IMPROVE- MENTS IN COLOUR PRINTING, AND IN APPARATUS CONNECTED THEREWITH
Year: 1865

page_text: PROVISIONAL SPECIFICATION left by Isham Baggs at the Office of the
Commissioners of Patents, with his Petition, on the 14th March 1865.
I, ISHAM BAGGS, of 54, Chancery Lane, in the County of Middlesex, Civil
Engineer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN COLOUR PRINTING, AND IN APPARATUS CONNECTED THEREWITH," to be as
follows:-
The said Invention relates to certain improvements in printing in colours
upon paper, calico, and other fabrics and substances, and in apparatus employed
therein, and whereby the performance of such operations with exactitude and
economy of time is greatly facilitated.
In carrying this Invention into effect as many separate presses are employed
as there are colours to be printed, such presses being similar or analogous to
the ordinary hand presses, and arranged either horizontally or vertically, the
whole being actuated by a single horizontal shaft, or by any other machinery
adapted to the purpose, and to which any suitable motive power may be
applied. The paper to be printed is placed upon a series of iron or steel
plates, the same being fastened or secured at equal distances from each other
by means of central axes to an endless band of leather or other suitable
material, or to an endless chain, the several parts of which are attached and
secured to each other by the methods well known to those engaged in the
construction of mechanism. The distances between the plates are the same as
the distances between the presses, so that in any position of the band or chain
the plates in operation are under the several platens of the presses. Stout iron

page_text: blocks are placed under the several platens and plates for the purpose of
receiving the pressure during the process of printing, such blocks being fixed
when a band or chain is used. The apparatus is fed by hand, or a long roll of
paper may be used, a series of impressions with the several colours employed
being thus obtained. When different colours are required to be laid on each
other, then after the first set of colours is printed the colours are dried and
the sheets or roll passed through another apparatus arranged similarly to that
before described, where the second set of colours is laid on or printed, and so
more are required. In place of a band, or chain, and plates, the surfaces
on which the paper is laid may be arranged so as to form a regular polygon,
which may work either horizontally or vertically. In this arrangement tapes are
provided in the well-known manner, and the paper being laid on the surfaces
the platens are pressed against them. Instead of either of these arrangements
a flat revolving table may be used, or any analogous contrivance by which the
principle of this Invention can be carried out. Set screws are used for
adjusting the surface blocks in register, and to make the register accurate a
slight movement is allowed to the plates, where these latter are employed, in
order to cause register pins or cylinders which are provided for that purpose
to find their way into corresponding holes by means of the taper or conical
ends with which they are furnished. In lieu of pressure being imparted in
the before-mentioned operations by the means ordinarily employed, hydraulic
power may be applied either for making the whole stroke by a velocity
varying with the requirements of the case, and ending with powerful pressure,
or for the finish of the stroke only. The application of hydraulic power for
these purposes may be effected by means of two or more pistons, rams, or
plungers of decreasing diameters, so as to give increased pressure' towards the
finish of the stroke, or by means of a crank or eccentric.