IMPROVEMENTS IN THE MANUFACTURE OF PAPER
Year: 1847

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
BROADBENT, of Manchester, Paper Manufacturer and Dealer, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of Great
Britain. and Ireland, bearing date at Westminster, the Fifth day of August,
One thousand eight hundred and forty-seven, in the eleventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said. William Broadbent, my exors, admors, and assigns, Her especial licence,
full power, sole privilege and authority, that I, the said William Broadbent,
my. exors, admors, and assigns, or such others as I, the said William Broad-
bent, my exors, admors, and assigns, should at any time agree with, and no
others, from time to time and at all times during the term of years therein
expressed, should and lawfully might make, use, exercise, and vend, within
England; Wales, and the Town of Berwick-upon-Tweed, my Invention of
"IMPROVEMENTS IN THE MANUFACTURE OF PAPER;" in which said Letters Patent
is contained a proviso that I, the said William Broadbent, shall cause a par-
ticular description of the nature of my said Invention, and in what manner
the same is to be performed, by an instrument in writing under my hand and
seal, to be inrolled in Her said Majesty's High Court of Chancery within six
calendar months next and immediately after the date of the said in part
recited Letters Patent, as in and by the same, reference being thereunto had,
will more fully and at large appear.
> NOW KNOW YE, that in compliance with the said proviso, 1, the said
William Broadbent, do hereby declare that the nature of my said Invention,

page_text: and the manner in which the same is to be performed, are fully described and
ascertained in and by the following statement thereof; that is to say :-
In the manufacture of paper it has long been the practice to place under
the wire cloth or web of a paper-making machine a box or chamber open at the
upper part, and by some description of mechanical exhausting apparatus con-
tinually to draw the air from such box or chamber, in order to induce a
pressure of the outer atmosphere to take place on the pulp or partially made
paper, on the upper surface of the moving endless wire cloth, as the same
passes over the partially exhausted box or chamber. And it has, for various
purposes, heretofore been the practise to employ a jet or jets of steam to obtain
a withdrawal of air from flues and other places, and the means of so employing
steam are well known. Now my Invention consists of combining such pro-
cesses so as to obtain great improvement in the manufacture of paper, both
by reason of the uniformity of exhaustion which may be obtained by using
steam, and by a saving of cost, as the same steam which is now used for the
drying cylinders of paper machinery may be employed (after heating the
drying cylinders) for the purpose of obtaining the requisite exhaustion, in place
of at once passing into the atmosphere from the drying cylinders. In carrying
out my Invention the exhausting box or chamber will remain the same as
heretofore; but, in place of having a pipe therefrom leading to the air pumps
or exhausting fans, such as heretofore used, I conduct a pipe from the ex-
haustion box or chamber into the open air, and near the end thereof I intro-
duce a steam pipe, as is well understood when for the purpose of obtaining
exhaustion in flues and other places, such steam pipe having a valve or cock
to allow of the rush of steam through the outer end thereof being regulated.
And in order not to require steam for that purpose only, I cause the steam
used for the drying cylinders to be conducted by pipes into a small steam
chest, which has a cock for drawing off any water that may condense therein.
To this steam chest I attach the steam pipe, the end of which produces the
requisite jet for exhausting the air from the exhaustion box or chamber of the
paper-making machine. It is not absolutely necessary that the steam chest
should be used, but I believe it better to do so.
Having thus described the nature of my Invention, and the manner in
which the same is to be performed, I would wish it to be understood that I do
not claim the employment of an exhaustion box. or chamber under the wire
web of paper-making machines when separately considered, the same being
well known; neither do I claim the employment of steam jets as the means
of producing exhaustion, that being separately weil known in other manu-
factures. But what I claim is, the mode of manufacturing paper herein

page_text: described, whereby steam jets are employed in combination with exhaustion
boxes or chambers used with paper-making machines.
In witness whereof, I, the said William Broadbent, have hereunto set
my hand and seal, this Twenty-first day of December, in the year of
our Lord One thousand eight hundred and forty-seven.