A New or Improved Apparatus for "Rubbing" or "Spreading" the Warp and Weft Threads in Woven Fabrics.
Year: 1899

page_text: Date of Application, 10th Feb., 1899-Accepted, 29th Apr., 1899
COMPLETE SPECIFICATION.
A New or Improved Apparatus for "Rubbing" or "Spreading" the
Warp and Weft Threads in Woven Fabrics.
I, WILHELM GUSTAV ANDRIESSEN, of Hubertusstrasse 166, Crefeld, in the
Empire of Germany, 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; -
This invention relates to an improved apparatus which may be used with
weaver's looms for the purpose of uniformly spreading the warp and weft threads
of silk and part silk fabrics when the same are on the loom in such a manner
they have an equal density throughout. There are already different arrange-
ments for use with looms for "rubbing" fabrics for instance that of Patent 16363
of 1895 but these known arrangements have the fault that they rub the weft
thread but little or not at all, whilst by the present arrangement both the warp
and the weft threads are rubbed with one and the same
rubbing knife
-In
the present invention this is obtained by means of a rubbing knife" which is
given a to and fro movement and operates on the under side of the fabric and
which is mounted at an angle of about 45° to the length direction of the fabric
But in order not to damage the fabric on its longitudinal edges or selvedges when
the knife passes under the same an arrangement is provided for lifting the edge
of the fabric when introducing the knife. The annexed drawing represents a
form of the apparatus shown as an example Fig. 1 is a front view of the apparatus
showing the driving mechanism. Fig. 2 is a side view and partial section on
line II of Fig 1. Fig. 3 shows an enlarged view of the knife carriage. Fig. 4
is a side view of Fig. 3. Fig 5 a plan view of the same. Fig. 6 shows a form
of the device for lifting the edge of the fabric Fig. 7 is a plan view of the
same. Fig. 8 is another form of device for lifting the edge of the fabric.
On a guide bar 9 arranged on the frame of the loom underneath the fabrics
travel a carriage 10 is arranged movable to and fro, which travels on the guide
bar by its rolls 11. This carriage carries the rubbing knife 13 Fig. 3 fastened
in cheeks 12, the top end of the knife which operates on the fabric is turned or
twisted at an angle of about 45° to the length direction of the latter. The car-
riage 10 is moved to and fro as follows;-
-
By a shaft, for instance, the shaft 14 and under the action of bevelled toothed
wheels 15, a crank 16 and driving rod 17, a toothed segment 18 is given a rock-
ing movement, the segment engages with a toothed wheel 20 on a shaft 19. On
the shaft 19 is a pulley 21 which carries a cord, chain or the like 22. The cord
or the like is guided round rollers 23 and is connected at its ends at 24, with the
carriage 10 If therefore the crank 16 is put into rotation by the driving
device 15 and the segment 18 is thereby given a swinging movement, the pul-
ley 21 turns alternately in the forward and in the backward direction so that
the carriage 10 moves to and fro and the knife 13 rubs the fabric 25.
The device for lifting, the edges as shown in Figs. 6 & 7 is arranged as
follows:
-
On the guide bar 9 an angle lever 26 is pivoted at 27 and held in its normal

page_text: position by a spring 28 This angle lever is provided on one face with an ob-
lique surface 29 which is operated on at the entrance of the carriage underneath
the fabric, by a 1oller 30 arranged on the carriage 10 in such a manner that the
roller bears upon the surface from below and in its movement lifts the angle
lever 26. Thereby the arm 31 of the angle lever directed upwards comes under
the edge of the fabric 32 and lifts the same as can be seen in Fig. 1. When the
roller 30 moves away from under the oblique surface the angle lever 26 returns
again into the position shown in Fig. 6, in the outward movement of the car-
riage the roller 30 moves above on the surface 29. The lifting of the fabric edge
can also be effected by the device shown in Fig 8.
A quadrant 33 is pivoted on-the carnage 10 and its are 34 presses under the
fabric. The quadrant is provided with a shoulder 35 which on the outward move-
ment of the carriage moves under a hook 36 swinging on the guide bar 9, but
which at the entrance of the carriage is caught by the hook as shown in Fig. 8
so that the arc 34 lifts the fabric edge 32. When the carriage has moved further
on in the direction shown by the arrow then the quadrant 34 is brought to the
position shown in dotted lines and returned again when arrived at the other
end of the guide bar by a similar hook for the purpose of lifting the other web
edge in a similar manner.
Instead of the rubbing knife being bent to about 45° a knife arranged in the
carriage 10 and movable round its axis can be used.
Naturally the above described arrangement can be mounted and used separate
from a loom.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
"
"
1. A new or improved apparatus for rubbing or spreading the warp and weft
threads of woven fabrics such as silk and half silk fabrics wherein a rubbing
knife 13 is turned at about 45° to the length direction of the fabric and
mounted on a carriage 10, and moved to and fro underneath the fabric by means
of a cord or the like 22
2. The combination with the device mentioned in Claim 1 of an angle lever 26
pivoted on the guide bar of the carriage 10 or a quadrant 33 pivoted on the car-
riage 10 for pressing under the edge of the fabric and lifting it.at the com-
mencement of the inward movement of the carriage.
3 An improved apparatus as in Claim 1 having means for lifting the fabric
edge consisting of an angle lever 26 pivoted on the guide bar 9 and provided with
an oblique surface 29 against which at the inward movement of the carriage 10
a roller 30 arranged on the latter bears, moving the angle lever with its upwardly
directed arm 31 against the fabric edge.
4. A further form of the arrangement described in Claim 1 for lifting the
fabric edge, consisting of a quadrant 33 pivoted on the carriage 10, and having
a shoulder 35 and are 34: and a hook 36 pivoted on the guide bar 9, which bear-
ing upon the shoulder 35, of the quadrant at the inward movement of the car-
riage lifts the fabric edge by means of the arc 34.
Dated this 10th day of February 1899.
HERBERT HADDAN & Co.,
Agents to Applicant,
8, Buckingham Street, Strand, W.C., London.