Year: 1886

page_text: Date of Application, 19th July, 1886.
Complete Left, 19th Apr., 1887.
Complete Accepted, 20th May, 1887.
We JAMES SCHOFIELD of Crofthead Littleborough in the County of Lancaster
Manufacturer and SAMUEL HILL of Duke Street Rochdale in the same County,
Manufacturer do hereby declare the nature of this Invention to be as follows:―
Our Invention relates to the weaving of fabrics which are required to be formed
with isolated patches which are thicker or stronger than the main body or ground
cloth of the material as for example our Invention is applicable in the production of
certain descriptions of cloths used in filter presses. For the purposes of our Invention
we employ two warps or sets of warps. In the cases wherein only one patch is
required in the width of the cloth we employ a separate warp of a width suitable
tothe width of the patches and we weave this warp in either throughout the length
of the cloth or only during the time required to form each patch. In the former
case the thicker patch is formed by weaving in an additional weft at the required
places. By way of example we will describe one way in which we effect
this. We draw the narrower warp into a separate set of healds. During the
weaving of the ground cloth these auxilliary healds are lifted and lowered
along with the ordinary healds but during the formation of the patches they aro
worked in alternation with the ordinary healds the one set of healds being at rest when
the other set is at work. We use an auxilliary shuttle which may carry a stronger
weft than the ordinary shuttle the picks of the said auxilliary shuttle alternating
with those of the ordinary shuttle. When weaving in the auxilliary warp only
during the formation of the patches an auxilliary shuttle need not be used but the
ends of the said narrower warp float over the intervals between the patches and have
to be cut away or removed.
DUTTON & FULTON,
1, St. James Square, Manchester,
Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in the Weaving of Fabrics of Irregular Thickness.
Wo JAMES SCHOFIELD of Crofthead Littleborough, in the County of Lancaster
Manufacturer and SAMUEL HILL of Duke Street, Rochdale, in the same County,
Manufacturer, 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, that is to say :—
Our Invention relates to the weaving of fabrics which are required to be formed
with isolated patches which are thicker or stronger than the main body or ground
cloth of the material as for example our invention is applicable in the production of
certain descriptions of cloths used in filter presses. For the purposes of our invention
we employ two warps or sets of warps. In the cases wherein only one patch is
required in the width of the cloth we employ a separate warp of a width suitable
to the width of the patches and we weave this warp in either throughout the
length of the cloth or only during the time required to form each patch. In the
former case the thicker patch is formed by weaving in an additional weft at
the required places. By way of example we will describe the weaving of a filter
cloth. For this purpose we employ two sets of healds and two warps a wide
warp and a narrow warp. The wide warp is divided into two parts which with
the narrow warp make up the full width of the cloth. The wide warp is drawn
into one set of healds and the narrow warp into the other set. During the weaving
of the ground or main body of the cloth the auxilliary healds carrying the
narrower warp ends are lifted and lowered in concert with the ordinary healds
that is to say with the other set of healds so that a shed is formed across
the full width of the cloth but when the patch is being formed the two
sets of healds are worked to open the shed in alternation all the ends in
one warp being at the top or bottom of the shed as the case may be when the
shed is open in the other warp. We use an auxilliary or second shuttle which may
carry a stronger weft than the ordinary shuttle the picks of the said auxilliary shuttle
alternating with those. of the ordinary shuttle. During the weaving of the main body
of the cloth this auxilliary shuttle is out of use but when the weaving of the patch
commences it is brought into use. The weft carried by this auxilliary shuttle is not
woven into the full width of the cloth as when it makes its picks the main set of healds
do not open the shed in the main warp the consequence being that the auxilliary weft is
only woven in with the narrower warp and so forms a thicker patch. When a
patch of the required size has been formed the auxilliary shuttle again goes out
of use until it is again required in the weaving of another cloth. This method may
be varied by making the main warp a complete warp of the full width of the
cloth a thicker patch being thereby obtained but in such a case there would also
be a band in the direction of the length of the cloth of less thickness than the
patch but thicker than the main body of the cloth. When weaving in the auxilliary
warp only during the formation of the patches the main warp is also complete of

page_text: the full width but an auxilliary shuttle need not be used. In weaving by this method
the ends of the said narrower warp float over the intervals between the patches and
have to be cut away or removed. In such a case the additional thickness is obtained
by weaving in the narrower warp in addition to the ordinary warp.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed we declare that what we claim is :-
(1) In the weaving of cloths of irregular thickness the employment of two sets of
warps drawn into two sets of healds and of two shuttles carrying two wefts the warps
and shuttles being operated substantially in the manner set forth.
(2) In the weaving of filter cloths the employment of two warps a main warp in two
parts and a narrower warp which with the main warp forms a complete warp of the full
width, and the employment of an auxilliary shuttle which passes weft through the shed
of the narrower warp only and is in use only when a thicker patch is being woven in
the cloth and when in use acts alternately with the ordinary shuttle the warp end
being operated accordingly.
(3) In the weaving of filter cloths the employment of a narrow warp in addition to
the ordinary warp the said narrow warp being woven in only at the places where
thicker or stronger patches are required as set forth.
DUTTON & FULTON,
1, St. James Square, Manchester,
Agents.