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Патент USA US3090108

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May 21, 1963
3,090,098
M. GOLDSTEIN
METHOD FOR SEPARATING KNITTED FABRICS
7,.2 Sheets—$heet 1
Filed May 8, 1961
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May 21, 1963
M. GOLDSTEIN
3,090,098
METHOD FOR SEPARATING KNITTED FABRICS
Filed May 8, 1961
2 Sheets-Sheet 2
3,090,098
Patented VMay 21, 1963
2
1
Other features, principles and objects of the present
3,090,098
METHOD FOR SEPARATING KNITTED FABRICS
Myron Goldstein, 28 W. 26th St., New York, N.Y.
Filed May 8, 1961, Ser. No. ‘108,644
7 Claims. (CI. 28-72.)
invention will be better understood as described in the
following speci?cation and appended claims, in conjunc
tion with the following attached drawing, in which:
FIG. 1 is a perspective view of a roll of knit-ted articles
to be separated according to the invention;
FIG. 2, is a perspective view of a part of the roll shown
This invention relates generally to knitting and more
in FIG. 1 and is illustrative of the manner in which the
particularly to a method and means for separating knitted
knitted material will pucker before the knitted articles
articles after being knitted as a knitted fabric in which
the body fabric portions or areas of the fabric corre 10 being separated are treated according to the invention;
FIG. 3, is a diagrammatic sketch illustrative of the
spond to the knitted articles and which are joined by
application of a release agent to the separating courses of
separating courses of separating thread stitch formations.
separating thread stitch formations of the knitted articles
In the knitting industry knitted articles, for example
shown in FIG. 2;
knitted sweaters, cuffs, plackets, bands or collars for
FIG. 4, is a diagrammatic sketch illustrating the ease
either a sweater or a knitted shirt, are automatically 15
which the knitted articles shown in FIG. 3 are separated
knitted with the knitted articles separably joined by
subsequent to treatment of the separating courses with a
courses of separating thread stitch formations in which
release agent according to the invention; and
a separating thread is drawn therefrom substantially
FIG. 5, is a diagrammatic sketch on an enlarged scale
longitudinally to separate the articles. When the goods
or articles are ?nished in the vgreige they are sent to be 20 illustrative of the stitch formations in a separating course
dyed. Dyeing methods differ according to the effect de
sired on the ?nished articles.
For example, in the case
separating the knitted articles illustrated in FIG. 1.
According to the drawings a knitted fabric 1 is shown
comprising a plurality of separable knitted body portions
of processed natural ?bers, synthetic or blended yarns,
or articles, for example knitted collars 2, held together
for example Orlon, banlon, helenca, etc., the effect gen
erally desired is a hard finish. To obtain the hard ?nish 25 by separating courses 3 of stitch formations of separating
threads in which a respective release or separating thread
the dyer will dye the knitted articles at a relatively high
as hereafter described is substantially withdrawn longi
temperature and decrease the amount of softener in the
tudinally from its respective separating course after sev
dye bath so that a hard ?nish is obtained on the yarns.
ering for separating the articles.
The dyeing operation, particularly when high tempera
For purposes of illustrating the invention it is assumed
tures are employed, will cause tightening of the body yarn 30
that the knitted fabric 1 having the fabric body portions
stitches of the knitted articles and the separation stitches
so that the stitch formations of the separating threads
cannot then be readily released. The failure of the sep
arating threads to release readily will often cause parting
or areas 2 representative of knitted collars for shirts has
arating thread be picked out manually thereby increasing
been through a dyeing operation after having been ?n
ished in the griege. The adjoining knitted articles 2 are
separated by separating courses of separation stitch for
mations formed, for example, in the manner illustrated
labor costs. Several techniques have been developed for
separating the articles. The knitting industry has resorted
formation is shown.
of the separating threads which will require that the sep
to the use of separating threads that disintegrate at pre
on an enlarged scale in FIG. 5 in which a cast-off stitch
The separation stitch formations
in each separation course are formed from a separating
determined temperatures below the temperature level in 40 thread 6 joining body yarns 7, 8 of the knitted articles 2.
It being understood that the body yarns 7 and 8 belong
which the knitted material is damaged. However, the use
to two articles 2 joined by a separating course 3‘.
of the special disintegrating threads requires the extra
In order to separate the knitted articles 2 the thread
heating operations and heat treating equipment to cause
6 is severed, for example by severing with a pair of
the threaded disintegration and release of the knitted arti
cles held together by the separating thread courses. More 45 scissors illustrated in FIG. 1, at a preselected point 10
over, particles of the disintegrated thread form small
and then the separating thread is withdrawn substantially
That is to
vsay the respective separating thread is withdrawn from
knitted articles causing an undesirable roughness in the
between two given knitted articles 2 which comprise
material and it sometimes becomes necessary to pick
out manually the globules or beads which is time con 50 ‘given portions of the entire roll. 'It Will be understood
that each course 3 is separated in the same manner.
suming. Soluble threads that will dissolve in special
The dyeing operation tends to create a situation in
baths are also employed and this, too, requires special
which the separating thread stitch formations are com
solutions to dissolve the separating thread courses.
pacted so that the thread 6 is not easily released. Dyeing
It is a principal object of the present invention to
provide a release agent and a method for readily sep 55 causes a tightening of the stitch formations of the sep
arating threads so that easy release of the separating
arating knitted articles held together by separation thread
threads is not permitted. In such cases the separating
stitch formations.
thread while being drawn longitudinally from its respec
A feature of the invention is the provision of an inex
tive course refuses to release itself readily and puckers
pensive release agent applied to the separating courses
for upsetting the electrostatic charge imbalance in the 60 the material as illustrated in FIG. 1, and may even part
causing a loss of time and the operator may have 'to
stitch formations of the separating courses and lubricat
actually pick out a separating thread from its respective
ing the separating threads thereby to reduce the attractive
and frictional forces between a separating thread and
According to the invention a release agent comprising
stitch formation of the courses to be separated and the
65 a spray is sprayed on the separating thread course while
separating thread to be drawn therefrom.
globules or hard beads that become distributed on the
longitudinally from its respective course.
course.
7
3
it is in a dry state. The spray is applied as an aerosol
spray 11 in small or fine particles. The agent has lubri
comprising severing the separating thread at a preselected
point to permit withdrawing thereof and before com
cating characteristics and comprises a lubricant that per
sists after application. The agent lubiica-tes the ?bers
and permits easy Withdrawal of the separating thread.
Subjecting the separating thread courses to the release
agent, which is in liquid form, also upsets the electro
static charge imbalance in the stitch formations of the
course due to static electricity thereby reducing the at
tractive forces ‘between the threads of the stitch forma 10
tions of the course to be separated and the separating
threads to be drawn therefrom. The release agent is non
staining and comprises a liquid mixture applied as a
spray having, for example, a composition, by weight,
pletely withdrawing the separating thread ‘applying a
?uid release medium thereto lubricate the separating
thread and reduce at least the frictional forces between
said body portions to be separated and the separating
thread to be withdrawn.
2. A method of separating knitted fabrics and articles
having two separable body fabric portions joined by a
separating thread stitch formation adapted to be with
drawn from between the adjoining body portions, com
prising severing the separating thread at a preselected
point to permit withdrawing thereof, and at least before
completely withdrawing the separating thread applying a
as follows:
15 fluid release medium thereto as small particles to lubri
SPRAY
3% Dimethylpolysiloxane With an Average of 1250
S.S.U. at 100° C., Speci?c Gravity 0.972 at 25° C.,
cate the separating thread and reduce at least the fric
tional forces between said body portions to be separated
and the separating thread to be withdrawn.
481/2% of Trichloromono?uoro A/Iethane, 48%.% of
3. A method of separating knitted fabrics and articles
20 having at least two separable body fabric portions joined
Dichlorodi?zrorametlzane
by a separating thread stitch formation adapted to be
The spray is formulated by ?rst mixing well the di
with-drawn from between the adjoining body portions,
methylpolysilixane and the trichlormono?uoro methane.
comprising severing the separating thread at a preselected
The mixture is ?lled, for example, in an aerosol can and
the can is sealed. The dichlorodifluoromethane is pres 25 point to permit withdrawing thereof, withdrawing said
separating thread, and before completely withdrawing
sure ?lled into the can and acts as a propellant for the
said separating thread applying a fluid release medium
mixture when applied as hereafter described. The spray
thereto as small particles while said ‘separating thread
can also be canned by using a cold ?lling system.
is in'a dry state to lubricate said separating thread and
The release agent is usable on all types of natural and
synthetic ?bers, for example, cotton, nylon, banlon,
helenca, ‘Orlon, acrylon and blended ?bers. It has been
found that the lubricant spray will persist on the surface
reduce at least the frictional forces between said ‘body
30 portions to be separated and the separating thread to be
withdrawn.
4. A method of separating knitted fabrics and articles
having at least two separable body fabric portions joined
of relatively absorbent threads or yarns made of absorb
ent fibers, for example, cotton. The liquid mixture is
by a separating thread stitch formation adapted to be
contained in an aerosol can 12 and applied along the
withdrawn from between the adjoining body portions,
comprising severing the separating thread at a preselected
point to permit withdrawing thereof, withdrawing the
separating thread to separate said body fabric portions,
and at least before completely withdrawing the separating
individual courses manually. It will be understood, how
ever, that the release agent may be applied by mechanical
automatic means, not shown, where the knitted fabric is
transported longitudinally and devices on the automatic
machine actuated to carry out a spraying or application as
?ne or small particles in the manner in which an oper
thread applying a fluid release medium thereto as an
aerosol spray while said separating thread is in a dry
ator would apply the release agent manually as hereto
state of lubricate the separating thread and reduce at
fore described.
least the frictional forces between said body portions
The release agent is applied along the individual sepa
ration courses and along the boundaries of the knitted 45 to be separated and the separating thread to be withdrawn.
5. A method of separating knitted fabrics and articles
articles while they are in a dry state as illustrated in FIG.
having at least two separable body fabric portions joined
3. The separating threads of the respective courses are
by a separating thread stitch formation adapted to be
then readily withdrawn in the direction of the arrow as
withdrawn from between the adjoining body portions,
illustrated in FIG. 4 without puckering of the material
comprising severing said separating thread at a pre
‘and without eventual parting of the separating threads.
selected point to permit withdrawing thereof, and at least
The separating threads are pulled substantially right after
before completely withdrawing said separating thread
applying the spray in the method according to the in
applying a fluid release medium thereto as an aerosol
vention. The spray when applied also upsets the elec
spray to lubricate said separating thread and reduce at
trostatic charge imbalance caused ‘by static electricity
least the frictional forces between said body portions to
which results from the manufacturing and handling of
be separated and said separating thread to be Withdrawn.
the material.
6. A method of separating knitted fabrics and articles
While one type of separation course stitch formation
having at least two separable body fabric portions joined
has been illustrated it will be understood that the inven
by a separating thread stitch formation adapted to be
tion is applicable to other stitch formations,rfor example,
the tubular type stitch formation which is a relatively 60 withdrawn from between the adjoining body portions,
comprising severing said separating thread at a pre
tight stitch formation to begin with even prior to dyeing
selected point to permit withdrawing thereof and before
of the materials. It has been found that the method
completely withdrawing said separating thread applying
according to the invention for separation of knitted arti
a liquid release medium thereto as a spray while said
cles is particularly effective in preparing these tight stitch
separating thread is in a dry state to upset electrostatic
formations for easy separation.
charge imbalance in said stitch formation and to lub
While a preferred embodiment of the invention has
ricate the separating thread therebyrto reduce attractive
been shown and described, it will be understood that
and frictional forces in said stitch formation and between
many modi?cations and changes may be made within
said body portions to be separated‘ and the separating
the true spirit and scope of the invention.
70
thread to be withdrawn.
7. A method of separating knitted fabrics and articles
1. A method of separating knitted fabrics and articles
having at least two separable body fabric portions joined
by .a separating thread stitch formation adapted to be
withdrawn from between the adjoining body portions, 75
having at least two separable body fabric portions joined
by separating thread stitch formation adapted to be with
drawn from between the adjoining body portions, com
prising severing said separation thread at a preselected
point to permit withdrawing thereof, and before com
What I claim and desire to secure by Letters Patent
15:
8,090,098
5
pletely withdrawing said separating thread applying a
thread being done without need of subsequently drying
liquid release medium thereto as a spray while said sepa
the article having the stitch formation on which said
rating thread is in a dry state to upset electrostatic charge
imbalance in said stitch formation and to lubricate the
separating thread thereby to reduce attractive and fric
tional forces in said stitch formation and between said
References Cited in the ?le of this patent
UNITED STATES PATENTS
medium is applied.
body portions to be separated and the separating thread
2,422,154
Weller _______________ __ June 10, 1947
to be withdrawn, said liquid having the characteristic of
2,717,842
, Vitalis _______________ __ Sept. 13, 1955
having lubricating qualities that persist when applied, said
2,779,084
Kastrinsky ____________ __ Jan. 29, 1957
liquid spray being applied substantially close in time be
fore withdrawing said thread from between said body
fabric portions, and the withdrawing of said separated
2,882,239
Comings et al _________ __ Apr. 14, 1959
3,004,871
Leavitt ______________ __ Oct. -17, 1961
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