Improvements in Warp-knitting or Crocheting-machines.
Year: 1892

page_text: Date of Application, 16th Apr., 1892-Accepted, 28th May, 1892
COMPLETE SPECIFICATION.
Improvements in Warp-knitting or Crocheting-machines.
I, GEORG BUHLMANN of 6 and 7, Hausvoigtei Platz, Berlin, in the Kingdom of
Prussia, German Empire, Manufacturer do hereby declare the nature of this inven-
tion 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 my invention is to provide such parts on a crocheting-machine,
that fabrics resembling plush may be produced by the same, and my invention
consists in adding to a crocheting-machine of usual construction a suitable looper
round which the pile-threads are laid. I may also combine with the said looper a
knife serving to sever the pile-threads after the loops have been formed, whereby
the nap is produced, giving to the fabric a velvet-like appearance. The loops of
the pile-threads may however remain as such, and in this case the knife is
dispensed with.
In order to make my meaning clear, I have appended hereunto a sheet of
drawings, on which:
Fig. 1 is a sectional elevation of my improved machine,
Fig. 2 is a sectional plan taken on line x-x of Fig. 1,
Fig. 3 is a side-elevation, the warp-thread holder and the upper part of the
machine being omitted.
:
I
Similar letters denote similar parts throughout the several views.
The construction of the crocheting-machine is in its main parts the usual one.
n are the crocheting-needles moving to and fro, r is the warp-thread holder, moving
laterally in a direction perpendicular to the needles », and having also an inter-
mittent oscillating motion round the rod p, as indicated on Fig. 1. This holder is
at its front end provided with holes through which the warp-threads are passed.
h is the pile-thread holder, being a short sleeve and g is the weft-thread guide ;
both parts h and 9 are moved laterally to and fro in the same direction as the warp-
thread holder r. k is the warp-thread, m are the pile-threads and w the weft-
threads. s is a stop preventing the warp-threads from moving too high upwards.
is a rod on which the fabric rests. As will be seen in Fig. 3, I secure to the
frame of the machine a series of vertical bars b, the lower end of which I prefer
to make tapering and which serve to form the loops of the pile-threads m,
wherefore I have called them loopers. When it is desired to cut the pile-threads
after having formed the loops, I make the looper 6 tubular at its end and arrange
a knife o below the same, the point of said knife entering the looper b.
loopers 6 and the knives o are secured to the frame of the machine and are not
displaced together with the other parts of the same.
The operation of the machine is the following:
The
The warp-threads and weft-threads are interwoven into one another in the usual
manner by the reciprocating movement of the needle n, and by the lateral displace-
ment of the warp-thread guide 7. At the same time the pile-threads m are moved
sideways and thus laid around the looper b.
At the next movement of the needle n the pile-threads m are completely formed
into a loop, and also interwoven into the ground formed by the warp-threads k and
the weft-threads w. The latter may of course also be formed by ornamented
strings or bands. In consequence of the tapering form of the looper 6 the loop
of the pile-threads m glides down along said looper, this movement being
favourized by the downward oscillation of the warp-thread holder r. Thus when
the knife o is not employed the loops of 'the pile-threads will gradually slip off
the looper b, and thus a band or lace of a looped fabric is produced. When
adjusting the knife o below the looper b, the loops of the pile-threads m cannot

page_text: glide off, but are cut by the edge of the knife o, whereby the fabric of plus n-
or velvet-like appearance is obtained. The pull of the fabric, which is delivered in
the direction indicated by Fig. 1, is sufficient to cause the pile-threads to be
severed by the knife o.
It is obvious that the knives o are removable, so that the crocheting-machine
may be employed as desired for the manufacture of one or the other kind of
fabrics mentioned above.
Having now particularly described the nature of my said invention, and in what
manner the same is to be performed, I declare that what I claim is :—
1. The combination, with the parts of a crocheting-machine acting on the
warp-and weft-threads, of the reciprocating pile-thread holders (½) and the immobile
loopers (6), for the purpose as described.
2. The combination, with the parts of a crocheting-machine acting on the
warp and weft-threads, of the reciprocating pile-thread holders (h), the immobile
loopers (6) and stationary knives (o), for the purpose as described.
_1 1902
GEORG BUHLMANI
By John P. O'Donnell,
Agent for the Applicant.
GEORG BUHLM
By John P. O'Donnell,
Agent for the Applicant.
NN,