Improvements in the Manufacture of Double Pile Fabrics.
Year: 1896

page_text: Date of Application, 25th Aug., 1896-Accepted, 24th Oct., 1896
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Double Pile Fabrics.
We FRIEDRICH KRUGMANN Junior and WALTER KÜPPER of 47/49 Berliner
Strasse Elberfeld, in the Empire of Germany, Manufacturers 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 manufacture of double pile fabrics, in which two
fabrics are woven face to face, and the pile-warp-threads are tied by single picks
of weft alternately into the ground part of each of the two fabrics, and afterwards
the pile-warp-threads are cut between the two fabrics, so that the said fabrics are
separated from each other.
In the manufacture of double pile fabrics in which a single pick or thread of
weft is employed to tie pile-warp-threads into the ground portion of each of the
two fabrics woven face to face, each pick or thread of weft employed to tie pile
into either of the two fabrics being woven face to face has hitherto been always
preceded or followed by at least one pick or thread of weft which is not brought
into engagement with pile-warp but merely passes between the ground-warp-
threads of the fabric in the same manner as the adjacent pick or welt-thread which
"ties" pile-warp into such fabric.
The object of our invention is to improve the manufacture of double pile fabrics
of the said kind by dispensing with the employment of picks or threads of weft
which do not tie pile-warp into the fabrics being woven face to faco, and so enablo
the quantity of fabric produced in a loom to be largely increased.
According to our invention we employ in the formation of the ground portion of
each of the two fabrics to be woven face to face in the manufacture of a double
pile fabric of the said kind, two or more ground-warp-threads in conjunction with
each thread of pile-warp employed in the formation of such double-pile fabric, and
we cause the ground-warp-threads to be crossed before or after the insertion
between them of each pick or thread of weft, and also cause pile-warp-threads to
be engaged with or tied by every pick of weft. We thus place in each "shed"
or opening of the ground-warp-threads only one pick or thread of weft, thus
making each pick or thread of weft in each fabric tie pile-warp into such fabric.
In order to more clearly illustrate the manner in which our invention may be
carried into effect we have in the accompanying drawing furnished in Figs. 1 and 2,
diagrams illustrating the manuer in which double pile fabrics may be constructed
or produced according to our invention.
Fig. 1 is a diagram of the ground portion and face or pile of one of the two
fabrics forming a double-pile fabric showing clearly both the binding of the
ground-warp-threads with the picks or threads of weft, and the tying or binding of
the pile-warp-threads by the picks or threads of weft. Fig. 2 is a diagrammatic
longitudinal section through such double-pile-fabric. The weft-threads are
indicated by the lines marked (a), the ground-warp-threads are indicated by the
lines marked (b), and the pile in Fig. 1 and the pile-warp-threads in Fig. 2 are
indicated by the lines marked (c). The dots at the ends of the lines (c) in Fig. 1
indicate the pile projecting from the ground portion of the fabric. In these
diagrams it is cloarly shown that the pile-warp-threads are moved so as to be tied
into the ground portion of one fabric and into the ground portion of the other
fabric alternately. It is also clearly shown that there are no picks or threads of
weft which do not tie pile-warp-threads into one or other of the fabrics forming
the double pile fabric. From these diagrams it is also clear that in the ground

page_text: portion of each of the two fabrics woven together there are four ground warp
threads for each thread of pile-warp and that the threads of ground warp in each
fabric are made to cross after the insertion of every pick of weft inserted into such
fabric. The said diagrams also indicate that the ground-warp-threads next to each
thread of pile-warp in each of the said two fabrics are made to pass behind the
weft in such fabric at the same time as the said thread of pile-warp so as to secure
such thread of pile-warp in the said fabric.
Although we have in our diagrams illustrated a double-pile-fabric in which in
each of the two fabrics into which a thread of pile-warp enters there are provided
in conjunction with such thread of pile-warp four threads of ground warp to he
employed in the formation of the ground of such fabric, we would have it under-
stood that in each of the two fabrics forming a double-pile-fabric manufactured
according to our invention, there may be provided in conjunction with each thread
of pile warp two or any greater unmber of threads of warp to be employed in the
formation of the ground portion of each of the two fabrics forming the double-pile-
fabric as may be desirable or necessary according to the nature of the material of
which the pile fabric is to be formed. We would also have it understood that so
long as the ground-warp-threads of two fabrics being woven face to face are so
moved that in each fabric the ground-warp-threads are crossed between overy pick
of weft inserted into such fabric and the next pick or thread of weft inserted
therein and one at least of the ground warp-threads next to each thread of pile-
warp in such fabric is made to pass behind the weft in such fabric at the same time
as such thread of pile-warp so as to secure the said thread of pilo-warp in the said
fabric, the warp-threads to be employed in the formation of the ground portions of
two fabrics forming a double-pile-fabric manufactured according to our invention
may be so moved during the weaving that the alternate ground-warp-threads shall
be moved in directions opposite to that in which the other ground-war-threads
are moved, or that such ground-warp-threads shall be moved in pairs or in other
groups as may be considered desirable. A double pile fabric may be manufactured
according to our invention either in a loom in which one shuttle only can be thrown
at once or in a loom in which two shuttles may be thrown simultaneously so that
one of such shuttles shall insert a pick or thread of weft in one of the two fabrics
being woven face to face while the other of such shuttles inserts a pick or thread
of weft into the other of such two fabrics..
Double-pile fabrics may be manufactured according to our invention from dyed
or undyed yarns of any kind which it may be desirable to employ and after boing
woven auch fabrics may be subjected to any other process or processes to which it
may be desirable or requisite to subject them.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what mannor the same is to be performed, we declare that what we
claim is :-
1. A pile fabric, such as is hereiubefore described in the manufacture of which
two pile fabrics are woven face to face and afterwards separated and each pick of
weft in each of the two fabrics woven faco to face is made to tie pile-warp into the
ground portion of such fabric.
2. A pile fabric, such as is hereinbefore described, in the manufacture of which
two pile fabrics are woven face to face, and afterwards separated, and each pick of
weft in each of the two fabrics woven face to face is made to tie pile-warp into
the ground portion of such fabric, and the ground warp-threads in each of the said
two fabrics are made to cross between each pick or thread of weft and the next.
Dated this Twenty-fourth day of August 1896.
HOWARD
CHEETHAM,
Manchester, Agent to the Applicants.