Year: 1899

page_text: Date of Application, 17th Jan., 1899-Accepted, 25th Feb., 1899
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
In machines used in the manufacture of paper and the like a considerable
number of spraying tubes are employed for the purpose of rinsing the wire-cloth
or felts and carrying sheets or for moistening etc.
The spraying devices consist generally of simple round tubes provided with
one or two longitudinal rows of small holes or perforations. These small holes
being always placed on the circumference of the tube, the water, and with it
the impurities contained therein are driven directly towards them, with the result
that they constantly become choked or plugged up, and when the impurities
become formidable on account of their quantity or quality, they are likely to
interfere with the regular working of the machine and to cause trouble.
The object of this invention is to produce tubes that will remedy these draw-
backs. The tubes according to this invention are characterized by the form of
their cross-section, differing from the ordinary spraying tubes which are per-
forated in any part of their circumference in that the perforations are located along
and at or near the top of a longitudinal ridge or inward projection, such top
pointing towards the centre of the tube.
In the accompanying drawings,
Fig. 1 represents a cross section of a tube of this kind.
Fig. 2 shows a tube of the same principle but made in two parts; a split or
part-tube A, and a bent additional strip B.
Fig. 3 is a cross section of another form on the same principle illustrating a
variation in the position of the holes, the tube in this figure being shown as of
two equal halves, A, B, the latter having an inwardly bent portion.
Fig. 4 shows a part located at the entry of the spraying tube and acting as a
filtering chamber.
A represents the tube, B the ridge or projection towards the inside of the tube,
C one of the small orifices. In Fig. 1 the ridge is shown as formed by a simple
pressing inwards of part of the circumference of the tube and the impurities,
instead of being driven against the orifice accumulate in the bottom of the
hollows D.
The holes when pierced or drilled from the outside towards the inside are apt
to render the interior of the tube rough round the edges of the holes, and are
thereby more liable to become blocked, and this is especially the case when large
orifices are employed; in order, then, to be able to pierce the holes from the
inside to the outside, the tubes may be constructed in two parts as shown in
Figs. 2 and 3.

page_text: In Fig. 3 the holes are placed on each side of the top of the arch close to the
top in order to obtain a cross action of the jets.
In Fig. 4 the tube is shown as being provided at its entrance with a cham-
ber Facting as a filter constructed of two cups joined together at their rims and
holding between them a filtering device which may be either a perforated metallic
sheet, a filter cloth or other filtering material. A valve may be provided, as
shown, for use in removing the matter stopped by the filter.
Having now particularly described and ascertained the nature of this invention
as communicated to me by my foreign correspondent and in what manner the
same is to be performed, I declare that what I claim is :-
1. A spraying tube for use in the manufacture of paper and the like provided
with perforations at or towards the top of an inward projection or ridge whereby
the impurities contained in the water are caused to accumulate in the recesses
formed between the sides of the ridge and the wall of the tube.
2. A tube of the kind described constructed in two or more parts one of them
being provided with an inward projection or ridge.
3. A tube of the kind described provided at its entrance with a filtering device
substantially as described.
4. A construction of spraying tube for use in the manufacture of paper and the
like substantially as described and illustrated in Figure 1 or in Figure 2 or in
Figure 3 or in Figure 4 of the accompanying drawings.
Dated this 17th day of January 1899.
BOULT & WADE,
Agents for the Applicant.