Improvements in and relating to Colour Block Printing Machines.
Year: 1894

page_text: Date of Application, 21st: May, 1894
Complete Specification Left, 21st: Mar., 1895-Accepted, 27th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to Colour Block Printing Machines.
I, HORACE LACEY DAVIES of 59 Clovelly Mansions, Gray's Inn, in the County,
of London, Printer, do hereby declare the nature of this invention to be.as
follows:-
This invention refers to colour block, printing machines of the kind described-in
the Patent Specifications No. 13,874 of 1887, No.. 18,664 of 1892 and No. 22,043
of 1892.
According to this invention I apply heat to the surface of the colour block so as
to render it sufficiently fluid.to give off colour to the paper instead of as heretofore
applying a solvent to the block surface. The block made of a suitable composition
is for this purpose at the time of or just before each impression exposed to heat
capable of proper regulation. Thus the printing cylinder may itself form the
means of heating the block surface being for this purpose provided with gas jets or
heated by steam or otherwise. Or I may provide a hot plate under which the
colour block passes in the forward and return stroke of the bed before the block
comes under the printing cylinder, the heat being so adjusted that the surface of
the block is evenly liquefied. In order to expedite the work I in some cases
construct the block of such a height that it will bear cutting off into four or more
blocks which are used simultaneously in the machine. The cutting is done by
means of an endless cutting band or bands having a suitable traversing feed motion
simultaneously with the endless band.motion.
Dthin 91st day of Mar 1894
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
COMPLETE SPECIFICATION.
Improvements in and relating to Colour Block Printing Machines,
I, HORACE LACEY DAVIES of 59 Clovelly Mansions, Gray's Inn, in the County
of London, Printer, 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 colour block printing machines of the kind described
in the Patent Specifications No. 13874 of 1887, No. 18664 of 1892 and No. 22043
of 1892.
According to this invention I apply beat to the surface of the colour block so as
to render it sufficiently fluid to give off colour to the paper instead of as heretofore
applying a solvent to the block surface. The block made of a suitable composition
is for this purpose at the time of or just before each impression exposed to heat
capable of proper regulation. Thus the printing cylinder may itself form the
means of heating the block surface being for this purpose provided with. gas jets
or heated by steam or otherwise. Or I may provide a hot plate under which the
colour block passes in the forward and return stroke before the block comes under
DQ21
:

page_text: the printing cylinder the heat being so adjusted that the surface of the block is
evenly liquefied. In order to expedite the work I in some cases construct the
block of such a height that it will bear cutting into four or more blocks which are
used simultaneously in the machine. The cutting may be done by means of a
stationary cutting block or by means of an endless cutting band or bands having a
suitable traversing feed motion simultaneously with the endless band motion. This
feed motion may be derived from the racks from which the printing cylinder is
worked.
In the accompanying drawings Fig. 1 is a part sectional end view and Fig. 2 a part
side view of a machine thus constructed the wheel gearing being omitted in this view.
The hollow printing cylinder A is rotated in the usual manner from the racks B on the
machine frame by means of the tooth wheels C. Its gudgeons D are hollow for
admitting into the interior of the cylinder a gas pipe E which has a tap Ex and
terminates in branches E' fitted with Bunsen burners E2 shewn in dotted lines in
Fig. 2.serving to heat the cylinder and the heat penetrating through the printing
paper lapped round the cylinder will thus also impart heat to the colour block F
at and near the place of contact between the block and the paper. But in order
to properly control or regulate that heat as required and to prevent the surface of
the block from becoming gradually too hot and liquid I provide a pipe G which
communicates with a blower and branches off to each side of the cylinder where it
terminates in the pipes G¹ which are perforated so that cool air jets may be
projected upon the colour block each time it passes the pipes G'. In case of thick
printing paper which forms a greater resistance to the penetration of heat from the
inside to the outside I may apply an additional means for heating viz.: an outer hollow
roller H which is suspended in slightly feathering bearing arms I and held in
contact with the outside of the paper on the cylinder A. It is rotated by a pinion
on its spindle gearing into that wheel C which rotates both in the forward and the
backward travel of the travelling bed. A branch pipe E with tap E and a pipe
carried through the interior of the roller H where it is perforated or is provided
with burners serves to heat this roller which again by contact with the paper on
the cylinder heats the outside of the paper.
Kis a knife blade mounted on a spindle which can turn in bearings L and are
capable of being set so as to cause the knife to level the surface of the colour block
relatively to the printing cylinder. The lever M serves to turn the knife out of
position when not in use and stops and catches are provided for retaining same in
the required position.
Fig. 3 is a plan, Fig. 4 an end view and Fig. 5 a side view of a form of block
cutting device. is a bearing bracket in which is supported a gudgeon upon
which is mounted a spur wheel_c. This wheel gears with the rack B on the
machine framing (see Figs. 1 and 2) serving to drive. the printing cylinder A.
d is a bevel wheel which gears with a bevel wheel e on a gudgeon that also
carries a spur wheel g in one with the wheel e.. and terminates in a handle /¹
serving to lift the frame by with its gear wheels. The gudgeons b and fare in a
frame h which by a pivot h¹ is jointed to the bracket a so that it can be raised by
the handle and the spur wheel c be disengaged from the rack B. when the
apparatus is to be put out of gear. The pivoted frame also carries an upper and
a lower pinion which gear with the spur wheel g and also carry guide pulleys k
around which passes the endless band saw or wire 1. A similar set of wheel
gearing and guide pulleys is provided at the other side of the machine bed. The
band. saw is thus driven across the said bed and serves to cut off layers of any
required thickness of the colour block placed on bed of the machine. The thickness
being determined upon, the bed is raised or lowered accordingly. A piece of flat
steel wire or band m may be fixed across the bed being attached to the two
frames which carry the lower pinions i. To this wire is attached a piece of cloth,
oiled silk or other thin sheet material which enters the cut made by the band saw
and serves to keep the two cut surfaces apart without a chance of uniting again
consequent on the heat caused by friction of the band saw. The bearing of the

page_text: gudgeon 6 is arranged in a square recess in the bracket a and can be easily lifted
out when the cap n has been removed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
―
1. In a colour block printing machine the application and use of means for
imparting heat to the surface of the colour block and for regulating such heat, for
the purpose of enabling said surface to give off a film of colour to the paper on the
printing cylinder substantially as set forth.
2. In a colour block printing machine the application and use of gas jets to the
interior of the printing cylinder with or without an outer roller which can be gas
heated when required for imparting additional heat to the outside of the paper on
the printing cylinder together with air jet devices for regulating or controlling
the heat imparted to the colour block by the same from the heated printing
cylinder and the paper thereon substantially as described and shewn.
3. In a colour block printing machine the application and use of devices for
slicing off layers of the colour block substantially as set forth.
4. In a colour block printing machine the application and use of an endless band
saw or wire for slicing off layers of the block with means for adjusting its position
as required substantially as described and shewn.
Dated this 21st day of March 1905.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.