Year: 1888

page_text: 1, ANTONIO DIANA. (formerly Lewis) of Lesa in the Kingdom of Italy Paper
Manufacturer 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 :-
Up to the present time, when manufacturing thin or thick paper or thin or thick
card board with two faces of different colours or qualities by means of the paper".
making machinery with flat or horizontal table, recourse has been had to two endless
wire gauze webs arranged one above the other, the two webs forming two distinct
tables.
•
The two different pulps of which the paper or card board with two faces is composed,
are distributed separately, the one upon the lower web, and the other upon the upper
web, and are united together as the two webs pass under a single pressing cylinder,
known under the. name of the "wet press."
According to my present invention I manufacture all kinds of thin or thick paper
or thin or thick card board with two different faces by means of the ordinary endless
paper machine having a single flat table with a single wire gauze web, without requiring
a second metallic web.
For this purpose, according to my method for producing thin or thick paper, or card
board of any required thickness of two faces of different colours or materials, I prepare
the two pulps separately and cause the one of them to pass on to the wire gauze web
in an almost liquid condition; this I allow to drain off sufficiently, and I then cause.
to pass uniformly upon the whole surface of the layer thus produced in any suitable
known manner the second pulp also in liquid condition. The water drains off from
this layer through the first layer, and the paper or card board with two different faces
is thus formed directly, the subsequent operations thereon by the machine being
generally those followed in the ordinary manufacture of paper or card board.
In order to facilitate the draining off of the water contained in the pulp, the flat
table paper machines, are at present provided with suction cases placed under the wire
web, and I have found, that the space between two of these suction cases is a suitable
point for the distribution or superposition of the diluted second pulp (which is almost
liquid).

page_text: My method of manufacture not only serves to provide thin or thick paper or card
boards with two faces, but it may even serve to produce thin or thick paper or
card board with a single face, that is to say, of a single colour and quality of pulp,
formed with superposed layers, according to my method. And thus according to my
method, thin or thick paper and card boards may have their faces coloured by the simple
superposition of the colouring liquid.
I would observe that the distribution of the second liquid pulp can be effected in the
same way, though the first layer, instead of being situated upon a wire gauze web, is
situated upon a felt or other non-metallic web.
The invention consists in the super-position of a liquid pulp upon another wet layer
of pulp which has already sufficiently drained off, and which is situated upon the said
web of wire ganze, felt, or other suitable tissue, the said layers of pulp in uniting,
forming thin or thick paper, and thin or thick card board with two different faces, or
with similar faces.
The superposition of the pulp or colouring liquid may also be made when the first
pulp, sufficiently drained off, has been applied to a telt or other non-metallic web.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what I
claim is :-
1. An improved manufacture of paper or card board composed of two combined
layers of pulp produced by first running the one layer upon a suitable web and after
allowing it to drain off, causing the second layer to run upon the first layer, substan-
tially as herein described.
2. The process substantially as herein described of causing two different descriptions
or two separate quantities of paper or card-board pulp to pass successively in a liquid
condition upon a single continuous web, in order to obtain thin or thick paper or thin
or thick card-board having two different faces or formed of two layers of the same
material, by means of ordinary endless paper machines having a single endless web,
that is to say, without any absolute necessity, for a second web substantially as and for
the purposes herein set forth.
Dated this 20th day of December 1888.