Paper Board.
Year: 1893

page_text: Date of Application, 8th Apr., 1893-Accepted, 13th May, 1893
COMPLETE SPECIFICATION.
[Communicated from abroad by ROBERT B. MCEWAN, JESSIE L. MCEWAN, and
RICHARD W. MCEWAN, Paper Manufacturers, of Whippany, New Jersey,
United States of America.]
Paper Board.
I, GEORGE CROYDON MARKS, Engineer, of 13 Temple Street, in the City of
Birmingham, 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 invention relates to the manufacture of paper board, box-board and the like
from newspapers or other similar printed white paper. The object is to obtain a
quality of board which is superior to the different varieties now on the market, but
which can be produced at less cost than any of the said varieties of board of a
quality approaching that of mine.
In the manufacture of the improved article I preferably use, on account of its
cheapness, its freedom from size and its softness, printed newspaper or other
printed paper possessing the characteristic properties of the ordinary paper upon
which newspapers are printed, and I have found that old copies of newspapers or
the over issues can be bought up at low rates and utilized for my purpose.
It has been found that the improved product can be manufactured most
economically and with the best results by following the process which is described
below, but it will be understood that the product can be obtained in other ways.
In the process referred to, the stock is first cleansed from dust and foreign matter
and soaked in hot water until it is thoroughly soft. Without permitting it to cool
it is then transferred to the beating engine, and when the pulp is sufficiently beaten
it is allowed to pass to the stuff chest from which it is pumped to the making
cylinder vat, and at all times it is kept as hot as possible under the circumstances.
It is found that this process is expeditious because when the ink on the paper has
once been softened by the hot water it is thereafter kept soft instead of being set
again by the use of cold water at any point, and the permanent particles of the ink
which are not dissolved and washed away are therefore during the beating more
readily subdivided with exceeding minuteness and are thoroughly and uniformly
distributed throughout and blended with the fibres.
"
The novel product, whether made by the process above described, or by any
other which may be used in its stead, is a board which has the permanent particles
of printers' ink minutely subdivided and uniformly distributed throughout its body
to produce a smooth and even tint throughout, while the strength of the fibres has
not been impaired by more or less-expensive attempts to bleach out the ink. It
should be understood that by the term
66 newspaper as used herein, is included
paper upon which newspapers, circulars, and the like have been printed and I
propose generally to use old copies of newspapers and over issues for the
manufacture of the product. It will also be understood that in practice, if so
required for special purposes, there may be mixed with the newspapers a slight
proportion of other paper or of raw fibre.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manuer the same is to be performed, I declare that what I
claim is :-
As a new article of manufacture, a paper board formed from printed news-

page_text: printers' ink minutely subdivided and uniformly distributed throughout the body
of the board, whereby a smooth and even tint is imparted to the board.
Dated this 7th day of April 1893.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicant.