Note: Descriptions are shown in the official language in which they were submitted.
~o~030
This invention relates to a method for manufacturing
a decorative piece of textile, in which a flat coil form having
an opening is provided with a thread winding so that the
opening is covered at least in part, and in which the thread
winding is sewn with the help of a sewing machine in the
proximity of the opening and the sewn thread winding is removed
from the flat coil form.
It is a known practice in the manufacture of a
decorative piece of textile, for instance a wall hanging or a
pillow cover, to provido a flat basic piece of textile with
colored decorative stitching with a sewing machine. On a
piece of textile, the thread sections forming the decorative
stitching then lie tight against the base piece of textile.
It is further a known practice to apply a one-layer
thread winding on a two-pronged fork, to sew the winding
between the fork prongs on a base piece of textile and to
then withdraw the fork from the winding. By repeating this
process, a piece of textile may be obtained, on which a flat
base piece of textile is covered with parallel straight rows
of closed thread loops arranged in the form of an "8".
To obtain straight lines of loops, a fork is used
in the aforementioned method, in which the width of inter-
space between the prongs of the fork is only slightly greater
than the diameter of the sewing needle. The latter may,
at the same time, be used as a guide.
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~7~030
This method presents, however, the disadvantage that
the stitching with which the thread loops are sewn down are
very conspicuous and yive an unesthetic effect. Moreover,
there exists in the aforementioned process, a considerable
danger of breakage of the needle during sewing.
As the basis of the invention there is, now, the prob-
lem of creating a method for producing with a sewing machine,
by sewing on a thread winding, a decorative piece of textile
with at least one row of short thread sections. The latter
should be tufted enough that the stitching is no longer conspic-
uous.
The problem of the aforementioned kind, is solved bya method according to this invention, by the fact that the
thread winding is cut open after sewing on both sides of the
flat coil form.
The invention further includes an attachment for a
sewing machine for carrying out the process with a pressure foot
and a flat coil form for carrying a thread winding, provided with
an opening. The attachment is characterized by the fact,
2 according to a preferred embodiment of the invention, that the
pressure foot is equipped with a pressu~e pad and that the
opening is a slit with two at least approximately parallel long-
itudinal borders, with the width of the slit being such that the
pressure foot pad extends into the slit in sewing position and
provides a guide for the flat coil form.
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~07~30
The invention further includes a piece of textile
manufactured according to the process. The piece of textile is
characterized, according to the invention, by at least one row
oE thread sections sewn together in their miadle zone and
p~eesenting loose ends on both sides.
According to the present invention there is provided a
method of producing a decorative textile without fabric base
support comprising; winding a flat coil form having an open
slot with thread such that the open slot is at least partially
covered with the thread windings the free thread end wound at
least once perpendicular to the thread windings forming longit-
udinal windings, stitching the thread windings through the
longitudinal windings on a sewing machine through the slot,
cutting the thread windings on both sides of the coil form, and
removing the decorative textile from the coil form the thread
windings having been sewn together and the opposing loops
formed thereby cut exposing loose thread ends.
The invention will now be described on the basis of
preferred embodiments represented in the drawings wherein:
FIG. 1 shows, in dismantled state, parts of an attach-
ment for a sewing machine in accordance with one embodiment of
this invention;
FIG. 2 is a perspective view of the attachment repres-
ented in FIG.l in assembled state on a sewing machine;
FIG. 3 is a perspective view of a flat coil form with
a thread winding.
FIG. 4 is a perspective view of the attachment of this
invention on a sewing machine sewing the thread winding;
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FIG. 5 is a section cut through a piece of textile with
a decoration according to this invention; and
FIGS. 6-9 are other shapes of flat coil forms according
to this invention.
In PIG. 1, 1 designates a U-shaped, somewhat elastically
flexible bow with two parallel arms la, the ends of which are
connected by bridge lb, and the other ends lc are free. The
external edges of ~he two arms are ld. Connecting element 2 has
a flat middle section 2a and opposite end sections 2b bent towards
each other defining, together with the middle section 2a, two
flat openings 2c. In FIG. 1, there is further shown pressure foot
3. It is equipped with a pressure pad 3a with a free end 3b
turned upwards. Pressure pad 3a is provided with bored hole 3c
for the needle. Bow 1, the connecting element 2 and pressure
foot 3 form the elements of the attachment for a sewing machine.
In FIG. 2 some parts of a sewing machine 4 are represented
schematically. The table intended to bear the textiles to be
sewn is represented by 5 and 6 represents the housing part in
which needle bar 7 and the textile pressure bar 8 operate.
Furthermore, there is a lever 9 for elevating and lowering the
textile pressure bar 8. At the end of textile pressure bar,
pressure foot 3 is fixed with screw 10 for detaching. The needle
bar 7 holds needle 11. As may be seen from FIG. 2, the connecting
element 2 may be slid over the free end sections lc of the arms
la of the bow 1. The connecting element 2 then connects the end
sections lc together in a detachable manner, providing stabiliza-
tion of bow 1. Bow 1 and the connecting element 2 now form
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together flat coil form 12 with an opening in the form of a
slot 13 with two parallel longitudinal edges 13a.
The length and width of the slot 13 are at least of the
same length and width of the pressure pad 3a of the pressure
foot 3. The slot is preferably somewhat wider than the pressure
pad 3a of the pressure foot 3, so that the pressure pad 3a in
sewing position provides a guide for the flat wound coil form 12
with some play to it.
In the following, it is now explained how decorative
pieces of textile may be produced with the sewing machine 4
and the attachment of this invention.
First, the pressure foot 3 is attached to the textile
pressure rod 8 and the connecting element 2 is pushed onto bow 1
in the manner already described whereby the flat coil form is
formed. On the flat coil form 12 thread 14 is now wound with a
wlnding action as represented in FIG.3 so that a dense thread
winding 15 preferably of several layers is provided, covering
the slot 13 at least partly,with the thread loops forming thread
winding 15 and running at about a right angle to the longit-
udinal direction of the arms la and the slot 13. Any loosewindings 15a are pushed tightly side by side or overlapping at
the end of the winding process, and the free thread ends are
pushed under the thread winding 15 or otherwise fastened.
As shown in FIG. 4, a flat base piece of textile 16
is laid on the table 5 of the sewing machine and the flat coil
form 12 with the thread winding 15 is placed on the base piece
of textile. Then the base piece of textile 16 and the flat
coil form 12 are positioned under pressure foot 3 and the latter
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1071030
is lowered so that its pressure pad 3a enters the slit 13 or is
at least extended into it and presses at least a part of the thread
winding 15 against the base piece of textile 16. As already
mentioned, there should be some space between the longitudinal
edges 13a of the slot 13 and the pressure pad 3a so that the
section of thread winding lS, on which the pressure pad 3a lies,
may be pressed into the slot 13. Now the sewing machine is
started and the thread winding 15 sewn on the flat base piece of
textile 16 in the manner shown in FIG. 4 with a thread 18, thus
forming the stitching 19. The base piece of textile 16 and the
flat coil form 12 with the thread winding 15 are pushed together
along the pressure pad 3a of the pressure foot 3, the latter
guiding the flat coil form 12. When the thread winding 15 is
sewn along its entire length, the base piece of textile 16 may be
removed together with the flat coil form 12 from the area of the
pressure foot 3. Then the connecting element 2 is again removed
from the arms la and thereby separated from the arms la and from
loop 1. Then the thread winding 15 is cut open with a knife along
the two outer edges ld of both loop arms la. Then bow 1 is
removed.
With this method the decorative piece of textile 17
represented in FIG~ 5 may be produced, comprising a flat base
piece of textile 16 and a decoration formed by at least one row
of thread sections 20. These are sewn together in their middle
and fastened by stitching 19 on the base piece of textile 16.
The free ends 20a of the thread sections 20 stand out loosely from
the base piece of textile 16. The thread sections 20 now form a
dense tufted row, so that the stitching 19 is completely covered
and concealed.
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1071030
It is apparent that the method and the attachment may
be modified. For instance, the flat roil form 12 may comprise,
instead of a loop and a connecting element, of a one-piece,
frame-shaped small plate.
In many cases it is desired to use the decorative
piece without the fabric base support. This can be produced in
the above described manner without using the base piece of textile
16. The resulting stringy structure tends to twist and turn.
Experiments have shown that this undesirable behaviour can be
avoided if the free thread ends 14 are wound at least once at
right angles to the thread winding 15, parallel to the longitu-
dinal edges and the whole thing sewn through these longitudinal
windings. The different tensions of the winding 15 are partially
compensated by the transverse supplementary windings. If
several threads are used simultaneously for the windings 15, the
best results have been obtained when the thread ends 14 are
twisted together before the thread ends are wound transversly and
sewn as described.
The flat coil form 12 may also be curved in the form of
a sickle or other shape, so that curved rows of thread sections
can also be formed. By this method, for instance, decorations
with rosette or flower patterns may be formed. The slot of the
flat coil form would then have to be curved correspondingly,
with its edges running at least approximately parallel to one
another, to provide a guide. If a pressure foot with a straight
pressure pad is used, a fair free space should exist between
the pressure pad protruding into the slot and the edges of the
slot, so that the flat coil form 12 may be moved along a curve.
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It is, however, also possible to use a pressure foot the pressure
pad of which is curved in the support plane corresponding to the
curve of the slot. For the smaller, curved coil forms, as shown
in FIGS. 6-9 in approximate actual size, it is no longer possible
to make the width of the slot wide enough so that the pressure
foot can be guided along the edge of the slot. This is not
necessary with such short distances. It is only important to
approximately anticipate the path of the slot. This is no problem,
when the beginning and the end of the slot are visible. In
addition, the coil forms in FIGS. 6-9 are so shaped that the area
on which the thread can be wound is smaller than the length of the
slot. In FIG. 6, the winding area is defined by the form. The
flat coil forms in FIGS. 7 - 9 have projections before the ends
of the slots which accurately define the thread-winding areas and
keep the slot from being completely covered over.
By the method of this invention, quite a number of
decorations may be produced. Naturally, not only the forms may
vary, but multi-colored threads may be used. Furthermore, it
is possible to use single or multi-strand threads.
While in the foregoing specification this invention
has been described in relation to certain preferred embodiments
thereof, and many details have been set forth for purpose of
illustration, it will be apparent to those skilled in the art
that the invention is susceptible to additional embodiments and
that certain of the details described herein can be varied
considerably without departing from the basic principles of the
invention.
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