close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3069733

код для вставки
Dec. 25, 1962
H. PoREPP
3,069,723
sLInING-CLASP FASTENERS
Filed Feb- 5, 1959
4
2 Sheets-gheet l
Dec. 25, 1962
H, PQREPP
'
3,069,723
SLIDING-CLASP FASTENERS
Filed Feb. 5, 1959
2 Sheets-Sheet 2
INVENTOR»
/g//m/S
/f'o/Píß P
United ätates Patent @dice
i.
3,959,723
Patented Dee. 25, 1962
2
rotation. By means of such shaping rollers the method
may be carried out very simply, the shaped fastener thread
even making it possible, in contrast to spiral-thread fas
teners and helical thread fasteners, to interweave the
thread as a warp thread with the textile stringer tape, be
cause the spacing between the teeth tips always remains
3,059,723
SLIDlNG-CLASP EASTENERS
Hans Porepp, Essen- redeney, Germany, assigner to Opti
Holding A.G., Glarus, Switzerland. a Swiss firm
Filed Feb. 5, 1959, Ser. No. 791,398
Claims priority, anpiicatien Germany Feb. 6, 1958
7 Claims. (Cl. 18-10)
the same. On the other hand it is also possible to sew
the thread to a textile string-er tape with a simple sewing
machine or with a double-chain-stitch sewing machine,
The present invention relates to sliding-clasp fasteners
made from molecularly-orientable plastic material and
the sewing stitches being disposed between the teeth of
has for an object an improved fastener of this general
kind.
the thread. Finally, also in contrast to the hitherto known
plastic fasteners, a considerable saving of material is ef
fected because the thread need no longer be displaced
Sliding-clasp fasteners made of molecularly orientable
plastic material, for example a polyamide, polyurethane
or the like, are known and in one particular embodiment 15
spirally or helically but proceeds rectilinearly.
The method according to the invention, apparatus for
thereof a stretched plastic flattened thread is helically
carrying the invention into effect and a sliding-clasp fas
coiled so that two such helical threads with opposite thread
tener made therewith will now be described with ref
direction may be fixed to textile tapes to form the fastener
erence to the accompanying drawing which shows en
elements to be actuated by a slider. According to another
larged views of the individual parts, and in which:
embodiment a stretched plastic thread having a round 20
FIGURE 1 shows a schematic side view of the path of
cross-section is coiled or disposed helically and on the
the plastic thread through the shaping rollers;
median longitudinal line the helical pitches of the thread
FIGURE 2 shows a cross-section through the first pair
are pressed fiat, in such a manner that these places, after
of shaping rollers;
a U-shaped bending of the helices about the median longi
FIGURE 3 shows a cross-section through the second
tudinal line and sewing to a textile Stringer tape, form the 25 pair of shaping rollers with juxtaposed transporting rollers;
coupling parts of two such helices. In both cases the
FIGURE 4 shows a plan view of the transporting
manufacture of the fasteners is relatively complicated,
rollers;
because coiling machines or folding machines must be
- FIGURE 5 shows a partial development of the pe
used which require eccentric or reciprocating movements
riphery of the roller of the first pair of shaping rollers
and therefore are very susceptible to trouble, and more 30 in side View;
over the output from these machines is also seriously lim
FIGURE 6 shows the same partial development in plan;
ited owing to their construction.
FIGURE 7 shows a modified embodiment of the pe
In order to increase substantially the output in manu
riphery of the upper shaping roller of the first pair of
facturing sliding-clasp fasteners made of molecularly
orientable plastic materials of the type mentioned, and 35
also to avoid the use of coiling machines or folding ma
chines, the present invention departs from these known
arrangements by utilizing the knowledge that the plastic
rollers in a developed partial plan view;
’
FIGURE 8 shows the polyamide-thread profile in a
side view after its passage through the first pair of shaping
rollers;
FIGURE 9 shows the final thread profile after its pas
materials in question may, in order to obtain the neces
sage through the second pair of shaping rollers in side
sary high degree of strength, be molecularly oriented, not 40 view;
only by stretching, but also by deformation or pressing.
FIGURES l0 and 11 show partial perspective views of
The invention accordingly consists in a method of
making sliding-clasp fasteners from polyamide threads
or the like in which an unstretched rod or thread of
plastic material having any cross-section, but preferably
a round cross-section, is stretched, in order to obtain a
molecular orientation, by means of a shaping pressure
which is exerted transversely to the direction of the
thread, there being formed, by means of the shaping pres
sure, serially disposed teeth having tips, while between
two different thread profiles; and
FIGURE l2 shows a schematic plan view of a fastener
made according to the invention.
ln order to make `the sliding-clasp fastener according
to the invention one starts from a preferably round poly
amide thread or rod 1 which is unwound from a coil.
The thread may also have a different cross-section but
the round cross-section is the most advantageous, because
it may be lobtained in commerce as an unstretched thread
the teeth there are formed stretched connection pieces,
` in this form. The plastic rod or thread 1 ‘consists of a
this thread being subsequently interwoven with or sewn
molecularly orientable polyamide, polyurethane or the
to a textile Stringer tape.
like. This unstretched plastic rod or thread 1 passes be
Preferably, the round unstretched plastic rod or thread
tween two driven rollers 2 and 3 of a first pair of rollers
is fed through two shaping rollers which form the teeth 55 and these two rollers are oppositely located, with a space
and then, between further shaping rollers, the free ends
therebetween, so that the polyamide thread is stretched
of the teeth are provided with tips and the side turned
to the desired extent through shaping by means of the
away from the teeth is provided with indentations.
By means of this method it is possible to start from un
periphery of the shaping rollers. The periphery of the
upper shaping roller Z is provided with uniformly dis
stretched round commercial-type polyamide threads or 60 tributed teeth 4. These teeth 4, as shown in the develop
the like and to subject these to a shaping pressure in a
ment at the top of FIGURES 5 and 6, are offset at the
front at 4a and at the rear with a parallel offset flank 4b
transverse direction, so that thereby the molecular orienta
so that the teeth are generally Z-shaped in cross-section.
tion and the high degree of strength necessary for the
sliding-clasp fastener are obtained. This pressing into 65 The offset ñanks can be obtained by means of a roller
having two toothed discs disposed next to each other, oneshape is effected by means of shaping rollers so that the
disc being somewhat displaced in peripheral direction
thread may always pass rectilinearly or almost recti
linearly through the rollers. Owing to these rotating
relatively to the other so that, on engagement of these
teeth in the polyamide threads 1, the teeth of the poly
shaping rollers no parts susceptible to trouble are present
amide thread 1 are formed as shown in FIG 4.> It is
and the output may be increased to an unlimitedly high 70 however also possible to give the teeth 4 of the upper
degree in manufacturing the fastener thread, since in prac
tice the rollers may be operated at any desired speed of
roller 2 the shape shown in FIGURE 7, which illustrates
` a development of the periphery of the roller in plan. In
sheaves
il»
the case of this tooth construction the front flank is
provided with a rib-shaped projection 4c and the rear
face with a corresponding rib-shaped recess 4d. It is
periphery and which, `similarly to the offset flanks 4a,
naturally possible to provide, instead of rib-shaped projec
greatly enlarged in perspective in FIGURE l0.
A pair of transporting rollers 15, 16 are juxtaposed
4b (FIGURE 6), are staggered relatively Ito one another.
A fastener thread is then finally produced as is shown
tions, single or plural projections on the two ñanlts of the
teeth. The flank construction of the teeth of the roller 2
with the second pair of rollers 9, 1t) and move perpen
and the flank construction of the teeth of the polyamide
thread 1 thereby obtained has the purpose of ensuring
that two interengaging polyamide threads with the tooth
ing in question cannot become disengaged transversely
These transporting rollers 15, 16 are provided on their
peripheries with teeth 17 and 18 which engage from both
sides between the teeth '7, 14 of the polyamide thread
dicularly to the rollers 9 and 1G about traverse axes.
to the fastener plane as will be explained hereinafter in
further detail.
and serve at the same time as abutments during the shap
6 being disposed opposite the teeth 4 of this upper roller.
1f the polyamide thread is pulled through these two shap
ing rollers, the thread proiile according to FIGURE 8
laterally under the shaping pressure. The transporting
rollers 15 and 1o and the periphery of the shaping roller
ing of the thread by the rollers 9 and 10. The lower side
of these teeth 17 and 18 may in this connection also be
The lower shaping roller 3 Iof the ñrst pair of rollers
rounded according to the arcuate shape 3 of the connec
may be constructed as shown in FIGURE 2 in cross
section, i.e. this roller 3 possesses a smooth periphery 3a 15 tion pieces between the teeth ‘i of the polyamide thread
1. If desired, an adjoining co-axial disc 19 with a flat
and has tw-o rside ñanges 3b which bridge the spacing
periphery is juxtaposed with the toothed transporting
between the rollers 2 and 3 and also overlap at the side,
roller 1‘6, as can be seen from FIGURES 3 and 4. The
at least to some extent, the solid core of the shaping
periphery of this disc 19 is chosen so that grooves 20
roller 2. However, the roller 3 may also advantageously
be profiled on the periphery and for example have the 20 are rolled in one side of the polyamide thread by means
of the disc, the sewing-on thread being insertable in these
profile shown in side view and in plane view in the de
grooves when joining the polyamide thread to a tex
velopments in the lower part of FIGURES 5 and l6. As
tile Stringer tape as will also be hereinafter explained.
shown in lthese ñgures, the roller 3 has projections 5
Moreover the second pair of shaped rollers 9, 10 with
on the periphery 3a and grooves 6 therebetween, the
projections 5 being disposed opposite the tooth gaps 25 the associated transporting rollers 15, 16 are so construct
ed that the material of the polyamide thread cannot escape
between the teeth 4 of the upper roller 2 and the grooves
itl may also be constructed in such a manner that the
is produced, i.e. between the thread teeth 7 with the offset 30 connecting intermediate pieces 8 are reduced in width
relatively to the teeth 7 and have a rounded cross-sec
íiank portions or any other projections on the flanks
are disposed arcuate connection pieces 8, the purpose of
tion.
After passing through the second pair of rollers 9, 10
which will also be explained later.
the thread has the form according to FIGURES 9 and lO
The pre-shaped thread or rod 1 according to FIGURE
8 arrives between a second pair of rollers 9 and 10 (FIG 35 or according to FIGURE ll, or some modified form. In
URES l and 3), which are also disposed opposite one
each case the thread is stretched, by the shaaping pres
sure, to the required extent, so that the molecules are es
another and are parallel to the rollers 2 and 3, if the
polyamide thread is passed rectilinearly through both pairs
sentially oriented, the teeth with the tips 14 being formed
by means of the shaping pressure and the tooth ilanks
of rollers. The periphery of the upper roller 9 is provided
with grooves 11, the surface of which is somewhat larger 40 having gradations 7a on both sides or projections and re
cesses according to FIGURE ll. Between the teeth is
than the external peripheral surface 4e of the teeth 4
disposed the arcuate connection piece 3, which in certain
of the roller 2 of the first pair of rollers. The external
peripheral surface 4e of the roller 2 should moreover
be advantageously constructed in a convex manner, in
order to deñne with lthe cor-operating roller 3 the arcuate
cases may also extend in a rectilinear manner.
form of the connecting intermediate pieces 8. Opposite
textile Stringer tape 21, and then the thread With the tex
tile Stringer tape 21 is fed to a sewing machine, prefer
ably to a double-chain-stitch sewing machine, the lower
thread of which is disposed on the side remote from the
textile Stringer tape. 'I he stitches are made in the tooth
gaps, and the double-chain thread thereby becomes lo
the previously mentioned grooves 11 of the upper roller
9 of the second pair of rollers are disposed projections 12
of the lower roller 10, the height of which is advantage
ously somewhat larger than Vthe height of the projections
5 of the roller 3 of the iirst pair of rollers. Between the
projections 12 there are again provided grooves 13 which
essentially correspond to the grooves 6 of the roller 3.
The pre-shaped polyamide thread 1 is fed to this pair
One side
of this profiled polyamide thread according to FIGURES
l0 or l1 is placed as shown in FIGURE 9, against a
cated in the grooves 2d, as can be seen from FIGURE 12.
It is also possible to use Y-shaped textile Stringer tapes
which enclose and are sewn to the tooth bars in V-shape,
of ro-llers 9 and 10 in such a manner that the surface or
the sewing stitches being again disposed between the teeth
peripheral face of the pre-shaped teeth 7 is exactly central
7. If necessary it is also possible to bring two polyamide
threads having the profiling according to FIGURES l()
in the grooves 11. If Áthis thread passes through the
rollers 9 and 10 the material is displaced by the projec
and ll into interengagernent so that the tips 14 of one
tions 12 of the lower roller 10, and »thereby the grooves
thread engae behind the tips of the other thread, where
11 of the upper roller 9 are filled with material in such 60 upon these two threads are fed together with two stringer
a manner that the teeth 7 are each provided with an outer
mushroom-shaped head 14.
If the polyamide thread
tapes 21 to a double-stitch or double-chain stitch sewing
machine the two needles of which sew each polyamide
thread to the associated textile Stringer tape 21. In this
specific embodiment the upper side and the side of the
polyamide thread remote from the tips 14 are free from
projecting textile threads or sewing threads so that the
is not profiled on the side facing away from the teeth
7 by means of the iirst pair of rollers 2, 3, i.e. if the
lower roller 3 has a smooth proñle, then the projections
12 of the lower roller 10 of the second pair of rollers
form suitable impressions situated below the thread teeth
slider, when moved, is guided exclusively along the poly
amide of the thread which is highly resistant to wear so
7, and the grooves 13 give the arcuate form of the inter
that a chañng of the sewing threads is avoided.
mediate pieces 8, this arcuate form being produced on
If one side of the polyamide thread is not provided
the tooth side by abutments engaging suitably at the side 70
with grooves 20 then it is also possible to sew the thread
between the teeth. It is further possible according to the
to a textile Stringer tape 21 in the usual manner, one
invention, if the tooth flanks of FIGURE 6 of the upper
side of the thread being placed against the textile Stringer
roller 2 of the first pair of rollers are offset, also to make
tape as shown in FIGURE 9, whilst the other, oppositely
the upper roller 9 of the second pair of rollers from two
discs which are each provided with grooves 11 on the 75 disposed side is covered over with a narrow tape in such
5
3,069,723
a manner that it is then possible to effect a sewing with
the needle stitches between the teeth on a conventional
sewing machine. Also in this case the side facing away
from the tips 14 may be exposed whereby, the flange of
a slider may be guided against this back, so that also an
increased resistance to wear is obtained on using the
fastener and the slider.
If the connection pieces 8 of the polyamide threads be
tween the teeth provided with tips are constructed in ar
6
of the tooth lto form the head, and forming a groove in
one side of each tooth while the head is being formed
and the sides of the tooth are being supported.
4. A method according to claim 3, wherein the con
necting rod portions are arcuately formed simultaneously
with initial formation of the teeth.
5. A method according to claim 3, wherein each con
necting rod portion is arcuately shaped simultaneously
with formation of the head on the adjacent tooth and
cuate shape and if necessary are rounded oif in cross 10 formation of the groove in the side of the tooth.
section, as is explained above, then the teeth of two
6. An apparatus for forming a sliding-clasp fastener
from a rod of plastic material, said material being per
threads forming a fastener may move in longitudinal di
rection or the teeth may dilate, if for example a stretching
or contraction of the textile Stringer tapes 21 occurs be
cause of moisture. This ensures that a slider will not be
come locked. Finally it should be mentioned that it is
manently deformable by pressure applied thereto, com
prising a first pair of spaced coplanar roll-ers for engag
rod to form a head at the outer end of each tooth, said
peripheral recesses olfset from the recesses in the one
ing the rod therebetween, one of said rollers having a
series of teeth therein and the other roller having a cir
possible to interweave the proñled polyamide thread ac
cumferential groove for receiving the teeth of said one
cording to the invention directly with a textile Stringer
roller and for supporting the rod while a series of teeth
tape.
with connecting rod portions therebetween are formed
l claim:
20 in one -side of the rod, a second pair of spaced coplanar
1. A method of producing a sliding-clasp fastener
rollers and disposed forwardly thereof aligned with the
member from a rod of plastic material, said material being
first pair of rollers to receive »the rod with formed teeth,
permanently deformable by pressure applied thereto,
one roller of the second pair of rollers having a series
comprising the steps of continuously stamping a series of
of shallow, concave peripheral recesses for forming con
recesses uniformly spaced lengthwise of one side of the 25 vex heads on ends of the teeth of the rod with head
plastic rod to form a series of teeth with connecting rod
parts extending beyond opposite edges of the rod over
portions therebetween, then applying pressure to each
adjacent connecting rod portions, the other roller of the
tooth in turn in a direction transverse to the length of the
Isecond pair thereof having a series of shallow concave
head having end parts extending beyond each tooth at 30 roller of the second pair for shaping the connecting
opposite edges of the tooth lengthwise of the rod, said
rod portions to arcuate form, and a third pair of co
planar rollers disposed perpendicularly to the second
end parts extending over adjacent connecting rod por
pair of rollers, the rollers of the third pair having periph
tions between the teeth, supporting opposite sides of each
eral teeth for engaging between the teeth of the rod to
tooth to prevent spreading thereof while the pressure is
being applied to the end of the tooth to form the head, 35 -advance the same past the second pair of rollers and for
supporting opposite sides of each tooth to prevent the
and forming a groove in one side of each tooth while the
same from spreading while the head is lformed thereon.
head is being formed thereon and while the sides of the
7. An apparatus according to claim 6, further com
tooth are being supported.
prising rod shaping means adjacent to and rotatable with
2. A method according to claim 1, wherein the con
necting rod portions are arcuately formed simultaneously 40 one roller of `the third pair thereof for forming a groove
in one side of each tooth.
with formation of the teeth.
3. A method of producing a sliding-clasp fastener
from a rod of plastic material, said material being perma
References Cited in the file of this patent
nently deformable by pressure applied thereto, compris
UNITED STATES PATENTS
ing the steps of continuously stamping a series of recesses 45
2,262,881
Boenecke ____________ _.- Nov. 18, 1941
uniformly spaced lengthwise of one side of the plastic
rod to form a series of teeth with connecting rod por
tions therebetween, each tooth having portions offset at
opposite sides of the thread so that the teeth are gen
erally Z-shaped in cross~section taken in a plane parallel 50
to the length of the rod, then applying pressure to
each tooth in turn in a direction perpendicular to said
plane 4to lform a head .at the end of each tooth, said
head having end parts extending beyond each tooth at
opposite forward and rear edges thereof lengthwise of 55
2,308,117
2,319,099
2,541,728
2,708,300
2,772,469
2,880,488
Jan.
May
Feb.
May
Dec.
Apr.
12,
11,
13,
17,
4,
7,
1943
1943
1951
1955
1956
1959
2,939,192
Hansen _____________ __ June 7, 1960
2,979,776
Morin ______________ __ Apr. 18, 1961
874,738
1,022,981
307,947
Germany ____________ _- Apr. 27, 1953
Germany ____________ __ Jan. 23, 1958
Switzerland __________ _.. Sept. 1, 1955
FOREIGN PATENTS
the rod, said end parts extending over adjacent connect
ing portions of the rod between the teeth, supporting op
posite sides of each tooth in turn to prevent spreading
thereof while the pressure is being applied to the end
Snyder ______________ __
Abramson et al. ______ __
Wahl _______________ _..
Buttress _____________ __
Staller ______________ __
Macy _______________ __
Документ
Категория
Без категории
Просмотров
0
Размер файла
616 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа