Improvements in the Manufacture of Cut Pile Carpet Fabrics.
Year: 1889

page_text: Date of Application, 19th Sept., 1889-Accepted, 19th Oct., 1889
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Cut Pile Carpet Fabrics.
We HERMANN MÜLLERS and ARTHUR SPINDLER of Dülken in the Kingdom of
Prussia and Empire of Germany Manufacturers do hereby declare the nature of
our Invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement and accompanying
drawings
Our said Invention relates to single woven cut pile carpet fabrics and relates to an
improved method of weaving the same whereby instead of using single picks as
heretofore double picks are employed and the central ground warp is not woven
into the piece.
The figuring is produced by the insertion and withdrawal of
wires into and form the pile warp threads as is usual and as is well understood.
In the accompanying drawings:-
Fig. 1 is a sectional view of our improved fabric before the pile warp e has
been cut.
Fig. 1 is a similar view after the pile c has been cut.
Fig. 2. shows a modification in the mode of weaving.
Figs. 3. 4 and 5 show different positions of the parts of the loom while in the act
of weaving the improved fabric.
In Figs. 1. 1 and 2, a is the central warp which has considerable tension put upon
it. This tension is the more easily applied and preserved since the warp a is not
raised and lowered in the course of weaving. The ground warp & is slacker. The
weft picks 2. 4. 6 and 8 and so on are thrown across the warp a on one side and the
picks 1. 3. 5 and 7 and so on are thrown across on the other side, the picks lying
opposite to each other. These picks engage with the ground warp b. We thus
produce a heavy thick ground such as is necessary for carpeting, the picks lying
directly above each other and being made simultaneously by two shuttles. In single
pick carpet looms as usually employed picks 1. 2. 5 and 4 would follow in succession,
but in weaving with a double pick according to our method picks 1 and 2. 3 and 4
and so on are thrown simultaneously, the warp being suitably raised and lowered to
take these double picks.
Fig. 4
Fig. 3 shows the positions of the parts of the loom for picks 1 and 2.
shows the positions when the wire is being inserted beneath the pile warp c.
Fig. 5
shows the position of the parts for the picks 3 and 4. In all of these views a is the
tightly strained central warp is the slacker ground warp and c is the pile warp.
The ground warp b which is under less tension than the central warp a is coiled on
the roller k and passing over the guide roller d engages with the healds and g by
which it is raised and lowered. The pile warp c comes from rollers or bobbins and is
operated by the heald h. The central tightly strained warp a is coiled on the warp
beam i and passing over the guide rollers d and e extends directly to the drawing
roller without engaging with the healds at all. The cycle of picks is two double
picks each pick being followed by the insertion of a wire so that four revolutions of
the loom shall complete the cycle. With the ordinary single pick loom six revolutions
are required to complete the cycle. In Fig. 2 the picks 1, 3 and 2,4 are shot in pairs
through the same sheds of the warp 6; and as regards the pile warp c the weft
picks 3,5 and 7, 9 and so on are shot in pairs through the same sheds of the pile
warp c so that as shown in Fig. 2 the sheds of the pile warp c alternate with the sheds
of the warps 6 in such a manner as to lock each of the weft picks 1. 3; 5. 7 and so
This method may be used in weaving the courser fabrics.
on.
The circumstance that the central warp is not raised or lowered is of importance
in so far that it presents an unvarying path to the upper shuttle. Were it otherwise,
that is to say were the warp threads a raised and lowered at each pick the constantly
B

page_text: recurring changes in the path of the shuttle would make its progress less certain, but
with the present arrangement of an immovable central warp this disadvantage
disappears. Another advantage of our improved arrangement is that the loom absorbs
less power as the healds have to raise and lower only the comparatively slack warp
threads and the pile warp c, whereas in the case of single pick carpet looms the
whole warp often under considerable tension bas to be raised and lowered. Our
arrangement in addition to the easier working of the loom also admits of a
considerable simplification of the jacquard machine which has only to operate the
warps eat the proper times so as to provide for the insertion of the wires a, the parts
remaining at other times at the bottom of their stroke.
In the ordinary carpot loom the whole warp is operated and a good deal of
unnecessary work is done. In our arrangement half the usual number of cards is
sufficient to do the work.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
h
The manufacture of single woven cut pile carpeting of the indicated nature having
a ground composed of the warps woven into double weft picks which are
simultaneously made with two shuttles the central warp a which is under considerable
tension acting as a path for the upper shuttle in the course of weaving substantially as
described and shown.
Dated this 18th day of September 1889
DUTTON & FULTON,
1, St. James Square, Manchester, Agents.