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Патент USA US2136589

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Patented Nov.‘ 15, 1938
Hisashi Kakizaki, Okaya City, Japan, assignor
of one-half to Goshi Kaisha Masuzawa Shoten,
Okaya City, Japan, a corporation of Japan
No Drawing. Application July 21, 1937,
Serial No. 154,916
2 Claim. (Cl. 66-125)
This invention relates to a process for the mak- ' of threads or separation of the ?bers, it is neces
ing of silk knitting characterized in that, after sary to give the doubled threads previously suit
collecting silk ?laments drawn from cocoons able twist, and thus much trouble is required, and
moreover doubled threads may cause distortion
softened in heated water in a ?lament unravel
ling device. and causing it to cohere so as to give in loops in the direction of the twist, ,and num- 5
berless slight slacks are formed when the ?ne
the desired ?neness, the raw silk thread while
still containing a proper amount of water as well
as sericin is fed directly to a knitting machine,
whereby, one may carry out knitting operations
threads are drawn out during twining operations,
due to the fact that some diiference in the'ten
sion of ?ne threads is caused when each of them
is drawn from the bobbins, etc., and owing to the 10
looseness and distortion in loops the surface of
knitted work becomes rough. Even when special
thick threads are used for knitting instead of
doubled threads, the knitted work will be rough
and hard, since the special thick thread also is 15'
that consisting of ?bers doubled together with
sericin, and it is impossible to make it so pliable,
10 while deriving silk ?laments ‘from cocoons, and it
hasfor its object to reduce the cost of production
by dispensing with the reeling operations re
quired after the cohesion and ‘the preparatory
operations required before the knitting process,
and also Ito make without the technical skill re
quired'in known reeling processes superior silk
knitting which has even loops and smooth sur'
although it is subjected to soaking, and there
face and also high-elongation'and strength and
erations as'reeling, winding, doubling, twisting,
fore the knitted work made of such threads is
not even in fabric and the surface is rough
rather than that made of'doubled threads, and
thus the quality of knitted work is worse.
In known methods, cocoon ?laments are de
rived while the thread is reeled on a small reel
at a high speed, so that it is dimcult to avoid 25
difference in ?neness being caused by snap of
soaking, drying, cone winding, etc., and conse
quently the cost of production of raw silk is in
creased and a large quantity of waste is produced
?neness during the reeling operations, and thus,
preserves the luster and taste characteristic to
20 the cocoons under treatment.
Heretofore, it has been necessary, before feed
ing silk threads to a knitting machine, to sub
ject the threads to drying at a high temperature
while the silk ?laments arev drawn from cocoons
25 softened in heated water, and also to such op
?laments during the unravelling operations, and
it is also di?icult to rectify the unevenness in
although superior raw silk is used for knitting, 30
during said operations‘. Moreover, the friction,
the defects owing to the unevenness in ?neness
elongation and winding to which the threads are
subjected _. during said operations, and handling
of raw silk cause lowering of the strength and
cannot be removed.
of threads, and the drying of‘ threads at a high
temperature during the reeling process results in
pensed with, and saididefects due to the twining
of threads are removed and, moreover, the speed
In the‘ present invention, however, threads hav
' ing the desired ?neness arederived ‘from cocoons
necessary to reel the thread on the small reel
after the cohesion and. the preparatory opera- 35
tions required before knitting can also be dis
elongation considerably and also cause splitting
making the threads brittle.
According to this invention, however, it is un
softened in heated water in a filament unravelling
device and caused ‘to cohere by suitable‘ means,
at which knitting operations are performed, is as
low as about one ?fth calculated on the speed at 40
which reeling operations are carriedv out in known
methods, and therefore the technical skill re
and then, while the threads still .contain a proper‘ quired
hitherto in reeling process‘ is not_necessary
amount of water
well as sericin and are in a
pliable ‘state, theyrare fed directly tova knitting
machine, and thus‘ knitting operations, are car
ried out on the one hand, and, ?laments" are de
_ rived. fromv cocoons: on the other, thereby en
abl'i'ng‘i onetp remove ‘saidjd'efects in known cases
and to‘ make‘ excellent silk knitted 'work.
- 'In-'_‘case rawsilkgthreads‘ aredoubled and used
in this invention. vIt is also possible, in this in
vention to ?nd broken‘ ?lamentsduring unravel
ling operations and hencerto piece the ?laments
together, thus preventing unevenness in ?neness.
Furthermore, in this invention, the thread is sub
jected to friction
once‘in the cohesion appa
ratus, that is,'the thread is not subjected to fric- 5°
tion, winding, elong io'n' heating etc., in various -
operations as inlkno
of threads is lower '
the knitted work'.‘
' ‘1
fesw-he'rein the quality
"by;v considerably; thus
rding'to this inven
to» that made-of Sllk- 55 "
threads superior to the “special three _A” class.
As already described, knitting operations can be
carried out in this invention while the threads are
still pliable so that the knitted work has normal
loops which are even and smooth and high in
elongation and strength, and thus this invention
enables one to make at lower cost silk knitted
work having the luster and taste characteristic
1. Process for making silk knitted work com
prising the steps of deriving silk ?laments at a
comparatively low speed from cocoons softened
in heated water in a ?lament unravelling appa
ratus, collecting and causing the ?laments to
cohere into a thread having any desired ?neness,
and feeding the raw silk thread, while still con
taining a proper amount of water as well ‘as seri
cin and being in a pliable state, to a knitting ma
to the treated cocoons.
It is also possible in this invention to feed to a ~ chine, the sericin being removed after knitting, 10
knitting machine, according to the kind of knit
whereby one is able to carry out knitting opera
ted work, the threads obtained by passing, after tions while deriving silk ?laments direct from co
the cohesion, through emulsion so that the latter
permeates between the filaments to cover each
is ?lament with the ?lm so that the thread is fed
to a knitting machine in a swelled and softened
state, and therefore the knitted work made ac
cording to this invention is softer than that made
of doubled threads and pleasant to the touch.
This invention can be carried out easily, using
2. Process for making silk knitted work com
prising the steps of deriving silk ?laments at a 15
comparatively low speed from cocoons softened
in heated water in a ?lament unravelling appa
ratus, collecting and causing the ?laments to _
cohere into a thread having any desired ?neness,
passing the thread through an emulsion so as to 20
circular knitting machines, French circular cover each ?lament with a film, and feeding the
frames and machines for full fashion.
raw silk thread, while still containing a proper
Having now particularly described and ascer ' amount of water as well as sericin and being in a
tained the nature of my said invention, and in pliable state, to a knitting machine, the sericin
25 what manner the-same is to be performed, I be
being removed after knitting.
lieve that what I claim is:
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