IMPROVEMENTS IN THE MANUFACTURE OF WATERPROOF PAPER
Year: 1849

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
BRINDLEY, of Twickenham, Papier Maché Manufacturer, 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 Twenty-eight day of
February (One thousand eight hundred and forty-nine), in the twelfth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said William Brindley, my exors, adñiors, and assigns, Her especial
licence, full power, sole privilege and authority, that I, the said William
Brindley, my exors, adññors, and assigns, and such others as I, the said
William Brindley, my exors, adñiors, or 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 WATERPROOF PAPER;" in
which said Letters Patent is contained a proviso that I, the said William
Brindley, shall cause a particular description of the nature of my said In-
vention, 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 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, I, the said
William Brindley, do hereby declare that the nature of the 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:-
My Invention consists of causing the long webs of machine-made paper,
and also sheets of paper, to be rendered waterproof by means of oil and high
degrees of heat:
And in order that my Invention may be most fully understood, I would
state, that it is well known that paper, when numerous sheets have been
pasted or caused to adhere together for making japanners ware, and also what
are called panel boards, have been dipped in oil, and subjected to high degrees
of heat. Now, my Invention consists of causing long webs of machine-made
paper, and also sheets of paper, subjected to a like process in order to make
them waterproof. And it is also well known that sheets of paper have been
saturated with oil, and allowed to dry at low temperatures, by which the
surfaces at all times remain tacky. The oil, not being sufficiently acted on to
destroy this character when low temperatures are resorted to, produce the dry
and at the same time waterproof character, which constitutes the novel feature
of my Invention. In treating paper according to my improvements I cause the
same to be saturated with linseed oil. If machine-made paper is to be
operated on, I cause the same to pass into-a trough containing oil by means of
a roller, and by a pair of pressing rollers I express out any excess of oil which
may be on the paper as it rises out of the trough, in like manner to what is
now practised in sizing machine-made paper, or I apply the oil in any other
enient manner to the webs of paper, and I then cause the paper to be
placed in a suitable stove, heated to two hundred degrees to three hundred
degrees of Fahrenheit, the paper being kept opened out, so that both surfaces
may be acted on by the heat, and in about three hours the desired effect will
be obtained. A somewhat less temperature and longer time will produce a
like result, but I prefer the temperature above mentioned. If sheets of paper
are to be treated according to my Invention, I prefer to apply the oil by using
boards, such as making panel boards saturated with oil, and there place several
sheets of paper between each two boards, and subject a large number thus
surrounded to a press, or the sheets may have the oil applied in any other con-
venient manner. The separated sheets are then to be hung separate in a
suitable stove, heated to the extent before mentioned, and dried. The paper
thus prepared will be found applicable to many purposes where waterproof
paper is desired, and where any oily character remaining would be objection-
able. The paper, when having the oil applied, should be dry-as when making
japanners ware and panel wood. The paper thus treated may be written or
printed on, and paper hangings thus made will be found of great importance

page_text: when the walls are damp; and I would state that, paper hangings may be
either printed before or after rendering the same waterproof, excepting where
the high temperatures will interfere with the colors.
Having thus described the nature of my Invention, and the manner of per-
forming the same, I would have it understood that what I claim is, the mode
herein described of producing machine-made paper, when in the web and also
sheets of paper, waterproof.
In witness whereof, I, the said William Brindley, have hereunto set my
hand and seal, this Twenty-seventh day of August, in the year of our
Lord One thousand eight hundred and forty-nine.
WILLIAM (L.s.) BRINDLEY.
AND BE IT REMEMBERED, that on the Twenty-seventh day of August,
in the year of our Lord 1849, the aforesaid William Brindley came before our
said Lady the Queen in Her Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according to
the tenor of the Statute made for that purpose.
Enrolled the Twenty-seventh day of August, in the year of our Lord
One thousand eight hundred and forty-nine.