A Process for the Manufacture of Cellulose Wadding.
Year: 1891

page_text: Date of Application, 19th Feb., 1891
Complete Specification Left, 16th Nov., 1891-Accepted, 19th Feb., 1892
PROVISIONAL SPECIFICATION.
A Process for the Manufacture of Cellulose Wadding.
I, JACOB FEIRABEND of Niedernhausen in Taunus, Hessen, Nassau, Prussia,
Papermaker do hereby declare the nature of this invention to be as follows:-
This invention relates to the production of cellulose wadding from wood or other
vegetable fibres. The wood or other fibrous material, having been boiled under
pressure and washed and if necessary broken up or otherwise comminuted and
colored or dyed, is submitted to the action of a rag engine whence the pulp is
passed in a very attenuated or dilute condition to a paper-making machine whereby
a loosely-coherent web-like tissue or mass is produced and is received or collected
upon a board or table in front of the drying cylinder whence the mass is conveyed
to a drum. When the mass has attained a certain thickness it is taken from the
drum and cut into sheets or bats and subjected to pressure. Or the web-like
mass may be taken from the table or board and transferred to frames of various sizes
and pressed.
The product obtained resembles cotton wadding or carded cotton for which it
forms an efficient substitute for various purposes. The cellulose wadding thus
prepared is superior to the cotton wool or wadding hitherto employed, as it affords
considerably more protection for packing and other purposes against atmospheric
influences, and when prepared for surgical purposes it is absolutely pure.
Dated this 19th day of February 1891
JACOB FEIRABEND,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
A Process for the Manufacture of Cellulose Wadding.
I, JACOB FEIRABEND, of Neidernhausen in Taunus, Hessen, Nassau, Prussia,
Papermaker, 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 :-
This invention relates to the manufacture of cellulose wadding from wood pulp
or similar fibrous material.
For this purpose wood pulp such as that brought into commerce from cellulose
factories or similar vegetable substance if not sufficiently clean and soft, is boiled,
under pressure and is then introduced into rag engines, such as those used in
paper making, wherein it is comminuted and beaten up with water and if
necessary repeatedly washed and eventually colored or dyed. The treatment is
continued in the rag engines until the cellulose is completely suspended in the
water. The material is then placed in vats provided with mechanical stirrers and
sufficient water is added to bring it to a very attenuated or dilute condition.
The turbid fluid is now ready to be supplied to the cellulose wadding machine,
illustrated in Figure 1 of the accompanying drawings, to which it is conveyed
at A whence it runs on to the endless wire-cloth strainer B. From this the wet
sheet or tissue is taken up by the endless apron D and transferred to the drying
cylinder E around which it is lapped and from which when dried the flimsy
cobweb-like tissue is removed by the felt-covered scraper F which scrapes it off,
crinkles it and deposits it in a crinkled loose mass into the shoot G. From this shoot
it is fed to the revolving drum H, upon which the crinkled gauze like tissue or
[Price 8d.]

page_text: material becomes lapped, the successive layers being pressed together by the
roller K until a sufficient thickness is attained. It is then cut and removed and
eventually pressed again and thus forms a finished bat or sheet of cellulose
wadding which can be cut into slabs as desired.
If it be required to produce the bat or sheet of wadding of a certain size and
thickness, it may be delivered by the shoot G into rectangular frames (such as
shown in Figure 2) supported at a suitable height, the wadding being consolidated
therein by a weighted cover placed upon it whereby the finished slabs of wadding
are obtained. The flimsy gauze like tissue being a mere network with innumerable
holes or meshes the mass produced by superposing many layers remains readily
permeable by air or gases for which reason it is highly suitable for many purposes
for which cotton wool is now used.
Cellulose wadding is superior to cotton wool or wool wadding for packing or
wadding purposes, because it affords more protection against atmospheric influences
and, when made for medical and surgical purposes, it is absolutely pure.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to he performed, I declare that what. 1
claim is-
1st. The method of producing wadding from wood pulp or other cellulose, in
the form of a flimsy or loosely coherent cobweb-like tissue or sheet, substantially
as herein specified.
2nd. The method of producing cellulose wadding by superposing and pressing
together a number of the loosely coherent crinkled sheets of cobweb-like tissue to
form slabs or blocks, substantially as described.
Dated this 16th day of November 1891.
J. FEIRABEND,
By A. M. & Wm. Clark,
53. Chancery Lane, London, Chartered Patent Agents.