close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3087309

код для вставки
April 30, 1963
J. J. MERTENS
3,087,299
BALLOON-CONTROL ON FALSE—TWIST SPINDLE
Filed NOV. 24, 1961
2 Sheets-Sheet 1
l/iAf /Al
INVENTOR.
JOHAN JACQUES MERTENS
ATTORNEY
April 30, 1963
J. J. MERTENS
3,087,299
BALLOON-CONTROL’ ON FALSE-TWIST SPINDLE
Filed Nov. 24, 1961
2 Sheets-Sheet 2
INVENTOR
Jo/zm Jacques Marie/as
TTORNEYS
tent
1
1
"ice
3,887,299
Patented Apr. 30, 1963
2
the thread processing machine (not shown). The false
3,087,299
BALLOON-CONTRGL 0N FALSE-TWIST SPINDLE
Johan J. Mertens, Arnhem, Netherlands, assignor to N.V.
Gnderzoekingsinstitnut Research, Arnhem, Netherlands,
a corporation of Netherlands
Filed Nov. 24, 1961, Ser. No. 154,592
Claims priority, application Netherlands Dec. 6, 1960
6 (Zlaims. (Cl. 57-77.3)
twisting device includes a rotatable body 14 having there
through an axial bore 15. A portion of the outer surface
of the rotatable body 14 lies within housing 13-. This
portion is mounted in the bearings 11 for free rotation.
Beyond the housing 13, the body 14 is provided with an
integral sheave 16 adapted to co-act with a belt 17 by
which it is rotated in a manner known to the art.
A
small cylinder 18 of hard material is cemented to the
This invention relates in general to a thread twisting 10 upper end of the protruding part of the body 14. This
cylinder 18 is provided with an axial bore at 19‘ and has
apparatus and more particularly to an improved false
a ?at external face at 20. In the region indicated by
twisting device of the rotating tube type.
the numeral 21 the protruding part of the rotatable body
It is known to impart twist, particularly false twist, to
14 is ?attened on two sides. It is also provided with a
thread by the use of a rotating tube of the type to which
this invention generally relates. In utilizing the teachings 15 transverse hole at 22 which communicates with the upper
end of the bore 15. At the point of intersection of the
of the prior art a hollow cylindrical tube is rotatably
bore 15 with the hole or aperture at 22, there is located
mounted in bearings which are supported from a station
a guiding eyelet 23 of a hard material. This eyelet is
ary housing. The conventional manner of rotating the
cemented into an enlarged cavity at the end of the bore
tube is by the use of a drive belt which engages a pulley
section of the outer periphery of the tube and thus im 20 15. Tightly ?tted over the protruding part of the rotata
ble member 14, there is a jacket 24. This jacket may be
parts rotation thereto. Near the discharge end of the
cylindrical. It slides over the rounded portion and de?nes
tube there is rigidly mounted an encircling body of a
with the ?ats at 21 two elongated spaces of segmental
hard material. This body is provided with a bore having
cross-section. One end of the jacket 24 is near the guid
an axis normal to the axis of the rotatable tube. The
thread passes through the longitudinal opening in the 25 ing eyelet 23 and the other end is near the bore v19
tube, outward of the tube, longitudinally through the
bore of the encircling body, one or more times around
the outermost portion of the encircling body and then to
conventional feed rollers. The tube is rotated by conven
tional means and a uniform twist is imparted to the
thread fed therethrough.
A system of the type described
is shown in Patent No. 2,655,781 and a false twister of
the type shown in Patent No. 2,893,198 may be used in
such a system.
through the cylinder 18. The cross-section of the jacket
24 is unimportant so long as it allows space for the threads
between the ?ats at 21, its own inner wall, and so long as
it ?ts the member 14 snugly.
To commence the use of the device shown in the draw
ings a thread 25 supplied from a conventional twist stop
(not shown) is pulled through the bore or channel 15
and then twice pulled through the channel 19 so that the
angle of wrap is about 500°. The thread 25 is then lead
While the false twisting device described above has 35 over a thread discharge device (not shown). As soon as
the thread supply device and the thread discharge device
been used commercially for crimping threads, it has been
have been started and rotation of the false twister has
found that from time to time yarn breakage occurs. Yarn
been brought about by action of the belt 17, the portion
breakage causes long operational delays since the yarn
of the thread between the stop and the cylinder 18 is
must be rethreaded through the settling and false twisting
devices. Furthermore, each time there is a yarn breakage, 40 twisted. This twist may, in the case of thermoplastic
yarns, be ?xed by heating followed by cooling. The twist
a length of yarn is drawn off which is not crimped and
is removed from the thread in a step in the process which
which must therefore be later separated from the ?nished
is accomplished beyond the guide 18. Since the ?laments
crimped yarn.
It has been very di?icult to ascertain the cause of
yarn breakage in a system of this type because the velocity
and tension of the yarn are very high, but nevertheless,
by use of the present invention breakage is greatly re
duced.
It is therefore an object of this invention so to improve
false twisting apparatus of the type shown in Patent No.
2,893,198 that the number of yarn breakages per unit of
are ?xed in the form of a helical line, a high stretch thread
is obtained.
The thread 25 runs inside the jacket 24 which is a slid
ing ?t over the part of the rotatable body in which the
guiding members are located. The choice of dimensions
is such that it is possible to cement the cylinder 18 in
position and thereafter to slide the jacket 24 into position.
When the jacket 24 is in position the bore of the cylinder
18 is unobstructed, but the jacket nevertheless surrounds
the lower portion of the cylinder. The jacket 24 has the
additional advantage that the thread may be lead through
reduction in the number of instances when the removal of 55 the bore and subsequently around the wall of the guiding
member. A similar advantage is obtained with regard to
lengths of uncrimped yarn from ?nished crimped yarn
threading the yarn through the bore of the rotatable body
bodies is required.
when the jacket is near that bore.
Other objects and advantages of the invention will be
What is claimed is:
apparent from the following detailed description of a pre
1. A thread twisting apparatus comprising a rotatable
ferred embodiment thereof in conjunction with the an 60
body having a thread passageway extending axially part
nexed drawings, FIGURE 1 of which is a partial section
way therethrough, an elongated encircling guiding member
al view taken along the axis of rotation of a false twisting
of wear-resistant material having a bore therethrough,
device constructed in accordance with the principles of
said member being rigidly mounted on said body adjacent
the present invention, and FIGURE 2‘ is a sectional view
operating time is greatly decreased.
By use of the present invention, production is inter
rupted far less frequently and there is a corresponding
of the same device as shown in FIGURE 1 with the jacket
24 bisected to show the position of the thread in relation
to the spindle and the jacket.
Referring to FIGURE 1 in greater detail, the false
twisting device indicated generally by reference numeral
‘10 is rotatably supported by ball bearings 11 within the
core 12 of a stationary housing 13. The housing 13 may
be attached in any conventional manner to the frame of
one end thereof and spaced from one end of said passage
way with its bore at an angle to said passageway and a
sleeve rotating with said body and frictionally connected
to and de?ning with a portion of said body a yarn pas
sageway of large cross-section between said one end of
said passageway and an end of said guiding member.
2. A thread twisting apparatus comprising a rotatable
body having a thread passageway extending axially part
3,087,299
3
way therethrough, an elongated encircling guiding member
of wear-resistant material having avbore therethrough,
said member being rigidly mounted on said body adjacent
one end thereof and spaced from one end of said passage
way with'itsbore at an angle to said passageway and a
sleeve de?ning with a portion of said body a yarn pas
sageway of large cross-section between said one end of
said passageway and‘ an end of said guiding member,
4
body having a thread passageway extending axially part
way therethrough, an elongated encircling guiding mem
ber of wear-resistent material having a bore therethrough,
said member being rigidly mounted on said body adjacent
one end thereof and spaced from one end of said pas
sageway with its bore at an angle to said passageway,
said body having ?at areas between said guiding member
and said one end of said passageway, a sleeve rotating
said sleeve being slidable onsaid rotatable body and hav
with said body and frictionally connected to a portion
ing a cross-sectionalarea adequate to‘ clear said guiding 10 of said [body and overlying‘said ?at areas to de?ne spaces
member whereby the sleeve may be applied to the re‘
tatable body member by sliding in an axial direction over
the guiding member.
3. A thread twisting apparatus comprising a rotatable
said guiding member.
of wear-resistant material having a bore therethrough,
said member being rigidly mounted on said body adjacent
6. A thread twisting apparatus as claimed in claim 4
in which said one end of said passageway is de?ned by a
between said one end of said passageway and an end of
5. A thread twisting apparatus as claimed in claim 4
in which the ?at areas are on opposite sides of the rotata
body having a thread passageway extending axially part 15 ble body and intercommunicate through a large port which '
way therethrough, an elongated encircling guiding member
intersects said one end of said passageway.
one end thereof and spaced from one end of said passage
guiding eyelet of hard material.
way with its bore at an angle to said passageway and a‘ 20
sleeve rotating with said body and frictionally connected
‘to and de?ning with a portion of said body a yarn pas
sageway of large cross-section between said one end of
said passageway and an end of said guiding member, said
sleeve overlying a portion of said guiding member but 25
lying out of registry with said bore.
4. A thread twisting apparatus comprising a rotatable
References Cited in the'?le of-this' patent
UNITED STATES PATENTS
2,855,750
‘2,981,048
Schrenk et a1 __________ __ Oct. 14, 1958
Burnell ______________ __ Apr. 25, 1961
1,136;4l3'
France ______________ __ Dec. 29, 1956
FOREIGN PATENTS
Документ
Категория
Без категории
Просмотров
0
Размер файла
315 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа