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Патент USA US3076091

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Jan. 29, 1963
E. MULLER
3,076,082
APPARATUS FOR SEVERING THE ROVING COURSES IN LINKING MACHINES
Filed Aug. 1'7, 1960
2 Sheets-Sheet 1
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Jan. 29, 1963
E. MULLER
.
3,076,032
APPARATUS FOR SEVERING THE ROVING COURSES IN LINKING MACHINES
Filed Aug. 17, 1960
2 Sheets-Sheet 2
FIG. 3
FIG. 4
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68/1420 MiiLLEe
By M,
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47700493‘
United Sttes
mitt
ice
3,076,082
Patented Jan. 29, 1963
1
2
3,076,082
plying such a severing means in a suitable manner, the
advantage will be attained that a clean and ?at seam will
Erhard Miiller, Kernpten, Allgau, Germany, assignor to
which are not in proper mesh formation and are linked
with a so-called two-needle machine as described in my
APPARATUS FOR SEVERING THE ROWING
COURSES IN LINKING MACHINES
Xaver Fendt & (10., Maschinen- und Schlepperfabrik,
Marktoberdorf, Allgau, Germany
Filed Aug. 17, 1960, Ser. No. 50,102
Claims priority, application Germany Oct. 23, 1959
8 Claims. (Cl. 219-19)
The present invention relates to an apparatus for sever
be formed even when linking wild-transferred stockings
copending application Serial No. 50,221, ?led August
17, 1960. This is due to the fact that the open ends of
the severed meshes will now be shortened and slightly
welded to each other so that by the linking operation a
clean and proper seam will be attained, even though the
severed meshes have not been previously brushed out.
The brushing apparatus may therefore be omitted.
ing the roving courses in linking machines, especially cir
cular linking machines for linking fabric pieces consisting
As already indicated, the severing device according to
of synthetic ?bers.
the invention is especially suitable for use in a two-needle
In linking machines of this type in which the section 15 machine which permits a wild transferring since in such
ring progresses continuously and in which the sewing
a machine not every mesh of a row of meshes of a stock
ing will be transferred to a section needle. Thus, when
cutting off the roving courses at a point directly above the
transfer course by means of the conventional cutting
apparatus, there will be the danger that a mesh which
has not been caught by a section needle may run before
be caught by the sewing needle. Accordingly, when
the linking seam can be formed which holds all of the
link a stocking in the conventional manner, the same is
meshes. For this reason it has previously been necessary
transferred to the needles of the section ring in the proper
to cut the roving courses at a point higher from the trans
mesh formation and in such a manner that a few roving
courses will lie above the transfer course. This transfer 25 fer course. However, this rendered a clean brushing of
the cut meshes impossible so that in the end effect a
ring requires trained operators and such accurate work
bulgy, unclean seam resulted which for certain purposes
ing that within a certain time only a certain number of
had to be rejected. The cutting wire according to the
meshers may be transferred, vPrior to the actual linking
invention is, however, adjusted to such a level relative
operation, these roving courses are cut oif at a point
directly above the transfer course in order to attain a 30 to the section ring that it will already cut the meshes of
the first roving course of the stocking which is being fed
flat seam. For this purpose, each conventional linking
thereto by the continuous movement of the section ring
machine is operatively associated with a cutting and
needle ‘co-operates with a looper or with a looper and a
stitcher in order to produce the looping, the work can be
carried out properly only if the material is transferred in
proper mesh formation so that in linking each mesh will
The device according to the present invention there
fore permits the roving courses also of Wildly transferred
ing out the half sections of the cut meshes which are being 35 pieces of material to be cut immediately above the trans
brushing apparatus which is mechanically driven. The
brushing apparatus is provided for the purpose of brush
the meshes would otherwise project from the linking seam
fer course since the simultaneous welding effect upon the
open ends of the meshes prevents a running of a mesh
and would then form an improper seam.
prior to the linking operation. Obviously, however, the
held within the transfer course since the open ends of
The cutting and brushing apparatus together with the
electric welding device can be applied only to materials
necessary means for driving the same form a rather 40 which consist of synthetic ?bers, for example, in the
large unit which limits the accessibility to the section ring.
production of sheer stockings of synthetic polyamide
?bers on a caprolactam base, such a perlon, or of socks
The cutting blade and brush of this unit are also sub~
of Helanca.
jected to considerable wear. Furthermore, it is still
rather difficult to clean the brush continuously so as to
The voltage or amperage required for the operation of
insure that the cut meshes will be properly brushed out. 45 the electric severing apparatus should be regulated so as
It is an object of the present invention to overcome
to produce the necessary heat for cutting the meshes in
the mentioned difficulties and to provide for this purpose
accordance with the particular material of the stockings
‘an apparatus which includes a severing element in the
and the desired cutting speed. It is especially advisable
form of a wire or the like through which an electric cur
to mount the wire exchangeably on supporting means
50 which are ?xed to the linking machine and in a manner
rent is conducted so as to heat the wire.
It is already known in special-purpose sewing machines
so as to extend above and parallel to the upper ends of
to provide severing means which are adapted to sever
the section needles. The wire may be clamped between
two supporting means. It is also advisable to design the
the upper and lower threads by passing each thread
through an incandescent ?lament or wire which is dis
supporting means of the wire so as to permit the distance
posed around the threads so that, when the threads are 55 thereof from the plane of the section needles to be ad
to be severed, each incandescent wire is moved by special
justable. In order to insure that the roving courses will
control means in a direction transverse to the length of
be straightened out before they are severed by the heated
the respective thread so as to touch the thread and thus
wire, it is advisable to provide the supporting means of
to sever the same. These thread severing means there
the wire with guide plates which terminate in front of
fore require special control means for moving the threads. 60 the heatable wire, and to provide a further curved guide
It is also already known simultaneously to sew and
plate behind the wire and substantially at the level of
weld together two pieces of material by providing at the
the heatable wire for guiding the severed meshes to the
pressure foot of a sewing machine a heated point, plate,
outside. Although it is functionally not required, it is
or wire which is adapted to come in contact with the
also advisable for the greater safety of the operator to
65
cloth pieces as soon as the pressure foot arrives at its
operate the severing apparatus with a low voltage by
lowest position. The ends of the sewed cloth pieces may
then be cut at the same time.
It is a further object of the invention to utilize a sever
ing means of the general type as previously described,
for example, a wire through which an electric current is 70
conducted, for the purpose of severing the roving courses
on a linking machine. It has been found that, when ap
connecting the circuit passing through the heating wire
to a transformer which may be adjusted at .its low-tension
side to the required voltage or amperage.
These objects, features, and advantages of the present
invention will become further apparent from the follow
ing detailed description of a speci?c embodiment thereof
3,076,082
3
4
which is illustrated in the accompanying drawings, in
whichFIGURE 1
of the cutting
application to
‘FIGURE 2
URE 1,
4. A linking machine as de?ned in claim 2, further
comprising guide plates mounted on said supporting
shows an elevation, partly in cross section,
apparatus according to the invention in its
a circular linking machine,
shows a top plan view of a part of FIG
plates terminating in front of said wire, and ‘another
curved guide plate behind said wire for guiding the sev
ered meshes to the outside, said curved guide plate having
FIGURE 3 is a side elevational view of a circular
a surface portion facing toward said wire and disposed
at a level substantially equal to the level at which said
linking machine in accordance with the present invention
and its conventional support, and
FIGURE 4 is a top plan view of FIGURE 3.
Referring now to the drawing wherein like reference
numerals are used throughout the various views to desig
means for straightening up the roving courses, said guide
wire is located.
'5. A linking machine as de?ned in claim 1, in which
said current supply means comprise a transformer
mounted on the linking machine.
6. A linking machine for linking fabric pieces consist
ing of synethetic ?bers, comprising a movable section
and 4, reference numeral 14 designates therein the driv 15 ring for supporting said fabric pieces, section needles on
ing motor for the movable parts of the circular linking
said ring, means for linking said fabric pieces on said
nate like parts, and more particularly to FIGURES 3
machine in accordance with the present invention. Refer
ring, and means for severing the roving courses of said
ence numeral 15 designates the machine housing resting
‘fabric pieces at a point above said needles and simultane
on a pedestal or upright 17. The pedestal 17 is provided
ously welding the open ends of the meshes of said roving
with shifting control 18, for example, a foot switch of 20 courses to prevent running thereof, said last-mentioned
conventional construction which controls the operation
means comprising ‘a wire arranged in front of said link
of the circular linking machine. The section link cup 16
ing means and above said section needles, means sup
of the circular linking machine having section needles 19
porting said wire on said machine including means for
may be of the type disclosed in my co-pending application
adjusting the position of said wire with respect to said
Serial No, 50,221, ?led August 17, 1960, and entitled 25 section needles, and means for sup-plying and conducting
“Circular Linking Machine.”
an electric current through said wire for heating the same,
A cutting wire 1 (FIGURE 1) of a thickness in ac
said section ring conducting said fabric pieces through
cordance with its particular purpose is removably se
said severing means in the movement thereof.
cured, for example, by screws, to two contact rods 2
7. A linking machine as de?ned in claim 6, further in—
and 3 which are connected by a cable 4 to a transformer 30 cluding guide mean-s for straightening up said roving
5. Contact rods 2 and 3 are mounted in a cartridge 6
courses, said guide means terminating in front of said
which may be ?tted into a contact socket 7, for example,
‘wire, and means for removing the severed meshes to the
by a bayonet lock. Socket 7 is adjustable in a vertical
outside of said ring.
direction on a bracket 8 of a circular linking machine
8. A linking machine for linking fabric pieces con
which also has a pair of guide plates 1t? mounted thereon 35 sisting of synthetic ?bers, comprising a circular mov
behind wire 1 which terminate into a tunnellike double
able section ring, section needles on said ring, said fabric
rail 11 which extends to the point 9 where the linking
pieces being supported on said ring, means for linking
operation is carried out. Guide plates 10 prevent the
said fabric pieces on said ring, and means for severing
fabric pieces from turning down above the section and
the roving courses of said fabric pieces at a point above
they insure that the roving courses will be accurately cut 40 said needles and simultaneously Welding the open ends of
off at the desired level so that they can thereafter be
the meshes of said roving courses to prevent running
guided to the outside by a further curved guide plate 12.
thereof, said severing means including a wire arnanged
In order to be able to observe whether or not the cutting
in front of and above said section needles and essentially
wire 1 functions properly, a pilot lamp i3 may also be
parallel to the outer ends of said section needles, means
provided in the circuit.
1, 45 supponting said wire on said machine including means .
Although my invention has been illustrated and de
for adjusting the position of said wire with respect to
scribed with reference to the preferred embodiment there
said section needles, means for supplying ‘and conduct
of, I wish to have it understood that it is in no way lim
ing an electric current through said wire for heating the
ited to the details of such embodiment, but is capable of
same, ‘guide means for straightening up the roving counses
numerous modi?cations within the scope of the appended 50 of said fabric pieces including a pair of guide plates ar
claims.
ranged in front of said wire, said guide plates terminating
Having thus fully disclosed my invention, what I claim
adjacent said wire, and another curved guide plate be
is:
hind said wire for ‘guiding the severed meshes to the out
{1. In a linking machine for linking fabric pieces con
side of said section ring, said curved ‘guide plate having
sisting of synthetic ?bers having a section ring for hold 55 a surface portion facing toward said wire and disposed
ing said fabric pieces, section needles mounted on said
at a level substantially equal to the level at which said
ring, and means for linking said fabric pieces, the im~
wire is located, said fabric pieces being conducted through
provement comprising an apparatus for severing the rov
said severing means by said section ring in the move
ing courses of said fabric pieces to be linked ‘on said ma
chine prior to the linking thereof, comprising a wire, said 60
wire being supported above and adjacent to said needles
and means for supplying and conducting an electric cur~
rent through said wire for heating the same.
2. A linking machine as de?ned in claim 1, further
comprising means mounted on the linking machine for
exchangeably supporting said wire above and essentially
parallel to the upper ends of the section needles of the
machine.
3. A linking machine as de?ned in claim 2, wherein
said means for supporting said wire includes means for
adjusting the distance between the Wire and said section
needles.
ment thereof.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,101,912
2,438,156
Myer _______________ __ Dec. 14, 1937
Dodge ______________ __ Mar. 23, 1948
2,677,747
2,894,106
Jaye ________________ __ May 4, 1957
Jacob‘ et a1. __________ __ July 7, 1959
548,727
Italy ________________ __ Sept. 29, 1956
FOREIGN PATENTS
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