U.S. patent number 3,644,981 [Application Number 05/020,556] was granted by the patent office on 1972-02-29 for device for facilitating pullup or sliders on slide fastener chains.
Invention is credited to Pertti O. Gustavsson.
United States Patent |
3,644,981 |
Gustavsson |
February 29, 1972 |
DEVICE FOR FACILITATING PULLUP OR SLIDERS ON SLIDE FASTENER
CHAINS
Abstract
Device for facilitating pullup of sliders on slide fastener
chains, in which storage means containing rows of sliders, which
may differ in color or style from each other, are movable in a
direction transverse to the rows to align a selected row of sliders
with gripping means which are movable from a rest position distant
from the storage means to an advanced position for gripping in the
advanced position a slider at the end of the selected row and for
withdrawing the gripped slider from the storage means during return
of said gripping means to the rest position while holding in said
rest position the slider in a position facilitating pull up of the
latter with a slide fastener chain.
Inventors: |
Gustavsson; Pertti O. (Boras,
SW) |
Family
ID: |
5728587 |
Appl.
No.: |
05/020,556 |
Filed: |
March 18, 1970 |
Foreign Application Priority Data
|
|
|
|
|
Mar 19, 1969 [DT] |
|
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P 19 13 873.9 |
|
Current U.S.
Class: |
29/768 |
Current CPC
Class: |
A44B
19/64 (20130101); A44B 19/62 (20130101); Y10T
29/533 (20150115) |
Current International
Class: |
A44B
19/42 (20060101); A44B 19/64 (20060101); A44B
19/62 (20060101); B23p 019/04 () |
Field of
Search: |
;29/27.5SL,207.5,408,27.5ST |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Eager; Thomas H.
Claims
I claim:
1. A device for facilitating pullup of a slider on a slide fastener
chain comprising, in combination, gripping means movable between an
open and a closed position for gripping and holding a slider in a
predetermined position; storage means adapted to hold a plurality
of rows of different sliders with the sliders in each row axially
aligned with each other; guide means for guiding said storage means
for movement in a direction transverse to the longitudinal
direction of said rows to bring a selected row of sliders in
alignment with said gripping means; moving means for moving said
gripping means between a rest position spaced from said storage
means to an advanced position ready to grip a slider at the end of
a selected row; and operating means cooperating with said gripping
means for moving the same between said open and said closed
positions so that said gripping means when moved to said advanced
position may grip a slider at the end of the selected row and hold
the thus gripped slider in a predetermined position while said
gripping means move to said rest position and for then releasing
the slider after the latter has been pulled up on a slide fastener
chain.
2. A device as defined in claim 1, wherein said storage means
comprises a plurality of disposable magazines, one for each row of
sliders, and means for releasably holding said magazines in said
storage means.
3. A device as defined in claim 2, wherein each of said magazines
comprises guide rail means having a pair of elongated spaced and
substantially parallel guide portions adapted to engage into
channels of said sliders to guide the latter in longitudinal
direction, and means at that end of each magazine which faces said
gripping means for releasably holding a slider at said end.
4. A device as defined in claim 1, wherein said storage means
comprises a plurality of elongated substantially parallel guide
rails spaced in transverse direction from each other and having
elongated edge portions adapted to engage into channels of the
sliders so as to guide the sliders freely movable in longitudinal
direction in said plurality of rows, and means for releasably
holding a slider at that end of each row which faces said gripping
means.
5. A device as defined in claim 1, wherein said sliders are
arranged in said rows so that that end of each slider which is
adapted to receive engaged coupling elements of a slider fastener
chain faces said gripping means.
6. A device as defined in claim 1, wherein said gripping means
comprise two jaws at least one of which is movable toward and away
from the other jaw, and wherein each of said jaws has a gripping
face substantially parallel to the gripping face of said other jaw,
and wherein said gripping faces move during movement of said
gripping means between said rest and said advanced positions in the
direction of the selected row of sliders.
7. A device as defined in claim 6, wherein one of said jaws is
stationary and said gripping face thereof is aligned with a side
face of a slider lug of a slider at the end of the selected row,
said one jaw having a stop portion projecting from one end of its
gripping face in a direction transverse thereto toward the gripping
face of said other jaw and being adapted to engage a front edge of
the lug of the gripped slider.
8. A device as defined in claim 7, wherein a releasing tongue
projects intermediate the opposite ends from the gripping face of
the movable jaw toward the gripping face of the stationary jaw,
said releasing tongue being constructed to engage into an opening
of the lug during movement of said gripping means to said closed
position to thereby move a locking tooth connected to said lug out
of the channel of the gripped slider.
9. A device as defined in claim 6, wherein said guide rails are
located in a plane which is inclined in the direction of said rows
at an angle to the horizontal toward said gripping means so that
the sliders at the end of each row facing said gripping means are
at a lower elevation than the other sliders in each row, and
wherein said gripping means during its movement between said
advanced and retracted positions moves in a direction substantially
parallel to said plane.
10. A device as defined in claim 1, and including control means
cooperating with said moving means and said actuating means for
moving said gripping means from said closed to said open position
during movement of said gripping means from said rest to said
advanced position, for moving said gripping means to said closed
position when it reaches said advanced position, and for
maintaining said gripping means in said closed position during its
return to and while in said rest position.
11. A device as defined in claim 10, and including additional
control means for controlling movement of said storage means in
direction transverse to said row of sliders relative to said
gripping means to bring a selected row of sliders in axial
alignment with said gripping means.
Description
BACKGROUND OF THE INVENTION
The invention relates to a device for facilitating pullup of
sliders on slide fastener chains in which the slider is gripped by
the device in the region of the slider lug.
Devices of this type are known in the art in which a slider is
placed by hand from a container between the jaws of a gripping
device, whereafter the jaws are closed to hold the slider in a
predetermined position on the gripping device and while the
operator grips the tapes of a pair of slide fastener stringers
having coupling elements engaged with each other and threads these
stringers into the stationary held slider until the slider is
pulled up to a certain extent on the two stringers. The device
serves only to hold the slider in stationary position during
threading of the two stringers through the channel of the slider so
that the operator may use both hands, as necessary, for this
operation. In using this known device, the operator has to select a
slider and place it by hand between the open jaws of the gripping
device and to subsequently close the jaws, and this operation
necessarily slows down the assembly of sliders and slide fastener
chains. An additional disadvantage of this known device is that the
operator sometimes does not place the slider properly into the
device, so that the slider is not properly held during the assembly
operation.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide for a device
for facilitating pullup of sliders on slide fastener chains which
avoids the above-mentioned disadvantages of such devices known in
the art.
It is a further object of the present invention to provide for a
device of the aforementioned kind which is simple in construction
so as to be produceable at reasonable cost while standing up
properly under extended use and which greatly expedites pullup of
sliders on slide fastener chains.
With these objects in view, the device, according to the present
invention for facilitating pullup of sliders on slide fastener
chains, mainly comprises gripping means movable between an open and
a closed portion for gripping and holding a slider in a
predetermined position, storage means adapted to hold a plurality
of rows of different sliders axially aligned with each other, guide
means for guiding the storage means for movement in a direction
transverse to the longitudinal direction of the rows to bring a
selected row in alignment with the gripping means, moving means for
moving the gripping means between a rest position spaced from the
storage means and an advanced position ready to grip a slider at
the end of a selected row, and operating means cooperating with
said gripping means for moving the same between the open and closed
positions so that the gripping means when moved to the advanced
position may grip a slider at the end of the selected row and hold
the thus gripped slider in a predetermined position while said
gripping means move to said rest position and for then releasing
the slider after the latter has been pulled up on a slide fastener
chain.
The gripping means, according to the present invention, comprise
two jaws at least one of which is movable toward and away from the
other jaw so as to assure a secure gripping and proper holding of a
slider during pullup of the same with a slide fastener chain. The
device, according to the present invention, makes it also possible
to directly pick up a selected slider with the gripping means so
that placing of a slider by hand between the jaws becomes
unnecessary. The selection, pick up and properly holding of a
slider, can therefore be made with one and the same device. Since
during selection of a specific type of slider, a transverse
movement of the storage means relative to the gripping means is
carried out, it is possible to coordinate a great variety of
different slider types with a single gripping means so that a great
variety of sliders differing in type or color, may be in any
desired sequence, assembled with slider fastener chains.
It is also possible to construct the device, according to the
present invention, for fully automatic operation. Thus it is
possible to combine the above-mentioned movements between the
gripping means and the storage means and the movement of the
gripping jaws between open and closed position with each other and
to control these movements from control means which are actuated by
a plurality of actuating buttons, one for each type of slider.
The device according to the present invention therefore includes
preferably also control means which control movement of the
clamping jaws of the gripping means in dependency of the movement
of the gripping means between the rest and the advanced position.
Preferably, the control means control the movement of the clamping
jaws in such a manner that the latter are held in the open position
during movement of the gripping means from the rest to the advanced
position, to close the clamping jaws when the gripping means are in
the advanced position so that the jaws will grip the lug of a
slider at the end of a selected row and to then hold the clamping
jaw in a closed position during return movement of the gripping
means from the advanced to the rest position.
Even though it would be possible to carry out relative movements
between the storage and the gripping means simultaneously, that is
to carry out the movement of the storage means in transverse
direction to the rows of sliders therein simultaneously with the
advance of the gripping means from the rest to the advanced
position, it is preferred, in order to simplify the arrangement, to
carry out these relative movements one after the other and to use
therefore control means which assures the automatic sequence of
these movements, that is to assure first a transverse movement of
the magazine relative to the gripping means to align a selected row
of sliders in longitudinal direction with the gripping means and
then to move the gripping means in longitudinal direction between
the rest and the advanced position toward and away from the end of
the selected row.
In order to simplify the device, it is preferred to move the
gripping means between the rest and the advanced position along a
path extending in the direction of and forming a continuation of
the selected row of axially aligned sliders. This simplifies the
perfect alignment of the gripping faces of the jaws of the gripping
means with the faces of the sliders gripped by the jaws which
extend in the direction of the slider row.
The storage means of the device according to the present invention
is preferably composed of a plurality of exchangeable magazines.
Preferably, releasably holding means are provided on the magazines
for holding the latter in a releasable manner in the storage means.
The releasable holding means preferably comprise cooperating male
and female elements respectively provided on the magazines and the
storage means and interengaging with each other when the magazines
are placed in the storage means. The magazines are preferably
constructed as elements for packing and supporting the sliders
longitudinally aligned with each other. These magazines, after all
sliders are withdrawn therefrom by the gripping means, are removed
from the storage means and discarded, whereafter they are replaced
by new magazines filled with sliders. Such magazines may be in the
form of guide rails of U-shaped cross section made from plastic
material or cardboard in which the sliders are supported axially
aligned with each other, or these magazines may be formed by
elongated strips in which the sliders are arranged aligned in axial
direction with each other. It is also possible to place the sliders
without a separate carrier into the storage means by connecting the
sliders at opposite ends easily separable from each other to form
an elongated rod. This is comparable with staples in which the
individual staples are connected to each other up to the time of
their use by a thin plastic sheath. The jaws of the gripping means
which close with a relatively great force can in this case be used
to separate the slider at the end of the rod from the remainder
thereof.
In order to facilitate gripping of the lug of the slider by the
jaws of the gripping means, it is preferred to guide the sliders on
a pair of guide rails having edge portions engaging in the channels
of the sliders to guide the latter movable in longitudinal
direction. The guide rails are preferably provided at the ends
thereof facing the gripping means with releasable holding means for
releasably holding a slider at that end of the guide rails. Such a
releasable holding means will prevent an undesired movement of the
front slider of the row of sliders out of the guide rails, but
permit movement of the slider when the latter is gripped by the
gripping means and pulled, during movement of the gripping means
from the advanced to the rest position, out of the guide rails.
Such a releasable holding means may be in the form of a leaf spring
or in the form of a deformable projection projecting in the path of
the slider.
The sliders are preferably arranged in the storage means or the
magazines aligned in longitudinal direction with each other and in
such a manner that the end of each slider which is adapted to
receive engaged coupling elements of a slide fastener chain faces
the gripping means.
One of the jaws of the gripping means is preferably stationary, and
the other is movable toward and away from the stationary jaw. The
side face or gripping face of the stationary jaw is preferably
aligned in axial direction with a corresponding side face on the
lug of a slider at the end of the selected row. Preferably, the
stationary jaw has a stop portion projecting from one end of its
gripping face in a direction transverse thereto toward the gripping
face of the other jaw and this stop portion is adapted to engage a
front edge of the lug of the gripped slider. If the slider is a
lock slider provided with a locking tooth for engagement with a
coupling element of the slide fastener chain and in which the
locking tooth is integral with one end of the slider lug, then the
movable jaw is preferably provided with a releasing tongue
projecting intermediate the opposite ends of the gripping face of
the movable jaw towards the gripping face of the stationary jaw,
and this releasing tongue is constructed to engage in an opening of
the lug during movement of the gripping means to the closed
position to thereby move the locking tooth connected to the lug out
of the channel of the gripped slider. This releasing tongue in
combination with the stop portion on the stationary jaw will also
locate the slider in an exact position on the gripping means.
In order to simplify construction of the device, according to the
present invention, it is preferred to arrange the various slider
rows in the storage means parallel to each other and substantially
in a common plane which is inclined with respect to the horizontal
in downward direction toward the gripping means. In this way, the
sliders in the various rows tend to move under the influence of
gravity toward the lower end of each row at which they are gripped
by the gripping means and withdrawn from the storage means. Should
the gravity force not be sufficient to move the sliders toward the
aforementioned end, then it is also possible to arrange a rotating
brush above the sliders in which the brush rotates in such a
direction so as to tend to move the sliders toward the lower end of
each row. Preferably, the gripping means are moved during its
movement between the advanced and the rest position in a plane
which is substantially parallel to the plane in which the row of
sliders are located.
The novel features which are considered as characteristic for the
invention are set forth in particular in the appended claims. The
invention itself, however, both as to its construction, and its
method of operation, together with additional objects and
advantages thereof, will be best understood from the following
description of specific embodiments when read in connection with
the accompanying drawing.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a partial schematic side view of the device according to
the present invention;
FIG. 2 is a top view of the device shown in FIG. 1 viewed in a
direction normal to the plane in which the guide rails of the
storage means are located;
FIG. 3 is a cross section taken to the gripping means per se and
drawn to an enlarged scale;
FIG. 4 is a partial top view of a slide fastener chain with engaged
coupling elements; and
FIG. 5 is an end view of a magazine which may be used in the
apparatus according to the present invention and showing one of the
sliders carried thereby.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The device according to the present invention comprises gripping
means 10 arranged in front of a storage means 11 adapted to store
or support a plurality of rows of sliders of different kind.
The gripping means, best shown in FIG. 3, preferably comprise two
jaws 12 and 13, of which the jaw 12 may be fixedly connected to a
slide 14, whereas the other movable jaw 13 is pivotedly connected
by means of a pivot pin 16 intermediate its ends to slide 14 so as
to be tiltable in direction of the double arrow 15 about the pivot
pin 16 between an open and a closed position. A rod 17 is attached
to the lower end of the movable jaw 13 and the rod 17 forms the
piston rod of a cylinder and piston means 18 carried by the slide
14 and operated for instance by compressed air. If compressed air
or any suitable operating fluid is fed through the conduit 20,
shown in FIG. 1, into the respective end of the cylinder and piston
means 18, the rod 17 is moved in the direction of the arrow 19, to
tilt thereby the movable jaw 13 in the direction of the double
arrow 15 towards the left, as viewed in FIG. 3, to bring thereby
the gripping means from the closed position shown in FIG. 3, to the
open position.
The slide 14 carrying the gripping means 10 is movable with the
latter in the direction of the arrow 55, shown in FIG. 2, and the
slide is guided for movement in this direction between a pair of
guide members 21. Moving means are provided for moving the gripping
means 10 between a rest position spaced to the left, as viewed in
FIGS. 1 and 2, from a storage means 11 and an advanced position in
which the gripping means are located beneath a slider 32 at the end
of a selected row. These moving means may comprise double-acting
cylinder and piston means 23 having a piston rod 26 connected to
the slide by means of a member extending downwardly from the slide
14 between the guide members 21. Conduits 24 and 25, communicating
at opposite ends with the cylinder of the cylinder and piston means
23 serve to feed compressed air or a similar pressure fluid into
and out of the opposite ends of the cylinder to thereby move the
slide 14 and the gripping means 10 carried thereby between the rest
and the advanced position of the latter.
Instead of providing double-acting cylinder and piston means 23, it
is evidently also possible to feed pressure fluid only at one end
of the cylinder so as to cause movement of the piston rod 16 in one
direction, while movement of the piston rod 26 in the opposite
direction occurs under the influence of a coil compression spring
located between the other end of the cylinder and the piston, and
moving the piston in the opposite direction during discharge of the
pressure fluid from the one end of the cylinder. The cylinder and
piston means 18 may also be constructed as a double-acting cylinder
and piston means or as a single-acting cylinder and piston means
which is moved by pressure fluid only in one direction, whereas
movement in the opposite direction occurs under the influence of a
compression spring arranged in the manner as described above. It is
also possible to use instead of cylinder and piston means,
solenoid-operated means for moving the jaws of the gripping means
between the open and the closed position, and the gripping means
between the rest and the advanced position.
The guide members 21 are connected to the frame 27 of the device on
which also the storage means 11 are mounted.
The storage means 11, in the embodiment illustrated, is constructed
to receive five different types of sliders which are respectively
arranged in parallel rows 28, 28', 28"' and 28.sup.IV. In the
illustrated embodiment, the rows are arranged in a common plane 29
which is inclined in the direction of the rows at an angle with
respect to the horizontal, as shown in FIG. 1, so that the ends 30,
30', 30", 30"' and 30.sup.IV, which face the gripping means 10, are
located at a lower elevation than the opposite ends of these rows.
Releasable holding means 31 are provided at the bottom end of each
row so as to prevent the slider 32 at this end of each row to move
in an undesired manner out of the storage means 11 under the
influence of gravity. The releasable holding means 31 may be formed
by tongues cut out and bent downwardly from a leaf spring 34, which
extends transverse over the rows of and in which the tongues are
respectively located in front of the lowermost slider of the
respective row.
Since the construction of the storage means for each row of sliders
is the same, it will be sufficient to describe this construction
for the slider row 28. The sliders 32, 33 of the row 28 are guided
in a longitudinal slot 36 for movement in longitudinal direction.
The longitudinal slot 36 is formed between opposite and spaced
edges of two strips or guide rails 37 and 38 which have a thickness
smaller than the gap 39 between the plate 40 and the slider rails
on the opposite plate 41 of a slider, as shown in FIG. 3. The guide
rails 37 and 38 are arranged to respectively project with edge
portions thereof from opposite sides through the gap 39 into the
slider channels 42 formed in the sliders for guiding the coupling
elements of a slide fastener chain. In FIG. 1, the plate 40 of the
sliders is just visible.
The width of the gap 36 is dimensioned in such a manner so that the
slider wedge 43, which connects the two plates 40 and 41 of the
slider at one end of the latter, may pass easily between the
opposite side edges of the rails 37 and 38. As can be seen from
FIG. 1, the lugs 44 of the sliders and the pull tabs 45 suspended
therein, project freely downwardly from the respective sliders. In
this way, the lug 44 of the slider 32 at the front end of the
selective row may be easily gripped by the gripper means 10 in the
manner as will be described later on in detail. The sliders in the
rows 28-28.sup.IV, differ from each other not with regard to size
or shape, but only with respect to their color. Each row contains
sliders of a different color. The sliders are supplied onto the
guide rails of the different rows either by hand, or by vibrating
hopper means known in the art and not forming part of the present
invention. After selecting a row of sliders of a desired color, the
storage means 11 are moved in direction transverse to the rows
until a row of sliders of a selected color is axially aligned with
the gripping means 10. To guide the storage means 11 for movement
in direction transverse to the rows, a pair of angle members 46 and
47 are fixed to plates 53 which extend downwardly from and support
the guide rails 37 and 38 for the sliders, and these angle members
slidingly engage corresponding angle members 48 and 49, which in
turn are fixed to the plate 27 which forms part of the supporting
frame of the device. Arresting means are provided for releasably
arresting movement of the storage means in transverse direction
whenever one of the slider rows is axially aligned with the
gripping means 10. Such arresting means may comprise a
spring-loaded ball 50 located in a bore formed in the plate 27 and
cooperating with a plurality of cavities formed in the bottom of
the angle member 47 spaced in longitudinal direction of the latter
in such a manner that the ball will snap in one of these cavities
whenever one of the slider rows in the storage means 11 is axially
aligned with the gripping means 10. To move the storage means in
transverse direction, it is evidently necessary to exert a force
big enough to overcome the force of the above-described arresting
means.
The above-described device will operate as follows:
In the rest position of the device, the gripping means 10 are
spaced from the left end, as viewed in FIGS. 1 and 2, of the
storage means 11. Contrary to the showing in FIG. 2, the jaws 12
and 13 of the gripping means 10 are in this rest position in the
closed position in which the gripping faces 51 and 52 of the two
jaws are close to each other so as to be adapted to grip the lug of
a slider tightly therebetween. The gripping face 52 of the
stationary jaw is in this position axially aligned with a side face
of the lug of the front slider in the respective row.
The storage means 11 is then moved in transverse direction, as
indicated by the arrow 54, to align a row of sliders having a
selected color with the gripping means 10. This transverse movement
of the storage means 11 may be carried out by hand, but it is
preferred to automatically control this movement. For this purpose,
a plurality of control buttons, one for each row of sliders, may be
provided which control a moving mechanism of known construction to
move, by pressing the respective button, the storage means 11 in
transverse direction until a selected row of sliders is brought
into alignment with the gripping means 11. Subsequently thereto,
movement of the gripping means is enacted so that the latter will
withdraw the front one of the sliders from the selected row. The
movement of the gripping means may be programmed to occur
simultaneously with the transverse movement of the storage means
11, but it is preferred to separately control the movement of the
gripping means by a separate control button. Upon actuating this
button, the gripping means 10 will start to move towards the
storage means 11. Pressing the last-mentioned control button will
actuate a control device of known construction which may for
instance include means for energizing solenoid-operated valves for
controlling flow of pressure fluid through the conduits 20, 24 and
25 in such a manner that pressure fluid may flow through the
conduit 25 into the cylinder and piston means 23 to one side of the
piston thereof, while pressure fluid is at the same time discharged
through the conduit 24 and pressure fluid flows also through the
conduit 20 into the cylinder and piston means 18 so that while the
gripping means are moved toward the right, as viewed in FIGS. 1 and
2, the movable jaw 13 of the gripping means is moved to an open
position, as shown in FIG. 2. In this position, the gripping means
are moved to the advanced position in the region of the front
slider 32 of the selected row of sliders. In the advanced position
of the gripping means 11, the gripping face 52 of the stationary
jaw of the gripping means is located closely adjacent to one side
face of the lug 44 of the front one of the sliders in the selected
row. The sliders are arranged in the rows in such a manner that
their flat ends adapted to receive engaged coupling elements of a
slide fastener chain face the gripping means 10. In the advanced
position of the gripping means, the stop portion 56 on the
stationary jaw 12 will engage the front edge of the lug 44 of the
respective slider. When the gripping means 10 reaches its advanced
position, the aforementioned control device will cause movement of
the movable jaw 13 to the closed position. For this purpose, a
normally open microswitch may be provided which is closed by
contact with a part of the gripping means when the latter reaches
its advanced position to thereby energize a solenoid-operated valve
controlling flow of pressure fluid into and out of the cylinder and
piston means 18 so that, if the latter includes, as described
above, a coil compression spring for moving the movable jaw 13 to
the closed position, the control device will cause discharge of
pressure fluid from the cylinder and piston means 18 so that the
coil compression spring can move the movable jaw to the closed
position. During such movement, the gripping face 51 of the movable
jaw will tightly engage the opposite face of the lug 44 so that the
latter will now be tightly clamped between the gripping faces 51
and 52. As shown in FIG. 2, a releasing tongue 57 projects
intermediate the opposite ends of the gripping face 51 from the
latter toward the gripping face 52 of the stationary jaw 12. The
releasing tongue 57 is arranged in such a manner so as to penetrate
during movement of the movable jaw 13 to the closed position in an
opening of the lug 44.
This position is best shown in FIG. 3. As also shown in FIG. 3, a
locking tooth 58 is arranged at one end of the lug 44. The lug 44
is pivotably mounted on the slider and a spring, not shown in the
drawing, acts on the lug to normally maintain the locking tooth 58
in a position in which the locking tooth projects through an
opening in the slider plate 40 into the slider channel located
between the plates 40 and 41. During penetration of the releasing
tongue into the opening of the lug 44, the slanted bottom face of
the tongue will cause tilting of the lug about its tilting axis in
a direction to remove the locking tooth 58 at the end of the lug
out of the slider channel 42 so that the locking tooth 58 will not
block passage of interlocking elements of a slide fastener chain
through this channel.
After the lug of the slider 30 in the selected row is thus securely
clamped between the gripping faces 51 and 52, the control device
will cause movement of the gripping means 10 with the gripped
slider tightly held thereon from the advanced back to the rest
position. For this purpose, the control device may include
microswitches cooperating with portions of the movable jaw 13 in
such a manner as to energize, respectively deenergize,
solenoid-operated valves controlling flow of pressure fluid through
the conduits 24 and 25 so that the piston of the cylinder and
piston means 23 is moved to the left, as viewed in FIG. 1, thereby
withdrawing the gripped slider from the storage means 11. When the
front slider 30 is thus withdrawn from the respective row, the
remaining sliders of the row will move under the influence of
gravity downwardly, until the next slider will engage the
releasable stop means 31. If the force of gravity should not be
sufficient to move the remaining sliders of the row forwardly in
the mentioned direction, for instance if the inclination of the
guide rails for the sliders with respect to the horizontal should
be too small, then a rotating brush may be arranged above the
sliders in such a manner that the rotating bristles of the brush
will provide an additional drive for moving the sliders in
direction toward the lower bottom end of the storage means 11.
In the rest position of the gripping means 10 in which the gripping
means are spaced towards the left, as viewed in FIGS. 1 and 2, from
the storage means, the gripped slider is held in the position as
shown in FIG. 3, in which the slider channel 42 is unobstructed so
that a slide fastener chain may be pulled up with the slider.
As shown in FIG. 4, such a slide fastener chain 60 comprises two
slide fastener stringers 61 and 62 which at the facing edges
thereof are respectively provided with coupling elements 63 and 64
which are engaged with each other. The operator then grips with his
two hands respectively the tapes of the stringers 61 and 62
adjacent the end edge 65 of the chain, and inserts the coupling
elements into the slider channel 42 while exerting a forward and at
the same time lateral pull onto the two stringers. The coupling
elements 63 and 64 move through the slider channel towards the
opening wedge 43 at the end of the slider where the coupling
elements become disengaged and move through the then forked slider
channel. In this way, the slider is pulled up on the slide fastener
chain. Subsequently thereto, the above-mentioned cycle is repeated
and the pulled up slider is released from the gripping means while
the next slider is withdrawn again from the storage means and
brought to a position ready to be pulled up with a new slide
fastener chain.
As mentioned before, the storage means 11, as shown in FIGS. 1 and
2, may be modified to contain instead of a plurality of fixed
slider guide rails 37 and 38, a plurality of exchangeable magazines
70, one of which is shown in a front view in FIG. 5. The magazine
70 comprises an elongated carrier member 71, made for instance of
plastic material, and having a substantially C-shaped profile. The
ends 72 and 73 of this profile are located in one plane opposite
and spaced from each other and engaged into the slider channel 42'
of the slider 32' shown in FIG. 5. As shown in FIG. 5, the slider
plate 41' with the slider rails thereon are encompassed by the
profile of the carrier 71, while the slider plate 40' is located
outside the carrier profile.
The carrier 71 is in similar manner as described in connection with
the storage means 11, filled with a row of axially aligned sliders.
While one end of the elongated carrier 71 is closed, the other end,
visible in FIG. 5, is open with the exception of a projection 74.
The projection 74 is formed from the plastic material of the
carrier 71 and projects in front of the end edge of the slider 32'
located at the end of the row of sliders filling the carrier member
71. If a pulling force is exerted in direction of elongation of the
carrier on the slider at the end of the row, the projection 74,
formed from elastically deformable plastic material, will be
deformed so that the front slider may be withdrawn from the
magazine, whereas the next following slider will be held by the
projection 74, which, after withdrawal of the front slider, will
spring back to its original shape. The carrier 71 may have a
rectilinear shape or be curved in such a manner so as not to
obstruct the free movability of the sliders in longitudinal
direction of the carrier.
A storage containing a plurality of rows of sliders may be formed
by arranging a plurality of magazines 70 side by side. Such an
arrangement may include a frame providing walls between adjacent
magazine 70 and for maintaining the magazines in proper position
between the walls of the frame, while facilitating replacement of
empty magazines with new, filled ones, each of the magazines 70 may
be provided on opposite sides thereof with semispherical
projections 75 which may be snapped into complementary
semispherical cavities provided in the separating walls of the
frame. The magazine 70 may be arranged in the frame side by side
and parallel to each other, but on the other hand, it is also
possible to arrange the magazines in radial direction angularly
displaced from each other. In the latter case, a circular movement
of the thus formed storage means would be necessary in order to
bring a selected row of sliders into axial alignment with the
gripping means.
It will be understood that each of the elements described above, or
two or more together, may also find a useful application in other
types of devices facilitating pullup of sliders on slide fastener
chains differing from the types described above.
While the invention has been illustrated and described as embodied
in a device for facilitating pullup of a slider on a slide fastener
chain, it is not intended to be limited to the details shown, since
various modifications and structural changes may be made without
departing in any way from the spirit of the present invention.
Thus, it is also possible to use instead of a substantially rigid
carrier, a flexible carrier for the rows of sliders, as for
instance a flexible strip to which the sliders are connected
axially with each other, and in which the strip is wound up on a
roll. The jaws of the gripping means may also be arranged to engage
not the lug of the slider, but other elements thereof, as for
instance a pull tab of the slider. The latter case will be
especially advantageous when the locking tooth is not connected to
the lug, but to the pull tab 45 which in this case is pivotally
mounted on the upper slider plate.
Without further analysis, the foregoing will so fully reveal the
gist of the present invention that others can, by applying current
knowledge, readily adapt it for various applications without
omitting features that, from the standpoint of prior art, fairly
constitute essential characteristics of the generic or specific
aspects of this invention, and, therefore, such adaptations should
and are intended to be comprehended within the meaning and range of
equivalence of the following claims.
What is claimed as new and desired to be protected by Letters
Patent is set forth in the appended.
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