An Improved Process for Marbling, Mottling, or Colouring Paper or Cardboard on one side in the Paper Machine.
Year: 1897

page_text: Date of Application, 29th Oct., 1897-Accepted, 29th Jan., 1898.
COMPLETE SPECIFICATION.
An Improved Process for Marbling, Mottling, or Colouring Paper
or Cardboard on one side in the Paper Machine.
I, ERNST LEHMANN, of Fockendorf, Saxe-Altenburg, in the Empire of Germany,
Works Manager, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
n and by the following statement :—
As is well known, when albuminates or resin- or fat-soaps are mixed with suitable
chemicals such as alum, sulphate of alumina, acids and the like, flocculent deposits
are produced.
I have found that when these above mentioned albuminates or soaps are coloured
before being mixed with the depositing re-agents, the deposits attract the colouring
matter (in status nascendi) with the compounds formed and the colours are thereby
deposited with great intensity.
With the help of the colouring precipitations, paper can be marbled, mottled or
coloured, according as the sprayings are transferred regularly or irregularly over the
whole surface or part thereof to the one side of the paper, by means of a suitable
apparatus consisting of felt rollers, spray device and colour box, arranged at a suitable
place upon the machine, a sufficient drying being provided for.
The composition of the colouring material used can vary. For example, one litre
of milk coloured with gr. aniline blue and afterwards precipitated with 150 gr. of
sulphate of alumina.
The practical carrying out of the marbling or colouring of the paper can for
example be effected as follows:-
1. Between the second and third drying cylinders of the paper machine there may
be inserted a colour box with a rotating colour roller which latter rests upon the
surface of the paper. An apparatus of this description is represented in Figure 1 of
the accompanying drawings. The colour roller A transfers colour from the colour
box B to the surface of the paper C.
2. At the same place on the paper machine a colour box may be arranged filled
with sponges so that the surface of the paper is continuously passed along in contact
with these sponges which are fed with colour.
Figure 2 of the accompanying drawings represents the apparatus necessary for this
form of the invention. The sponges D in the colour box B which are continuously
impregnated, transfer the colour to the surface of the paper C passing thereover.
3. The colour may be converted into spray by means of a common sprinkling tube
and allowed to fall direct upon the surface of the paper.
4. A damp felt may move over the rollers set forth under Clause 1 and thus take
up the colour and transfer it to the surface of the paper under the press of the paper
machine.
5. A colour box which is open on the one side may be pressed against the upper
press roller, this roller will thus receive the colour from the colour box and transfer it
0 to the paper passing beneath it.
Figure 3 of the accompanying drawing represents an arrangement used for the
The colour passes from the feed-tube E into the colour box B, is carried or

page_text: by the press-roller F and transferred to the paper C. The pressing of the paper
against the roller F is effected by a second roller G with the help of the dainp
feit H.
6. One of the guide-rollers of the paper machine may dip in the colour and transfer
it to the surface of the paper.
7. Directly beneath the sieve of the paper machine a colour box may be arranged
which transfers the liquid colour under pressure to the under side of the surface of
the paper.
8. An egoutteur (drop apparatus) may receive the colouring matter by means of a
common spray-tube and transfer it to the surface of the paper.
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
A process for marbling, mottling or colouring paper or cardboard on one side,
which consists in conveying on to the paper web at a suitable place in the machine,
coloured albuminates, or resin- or fat-soaps and chemicals capable of depositing the
substantially as herein before set forth.
same,
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.