Year: 1888

page_text: I GERHARD BURTSCHEIDT Manufacturer of Dülken in the Kingdom of Prussia and
German Empire 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, that is to say:―
This Invention of improvements in weaving pile fabrics consists in an improved
method of combining the pile and binding threads with the object of obtaining with a
power loom a fabric having as firm and erect a pile as in fabrics made by hand.
Notwithstanding the efforts that have been made to obtain this result it has not hereto-
fore been found practicable to produce in a power loom woollen plush or pile fabrics
woven face to face in such a manner as to enable the pile threads after cutting to stand
perfectly parallel to one another and erect or perpendicular to the ground as in the
case of hand made fabrics. This defect is the result of the arrangement of the binding
warp threads as usually woven in fabrics of this description.
And in order that the said Invention may be fully understood I shall now proceed
more particularly to describe the same and for that purpose shall refer to the soveral
Figures on the annexed sheet of drawings the same letters of reference indicating
corresponding parts in all the Figures.
Figure 1 of the accompanying drawings is a diagram representing a section of a
fabric made by hand with the pile threads uncut.
The action of the latter causes the
pile threads to assume when beaten up, the position indicated in Figures 2 and 3 this
being especially the case when only one pile thread is employed.
In the diagrams the pile threads are marked p the warp or binding threads a and the
weft threads b.
Figure 2 is a diagram of the back of the hand made fabric and Figure 3 represents
a similar fabric in section with two warp threads.
In the case of double fabrics woven face to face, on the other hand, the pile is formed
by two threads and in such a manner that each length of pile is formed by two
combined threads crossing each other sideways in passing from one ground to the
other as indicated in Figure 4. This Figure represents an uncut double fabric, p being
pile threads a warp threads and weft threads. The fact of the pile threads crossing
each other involves a certain obliquity of the threads p as in Figure and a divergence
US+]

page_text: of the cut ends as indicated in Figure 6. This figure represents a double woven
fabric after cutting and with one warp or binding thread.
Figure 7 represents a double fabric such as that illustrated in Figure 4 in section
with one binding warp thread and shews how the tendency of the cut pile threads to
diverge is favoured by the one sided action of the warp threads a on the right hand
side of the pile thread below the upper ground and on the left hand side above the
lower ground and vice versa.
According to my Invention a second or extra warp thread a Figure 8 is introduced
or combined with the binding threads illustrated in Figure 7 in order to cause the pile
to stand erect and firm. A fabric with two warp threads as illustrated in Figure 3 is
thus obtained the back of which is represented in Figure 9 which shews the pile
threads in the rectified positions which they are thus caused to assume in a double
fabric. When the pile is cut this fabric presents the same regular and uniform pile as
the hand made fabric (Figure 3). The pile threads being supported between the two
warp threads a and a' maintains when cut a perfectly erect position perpendicular to
the ground so that it cannot be distinguished from hand made goods. The pile threads
are firmly connected to the ground and assume a position parallel to one another after
they are cut.
Having now particularly described and ascertained the nature of the said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
A binding for double woven plush or pile fabrics in which the pile thread in the upper
and lower grounds is bound between two upper and lower warp threads substantially
as herein beforo described.