IMPROVE- MENTS IN MACHINERY FOR MAKING PAPER
Year: 1867

page_text: LETTERS PATENT to George Watkin Hayes, of Two Waters Mills, Hemel
Hempstead, in the County of Herts, for the Invention of "IMPROVE-
MENTS IN MACHINERY FOR MAKING PAPER."
Sealed the 14th January 1868, and dated the 16th July 1867.
PROVISIONAL SPECIFICATION left by the said George Watkin Hayes
at the Office of the Commissioners of Patents, with his Petition, on
the 16th July 1867.
I, GEORGE WATKIN HAYES, of Two Waters Mills, Hemel Hempstead, in the
County of Herts, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MACHINERY FOR MAKING PAPER," to be as follows:-
This Invention has for its object improvements in machinery for making
paper. In the manufacture of paper it is found that the uniformity of the
paper is interfered with by the accumulation of knots and impurities on the
surface of the knotter plate. When the surface of the plate has just been
cleared and freed from knots and impurities more of the pulp passes through
it than was passing before the plate was cleared, and a corresponding.
variation in the thickness of the paper occurs.
Now according to my Invention I divide up the surface of the knotter plate.
by suitable partitions so as to form a comparatively narrow zig-zag channel
over its surface, along which the pulp has to flow until it gets through the
plate, then at the end of the channel at which the pulp enters a comparatively
rapid stream will be maintained sufficient to ensure the knots and. impurities

page_text: being carried on towards the other end of the passage; here they are deposited
In this way a large and sufficient
on the knotter plate and are cleared away.
portion of the surface of the knotter plate is kept quite clear all the time that
the working continues.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Watkin Hayes in the Great Seal Patent Office on
the 16th January 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
WATKIN HAYES, of Two Waters Mills, Hemel Hempstead, in the County of
Herts, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of July, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said George Watkin Hayes, Her special licence that I, the said George
Watkin Hayes, my executors, administrators, and assigns, or such others as
I, the said George Watkin Hayes, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at
all times thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN MACHINERY FOR MAKING PAPER," upon the condition (amongst
others) that I, the said George Watkin Hayes, my executors or adminis-
trators, by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said George Watkin Hayes, do hereby
declare the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :-
This Invention has for its object improvements in machinery for making
paper, and is confined to that portion of the said machinery called the strainers
or knotters, which machinery varies in construction, and this Invention is

page_text: the sides of the frame a', a', each partition has an opening in it at one end, as
is shown; these openings are alternately on either side of the knotter plate.
The said partitions e, e, may be arranged transversely, as shewn in the
Drawings, or longitudinally or otherwise. As already explained the current
of pulp keeps the greater portion of the knotter plate free from knots and
other impurities and in efficient working order. The knots which accumulate
in the after part of the channel will usually only require to be removed after
several hours working.
In witness whereof, I, the said George Watkin Hayes, have hereunto
set my hand and seal, this Sixteenth day of January, in the year of our
Lord One thousand eight hundred and sixty-eight.
GEORGE WATKIN HAYES.
(LS.)