Improvements in Machines for Printing in Colours.
Year: 1894

page_text: Date of Application, 23rd Feb., 1894
Complete Specification Left, 22nd Dec., 1894-Accepted, 26th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Machines for Printing in Colours.
I, JOHN LACEY DAVIES of Chipstead, in the County of Surrey, Civil
Engineer, do hereby declare the nature of this invention to be as follows:-
In the Specifications of Letters Patent No. 18,664 dated 18th October 1892
and No. 22,043 dated 1st December 1892, I have described machinery whereby
colour printing is effected by means of colours arranged mosaic-like in a dry solid
block the surface of which for each impression is moistened with a solvent so that
a thin film of the colours may be transferred from the block directly on to the
paper to be printed therewith.
"
My present invention relates to such machines and the improvements consist first
in applying the solvent in a more direct and efficient manner to the colour block
by placing the solvent "feeding rollers on the inner side of the solvent roller,
that is to say, the side next to the printing cylinder and supplying the innermost
of these rollers, which is in contact with the solvent roller with solvent by means
of a flannel or cloth which by capillary action draws and supplies the solvent from
a trough placed above, or by means of a spray or other suitable device-secondly
in this application two or more wiping rollers above the solvent roller which
receive rotary motion by frictional contact with the solvent roller and simul-
taneously receive a reciprocating motion slowly from one side of the machine to
the other, which may be effected by forming a screw on one of their end gudgeons
which turns in a nut in the framing, first one way, and then the other by the
alternating rotation of the solvent roller.
Thirdly the improvements consist in automatically raising the solvent roller free
from the colour block in the return travel of the latter so that the solvent-
moistened colour surface on the block shall not be transferred to the solvent roller,
whereby the full strength or body of colour for printing on the paper is retained.
The raising may be effected by an inclined plane appliance operating under
the solvent roller bearings and actuated from any suitable "prime mover of the
machine.
The lateral side wiping appliances described in the aforesaid Specification may
be caused to reciprocate from side to side of the machine and a pressing pad may
be used or applied between the two parts of each wiping cloth which are in contact
with the solvent roller which improvements effect a more perfect cleaning of the
solvent roller.
1004

page_text: I, JOHN LACEY DAVIES of Chipstead in the County of Surrey Civil
Engineer 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:-
In the Specifications of Letters Patent No. 18664 dated 18th October 1892 and
No. 22043 dated 1st December 1892 I have described machinery whereby colour
printing is effected by means of colours arranged mosaic-like in a dry solid block
the surface of which for each impression is moistened with a solvent so that a thin
film of the colours may be transferred from the block directly on to the paper to be
printed therewith.
My present invention relates to such machines and I shall now describe it with
reference to the accompanying drawings in which Figure 1 is a side view of a
machine fitted with my improvements and Figure 2 a plan view of two upper
wiping rollers forming part of such improvements.
Firstly, these improvements consist in applying the solvent in a more direct and
efficient manner to the colour block by placing the solvent feeding rollers c c on
the inner side of the solvent roller d that is to say the side next to the printing
cylinder A and supplying the innermost roller c, with solvent by means of a flannel
or cloth c which by capillary action draws and supplies the solvent from a
trough a placed above or by means of spray or other suitable device.
Secondly, my invention consists in the application of two (or more) wiping
rollers o shown in plan Figure 2 above the solvent roller d, which receive rotary
motion by frictional contact with the solvent roller d and simultaneously receive a
reciprocating motion slowly from one side of the machine to the other which may
be effected by (as for example here shown) forming a screw on one of their end
gudgeons p which turns in a nut q in the framing, first one way and then the other
by the alternating rotation of the solvent roller d.
.
Thirdly, the improvements consist in automatically raising the solvent roller d
free from the colour block in the return travel of the latter, so that the solvent-
moistened colour surface on the block shall not be transferred to the solvent
roller, whereby the full strength or body of colour for printing on the paper is
retained. The raising may (as for example here shewn) be effected by an inclined
plane appliance operating under the solvent roller bearings and actuated from
any suitable part of the machine say from a cam s on a shaft s' which by wheel
gearing is rotated from the driving shaft B. The cam operates against one end of
a double armed levert which is connected at its upper slotted end with a pin on a
lever u; on the shaft of the latter is fixed a lever which is jointed to the inclined
plane or wedge-ended bar r.
0
The lateral wiping appliances described in the aforesaid Specification 220439
may be caused to reciprocate from side to side of the machine as therein described
or in other suitable manner and a pressing pad w may be used or applied between
the two parts ee of each wiping cloth which are in contact with the solvent
roller d. By means of this pad I effect a more perfect cleaning of the said
roller.
Having now particularly described and ascertained the nature of my said inven-
ion and in what manner the same is to be performed I declare that what I
claim is :-
1. The application and use with a solvent roller d of solvent feeding roller or
rollers ce on the "inner" side of the solvent roller substantially as and for the

page_text: 2. The application and use with a solvent roller d of wiping rollers o above and
in frictional contact with the said roller, the rollers o having imparted to them a
reciprocating movement, substantially as and for the purpose set forth.
3. The application and use with a solvent roller d of means for raising the same
clear of the colour block in the return stroke of the latter substantially as and for
the purpose set forth.
4. The application and use with reciprocating wiping appliances of the character
stated of a pressing pad between the two parts of each cloth substantially as and
for the purpose set forth.
5. The improvements described with reference to the accompanying drawings.
Dated this 22nd day of December 1894.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.