Improved Wire-cloth for Paper-making Machinery.
Year: 1894

page_text: Date of Application, 4th Jan., 1894
Complete Specification Left, 3rd Oct., 1894-Accepted, 3rd Nov., 1894
Improved Wire-cloth for Paper-making Machinery.
I EMILE CRÉGUT of 95 Boulevard Beaumarchais, Paris in the Republic of
France, do hereby declare the nature of this invention to be as follows:-
The object of this invention is the production of a new metallic fabric or tissue,
suitable for paper-making machines.
This new metallic fabric is composed of series of helicoidal threads, which are
interlaced, and at the point where these helicoidal threads interlace, a straight
thread is inserted, the object of which is to give to the fabric rigidity in the
direction of its width, without interfering with its suppleness in the direction of its
length.
The introduction of the straight threads between the spirals of the helicoidal
threads can be effected by any mechanical means during the manufacture of the
material.
In order to be employed in paper manufacture, the fabric thus obtained is
laminated.
The rigidity given to the fabric by the straight threads is most important, for
they prevent the formation of pockets or folds, and this rigidity in the direction of
its width does not take away any of the suppleness in its length, which is absolutely
necessary to enable the fabric to pass through or over the rollers.
Dated this 4th day of January 1894.
NEWTON & SON,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improved Wire-cloth for Paper-making Machinery.
EMILE CRÉGUT of 95 Boulevard Beaumarchais, Paris, in the Republic of
France, 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 present invention relates to the endless wire-cloth employed in paper or
cardboard making machines, upon which cloth the paper or card being made is
formed and drained.
The wire cloths of the ordinary kind hitherto employed for this object are very
quickly worn out, on account of the repeated bending of the longitudinal or warp
wires over the rollers which carry the cloth. Moreover, the ends of the length of
wire cloth are secured together by stitching which always leaves a mark on the
paper.
These inconveniences are obviated in the new endless wire-cloth, the texture of
which is formed by interlacing helically rolled wires, as shewn on an enlarged scale
in Figs. 1 of the drawing herewith.
The helicoidal wires, being arranged transversely (that is to say, parallel to the
axes of the rollers over which the endless wire cloth is led), hinge one on the other,
and pass over the rollers without becoming bent or distorted.
The joining of the endless web is effected by means of a helicoidal wire, like
those composing the wire-cloth, which is screwed at the same time into both ends,

page_text: so as to join them, as shewn at Figs. 1 (a a) of the drawing. The wire cloth thus
presents a completely uniform surface.
This joining, which can be done by hand, permits of the shortening and lengthening
of the endless wire cloth, by cutting out or adding a piece, without leaving any
mark.
The size of the wire, the diameter of the helix, and its pitch, are three elements
by means of which a variation can be made in the strength of the wire cloth and
its permeability, according to the nature of the paper or card in course of
manufacture.
In order to give to the wire cloth greater rigidity in the direction of its width,
without injuring its suppleness with regard to its length, I can interpose, as indicated
at Figs. 2, straight wires between the helicoidal wires. This addition of straight
wires completely prevents the formation of pockets or folds.
The wire cloth thus made is rolled and stretched into the form shewn at Figs. 1ª
and 24, prior to its application to machines for making paper. The method of
manufacture of the fabric from which the endless wire cloths are made, is described
in the Specification of the Patent of Tourasse, No. 20792, November 2nd 1893.
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. An improved flattened and stretched endless wire cloth intended to replace the
usual wire cloth commonly employed in machines for making paper and cardboard,
the said improved wire cloth being formed by interlacing wires wound into coils or
helices, and arranged transversely to the direction of travel, to permit of passage
over the conducting rollers without damage or undue bending.
2. A wire cloth of the character claimed in Claim 1, in the coils of which are incor-
porated straight wires, for the purpose of giving to the web rigidity as regards its
width, without injuring the flexibility as regards its length, the said wire cloth being
flattened and stretched before use in the paper machine.
Dated this 2nd day of October 1894.
NEWTON & SON,
Agents for the Applicant.