Improved Damping Apparatus for Use in connection with Press- copying Letters and other Documents.
Year: 1894

page_text: Date of Application, 12th Dec., 1894
Complete Specification Left, 4th Sept., 1895-Accepted, 12th Oct., 1895
PROVISIONAL SPECIFICATION.
Improved Damping Apparatus for Use in connection with Press-
copying Letters and other Documents.
1, JAMES RICHARD GREENHALGH, of 25, Lisburne Road, South Hampstead, in
the County of Middlesex, Clerk, do hereby declare the nature of this invention to
be as follows:-
This invention relates to improved means for damping pads intended for use in
press-copying letters and other documents, the same being designed to maintain the
pads or cloths at a uniform degree of humidity so as to ensure regularity in the
result produced, and expedition in the conduct of the operation; the employment
of a brush, and the usual treatment for the removal of the surplus moisture from the
copying paper being dispensed with.
Apparatus adapted for carrying my invention into effect may be constructed as a
In one of the trays is placed
pair of trays hinged together to close book-wise.
either the copying paper, or the pads or cloths to be used in damping the same, or
both. In the other tray is mounted a flat chamber adapted for the reception of
sponge or similar absorbent material, and having in its face numerous perforations
for ensuring the sponge and the pads being in sufficient contact with one another,
to effect the complete and uniform saturation of the latter, when the two trays are
closed together. For facilitating the supply of water to the sponge or equivalent.
material, I form in the chamber one or more pockets, each of which may be
provided with an inlet orifice arranged in the outer face of the tray. The water
escapes from the pocket through perforations forined in the sides thereof, and thus
gains access to the surrounding sponge or equivalent material.
Dated the 12th day of December 1894.
G. G. M. HARDINGHAM,
91, Fleet Street, London, E.C., Chartered Patent Agent.
Improved Damping Apparatus for Use in connection with Press-
copying Letters and other Documents.
1, JAMES RICHARD GREENHALGH, of 25, Lisburne Road, South Hampstead, in
the County of Middlesex, Clerk, do hereby declare the nature of this invention
and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
This invention relates to improved means for damping pads intended for use in
press-copying letters and other documents; the same being designed to maintain the
pads or cloths at a uniform degree of humidity so as to ensure regularity in the
result produced and expedition in the conduct of the operation; the employment of
a brush and the usual treatment for the removal of the surplus moisture from the
conving paper being dispensed with.

page_text: Apparatus adapted for carrying my invention into effect is illustrated in the
accompanying drawings, whereof
Fig. 1 is a perspective view showing the apparatus open, the means for
damping contained in the lid being raised out of contact with the material to be
damped.
Fig. 2 is a transverse section of the apparatus when closed.
The apparatus comprises a pair of trays A, B, hinged together so as to close
book-wise. In one of the trays, A, is placed either the copying paper, or the pads
or cloths to be used in damping the same, or both. In the other tray, B, is
mounted a flat chamber C adapted for the reception of sponge c or similar absorbent
material, and having in its face numerous perforations c for affording sufficient
communication between the sponge and the copying paper or pads, as the case may be,
to ensure the complete and uniform saturation of the latter, when the two trays are
-closed together as seen in Fig. 2. For facilitating the supply of water to the
sponge or equivalent material c, I form in the chamber C one or more pockets e²
(one being shown in the illustration), each of which may be provided with an
orifice arranged in the outer face of the tray B. Water is supplied to the
pocket and escapes therefrom by way of the perforations 3, thus gaining access
to the absorbent material. The pocket c2 may also contain absorbent material.
The tray B is formed with only three turned-up edges; it being required to assume
approximately an angle of 90° whilst the material to be damped is placed in or
removed from the tray A. A dependent rib or projection & is, moreover, formed
on the inner face of the tray B for the purpose of supporting the same on the
turned-up edge of the tray A when the apparatus is in the open position. The
trays are preferably connected together by means of wire hinges, as shown
at a, a, Fig. 2; facility being hereby afforded for separating the trays when
necessary.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I claim :-
1. The improved apparatus for damping paper, pads or cloths, for use in press-
copying letters and other documents, constructed substantially as described with
reference to the accompanying drawings.
2. For use in connection with press-copying letters and other documents, damping
apparatus constructed or operating substantially as herein described, and comprising
a pair of trays, one of which contains the material to be damped, whilst the other
is formed or provided with a chamber charged with sponge or other absorbent
material; the inner face of the chamber being perforated and its outer face
furnished with a perforated pocket adapted for the reception of water supplied
through an external orifice.
Dated the 28th day of August 1895.