Improvements in Ribbon Material and Gauze and other Woven Material, and in Looms for the Manufacture of same.
Year: 1896

page_text: Date of Application, 6th Nov., 1896-Accepted, 19th Dec., 1896
COMPLETE SPECIFICATION.
Improvements in Ribbon Material and Gauze and other Woven
Material, and in Looms for the Manufacture of same.
I, JOHANN KONRAD SCHUMACHER of No. 7 Dabringhauserstrasse Wermel-
skirchen in the Kingdom of Prussia 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 :-
The object of this invention is to produce fabrics with selvedges so that ribbons.
can be cut out of them in the direction of the warp threads, said selvedges not
being liable to unravel or fray, and to produce gauze and other fabrics strengthened
by means of selvedges along the edges and in intermediate places.
Figs. 1 and 2 of the accompanying drawing represent two positions of the parts.
of the loom constructed to make such selvedges, and Fig. 3 shews enlarged the
position of the threads spread apart in a piece woven with selvedges that will not..
unravel when cut up into ribbons.
At least five heald bars K, K₁ K, K, and K, are generally necessary.
W₁ represents the warp beam or the warp, W, the warp of the moving or twining
thread, and W, the fabric produced shewn with selvedges woven in, marked by
two thick lines in each place where the piece may be divided up in ribbons. For
clearness' sake only four warp threads 1, 2, 3 and 4 and the moving thread A are
shewn. The threads 1 and 3 as well as the threads 2 and 4 are shewn somewhat.
apart although in reality close together. Each selvedge warp thread is passed
through a separate guide eye viz. for the thread A is provided the eye A, in Ko
for the warp thread 1 the eye A₁ in K₁, for the thread 2 the eye A, in K,, for
the thread 3 the eye A, in K,, and. for the thread 4 the eye A, in K4. The heald
of K, from L, to L, is longer than the distance between the upper and lower bar;.
it passes from L₁ Fig. 1 twining or. winding itself round the threads 1 at the
point F, round the threads 2 at the point F, round the threads 4 at the point F
and round the threads 3 at the point F. The cord having the four threads 1, 2,
3 aud 4 twined round it forms a four sided pyramid having its apex at E the place
for the last weft thread.
When the bar K, is raised as in Fig. 1 the bars K, and K, rest the one up and
the other down during two shots, hold the shed open and the cord with the four
threads in tension, while the bars K, and K, shift with the other corresponding
healds. When the bar Ko is drawn down the eye A, slides round the threads 1, 2,
3 and 4 to the down position Fig. 2. Then the bar K, rests again during two.
shots, and so also the bars K, and K, so that the cord remains in tension, while
the bars K, and K, shift with the other corresponding bars of the loom.
When
the bar K, is raised again, the eye A, slides up in the opposite direction around the
four warp threads. With the eye the twining thread A passes round the four warp
threads each time and the apex of the pyramid is woven in at E. As the twining
thread after each two shots has wound round two or more warp threads and is itself
woven in, the unravelling of the selvedge of the ribbon becomes impossible.
This construction is also suitable for weaving other fabrics especially gauze,.
which is strengthened by the selvedges.
In Fig. 3 the twining thread A is shewn wound round four adjoining warp
threads B. The weft threads are represented by 1 to 8. The dotted lines a-a.
represent the lines along which the material is cut to form ribbons.

page_text: 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 :-
1. Heald mechanism for looms in which a twining thread A during the up and
down stroke of the guiding heald K, is wound completely round four or more
warp threads in pyramidal form and is woven firmly into the fabric substantially
as set forth.
2. A woven fabric with not-fraying or unravelling selvedges along the edges
and if desired in intermediate places substantially as and for the purposes set
forth.
Dated this Sit
of New
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.