Improvements in Machinery for Stentering or Stretching Woven Fabrics.
Year: 1890

page_text: Date of Application, 24th Oct., 1890
Complete Specification Left, 24th July, 1891-Accepted, 29th Aug.,
1891
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Stentering or Stretching Woven
Fabrics.
I JAMES WELSH of Bowden Bridge Hayfield in the County of Derby Calico
Printer, do hereby declare the nature of this invention to be as follows:-
This invention relates to machines for stentering or stretching woven fabrics and
especially to short stentering machines of the class known as McCallum's for treating
dry cloth.
In machines of this class the fabric is stretched between chains provided with
clips which catch the fabric as it is fed into the machine and release it as it leaves
the same.
The success of this machine however entirely depends upon the perfectly accurate
feeding by the attendant, as the chains are mounted upon pulleys carried on one and
the same shaft and if the fabric is not constantly kept straight and square by the
attendant it is not properly stentered.
According to my invention however I divide the shaft in the centre so that each
chain or clip pulley is driven by a separate shaft. These pulley shafts are driven
by cone pulleys so arranged that the driving straps can be moved upon them to
alter the speed of either side of the machine as the straightening of the fabric
requires.
The exact arrangement of the strap guides and gearing may of course vary
according to the machine to which my invention is to be applied, but the arrange-
ment I prefer is as follows. The cone pulleys on the pulley shafts are driven by
straps passing round reversed cone pulleys on a shaft above. A sliding rod or bar
carrying strap forks is fitted so as to move one strap on the larger part of its pulley
and the other on the small part of its pulley, the rod or bar is moved by a pinion
gearing with a rack thereon the pinion being on a vertical shaft at the lower end of
which is suitable gearing for actuating another pinion and rack moving a strap
guide near the pulleys on the clip pulley shafts. The straps are thus guided at
both ends simultaneously and can be readily governed by the attendant.
Dated this 23rd day of October 1890.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Machinery for Stentering or Stretching Woven
Fabrics.
0
I JAMES WELSH of Bowden Bridge Hayfield in the County of Derby Calico
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 machines for stentering or stretching woven fabrics and
66 McCallum's" for
especially to short stentering machines of the class known as
treating dry cloth.
In machines of this class the fabric is stretched between chains provided with
clips which catch the fabric as it is fed into the machine, and release it as it leaves
the same.
The success of this machine however entirely depends upon the perfectly accurate
feeding by the attendants as the chains are mounted upon pulleys carried on one and

page_text: the same shaft and if the fabric is not constantly kept perfectly straight and square
by the attendant the machine does not fulfil its purpose.
The object of my invention is to provide mechanical apparatus for straightening
the cloth which is so constructed and arranged that by simply moving a hand wheel,
lever, or equivalent device to the right hand or to the left the movement of either
selvage may be accelerated as required and thus the feeding of the cloth be
may
equalized with the greatest accuracy.
According to my invention I divide the shaft (upon which the chain pulleys are
mounted) in the centre, so that each chain or clip pulley is driven by a separate
shaft.
These shafts are driven by cone pulleys so arranged that the driving straps can
be moved upon them to alter the speed of either side of the machine as the
straightening of the fabric requires.
The exact arrangement of the strap guides and gearing may of course be varied
according to the construction of the machine to which my invention is to be applied,
but I will here describe the arrangement which I prefer to use and which will be
readily understood on reference to the sheet of drawings hereunto annexed and the
following explanation thereof.
Fig. 1 is a front elevation and Fig. 2 an end view (partly in section) of so much
of a stentering machine as is necessary to illustrate the application of my invention
thereto.
a is part of the framing of the machine is a guide roller, c, d are two chain
pulleys which are mounted on two separate shafts d and d so that each clip chain e
is independently driven.
On the outer end of each shaft d, d¹, is keyed a cone pulley f f which
are driven by straps o, o passing round reversed cone pulley's h, h¹ on a shaft i,
above.
A sliding rod or bar k, carrying two strap forks is fitted near the shaft i so as
to move one strap onto the larger part of its pulley and the other onto the small
part of its pulley, and a corresponding sliding rod or bar k¹ with two strap forks l
is fitted near the shafts d, d¹ below.
These sliding rods or bars k and are fitted with racks into which gear pinions m
which pinions are so geared together by the vertical shaft n bevil gear o and
horizontal shaft P that the two sliding bars k and k' and the four strap forks 1, 11
all work simultaneously.
On the end of the horizontal shaft p is fitted a handwheel whereby the attendant
can thus guide the straps at both ends simultaneously, thus having perfect control
over the machine and being able to accelerate the movement of either selvage as
may be required to ensure the perfectly accurate feeding of the machine.
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
In stentering machines of the class hereinbefore mentioned dividing the chain
pulley shaft in the centre and driving each portion thereof by cone pulleys so
arranged that the driving straps can be moved thereon so as to alter the speed on
either side of the machine as the straightening of the fabric may require, and,
Secondly I claim the arrangement of apparatus for governing and moving the
driving straps simultaneously on the cone pulleys, substantially as hereinbefore
described and illustrated by the drawings annexed.
Dh: 991 do of L... 1801
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.