IMPROVE- MENTS IN DAMPING PAPER FOR PRINTING OR OTHER PURPOSES, AND IN THE APPARATUS USED THEREIN
Year: 1879

page_text: LETTERS PATENT to Alexander Annandale, of Beltonford Paper Works, Dunbar,
in the County of Haddington, North Britain, for the Invention of "IMPROVE-
MENTS IN DAMPING PAPER FOR PRINTING OR OTHER PURPOSES, AND IN THE
APPARATUS USED THEREIN."
Sealed the 25th November 1879, and dated the 27th May 1879.
PROVISIONAL SPECIFICATION left by the said Alexander Annandale at
the Office of the Commissioners of Patents on the 27th May 1879.
ALEXANDER ANNANDALE, of Boltonford Paper Works, Dunbar, in the County of
Haddington, North Britain. "IMPROVEMENTS IN DAMPING PAPER FOR PRINTING
5 OR OTHER PURPOSES, AND IN THE APPARATUS USED THEREIN."
The said Invention consists in the damping of paper for printing or other pur-
poses by means of spray producers or vapourisers, in which water is transformed
into spray or vapour by the use of compressed air. The spray producers are
arranged in convenient proximity to the paper.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Alexander Annandale in the Great Seal Patent Office on the 26th
November 1879.
ALEXANDER ANNANDALE, of Beltonford Paper Works, Dunbar, in the County of
Haddington, North Britain. "IMPROVEMENTS IN DAMPING PAPER FOR PRINTING
OR OTHER PURPOSES, AND IN THE APPARATUS USED THEREIN.”
My said Invention consists in the damping of paper for printing or other pur-
poses by means of spray producers or vapourisers, in which water is transformed
into spray or vapour by the use of a current of air or of steam under pressure, the
said spray producers being arranged in proximity to the paper, so that when
the spray is created it effects the damping of the paper equally and regularly
throughout.
And in order that my Invention may be properly understood I will now pro-
ceed to describe the system, mode, or manner in or under which the same is or may
be performed or carried into practical effect, reference being had to the accompanying
Drawing and to the figures and letters marked thereon.
Figure 1 represents in vertical section a portion of a paper machine with the said
improvements combined therewith; Figure 2 is a plan of a portion of the same;

page_text: and Figure 3 is a transverse section of the water trough and other parts of the
spray producers drawn to a larger scale. On the top of the framing A of the portion
of the paper machine shewn in Figures 1 and 2 is mounted a carrying roller a, and
over this the web of paper B to be damped is led to a reel C, turning in bearings
in the framings D, and rotated from the paper machine or otherwise, as may be
convenient. The framing D supports the standards E, carrying the spray pro-
ducers, which consist as follows:-A trough F is in proximity to the web of
paper B, and situated at right angles to the length of the said web, to which trough
water is supplied by the pipe f; the pipe H is carried upon the edge of the trough F,
farthest froin the web B, and to this pipe is supplied air or steam under pressure in
any of the known and convenient ways. At intervals on this pipe, and projecting
over the water trough Fare nozzles h, contracted at their outlets, and to the side
of the trough F are attached a number of brackets i (one to each nozzle h), each
carrying a holder j supporting a water tube k, which water tubes are contracted at
their upper ends, their lower ends dipping into the water in the trough F. The
mouths or contracted upper ends of these tubes k are in their normal position in
close proximity to the outlets of the nozzles h, so that when the apparatus is in
action the force of steam or air under pressure passing along pipe h, and out at the
nozzles h, and over the mouths of the tubes k causes a vacuum to be formed in the
upper parts of the tubes k, so that water from the trough F rises into these tubes k,
and meeting with the steam or air issuing from the nozzles h, the said water is
dispersed in the form of spray (as indicated at L, Figure 1) over the travelling web
of paper.
The trough F and line of nozzles h and water pipes k extends along a distance
equal to the greatest width of paper to be damped, and when a narrow web is
being operated upon one or more of the water tubes k at one or both sides can be
turned to one side by swivelling their holders ; in the brackets i, so that their
mouths are away from the nozzles h, thereby preventing the formation of spray at
the places where it is not required.
The short tubes of the holders j and those which hold the stems of the said
holders are split, as shewn in the details, Figure 4, to spring upon and hold the
water tubes k and holders j.
It is to be understood that my Invention is applicable to the damping of paper
generally, in which such damping can be effected essentially, as hereinbefore
described.
Having now described and particularly ascertained the nature of my said Inven-
tion, and the system, mode, or inanner in or under which the same is or may be
used or practically carried into effect, I would observe in conclusion that what I
consider to be novel and original, and therefore claim as the Invention secured to
me by the hereinbefore in part recited Letters Patent is,―
First. The hereinbefore described improvements in damping paper, that is to
say, effecting such damping by means of a spray, essentially as herein before
described.
Second. The combination with paper making machines or other machines in
which paper is to be damped whilst travelling in the web of spray producers for
effecting such damping, essentially as herein before described and illustrated in the
accompanying Drawings.
In witness whereof, I, the said Alexander Annandale, have hereunto set my
hand and seal, this Twenty second day of November, in the year of our
Lord One thousand eight hundred and seventy nine.

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