Improvements in machines for printing fabrics
Year: 1888

page_text: We, JOSHUA KNOWLES of Tottington Mills near Bury in the County of Lancaster
Calico Printer and JOSEPH WHITTAKER of the same place Mechanic, do hereby
declare the nature of this Invention to be as follows:
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Our invention relates to the Invention for which Letters Patent numbered 12,901
were granted to Samuel Knowles on the 23rd September 1887 for "Improvements in
machines for printing fabrics" particularly for printing sarees shawls or other fabrics
with a heading or with a pattern at certain intervals.
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Our present improvements consist principally in a novel construction of the cams
which operate the mechanism employed for controlling the action of the filling rollers.
As now constructed separate cams with recesses of different lengths have to be
employed according to the length of time it is desired to withdraw the filling roller
this involves changing the cams whenever a change is made in the operation of the
filling rollers.
Now according to our Invention instead of making the came solid and cutting
recesses in their peripheries we propose to make each cam of say two discs the
periphery of each disc being cut away so as to form two semicircles of unequal
diameters. When the two discs are bolted or otherwise secured together with the
corresponding semicircles agreeing in position the recess i.e. the smaller semicircles
will occupy about half the circumference of the cam and the length of the recess can
be adjusted by simply adjusting the relative positions of the two discs.

page_text: Improvements in Machines for Printing Fabrics.
We, JOSHUA KNOWLES of Tottington Mills near Bury in the County of Lancaster
Calico Printer and JOSEPH WHITTAKER of the same place Mechanic, 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 the Invention for which Letters Patent numbered 12,901
were granted to Samuel Knowles on the 23rd September 1887 for "Improvements in
machines for printing fabrics" particularly for printing sarees shawls or other fabrics
with a heading or with a pattern at certain intervals.
Our present improvements consist principally in a novel construction of the cams
which operate the mechanism employed for controlling the action of the filling or
heading rollers. As now constructed separate cams with recesses of different lengths
have to be employed according to the length of time it is desired to withdraw the
filling or heading roller; this involves changing the cams whenever a change is made
in the operation of the filling or heading rollers.
Now according to our Invention instead of making the cams solid and cutting
recesses in their peripheries we propose to make each cam of say two discs the
periphery of each disc being cut away so as to form two semicircles of unequal
diameters. When the two discs are bolted or otherwise secured together with the
corresponding semicircles agreeing in position the recess, i.e. the smaller semicircles,
will occupy about half the circumference of the cam and the length of the recess can
be adjusted by simply adjusting the relative positions of the two discs.
And in order that our Invention may be fully understood and readily carried into
effect we will describe the accompanying five Sheets of Drawings reference being had
to the figures and letters marked thereon.
Figure 1 is a front and Fig. 2 a back side elevation of a cam constructed according
to our improvements. Fig. 3 is a plan looking downward upon the edge of the cam.
Fig. 4 is a vertical section taken upon the plane of the line A B Figs. 1 and 2.
Figs. 5 and 6 are two views illustrating the use of tappets or risers in conjunction
with our improved cam.
In these views.-a designates the shaft upon which the cam is mounted and
adjustable as described in the Specification to the aforesaid Letters Patent, b is one
disc and c the other disc or preferably a ring as shown which is fitted adjustably upon
one face of the disc b to which it is secured by bolts d passing through slots b and c
respectively.
As shown in Figs. 1 to 4 the disc band ring c are represented as being secured
together in that position in which their respective larger and smaller diameters
coincide thereby giving the maximum length of recess or depression as indicated by
the letters xxx, Fig. 1. The length c this recess or depression may be readily
reduced by simply adjusting the relative positions of the disc b and ring c as indicated
by the letters and dotted lines on Fig. 2. It is obvious that two complete discs
may be employed instead of the ring and disc as shown and described.

page_text: Figs. 5 and 6 illustrate the use and application of risers or tappets e in conjunction
with our improved cam to which the risers are secured by bolts f
In this case the relative positions of the disc b and ring c are so adjusted that the
periphery of the cam is of only one diameter as shown in Fig. 5 upon which periphery
the small steel roller which operates the mechanism in connection with the filling or
heading rollers runs until it encounters and is lifted by one of the risers e.
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―
1. Constructing the cams which actuate the mechanism controlling the filling or
heading rollers of printing machines with recesses or depressions adjustable as to
length substantially in the manner and for the purposes herein described and
indicated.
2. The construction and combined arrangement of parts embodying our improve-
ments in machines for printing fabrics substantially as herein described and as
illustrated by the accompanying Drawings.
H. B. BARLOW,
17, St. Ann's Square, Manchester,
Agent for Applicants.