Year: 1886

page_text: I, WILLIAM STEWART of Pollokshaws in the County of Renfrew, Engineer, do
hereby declare the nature of this invention to be as follows:-
The object of my invention is to adapt ordinary calico printing machines for.
printing scarves or serongs or similar fabrics in which a transverse border or strip
is printed by bringing into operation a separate series of cylinders or rollers from
those which print the main ground work.
According to my invention each printing cylinder of the entire series is held
normally in contact with the fabric passing round the "bowl" of the machine, but
is raised or withdrawn from contact with the fabric by means of pitch chains
formed with raised parts or enlargements or with other suitable pattern pieces
which are interposed between fixed rollers on the side frames of the machine and
the mandrils carrying the printing cylinders.
In a typical modification a sprocket wheel is fitted on each end of each mandril,
and round the series of sprocket wheels on the mandrils of those cylinders which
print the main ground work a pitch chain is carried at each end of the machine,
while on the sprocket wheels of the rollers for the cross border printing a pitch
chain is fitted in a similar manner on each side. The chains at one part of their
length are of such thickness or depth that they simply run freely between the
sprocket wheels and rollers on fixed studs or brackets fitted between them and the
axis of the bowl; but at other portions of their length the links of the chains are
made of greater thickness or depth than the space. between the sprocket wheels
and such rollers, and the chains in running over the sprocket wheels press out
radially the mandrils of the rollers over which they pass, such rollers are thereby
raised out of contact and for the time being cease to print. The raised or enlarged
portions of the chains are so disposed that the cylinders for the ground work are
raised only for such a time that a blank space is left sufficient for the cross borders
of two adjacent scarf lengths, while those cylinders of the series for printing the
cross borders are raised to be out of contact during the passage under them of the
parts of the fabric containing the main groundwork and are dropped into contact
only for such a time as to form the cross borders provision being however made
when necessary for a blank space between each scarf for cutting.
The chains are carried up beyond the upper cylinder of the series to sprocket
wheels on an adjustable shaft provided for each pair of chains so that a greater

page_text: length of chain may be employed than is required to pass round the series of
sprocket wheels on the mandrils and so that a number of links may be added to
or removed from the chains to alter the patterns of the chains and to suit variations
of the lengths of the scarves.
In some cases, a separate pattern chain of the kind described is fitted round a
sprocket wheel at each end of each mandril. This arrangement is particularly
applicable in cases where the individual cylinders may not be symmetrically
disposed round the bowl and the pitch chains cannot be conveniently fitted in
gear with the series of sprocket wheels.
To provide for adjustment of the sprocket wheels relatively to the chains and of
the toothed gearing relatively to the mandrils on which the toothed pinions are
fitted, the pinions and sprockets are fitted loosely on bosses keyed on the mandrils
and to which bosses they are connected by screws or similar devices.
+
T
1000

page_text: Improvements in Calico-printing Machines.
I, WILLIAM STEWART of Pollokshaws in the County of Renfrew, 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:
"
The object of my invention is to adapt ordinary calico printing machines for
printing scarves or serongs or similar-fabrics in which a transverse border or
strip is printed by bringing into operation a separate series of cylinders or rollers
from those which print the main groundwork.
According to my invention which is illustrated under one modification as applied
to an ordinary calico-printing machine in front elevation at figure 1, in plan at
figure 2, in side elevation at figure 3, and in detail at figures 4 to 9 of the accom-
panying drawings, each printing cylinder A of the entire series is held normally in
contact with the fabric passing round the "bowel " B of the machine, but is raised
or withdrawn from contact with the fabric by means of pitch chains C, C³, formed
with raised parts or enlarged links c, c', or with other suitable pattern pieces which
are interposed between rollers D on the side frames E of the machine and the
mandrels F carrying the printing cylinders. A separate sprocket wheel G. is fitted
on each end of each mandrel F and round each of the series of sprocket wheels of
those cylinders which print the main groundwork and which are situated on the
right hand side of the machine as seen at figure 1, a pitch chain C. is carried at
each end of the machine; while on each of the sprocket wheels of the rollers or
cylinders for printing the cross border and which are on the left hand side of the
machine a pitch chain C is fitted in a similar manner on each side. As shown by
figures 1, 4 and 9, the chains C, C¹, at one part of their length are formed of links
of such thickness or depth that they run freely between the sprocket wheels Q and
the rollers D which are fitted on studs d secured on the frame E between the
wheels G and the axis of the bowl, the said studs being however adjustable as
indicated by figure 5, to compensate for wear. At other parts of their length as
at c, d the links of the chain C, C, are made of greater thickness or depth than
the normal space between the sprocket wheels and the rollers D, and the chains in
running over the sprocket wheels press out radially the mandrels F of the cylin-
ders A over which they pass, such cylinders being thereby raised out of contact
with the fabric so that for an interval they cease to print. The raised 'or enlarged
portions of the chains are so disposed that the cylinders for printing the ground
work are raised only for such a length of time that a blank space is left on the
fabric passing under the cylinders sufficient for the formation of the cross borders
of two adjoining scarf lengths, while those cylinders of the series for printing the
cross borders are raised to be out of contact during the passage under them of the
parts of the fabric containing the main ground work and are pressed into contact
only for such a length of time as to permit of the formation of the cross borders
on the blank spaces left on the fabric, provision being however made when
necessary for leaving a blank space for cutting between each scarf length.
The chains C, C are carried out and round guide wheels or pulleys H on shafts H¹
provided for each pair of chains said shafts being fitted in adjustable frames or

page_text: brackets so that a number of links may be without inconvenience added to or
removed from the chains to alter the pattern and to suit variations in the lengths
of the scarves to be printed. As seen particularly in figure 4 each printing
cylinder A is kept in contact with the bowl B by means of a volute spring I fitted
within a casing I and bearing against a shoulder in a screw sleeve i through
which passes an adjusting screw spindle bearing on the back of a sliding bush i³
in which is carried the mandrel F of the printing cylinder.
To provide for adjustment of the sprocket wheels G upon the mandrels each
sprocket as seen in figures 7 and 8 is fitted loosely upon a boss k keyed on the
mandrel F, and a screw ¹ passing through a key piece k secured in the boss and
bearing upon the web of the sprocket wheel is employed to adjust the position of
the sprocket, the extent of adjustment being in general not greater than the
pitch of the sprocket teeth. When the adjustment is effected the sprocket may be
secured in place by bolts ³ passing through it and the keyed boss. A similar
arrangement as shown by figures 6 and 7 is adopted to provide for adjustment
relatively to the mandrel F of the toothed pinion L by which the cylinder is
driven.
The cylinders for printing the ground work are driven from the spur wheel M
and those for printing the cross borders from the spur wheel N through the
pinions L fitted on the mandrels F.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
"
1. In a calico printing machine for printing scarves," serongs or similar fabrics
the employment in conjunction with each printing cylinder of a pattern chain and
operating mechanism for periodically moving the cylinder out of contact with the
fabric on the "bowl" substantially in the manner and for the purpose herein
Bet forth.
,,
or
similar fabrics
2. In a calico printing machine for printing scarves, "serongs
the combination with the mandrels of the printing cylinders of sprocket wheels
and pattern chains for periodically raising the cylinders and volute springs or like
means for pressing them into contact with the fabric passing round the bowl
substantially as herein set forth.
3. In calico printing machines for printing scarves, " serongs or similar fabrics
the devices herein described and illustrated for adjusting the sprocket wheels
carrying the pattern chains and the toothed gearing upon the mandrels of the
printing cylinders substantially as herein before described..
Dated thin thi thanth day of nataha- 1986.