IMPROVEMENTS ON PADS FOR DAMPENING THE LEAVES OF COPYING AND OTHER BOOKS, AND FOR OTHER PURPOSES
Year: 1876

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and Com-
pany, Patent Agents, of 67, Strand, in the City of Westminster, Civil
Engineer, for the Invention of "IMPROVEMENTS ON PADS FOR DAMPENING
THE LEAVES OF COPYING AND OTHER BOOKS, AND FOR OTHER PURPOSES." A
communication from abroad by Charles Graham Chappell Simpson, of the
City and District of Montreal, in the Province of Quebec, Canada, Consulting
Engineer.
Sealed the 11th August 1876, and dated the 26th June 1876.
COMPLETE SPECIFICATION filed by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 26th June 1876.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Patent Agents,
of 67, Strand, in the City of Westminster, Civil Engineer.
"IMPROVEMENTS ON
PADS FOR DAMPENING THE LEAVES OF COPYING AND OTHER BOOKS, AND FOR OTHER
PURPOSES." A communication from abroad by Charles Graham Chappell Simpson,
of the City and District of Montreal, in the Province of Quebec, Canada, Consulting
Engineer.
This Invention has reference to an improved article of manufacture to be used
for dampening the leaves of copy books, such as those in which correspondence is
usually copied. The ordinary way is to write the correspondence in what is com-
monly known as copying ink, and then dampen a leaf or leaves in the copy book,
apply the letter or letters to the so dampened leaf or leaves of the copy book,
whereby a part of the ink is transferred, and a copy left in the book, the wetting
leaving hitherto been accomplished by laying under the leaf to be wet a sheet of
waxed paper, then wetting the leaf by means of a brush dipped in water, next
laying over the leaf so wet a sheet of blotting paper, after which a sheet of waxed
paper; the book is then closed and pressed in a suitable press to cause the blotting
paper to absorb the superfluous water.
My Invention consists in forming a pad of a porous substance (to receive the
water to be used for dampening the leaf of the copy book), such as blotting
paper or felt, &c., &c., and provided with a back of waterproof material, which
inay if desired be made to extend beyond and be doubled over, forming one or
more margins on the front of the pad; this margin in using the pad prevents
the leaf from being wet up to the binding, and thereby injure the book. In
[Price 4d.]

page_text: using this pad it is first charged with water, then placed in the copy book with
its wet surface next the leaf or leaves to be wet, a sheet of waxed paper, &c.,
being placed on the other side of it or them; the book is then pressed, whereby
the leaf or leaves are dampened.
In the Drawings hereunto annexed similar letters of reference indicate like parts,
and Fig. 1 is a plan of my Invention; Fig. 2 is (with regard to thickness) a
magnified section on line A, B, Fig. 1.
Letter a is a sheet of any desired size of porous material, such as thick blotting
paper, felt, &c., &c.; b is a sheet of waxed paper, waterproof cloth, or similar
material. This is cut large enough to extend round, as shown in Fig. 2, aud come
over the front, giving the margins c on each side, or it may be formed to give no
margin whatever, or only one or more as desired. The waxed paper or cloth b,
and porous substance a, may be caused to adhere together by giving the waxed
paper or cloth, or the edges thereof a coating of waterproof cement, then laying
over the margin on the front and pressing the whole, or the two may be secured
together by stitching, as indicated by the dotted lines g in Fig. 1, and the heavy
black line g in Fig. 2; either or both of these means may be adopted.
The advantage of having the front margin being that if the pad is used with
the margin placed next to the binding the leaf is prevented from being wet close
into it, and all chance of damage to the binding will be obviated.
As another means of carrying my Invention into effect the pad a may be
painted on the back with a coating of any material that will convert its back
surface into an impervious body, such as paint made of boiled linseed oil, wax,
waterproof cement, varnish, printing ink, &c., &c., care being taken not to apply
too much, so that it will sink deep into the body of the pad, and destroy its water-
holding properties, but such coating is best laid on in very thin coats of thick
material, and if one coat is not enough a second one may be given, and so on.
margin (one or more as desired) may be painted on the front.
The
The best means of applying the coats above mentioned known to me at present
is to print them on after the manner of applying printing ink to paper, as in
printing, too well understood to require description.
What I claim is as follows:-
First. As a new article of manufacture the pad a of porous material for holding
water by attraction, having an impervious back b, substantially as described.
Second. As a new article of manufacture the pad a of porous material for
holding water by capillary attraction, having an impervious back b with a front
impervious margin c or margins c, substantially as described.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this Twenty-sixth day of June in the year of our Lord One
thousand eight hundred and seventy-six.
H J HADDAN
(1.9)