Improvements in the Manufacture of Paper for Bank Notes, Securities, and the like.
Year: 1894

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Paper for Bank Notes,
Securities, and the like.
We, CARL BÜTTNER of Eppendorf i/S. in the German Empire and FRITZ WILL
of Königsfeld i/B in the German Empire, both Merchants, 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 produce a paper suitable for bank note paper
and other paper representing values, and possessing the properties required in such
papers such as absolute prevention of imitation and falsification, particular tenacity,
durability, and yielding to the touch.
For this purpose a fine transparent open mesh fabric made of slender but at the
same time strong threads is passed into paper pulp made of the best quality of raw
materials whilst such pulp is moving over the strainer in its passage from the stuff
vat or chest to the couch rolls and before it reaches the latter. The fabric may be
plain or with figures or designs in it.
In this state, the fabric which lies flat upon the strainer, is encompassed on all
sides with pulp and passes through the couch rolls whereupon an intimate com-
bination of the paper pulp takes place between and through the open meshes of the
fabric.
In the drawing Fig. I shews a piece of the open mesh fabric provided with insignia
and numerals and Fig. 2 is a sectional view of the paper on a very enlarged scale,
a being the threads and the paper material. Water marks are made by known
means over the figures, designs, numerals, etcetera so as to render the same trans-
parent. The product is then further treated in the manner of superior quality
paper. The several bank notes, certificates etcetera are then printed in a known
and desired manner by lithographic means, it having to be remarked that owing to
the peculiar property of the paper the impression is obtained with extreme
sharpness and plasticity.
The bank notes, securities, certificates and the like made from the paper of this
invention present above all the advantage of not being imitable for counterfeiting,
as to produce them three different branches of industry must be employed each
yielding some important operation so that it is not practicable to produce counterfeits
approximately imitating such papers. Further, in conjunction with the high degree
of transparence of the paper which allows of the figures, designs, etcetera, in one or
more colours clearly shewing through, the same is very thin and presents a beautiful
soft surface to the touch. Notwithstanding its extreme fineness, its tenacity and
resistance to tearing especially at the creases or folds is incomparably greater than
that of the paper hitherto used for the above purposes which without having been
in circulation for a great length of time will readily tear at the creases or wearing
places.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
A paper for bank notes, securities and the like in which a fine open mesh fabric
with or without figures, designs or numerals is couched or pressed with the fluid
paper pulp substantially as described and shewn.
THOMAS R. SHILLITO,
89, Chancery Lane, London, W.C., Agent for the Applicants.