Machines and to similar Machines for Treating Textile Fabrics.
Year: 1888

page_text: Machines and to similar Machines for Treating Textile Fabrics.
WO JOHN WALTON of Irwell Bleach Works, Pendleton, Salford, in the County of
Lancaster Bleacher, and ALFRED EDMESTON of the firm of A. Edmeston & Sons of
Cannon Street Works, Salford in the said County, 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 is applicable to "back starching" or filling machines and other
mangles for treating textile fabrics, where a doctor is or may be used to remove starch
or other material from the surface of the roller or bowl made of wood, cotton or
other similar soft material the surfaces of which rollers or bowls are liable to be
scratched or grooved by hard particles coming between the doctor and the roller or
bowl which render it necessary to have the latter frequently returned to remove the
grooves from their surfaces and make them smooth and even, otherwise the starch or
other filling material would be conveyed by the grooves to the face of the fabric thus
spoiling its finish.
The "doctors" commonly employed in "back starching" machines are stationary,
and to overcome the scratching or grooving of the surface of the roller or bowl as
before explained, it has been proposed to give an end to and fro motion to the
"doctor" but this has not been found effective as the end motion of the doctor was
produced by a cam upon the axis of the bowl or roller, or geared with it so that a
point or projection under the "doctor" would describe exactly the same line or path
upon the surface of the bowl repeatedly and thus would cause it to be grooved.
Our invention consists in giving end motion to the doctor acting upon the surface
of the roller or bowl by a cam crank excentric or other means so geared with the
roller or bowl, or so otherwise arranged, that a point upon the doctor will only come
over the same point on the surface of the roller or bowl once in several revolutions
of the roller or bowl, and will then only do so for an instant; the doctor when thus
arranged acting to efface any groove liable to be formed, as in this case should a hard
lump come between the doctor and surface of the roller or bowl, such lump leaves
and has time to get clear of the doctor before the complete cycle of revolutions would

page_text: bring the point repeatedly back along the same line or path and not only so but one
lump tending to make a groove in the surface of the roller, as before said, acts to
efface the groove formed or partly formed by itself and those grooves formed or
partly formed by other lumps.
We prefer to employ to carry out our invention a double acting cam, upon a stud
in the framing, this cam being rotated by a wheel gearing with one upon the shaft
or axis of the roller or bowl taking care not to use wheels of equal diameters or which
will divide one by the other without remainder, but such as will require several
revolutions before the doctor and roller or bowl are in the same position the one in
relation to the other.
The cam acts upon a bowl in one end of a lever, on a stud in a bracket from the
framing, and the other end of the lever is coupled by a rod with the axis of the
doctor to slide it to and fro in its bearings.
A cam may be used directly upon the axis of the roller or bowl, and this cam may
act through a lever directly upon the doctor, but in this case mechanism would be
required to alter the position of the doctor in the direction of its end motion in
relation to the lever actuated by the cam to get a sufficient range or cycle of changes
of position, but such arrangement though one way of carrying our invention into
effect would not be so simple as that above referred to.
Fig. 1 is a side elevation of parts of a back starching or filling mangle or machine,
and fig. 2 is a front elevation of so much of one side of the machine as will be
required to explain our invention.
a is the framing, b the roll of cloth to be back starched or filled-The cloth passes
from the roll under a bar and over another bar 62 into the starch box c in which
the wood or cotton roller or bowl d rotates.
It will be seen that the cloth passes close against the underside of the roller or
bowl d and before leaving the bowl is acted upon by a doctor e which presses the
cloth upon the bowl, it then passes a brush fand is taken away in the ordinary
manner. is a doctor secured to a part g¹ having its shaft or axis g' in bearings on
the side frames.
This doctor g acts directly upon the surface of the roller or bowl d to remove
starch or other materials from it, and it is this doctor y and others acting for the like
purpose which in the common arrangement is liable to groove the surface of the
roller or bowl d and to which our invention applies.
The parts shown by figs. 1 and 2 above referred to are ordinary and well known
parts of back starching or filling machines.
In the part gl to which the doctor g is secured a stud 93 is fixed to which one end
of a rod is jointed-This rod g is or may be made adjustable in length by a right
and left handed screw coupling as shown-The other end of this rod is jointed to
one end of a lever h having its fulcrum ¹ on a bracket 2 on the framing the other
end of which lever has a stud in it which carries a bowl working in the groove of
a double acting cam i which rotates on a stud in the framing, this cam i having a
wheel upon its boss that gears with one on the axis of the roller d.
The two wheels 2 and 3 are not of equal diameters ono wheel having say 31 teeth
to 25 teeth in the other wheel.
We do not limit ourselves to the arrangements described for carrying out our
invention as it is obvious that our invention may be carried out by a variety of
arrangements of mechanism.
For instance the cam i might be placed to rotate on a stud so that its groove
would act upon a bowl on a stud carried on the end of the shaft g² for the doctor g
or the cam could act on a bowl in a part arranged to slide in the lengthway of the
shaft and connected therewith by forked projections on the sliding part coming
into a neck formed by collars or shoulders on the shaft g so that when required the
doctor could be readily lifted from and replaced in its bearings when required.
The cam in this case could be. rotated by two spur wheels, as hereinbefore explained,
in reference to figs. 1 and 2 or by a cord or belt from any convenient rotary shaft
though preferably from a shaft having rotary motion when the machine is working.

page_text: 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. In back starching or filling machines or other machines where a doctor (g) is or
may be used for a similar purpose, the giving to such doctor end to and fro motion
in such manner that a point on the doctor, and on the surface of the roller or bowl
will only come together or opposite each other after several revolutions of the roller
or bowl substantially as and for the purpose hereinbefore described.
2. The combination of mechanism for imparting end motion to the doctor (g)
substantially as and for the purpose hereinbefore described.
711
1000
PETER J. LIVSEY,
Agent.