Method of and Apparatus for Applying Colouring or Staining Material to Paper and the like.
Year: 1895

page_text: Date of Application, 2nd July, 1895-Accepted, 3rd Aug., 1995
COMPLETE SPECIFICATION.
Method of and Apparatus for Applying Colouring or Staining
Material to Paper and the like.
1, NEWNHAM BROWNE, of 73, Cheapside, in the City of London, Chartered
Patent Agent, do hereby declare the nature of this invention and in what
manner the same is to be performed, which has been communicated to me by
August Koebig of the Radebeuler Maschinenfabrik, Radebeul, near Dresden, in the
Kingdom of Saxony, to be as follows:-
This invention relates to machines of the class by which earthy colours are
spread on paper and the like.
If the paper is to be covered with colour on both sides it had hitherto to be
It has not been
passed through the machine twice, once for colouring each side.
possible hitherto, because no method or suitable apparatus has been known, to effect
the spreading of the colour evenly and simultaneously on the two sides of the paper.
This spreading is usually effected by passing the dry uncoloured side of the paper
over a firm support (a table or a cylinder) facing which the spreading device,
usually brushes, works on the coloured surface. Such apparatus do not admit of
colouring, or staining the paper on both sides simultaneously as the colour, or stain,
would adhere to the bed, or support, and thus be lost.
To enable the colouring of the two sides to be done simultaneously, by a single
passage through the machine, thereby saving both time and the twofold manipulation
usually required, is the object of the present invention, reducing the said manipulation
to about one half.
The method consists in passing the paper by the spreaders, not as heretofore
horizontally, but vertically, the paper being stained on both sides and the spreaders
work simultaneously on both sides with equal speed and pressure but in opposite
directions.
An apparatus adapted for carrying this method into practice is shown in the
accompanying drawings.
Fig. 1, is a vertical section through the apparatus.
Fig. 2, elevation of the same.
P is the paper being staiued, or coloured, on both sides by the staining,
or colouring devices; it moves vertically upwards as shown by the arrows
and is maintained at a suitable degree of tension. b, bare a pair of brushes
the bristle sides of which face one another; they are exactly opposite to one
another, move horizontally, and act on the paper simultaneously and at the
sanie pressure. e, e, are excentrics so placed on the same shaft w that they impart
reciprocating motion, opposite in directions, but ideutical in speed, to the brushes b, b,
through the rods S. S.
By reason of the equal pressure which the brushes b exert upon the paper they
reciprocally act as supports for one another, rendering further support unnecessary.
By their equal speed, and opposite motion the paper is kept flat, and creasing of the
same is avoided."
Longitudinally the paper may be kept stretched whilst running through the
spreading mechanism, partly by the pressure rollers q. q below (dottel in the
drawings) which form part of the straining mechanism, partly by drawing off
rollers a. a indicated in the drawings and placed above, the latter may be used if
any of the well known drying devices are placed between the staining and spreading
devices.
In some cases more than one such spreading mechanisms may be used, each
perfecting the work of that preceding it.

page_text: Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed as communicated to me by my
foreign correspondent I declare that what I claim is :
For the purpose of evenly spreading colours or stains on paper and the like and
on both sides thereof simultaneously.
1. A method which consists in feeding the paper or the like P, vertically to the
spreading mechanism, which works on both sides simultaneously with equal speed
and pressure but in opposite directions.
2. An apparatus for carrying out the method referred to in Claim 1, characterized
by horizontal brushes, operated by excentrics e and rods S so as to bave
reciprocal motion in opposite directions at the two sides of the paper or the
like P.
1
1 1
TL 100
NEWNHAM BROWNE.