An Apparatus for Trimming the Selvedges of Cloth whilst Weaving.
Year: 1899

page_text: An Apparatus for Trimming the Selvedges of Cloth whilst Weaving.
I, DANIEL MUNSON SEATON, of Soho Mills, Thornton Road, in the City of Brad-
ford, Machinist, do hereby declare the nature of this invention to be as follows:-
This invention has for its object, the construction of apparatus by which yarn
threads projecting beyond the cloth selvedge, may be removed therefrom as the
cloth is being woven, and thus improve the appearance of the cloth by making
the selvedge more perfect.
In carrying out my object, I secure to the loom frame in any convenient manner
and position at each edge of the cloth, a frame having cam paths placed opposite
to each other, between which are two arms jointed together at one end and guided
where jointed in lateral paths, and for simplicity in further describing the nature
of my invention, I will confine myself to one piece of mechanism placed at one
edge of the cloth, that at the other edge being of the same construction.
Projecting from the before mentioned arms, are pins engaging with the cam
paths, and at the outward end of the arms are pads for securing the cloth on the
closing of the arms, which is effected by the contour of the before mentioned
cam paths. A knife is fixed to one of the arms, and mounted to the base plate
of the frame, is a rotating shaft supporting a rotating knife, which in its rotation
passes through slots in the before mentioned arms, and in contact with the face
of the fixed knife.
A cam secured on the before mentioned shaft operates the arms in a linial
direction, the outer end of the arms opening out when travelling towards the
cloth, and at the termination of the stroke, 'the arm ends are brought together,
the before mentioned pads gripping the cloth near the edge of the same.
On the return stroke, the cloth still gripped, is stretched to a degree for bring
ing the selvedge to the face of the fixed knife, and while held in this position,
the rotating knife passes over the face of the fixed knife, cutting away any pro-
jecting pieces of weft; then the arms are liberated by the cam paths and re-
turned outwards for making another grip of the cloth and stretching same for
the operation of cutting to be repeated.
Dated this 2nd day of October 1899
=
An Apparatus for Trimming the Selvedges of Cloth whilst Weaving.
1. DANIEL MUNSON SEATON, of Soho Mills, Thornton Road, in the City of Brad-
ford, Machinist, do hereby declare the nature of this invention and in what
[Price 8d1

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:
This invention is applicable to that class of cloth weaving looms in which the
yarn is drawn from one or more large bobbins mounted clear of the lay beam,
and in which the yarn is automatically measured and cut into lengths for in-
sertion in the web of the cloth; and has for its object, the construction of an
apparatus by which yarn threads projecting beyond the selvedges of the cloth
being woven are cut, thus improving the appearance of the cloth by making the
selvedges more perfect.
In describing my invention in detail, reference is made to the accompanying
sheet of drawings in which Fig. 1 represents the frame of a loom with my im-
provement added and placed in the position in which it may be fitted.
Fig. 2 is a detached front elevation of a portion of my apparatus suitable for
the left hand of the loom, that on the right hand portion is of similar construction,
and in describing my invention, reference will only be made to the apparatus
fixed on the left side and shown more particularly by the detached details.
Fig. 3, is an end view of Fig. 2, looking to the left.
Fig. 4, is a plan view of Fig. 2, with the circular cam removed for more clearly
showing the mechanism below, and
Fig. 5, is a sectional plan view through line a, b, showing the arrangement of
one of the cam plates for operating the opening and closing cloth gripping arms.
The cam plate on the opposite side with which the opposite edge of the arms en-
gage is of the same construction.
Similar letters and numerals indicate similar parts where they appear, and
Figs. 2 to 5 are drawn to an enlarged scale.
In carrying out my object I secure to the loom frame A. in any convenient
manner and in a position near to the breast beam B, my trimming apparatus,
the heads or frames of which are supported by two bars D, D, and adjustable
thereon to adapt the apparatus to the various widths of cloths capable of being
woven by the loom.
Each head or frame is composed of two cam plates E and E¹, placed opposite
to each other and held apart by distance bars F, and each cam plate is arranged
with a slotted extension. & G. Between the cam plates E and E are two arms I
and H coupled together at one end by a stud arranged so as to slide in the
holes of slotted extensions G and G¹, by which one end of the said arms are
guided, the said stud extending some distance through the slotted arm G¹, engages
with the groove K of rotating cam K¹ secured on shaft L driven by pulley M
from some convenient part of the loom.
Projecting from the before mentioned arms H and H', are short pins engaging
with the respective grooved cam paths N, N, similar cam paths being formed in
each cam plate E and E, and at the deep end of the arms H and H¹ at C, the
interior surfaces are lined with some suitable yielding material for gripping the
cloth on the closing of that end of the arms which I term the jaw ends.
The reciprocation of the arms H and H¹ in a lateral direction is effected by
the before mentioned rotating cam K', and by the pins of arms H and H', engag
ing with the grooved paths N, N of the respective cam plates, the jaw ends of
the said arms are caused to open and close, opening during the portion of stroke
when travelling towards the centre of the cloth over a portion of the cam path,
and closing when travelling over the remainder of the curved cam path, causing
the jaw ends on closing to grip the cloth to some extent and stretch same during
the retreat of the arms H and H', along the straight portion of the cam grooves.
The respective division plates P dividing the curved from the straight portion
of the grooved cam paths is pivotted in the centre, and provided with springs Q
and Q as shown for the purpose of ensuring the before mentioned pins taking
the proper course in the reciprocations around the grooved cam paths.
To one of the arms H or H¹ is secured a knife R, and mounted to a boss secured
on the rotating shaft L, is a knife R¹, which on rotation and when the jaw ends

page_text: of arms H and H' are gripping and stretching the cloth, passes through slots S
cut in the said arms, and in contact with the face of knife R, thus forming shears
and cutting away any yarn projecting from the selvedges.
By the arms H and H¹ reciprocating in a lateral direction and opening and
closing at the jaw ends in a manner so as to grip hold of the cloth near to the
edge of same, the arms of both edges of the cloth acting simultaneously, on the
return stroke of the said arms, the cloth still gripped, is stretched to a degree
for bringing the selvedges to the face of the respective fixed knives R, and while
the cloth is held in the stretched position, the rotating knives R¹ pass over the
surface of the fixed knives R, cutting away any projecting pieces of weft, then
on the rotating knives clearing the selvedges, the arms liberate the cloth, and on
again travelling towards, the centre of the cloth they are operated in a direction
for gripping and stretching the cloth for the cutting to be repeated.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
Mechanism in which are combined arms H and H', knife R, cam paths N, N,
rotating cam with a rotating knife R' arranged and operated substantially in the
manner and for the purpose as herein before set forth.
1000
000 oun TO
JOHN WAUGH,
Agent, Sunbridge Chambers, Bradford.
day
TO SI Diet