Improvements in Colour Printing Machines.
Year: 1887

page_text: Date of Application, 28th Apr., 1887
"Complete Left, 26th Jan., 1888
Complete Accepted, 2nd Mar., 1888
Improvements in Colour Printing Machines.
We JAMES POLLARD of Newton Bank Print Works Hyde in the County of
Chester and COLIN MATHER of the firm of Mather and Platt of Salford Iron Works
Manchester in the County of Lancaster Engineers do hereby declare the nature of
said Invention for IMPROVEMENTS IN COLOUR PRINTING MACHINES, to be as follows
―
Our invention relates to improvements in machines for printing colours on textile
and other materials and fabrics and the chief object of our Improvements is to enable
a supplementary in addition to the ordinary vibratory motion to be imparted to the
thin steel or other blade commonly termed the "doctor" employed to remove the
surplus colour from each printing roller.
At present the best known mode of operating the doctor by means of a rod
having a fulcrum near its middle one end of this rod is connected to the doctor
shears the other end carries a bowl which works in a grooved cam fixed upon the
bowl shaft or in a groove formed in the boss of a gear or friction wheel driven say
from the back shaft and revolving on a stud with its axis parallel to the bowl shaft.
As the cam or gear is rotated the cam groove moves each doctor giving it a
reciprocating motion parallel to the axis of its roller.
in
Now our Improvements consist essentially First in mounting the revolving part
which the eccentric or cam groove is formed loosely on the bowl shaft or other axis
in such manner that the said part can be moved lengthwise of the shaft or other axis
Secondly in imparting to the said part a reciprocating motion i.e. a movement
parallel with its axis in addition to a rotatory inotion so that the doctor receives a
compound reciprocating or vibratory movement.

page_text: We JAMES POLLARD of Newton Bank Print Works Hyde in the County of
Chester and COLIN MATHER of the firm of Mather and Platt of Salford Iron Works
Manchester in the County of Lancaster Engineers, 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 :-
Our invention relates to improvements in machines for printing colours on textile
and other materials and fabrics and the chief object of our Improvements is to enable
a supplementary in addition to the ordinary vibratory motion to be imparted to the
thin steel or other blade commonly termed the "doctor" employed to remove the
surplus colour from each printing roller.
At present the best known mode of operating the "doctor" is by means of a rod
having a fulcrum near its middle one end of this rod is connected to the doctor
snears the other end carries a bowl which works in a grooved cam fixed upon the
bowl shaft or in a groove formed in the boss of a gear or friction wheel driven say
from the back shaft and revolving on a stud with its axis parallel to the bowl shaft.
As the cam or gear is rotated the cam groove moves each doctor giving it a
reciprocating motion parallel to the axis of its roller.
Now our Improvements consist essentially First, in mounting the revolving part in
which the eccentric or cam groove is formed loosely on the bowl shaft or other axis
in such manner that the said part can be moved lengthwise of the shaft or other axis
Secondly in imparting to the said part a reciprocating motion i.e. a movement
parallel with its axis in addition to a rotatory motion so that the doctor receives a
compound reciprocating or vibratory movement.
And in order that our Invention may be fully understood and readily carried into
effect we will describe the accompanying Sheet of Drawings reference being had to
the figures and letters marked thereon.
Figure 1 is an end view and Fig. 2 a side view of so much of a colour printing
machine as is necessary for the proper illustration of our Invention.
In these views. a designates part of the framing, 6 the bowl shaft, 6' part of the
main bowl on which the fabrics are printed, e the revolving backshaft, d an eccentric
fixed thereon, and connected by a strap and rod e to an arm fixed on the rocking
shaft on which are also fixed two tappet levers gg which ongage a groove in the
boss of a grooved cam A. The cam A is mounted and free to slide on a feather key i
on the bowl shaft b and in the cam groove h¹ of the sliding cam h lies a bowl
the end of a rod ; which is connected by another rod not shown to one of the
"doctors."
on
From the foregoing description of parts it will be readily understood that when
the bowl shaft bis driven the sliding cam à revolving with it will by means of the
cam groove h¹ bowl and connecting rods impart a reciprocating motion to the

page_text: "doctor" which receives in addition a supplementary vibratory motion by means of
the eccentric d revolving with the backshaft c and, through the strap and rode and
arm rocking the shaft and so sliding the cam h to and fro on the feather key i.
We would have it clearly understood that we do not confine ourselves to the means
herein shown and described as the same may be varied or modified without departing
from the nature of our Invention which consists essentially in imparting a compound
vibratory or reciprocating motion to the "doctor" employed to remove the surplus
colour from each printing rollor instead of a simple vibratory movement as now
customary.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what we
claim is
Imparting a compound vibratory or reciprocating motion to the "doctor" of each
colour printing roller by the means herein shown and described or any suitable
equivalent therefor.
H. B. BARLOW,
17, St. Ann's Square, Manchester,
Agent for Applicants.