An Improved Pile Cutting Device for Use in Looms for Weaving Smyrna Carpets.
Year: 1897

page_text: Date of Application, 8th Dec., 1897-Accepted, 15th Jan.,
1898
An Improved Pile Cutting Device for Use in Looms for Weaving
Smyrna Carpets.
I, BERNHARD MILCKER, of Hilden, Düsseldorf, Prussia, Germany, Dyer, do hereby
declare the nature of this Invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:-
This Invention relates to an improved pile cutting device for use in looms for
weaving Smyrna carpets, and consists substantially in a simple knife moving in a
kuife-race which serves at the same time for the reception of the pile threads as
hereinafter more particularly described.
On the accompanying drawings:
Fig. 1, represents the cutting device in transverse section;
Fig. 2, is a front elevation;
Fig. 3, is a plan; and
Fig. 4, is a diagram illustrating the operation.
a, represents a series of arrow-shaped heads or points adapted to enter between
and to catch the pile threads, and which are all rigidly secured to a knife frame e,
side by side and in the same vertical plane, as shown in Fig. 3. Each head a,
has a groove, b, through the series of which a knife c, used for cutting the pile
threads can work. The knife is moved from side to side of the loom with a rapid
motion cutting the pile threads with its forward edge, and traverses the same
path in both directions. The kuife is, by any convenient meaus (permitting of its
ready detachment,) attached to a head, d, which, in the construction shown in the
drawings, is guided by rails, e, f.
Fig. 4, represents the burls or loops, k, to be cut by the knife, and indicates the
moment when the knife cuts the loops formed in the pile threads, 9, when the
latter is already so secured by the chain threads, h, and the wefts, i, as to be
At the moment shown in Fig. 4,
satisfactorily retained after the loops, k, are cut.
the knife, c, shoots through the pile points, a, and cuts the burls.
After this, the entire knife guide, e, f, rises so far that the pile points a, rise
clear of the fabric and then moves horizontally forward in the direction of the
arrow,, until the pile threads g, have passed through the spaces, m, between the
adjacent pile points a, and have automatically spread sideways over the notches, n,
of the pile points. This automatic action of the pile threads is caused by two
adjoining threads being engaged in each of the spaces, m, and by the tension
inherent to the threads (by reason of their being drawn taut) which, as soon as
they have passed upwards through the narrowest part of the spaces, m, causes them
After the threads have assumed their
to spread sideways over the notches, n.
correct position over the notches, n, the whole knife frame, carrying the pile
points, a, returns and descends to its original position, rile Fig. 4.
The knife itself is, when not in use quite at the end of the frame so
as not to touch the pile threads in the said to and fro movements of the knife frame.
The return of the frame causes the pile points to carry with them the pile threads,
!
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page_text: and the heddles working the latter carry the same to the lowest position, whilst,
at the same time, the chain threads, h, for binding the fabric move upward. After
the shooting of the weft and its being driven against the made cloth by the batten,
the pile threads are tied in. By repeated up and down motion of the chain and pile
threads (effected by the proper healds) the cloth is tied or made as shown in
Fig. 4, and as required for securely holding the pile when the burls formed over
the pile points, a, have been cut. As soon as this binding of the threads is effected
and the threads, h, g, have resumed their original positions, the knife shoots through
the pile points and the burls are cut.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is:-
A pile cutting device for carpet looms, characterized by pile points, a, arrow-headed
or sharpened below, their number varying according to that of the pile threads,
which points are moved towards the pile threads, g, by the knife frame, e, f, in
which said points, a, are secured, in such a manner that the pile threads pass,
between and to the upper part of the pile points which are suitably shaped for the
reception of said threads in order that the threads may be carried back with the
frame when the latter is making its return movement, a knife, capable of motion
from side to side relatively to the loom, being guided in the frame through 2
grooves, b, embraced by the pile threads, so that the loops are cut, as set forth.
Dated this 8th day of December 1897.
DAY, DAVIES & HUNT,
Chartered Patent Agents,
321, High Holborn, London, W.C., Agents for the Applicant.