides by only one apparatus of my inven-
tion the features thereof represented Figures 3 and 4 may be made use of

page_text: In the former, Figure 3, tube a is curved at its end n and connected by a screw
box o to another tube a¹ provided with nipples b¹ and extending opposite to tube a.
As the paper m¹ passes between both tubes, it will be blown off on either side.
In the feature of my invention represented Figure 4 the same object is attained
by a forked tubular piece p connected to tube f and carrying by means of screw
boxes e¹, e, parallely extending tubes a², a³, closed at their free ends.
In Figure 5, I have shown a feature of my invention in which the discharging
nipples 62 are inclined to the axis of the tube, the discharged streams of air thus
striking the paper m in an oblique direction as indicated by arrows, and on the whole
extent of its breadth. Besides this a continuous current of air will be produced
taking along with the dust towards the right and the left and delivering it to a dust
collector if desired. Instead of inclining one portion of the discharging nipples
towards the right, and the other portion towards the left it would be sometimes pre-
ferable to give all nipples the same inclined direction and to blow off the dust towards
but one side.
By means of the coupling hose 1, Figure 1, tube a can be conveniently disposed
and arranged in any machine, as the case may be, whilst the loose connection of
tube a with the curved tube piece f effected by means of screw box e, allows of
turning tube a on its axis in order to give the nozzles b the most convenient slope
with respect to the surface and the course of the paper, as represented Figure 6 by
the full line position b and the dotted line positions 61 611 respectively.
Figures 7 and 8 show modifications of my invention in which one and the same
tube is provided with several rows of nozzles 62, 63 and 64, 65, respectively in order to
control several courses of paper m², m³, and m², m³, respectively by means of but
one tube.
It may be observed that my invention is not restricted to that feature represented
in the drawings in which the nozzled tube or tubes are closed at one end and open
at the other end, and connected at the open end with the device for supplying the
compressed air.
It will be obvious that there is no departure from my invention when closing the
tube or tubes at either end and supplying the air through an opening provided at
any convenient point of the tube wall or tube walls.
This may be convenient in special constructions of machines to be supplied with
my apparatus and for special purposes. But as the invention has been generally
described and represented in the drawings, I have not deemed necessary to represent
such special features. On the other hand any person skilled in the art will be
enabled after the description and illustrations given of my invention to adjust the
same to any special machine and purpose.
In Figures 9 to 13 I have illustrated my invention applied to several important
kinds of machines for working or manufacturing paper, its application however not
being restricted to the said machines but intended to any machine in which it may
be useful to blow off the dust before working the paper.
Figure 9 shows a ruling machine provided with my invention. The quality of
work in such machines is highly affected by the presence of dust on the sheets of
paper, and so much the more when the sheets 9 are automatically fed to rollers u, v,
by feed rollers t as represented and commonly, knives fixed to heavy slide pieces 8
serving the purpose to retain the second and the following sheets when the upper-
most sheet is withdrawn and cut on its edge by the knives. By the cuts there will be
produced paper dust on the sheets and the said dust is fully blown off by my
apparatus a 6 placed above the foremost edge of the pile of paper q as the sheets pass
underneath the apparatus their full length when fed to and withdrawn by the
rollers u, v. As the feeding device represented Figure 9 is likewise applicable to
printing presses this figure illustrates at the same time an application of my inven-
tion to such presses.
Figure 10 represents my invention applied to the cutting and rolling-up-device of
As the endless naner hv nassing the circular knives 41 ie
naner machines

page_text: longitudinally severed in strips, paper dust will arise along the cutting lines but
blown off on either side of the paper by the nozzled tubes a 6 of my invention placed
beneath the knives, so that the paper is fully cleansed when reaching the paper roll f
to be rolled up. In the present instance it would be preferable to make use of the
feature of my invention represented Figure 5 to blow off the dust from the middle
towards the right and the left.
To paper making machines my invention is of the greatest importance. For the
usual circular knives of those machines do not only produce a great deal of dust but
will preferably conglomerate the same by its peculiar working so as to assemble
flakes along the cutting lines retained thereto by afterwards damping the paper and
causing waste on its edges by calendering.
Another advantage in paper making machines will be attained by my invention
which consists in that the paper is cooled at the same time by the blast of air the
cooling process thus being largely accelerated and improved.
In printing presses Figures 11 to 13, the quality of work essentially depends upon
the cleanness of the paper and is thoroughly required in fine book and illustrated
work.
Figure 11 represents the rear end of a rotary press in which the endless web
coming from the roll g² is damped in a damping apparatus g' and severed into sheets
after the impression. In this case the paper is to be cleansed before entering the
damping apparatus, and this is effected by the nozzled tubes a, b, of my invention placed
beneath the damping apparatus.
In the rotary press represented Figure 12 the web is severed transversely before the
impression by cutting cylinders 8', 82, provided with longitudinal knives or perforator
blades.
The paper dust thereby produced will be blown off by the nozzle tubes a b of my
invention placed in front of the cutting cylinders both features represented Figure 4
as well as Figure 5 being applicable to this kind of printing presses.
In the stop cylinder press of Figure 13 a nozzled tube a b is placed between the
inking rollers h' and the impression cylinder h² in proximity of the grippers h³, the
cylinder being at rest. As the latter performs its revolution, the sheet to be printed h+
is taken along with by the grippers and cleansed from any dust on the printing side when
passing by the nozzled tube a b. A casing may be provided to keep the dust off
the inking rollers. Another nozzled tube of my invention a¹ 6¹ is indicated Figure 13
opposite to the circular knife 6 in order to remove the paper dust produced by
cutting.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what. I
claim is
1. An apparatus for blowing the dust or paper dust off webs or sheets of paper to
be manufactured or worked, consisting of a tube or tubes provided with one or
several rows of discharging nozzles, and of means for supplying compressed air to
the said tube or tubes, the said means preferably consisting of a reservoir containing
compressed air, or an air compressing or blowing device connected to the said tube
or tubes, substantially as and for the purposes described.
2. In an apparatus of the kind described under Claim 1, means for loosely
connecting the tube or the tubes with the reservoir or device for supplying
compressed air to the tube or tubes, the said means preferably consisting of a
coupling hose in order to conveniently arrange and dispose the tube or tubes in
any machine, substantially as and for the purposes described.
3. In an apparatus of the kind described under Claim 1 or under Claim 2 means
for allowing of turning the tube or tubes on their longitudinal axis, the said means
preferably consisting of screw boxes connecting the tubes to other tubular pieces in
order to conveniently dispose of and incline the nozzles with respect to the surface,
and the course of the paper, substantially as and for the purposes described.
4. In an apparatus of the kind described under Claim 1, or 2, or 3, plates or

page_text: casings for isolating the dust blown off by the apparatus, substantially as and for the
purposes described.
D
of Doombay 1007
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Louis Staffel.