A Process for Lining Stuffs with Paper Pulp.
Year: 1898

page_text: Date of Application, 12th Feb., 1898-Accepted, 9th July, 1898
COMPLETE SPECIFICATION.
A Process for Lining Stuffs with Paper Pulp.
I, FRIEDRICH HOLTSCHMIDT, of 6, Gieseler, Brunswick, Germany, 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:-
The present invention concerns a new process which, with the special combina-
tion of a canvas impregnated with paper pulp, gives a stuff suitable for cement
bags, or sacks for transporting gypsum chemical manures and the like. With
respect to other combinations of tissue and paper, this new process is distinguished
by the fact that the mass of liquid paper is brought separately from the two sides
on the tissue, after this latter has passed through drawing-rollers, and while it is
in a stretched position, after which the intimate combination is effectuated by com-
pression between the metal rollers.
To attain the proposed result, the mass of paper must be brought separately from
the two sides on the material to form a thin and regular coat and to avoid, defects
in the sacks and to prevent them from losing their necessary suppleness, that is to
say from becoming stiff.
The object of the stretching of the stuff is to draw it out lengthways, to prevent
the bags from bursting while in use. This in fact, would happen, because the stuff
from its nature, stretches out more than the paper and that otherwise the paper
would be exposed alone at the filling of the bags.
The two elements of the bag are exposed to the same wearing, only when they
have almost the same elasticity.
In the annexed drawing a contrivance for the practical working of this new
process is shown.
The mass of paper a has two aprons
c the lower of which is in every point
similar to the aprons of paper machines already known, whilst the upper apron
contracts towards the lower apron and has its extremity inclined towards this latter.
The transversal-moving rollers of the upper apron are moved with those of the
lower apron and rest upon the same frame continuing upwards.
The canvas & before arriving on the clothe c¹ which carries it further, passes
through the drawing-rollers e.
The canvas is stretched on the one side between said rollers e and on the other
side between the paper machine-rollers; the guiding of the canvas from clothe cl
upon clothe 6 is secured by the small roller e¹.
The mass of paper runs, when the machine is set going, on the stretched stuff,
to be carried further with it by the clothe c¹ of the upper apron.
Behind the upper apron, the tissue covered on the top side with paper paste
descends on the clothe b¹ of the lower apron, so that it is then borne between two
coats of paper-pulp, by the clothe 61 on the rollers of the paper machine, where it
is combined with the paper so as to form an indissoluble material,

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
I) A process for manufacturing a canvas lined with paper-pulp, distinguished
by the
mass of liquid paper being brought separately on the two
sides on
the tissue when this said tissue is stretched, the intimate_com-
bination of these elements taking place in passing over the rollers of an ordinary
paper-machine substantially as described.
II) A contrivance for the execution of the process claimed in I, distinguished by
the fact that the upper apron 6 for the mass of paper is inclined towards the
lower apron c to bring the stretched tissue covered with paper-pulp on the mass
of paper of the lower apron, which with the object of obtaining the intimate com-
bination, brings the canvas which is between two coats of paper-pulp on the
rollers of the paper-machine, substantially as described and shown.
Dated this 11th day of February 1898.
1. DUVINAGE,
Agent for Applicant.