An Improved Self Inking Index-printing Machine.
Year: 1892

page_text: Date of Application, 28th Apr., 1892
Complete Specification Left, 22nd June, 1892-Accepted, 23rd July, 1892
PROVISIONAL SPECIFICATION.
An Improved Self Inking Index-printing Machine.
CHARLES BURNHAM of No. 44 Sun Street, Finsbury Square in the City or
Loudon Machine Ruler, do hereby declare the nature of this invention to be as
follows:-
:-
This machine consists of three separate cog-wheels, of brass or other material,
working into each other and firmly connected to an elbow handle. The larger one
being furnished with an alphabet of india rubber and canvas in one solid strip; the
other two, being charged with ink of the colours required will upon the larger wheel
being revolved either left or right, supply the alphabet with ink of one or more
colours as required. The ink is fed from the centre thereby ensuring an even and
continuous supply of ink to each impression and enabling the operator to print at
least 1000 (one thousand) impressions with one inking. No springs of any kind
are used with this system, and by this principle a machine can be made for the
smallest index, which has never yet been accomplished by any other, to my
knowledge.
Dated this Twente eighth day of Al 1900
COMPLETE SPECIFICATION.
An Improved Self Inking Index-printing Machine.
I CHARLES BURNHAM of 44 Sun Street, Finsbury Square, London, Account
Book Ruler, 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 :-
The improvements effected by this invention are (a) Simplicity of construction :-
no springs of any kind, nor equivalents for springs, are used, and there is nothing
to get out of order. (6) Smallness of size :-The machine can be made to perform
the smallest work that can possibly be required, which, so far as I know and
believe, is not practicable with any such machine hitherto in use. (c) The inking
is strictly automatic; that is to say, the ink is not applied to the surface of each
inking pad individually, either by hand or otherwise, as has hitherto been done, but
is simply poured into receptacles, one receptacle for each colour used, in quantity
sufficient for a great number of impressions (say 1000 or more) without further
attention or adjustment. (d) The quality of the inking as to evenness and colour
is far better than that done by pads inked in the ordinary way, and, by the con-
struction, the ink is kept quite clean & remains fit for use for a considerable length
of time after being supplied to the machine.
In the sheet of diagrams hereto annexed
Fig. 1 is a vertical projection of the machine seen sidewise & Fig. 2 of it seen
end-wise.
Fig. 3 shows the construction of the inking-pad cell the cover being removed.
The same letters of reference always signify the same parts.
A is a cog-wheel, made of any suitable material, having an extended rim or
flange, C, on which is fastened a continuous strip of india-rubber, D, with the
letters of the alphabet cast thereon in relief at E E &c. BB' are pinions working
into A, carrying inking pads, F, so arranged that the pads on each pinion come in
contact with, and ink, alternate letters on the wheel, and hence the pads on one
pinion being charged with one coloured ink (say red) & those on the other with
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another (say black) it is obvious that the whole alphabet will be inked alternately
of the two colours (red and black). The wheel A works on a spindle, G, fastened
into a forked holder, H, one leg of which bears the brackets, J. J, in which the
spindles K.K, of the pinions are fixed. The upper part of this holder is bent &
fitted with a handle, L, as shown in Fig. 1. The cover, N, of each inking-pad
cell, O. O, is removable by unscrewing the milled screw, M, M, and the ink is then
poured upon the felt composing the pads; F in Fig. 3. the cover is replaced &
screwed up and the machine is ready for use and may be moved in the direction of
either of the arrows, whichever is more convenient. Between the first & last
letters of the alphabet I cut away a part of the rim or flange on which the letters
are placed & the space, S, thus opened, together with a guide mark on the inside of
'the rim, enables the operator to place the instrument on the spot desired with the
⚫utmost exactness.
The letters for printing from may be cut or otherwise produced on the metal rim
or flange of the wheel itself or may be made in other substances than india-rubber.
But the rubber being applied in one strip is a distinct advantage inasmuch as the
letters cannot come off as they do when they are affixed singly. Numbers or other
devices may be substituted for letters of the alphabet.
The number of inking pads on each pinion may be varied and also three or more
pinions may be used when necessary for printing in three or more colours.
For printing continuous devices by more than one revolution of the wheel the
cutting away of the rim above referred to, of course, does not occur.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what 1
-claim is :
1. The combination or mechanical contrivance of parts without springs or any
equivalent.for springs forming a-machine for printing in various colours.
2. The arrangement by which I am able to apply the india-rubber bearing the
letters in one continuous strip.
3. The contrivance by which the inking pad is supplied with a sufficient store of
ink in its cell on the pinion for a very large number of impressions (say 1000,)
instead of being inked on its inking surface by hand or otherwise.
4. I also claim the combination of the aforesaid three parts of my invention for
.the purpose herein before described.
Dated this 22nd day of June 1892.