close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3094964

код для вставки
June 25, 1963
s. l. BURD ETAL
3,094,954
LOOPING MACHINE
Filed Feb. 12. 1960
FIG2
FIG6
?
SAMUEL l. BU RD
‘ JOHN G. LORD
INVENTORS
'
Unite States
1.
3,094,954
LOOPING'MACHINE
Samuel I. Burd, New York, N.Y., and John G. Lord,
Swarthmore, Pa., assignors to Prestige, Inc., New York,
N.Y.,- a corporation of Pennsylvania
Filed Feb. 12, 1960, Ser. No. 8,374
7 Claims. (Cl. 112-27)
This invention relates to‘ a looping machine of the type
shown in United States Patent No. 2,828,707 issued to
Ivéster‘ on‘ April 1, 1958 and inrUnited States Patent No.
vi
‘4
..
ice
3,094,954
Patented June 25, 1963
2
two pieces of fabric impaled on the same point. As
stated,- this calls for av very high degree of- skill and be
cause it is time consuming, the looping dial can only be
rotated at a speed which is a function of the speed at
which» the stitches to be looped can be impaled on- the
peripheral supporting points of the dial.
According to the present invention, the dial is‘ pro
vided with’ a ring gear 16 which is engaged by a pinion
18 on shaft 20 which is driven ‘by any suitable gear train
22 which, in turn, is actuated by the shaft 24 of a prime
mover, not shown, which also reciprocates looping needle
14 synchronously with the rotation of the dial. Since
2,871,806 issued to Bley, on February 3, 1959.
the manner in which this is done is old in the art and is
Conventional looping machines of this type are used
not claimed, per se, as part of this invention, it is not
for closing the toe opening of a seamless stocking, for
looping the edge of a knit fabric, or ‘for joining the edges 15 shown nor described.
Instead of the uniformly projecting supporting points
of two‘ pieces of fabric, etc.
of the conventional looping dial, we provide the dial
As is well known in the art, and as will be seen from
with points 26 which project radially outwardly of the
the patents above mentioned, a looping machine includes
dial to a predetermined extent and with points 28 which
a rotary dial having peripheral fabric supporting points
?ll the spaces between points 26 and which extend ra
20
on which all of the stitches to be looped must be serially
impaled, a cutter ‘for removing the fabric above the loop
ing line, a needle for looping the stitches, and a chain
cutter for severing the sewing yarn. In order to prevent
laddering of a knit fabric, or other defects, it is neces
dially outwardly to a lesser extent than points 26, as best
shown in FIG. 1. It is to be understood that, except for
their different lengths, or the different extents to which
they project beyond the periphery of the dial, points 26
sary that all of the stitches be serially impaled on said 25 and 28 are identical and may be conventional in that
they co-act with looping needle 14 in the conventional
supporting points. This is so xdif?cult and time consum
manner. It will be noted that points 26 are arranged in
ing that it takes several months of training to attain aver
end groups A and B each of which preferably consists
age pro?ciency to insure moderately pro?table operation.
of from two to four points and intermediate groups C,
In fact, the looping operation is responsible for a substan
each
of which preferably consists of one or two points.
30
tial ‘fraction of the cost of manufacture of looped articles
The
number
of points in any group is optional in the
and impaling the stitches Ion the supporting points of
sense that, within reasonable limits, the number of points
the dial represents a major portion of the cost of the loop
may be varied and the same is true of the number of
ing operation.
groups C which will vary with the lengths of the courses
The object of this invention is to reduce the time and
skill required for irnpaling the stitches to be looped on 35 to be looped. It is, however, of the essence of this in
vention that the number of points 26 be always a minor
the supporting points of the sewing dial.
fraction of the number of stitches in a course to be looped.
A further object is to accomplish the desired result in
For example, if the length of the course of fabric to be
expensively and with minimum modi?cation of conven
looped consists of one hundred stitches, the number of
tional looping machines.
These and other objects are attained by the invention 40 points 26 should be less than ?fty, and, preferably, they
should be in the neighborhood of twenty-?ve. In other
as set forth in the following speci?cation and as illus
words, the number of points 26, which are the only points
trated in the accompanying drawing in which:
on which the stitches are impaled manually, should be
VFI‘G. 1 is a diagrammatic top plan view of a sewing
such as to save at least one half of the time which would
dial embodying the invention.
be
required to impale all of the stitches, one by one, on an
45
1FIG. 2 is an elevational view looking in the direction
equal number of points so as to permit rotation of the
of line 2—-2 on FIG. 1.
dial at double the speed and thus double the production.
FIG. 3 is an enlarged fragmentary sectional View look
ing in the direction of line 5‘—5 on FIG. 1.
In practicing the invention, the operator impales the
FIG. 4 is an enlarged perspective view showing details
of construction.
endmost four stitches B’ of the fabric on points 26 of
group B and, while the dial is rotating in the direction
of loading points on which the fabric to be looped is ?rst
in a formation which corresponds to the formation of
groups A, C and B of points 26.
In FIG. 1 there is shown a stocking S—1 in the process
of the arrow, the operator successively impales stitch
FIG. 5‘ is a fragmentary elevational view of a stocking
groups C’ on point groups C and ?nally, the endmost
or other fabric provided with markings which guide the
stitches A’ are impaled on point group A.
operator in impaling the stitches on the points of the loop
It will be noted that the looping line may be marked
ing" dial.
by
the introduction of an auxiliary yarn which forms a
55
FIG. 6 is a reduced, highly diagrammatic illustration
continuous marker, or by marks 27 which are arranged
of the upper portion of a stocking illustrating the location
impaled.
_
_
,
~
'
Except for being modi?ed, as hereinafter set forth, the
looping machine illustrated is conventional in that it in 60 of being hung on points 26; two stockings 8-2 which
have been fully hung on points 26, and a stocking 5-3
cludes a sewing dial 10, a cutter 12 for severing the
in the process of being hung on points 28 prior to passing
fabric above the looping line, a looping needle 14 and
cutter 12‘.
a chain cutter, not shown. A conventional looping dial
In order to impale the remaining stitches of a stocking
is provided with peripheral supporting points which are
of uniform length, or which extend uniformly radially 65 in the position of stockings S~2 on a corresponding number
of intermediate points 28, the machine is provided with a
of the dial and on which the stitches to be looped are
pusher which includes a vertical blade 30 adapted to enter
serially impaled by hand. This means that, if the course
between the points and a horizontal plate 32 which engages
of fabric to be looped, or to be joined to another course,
i
' has 150 stitches, all of said stitches must be impaled, in
and pushes the margin of fabric M above the looping line
In ‘closing the toe opening 70 inwardly of the dial, as shown in FIGS. 1, 3 and 4. The
pusher is carried by one end 34 of a bell crank lever,
vof seamless stockings the stitches of two pieces of fabric
the other end 36 of which is pivoted at 38 to the dial.
have to be impaled with the corresponding stitches of the
' serial order, on 150 points.
3,094,954
4
End 34 of the bell crank lever is pivoted, at 40, to a rod
42 which is reciprocated by crank 44 on shaft 24. It will
the outermost or end stitches of the points calculated
to receive a course a distance slightly greater than the
be noted that blade 30 is so oriented as to be in alignment
with the spaces between successive points so as to push
length of the course, measured when the course is ?at and
the yarn de?ning the stitches easily and accurately be
tween the points and thus impale the stitches formed by
are spaced from each other in like manner. For example,
the distance between the endmost points of groups A and
said yarn on the points.
It will be understood that the reciprocation of blade 30
. one end stitch of a course is impaled on the endmost stitch
relaxed. Also the intermediate groups of long points C
B is greater than the length of the course so that when
is synchronized with the rotation of the dial so that the
of group A and the opposite end stitch of the course is
blade will enter the spaces between each pair of points 10 impaled on the endmost stitch of group B, all the inter
without missing any of them. The action of blade 30,
mediate stitches of the course will be somewhat stretched.
combined with the engagement of plate 32 with the mar
This e?’ect is increased when intermediate stitches of the
gin M of the fabric, above the supporting points, insures ' ‘ course are impaled on the spaced pairs of points of group
complete impalement on points 28 of all of the stitches
C. Stretching the stitches of the course insures the im
which are not impaled on points 26 and pushes the stitches 15 palement of stitches on corresponding points, even though
impaled on the outer portions of points 26 inwardly of
the stitches may not be in dead center registration with
said points or into alignment with the stitches on points
said points. Also, stretching of the fabric as a whole
28, as shown at P in FIG. 1.
and the impalement of intermediate groups of stitches of
In order to protect the hands of the operator from
the points of group C prevents or minimizes sagging so
contact with points 28 and in order to conceal these 20 that when the remaining unimpaled stitches of the course
points which may otherwise confuse the operator, the
are pushed against the short points 28, all of the stitches
machine includes a guard 46 which covers the outer ends
will be impaled and will be in a position to be sewed
of points 28."
together. While the spacing of the groups of points
The operation is as follows:
relative to the fabric may be varied according to the
The operator ?rst impales the leading groups of stitches 25 gauge ‘of the machine, the denier of the yarn, and the
B’ onto group B of points 26 and then impales the inter
tension under which the yarn is knit, it has been found
mediate groups of stitches C’ on groups C of said points
that a ratio of about sixteen to ?fteen is satisfactory in
and, lastly, the operator impales the trailing groups of ' ' connection with the looping of the opening of a stock
stitches A’ on groups A of points 26. As the dial rot-ates,
ing. This means that, if ?fteen stitches of a stocking
vertical blade 30 and horizontal plate 32‘ coact to push the 30 fabric span ?fteen units of length, the ?fteen points on
intermediate stitches onto points 28 and to push the
which said stitches are to he impaled will span sixteen
stitches already impaled on points 26 inwardly of these
units of said length so that the portion of fabrip formed
points.
.
by said ?fteen stitches will be stretched and each of the
Because the operator has to impale a very small num
stitches will be more widely open than if the span covered
ber of stitches on spaced, readily visible and accessible 35 .by said stitches were equal to the span covered by said
points.
points, the impaling time is greatly reduced and the dial
can, therefore, be rotated at a correspondingly increased
What we claim is:
speed. Experiments have shown that, in the stocking in
dustry, the dial and the looping needle are both capable
sewing dial,
l. A looping machine comprising a
of operation at a speed much higher than they are 40
presently operated, and that this is due to the limitation
inherent in manual impalement of all of the stitches of a
course, which, in the case of the toe opening of a seam
porting points including
less stocking, number about 150 on each side of the
opening.
7
' stitch supporting points which project radially and
horizontally from the periphery of said dial and on
which all of the stitches of the courses of fabric to be
sewed are adapted to be serially impaled, said sup
45
In manually impaling all of the stitches on the points
of a conventional knitting machine, the operator ?rst
locates the endmost stitch in the course to be looped and
impales it on a conventional point. Thereafter, the op
erator stretches the adjacent portion of the fabric (about 50
spaced end points for receiving end stitches of said
courses and intermediate points for receiving the in
termediate stitches of said courses, said spaced points
projecting to a' greater extent than said’inter-mediate
points.
' 2. A rotary sewing dial including spaced, circumferen
one inch span, more or less, at a time) and irnpales the
tially spaced groups of end stitches of the courses of
stretched stitches on corresponding points, and so on,
fabric to be sewed and an intermediate group of consecu
until all of the stitches of the course are impaled. When
tive stitch supporting points for receiving the inter-mediate
two ‘fabrics are to be joined, such as the two sides of
stitches of said courses, the points of said end groups
the toe opening of a stocking, it is critical that the cor 55 projecting outwardly to a greater distance than the points
responding stitches be impaled on the same points and,
in the absence of any indication, matching the stitches
in one piece of fabric with those of another is difficult
and is responsible for a large number of defects. By the
of said intermeidate groups, a guard covering the points
of said intermediate groups and the corresponding por
tions of the points of said spaced groups as they move
through a predetermined arc whereby only the outer
present invention, the marking of key stitches indicates 60 portions of the points of said spaced groups project be
to the operator which stitches go on which points, thereby
yond the edge of said guard and are accessible for manual
insuring better results regardless of whether a single, or
impalement thereon of the stitches of said end groups
double, thickness fabric is to be looped. For example,
thereby to align the intermediate stitches of said courses
by impaling stitches B’ on points B, stitches C’ on points
with the points of said intermediate groups, means for
C, ‘and stitches A’ on points A, the remaining stitches of 65 rotating said dial to move all of said points away from
the course will be aligned with intervening points 28v so
said guard, a pusher for mechanically moving the stitches
as to be consecutively impaled on these needles by blade
of said end groups further inwardly of their respective
30 in the manner set forth.
points and for impaling said intermediate stitches on the
In order to prevent the fabric from sagging between
points of said intermediate groups, and means for actu
point groups A, C and B, and in order to insure that a 70 ating said pusher synchronously with the rotation of said
stitch pushed by blade 30 will be impaled on the intended
dial.
corresponding point, even through the stitch may not be
,3. The structure recited in claim 2 in which the dis
in absolutely perfect, or dead center, alignment with its
tance between the endmost points of said end groups for
‘corresponding point, provision is made to stretch the
any given course of'stitches'to be sewed is greater than
'fabric lengthwise of the course. This is done by spacing 75 the length of said course, measured in relaxed condition,
3,094,954.
whereby impalement of ‘the endmost stitches of said
of points located between said groups for receiving
course on said endmost points stretches said intermediate
the intermediate stitches of said courses, the free
ends of the points of said end groups being at a
greater distance from the periphery of said dial than
the points of said intermediate group.
6. The structure recited in claim 5 and a pusher in
stitches and aligns them with the points of said inter
mediate groups.
4. A rotary sewing dial including spaced peripheral,
radially projecting points adapted to receive the corre
sponding stitches of the courses of fabric to be sewed,
said courses being spaced from the margin of the fabric,
a pusher for impaling said stitches on said points, said
push-er including a ‘relatively narrow member engageable 10
cluding
a ?rst blade adapted to enter between adjacent sup
porting points to push adjoining stitch onto the
corresponding points and a second blade for simul
taneously engaging the margin of fabric above said
with the yarn forming the stitches and movable inward-1y
and outwardly in the spaces between said points, and a
points and pushing it radially inwardly of said points.
horizontal member which is eng-ageable with the marginal
7. The structure recited in claim 5 and at least one
fabric above said points to push said marginal fabric in
additional group of points spaced from, and located be
wardly radially of said points, and means for rotating 15 tween, said end group, the outer ends of the points of
said dial ‘and for synchronously reciprocating said pusher.
5. A machine for joining the corresponding stitches
of two courses of ‘knit fabric, said machine including
a sewing ‘dial,
stitch supporting points projecting radially from said 20
dial and on which all of the stitches of said courses
are adapted to be serially impaled,
said supporting points consisting of at least two end
groups of consecutive points for receiving corre
sponding ‘groups of stitches at the opposite ends of 25
said courses, and at least one intermediate group
said additional group being located at the same distance
from the periphery of the dial as the outer ends of the
points of said end groups.
References Cited in the ?le of this patent
UNITED STATES PATENTS
400,062
1,672,021
Davis et al ___________ __ Mar. 26, ‘1889
Cohen _______________ __ June 5, 1928
2,548,234
2,632,414
2,948,240
Oliver ______________ __ Apr. 10, 1951
Lomax et al ___________ __ Mar. 24, 1953
Burd et al. ___________ __ Aug. 9, 1960
Документ
Категория
Без категории
Просмотров
0
Размер файла
521 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа