US3875735A - Threading bushes - Google Patents

Threading bushes Download PDF

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Publication number
US3875735A
US3875735A US325040A US32504073A US3875735A US 3875735 A US3875735 A US 3875735A US 325040 A US325040 A US 325040A US 32504073 A US32504073 A US 32504073A US 3875735 A US3875735 A US 3875735A
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United States
Prior art keywords
bush
entrance
yarn
bushes
exit
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Expired - Lifetime
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US325040A
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English (en)
Inventor
John Benyon
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Platt International Ltd
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Platt International Ltd
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Filing date
Publication date
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Publication of US3875735A publication Critical patent/US3875735A/en
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/16—Devices for entraining material by flow of liquids or gases, e.g. air-blast devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • a yarn passage is provided which extends between the entrance of the first bush and the entrance of the second bush and an airflow is caused which passes through the yarn passage and the bushes in a direction progressing from the entrance of the first bush to the entrance of the second bush, therehy drawing a running yarn in the vicinity of the entrance of the first bush through both bushes.
  • the present invention relates to a method of an apparatus for threading yarn through twist bushes. for example in texturing machines for texturing continuous synthetic filament yarn by the application of false twist to the running yarn by means of the twist bushes.
  • the drive systems in known texturing machines are provided with a crawl speed ratio to permit a broken end or a new end of yarn to be threaded through the twist bush assembly by hand.
  • the present invention seeks to provide a method of an apparatus for facilitating the threading procedure.
  • a method of threading running yarn through a pair of twist bushes in a textile machine for processing continuous synthetic filament said bushes being situated side by side with their axes mutually parallel and with the first bush having an entrance facing in one direction and an exit facing in the opposite direction and the second bush having an exit facing in said one direction and an entrance facing in said opposite direction, the method comprising providing a yarn passage extending between the exit of the first bush and the entrance of the second bush and causing airflow through the yarn passage and the bushes in a direction progressing from the entrance of the first bush to the exit of the second bush. thereby drawing a running yarn in the vicinity of the entrance of the first bush through both bushes.
  • a third bush may be provided in the textile machine, the third twist bush being disposed in the same relation to the second twist bush as the first twist bush is to the second twist bush.
  • the method comprises providing a further yarn passage extending between the exit of the second bush and the entrance of the third bush and causing an airflow through the firstmentioned yarn passage and the further yarn passage and the three bushes in a direction progressing from the entrance of the first bush to the exit of the third bush, thereby drawing a running yarn in the vicinity of the entrance of the first bush through both bushes.
  • threading apparatus comprises a pair of twist bushes situated side by side with their axes mutually parallel and with the first bush having an entrance facing in one direction and an exit facing in the opposite direction and the second bush having an exit facing in said one direction and an entrance facing in said opposite direction. and means providing a passage, for interconnecting the exit of the first bush and the entrance of the second bush, whereby the provision of an airflow which progresses through the first bush, the passage and the second bush draws a running yarn in the vicinity of the entrance to the first bush through both the bushes.
  • FIG. I shows a front elevation of a yarn texturing station of a draw texturing machine.
  • FIGS. 2 to 6 shows cross-sectional views of a first embodiment of yarn threading apparatus including two twist bushes at successive stages in a threading operation
  • FIG. 7 is a perspective view of a yarn tube of the apparatus.
  • FIG. 8 shows a modified form of the first embodiment of the yarn threading apparatus including three twist bushes.
  • FIG. 9 is a cross-sectional view of a second embodiment of yarn threading apparatus.
  • the yarn texturing station of FIG. 1 is typical of one of 148 yarn texturing stations of a draw texturing machine. Each station is fed with filament by a corresponding one of I48 filament extruders and has a pair of twist bushes 8. 10 (as described in our co-pending application No. 31922/71) mounted in a frame 7, for imparting false twist to the filament handled by the station.
  • the twist bushes 8, 10 are driven by a belt 9 which also passes around a tensioning jockey pulley I1 and and a driving motor 15.
  • the two bushes 8 and I0 are situated side by side with their axes mutually parallel and with the upper bush 8 having an entrance 13 facing in one direction and an exit 14 facing in the opposite direction and the lower bush I0 having an exit 20 facing in said one direction and an entrance IS in said opposite direction.
  • Running filament 2 delivered by a yarn feed device on the machine (not shown) is threaded through the bushes 8, 10 in the following manner. As shown in FIG. 2, the running yarn 2 is initially fed continuously into a suction nozzle 4 where it passes to waste.
  • a U-shaped plastics tube 6 is mounted permanently behind the bushes 8 and 10 with its inlet 12 in register with the exit 14 of the upper bush 8 and its outlet 16 in register with the entrance I8 of the lower bush 10.
  • the filament 2 is then threaded around the next filament feed device and the tension imposed upon the filament draws it through a continuous vertical slit 26 in the tube 6 (as shown in FIG. 7) so that the filament 2 is drawn out of the tube 6 and makes full contact with the bushes 8 and 10 (as shown in FIG. 6).
  • the suction nozzle 4 may be connected to tube 6 so that, in use, the nozzle 4 can be offered up to the bushes 8, 10 with the tube 6 behind the bushes 8, 10 so that when the nozzle 4 is rotated axially the inlet 12 and the outlet 16 of the tube 6 register with the exit 14 of the first bush 8 and the entrance 18 to the second bush 10 respectively.
  • FIGS. 2 to 7 may be modified as shown in FIG. 8, with parts common to FIGS. 2 to 7 and to FIG. 8 bearing the same reference numerals.
  • This modification comprises three twist bushes 8, i0, 25 with all three bushes arranged sideby-side with their axes parallel.
  • the first and second bushes 8, 10 are as described above with reference to the FIGS. 2 to 7 and the third bush 25 has an entrance end 27 facing in said one direction and an exit end 29 facing in the said other direction.
  • a second tube 30 of similar construction to the first tube 6 connects the exit 20 of the second bush 10 with the entrance 27 of the third bush 25.
  • the suction nozzle 4 is placed close to the exit 29 of the third bush 25 and a running yarn 2 held in the vicinity of the entrance 13 to the first bush 8 by a second suction nozzle (not shown) in the manner described above with reference to FIGS. 2 to 7 is drawn in a loop in to the first bush 8.
  • the loop then passes through the first tube 4, the second bush 10, the second tube 30 and the third bush 25 before entering the suction nozzle 4.
  • the stationary arm of the loop of yarn 2 is then severed adjacent the entrance 13 of the first bush to complete the threading operation.
  • the second suction nozzle may be switched off or removed as soon as the loop of yarn 2 enters the first bush 8.
  • FIG. 9 A second embodiment of yarn threading apparatus is shown in FIG. 9 with parts common to FIGS. 2 to 7 and FIG 9 bearing the same reference numerals.
  • the suction nozzle 4 is replaced by an inlet 21 in the tube 6 which is co-axial with the second bush l and is connected to a source of air under pressure through a valve 23.
  • the valve 23 is opened and a blast of compressed air directed through the second bush from the entrance 18 to the exit thereof.
  • This causes an associated airflow to progress through the first bush 8 and the tube 6 and the running yarn 2 forms a loop which enters the entrance 13 of the first bush 8, passes around the tube 6 and through the second bush 10 to leave through the exit 20 of the second bush 10.
  • the stationary arm of the loop can then be severed to leave the bushes 8, l0 threaded.
  • the suction nozzle 4 may be replaced by an inlet (not shown) of the type described with reference to FIG. 9 located in the second tube 30.
  • the blast of compressed air produces an airflow in the bushes 8, 10, 25 and the tubes 6, which is greater than the suction of the second suction nozzle so that the yarn 2 is drawn into the first bush 8 in a loop I claim:
  • a method of threading running yarn through a pair of twist bushes in a textile machine for processing continuous synthetic filament said bushes being situated side by side with their axes mutually parallel and with the first bush having an entrance facing one direction and an exit facing in the opposite direction, and the second bush having an exit facing in said one direction and an entrance facing in said opposite direction, the method comprising providing a yarn passage extending between the exit of the first bush and the entrance of the second bush and causing airflow through the yarn passage and the bushes in a direction progressing from the entrance of the first bush to the entrance of the second bush, thereby drawing a running yarn in the vicinity of the entrance of the first bush through both bushes.
  • a method according to claim 1 wherein the airflow through the yarn passage is produced by a blast of compressed air admitted into the passage from an inlet in the passage in such a direction that a running yarn in the vicinity of the entrance of the first bush is drawn through both bushes.
  • a threading apparatus comprising a pair of twist bushes situated side by side with their axes mutually parallel and with the first bush having an entrance facing in one direction and an exit facing in the opposite direction and the second bush having an exit facing in said one direction and an entrance facing in said oppposite direction, and means providing a passage for interconnecting the exit of the first bush and the entrance of the second bush. whereby the provision of an airflow which progresses through the first bush, the passage and the second bush draws a running yarn in the vicinity of the entrance to the first bush through both bushes.
  • Apparatus according to claim 14 wherein the passage is defined by tube having an inlet for registering with the exit of the first bush and an outlet for registering with the entrance of the second bush.
  • Apparatus according to claim 15 wherein the tube has a continuous slit which extends from the inlet to the outlet and which is so dimensioned and disposed as to allow yarn to pass through it but does not cause a sufficient pressure drop in the tube as to adversely affect the airflow during threading 17.
  • Apparatus according to claim 16 wherein the tube is of circular cross-section and is arcuately bent with the slit extending along the line of shortest arc length between the inlet and the outlet.
  • Apparatus according to claim 14 wherein the tube is mounted permanently behind the pair of bushes with its inlet in register with the exit of the first bush and its outlet in register with the entrance of the second bush.
  • Apparatus according to claim 15 wherein there is provided an inlet in the tube for admitting a blast of compressed air into the tube in such a direction that a running yarn in the vicinity of the entrance of the first bush is drawn through both bushes.
  • Apparatus according to claim 19 wherein the inlet has an axis co-axial with the axis of the second bush so that the blast of compressed air passes through the second bush from the entrance to the exit thereof.
  • Apparatus according to claim 21 wherein the yarn tube is connected to the suction nozzle so that, in use, the nozzle can be offered up to the bushes so that the nozzle is then in front of the bushes whilst the tube fits behind the bushes so that when the nozzle is rotated axially, the inlet and the outlet of the tube register with the exit of the first bush and the entrance to the second bush respectively.
  • Apparatus according to claim 14 wherein the yarn tube is portable so that it may be transferred from one pair of bushes to another pair of bushes by an operative.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
US325040A 1972-01-21 1973-01-19 Threading bushes Expired - Lifetime US3875735A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB305272A GB1414672A (en) 1972-01-21 1972-01-21 Threading yarn through twisting bushes

Publications (1)

Publication Number Publication Date
US3875735A true US3875735A (en) 1975-04-08

Family

ID=9751068

Family Applications (1)

Application Number Title Priority Date Filing Date
US325040A Expired - Lifetime US3875735A (en) 1972-01-21 1973-01-19 Threading bushes

Country Status (5)

Country Link
US (1) US3875735A (en:Method)
JP (1) JPS4885845A (en:Method)
DE (1) DE2302961A1 (en:Method)
FR (1) FR2168820A5 (en:Method)
GB (1) GB1414672A (en:Method)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106275A (en) * 1976-07-31 1978-08-15 Akzona Incorporated Process and device for high speed threading of yarn into a false-twisting spindle
EP0113327A2 (en) 1982-12-28 1984-07-11 Heden-Team Aktiengesellschaft An apparatus for automatic preparation of food products such as bread, cakes and the like

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2405990C3 (de) * 1974-02-08 1981-05-14 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Vorrichtung zum Anlegen von laufenden Fäden an drehbare Walzen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3066473A (en) * 1960-03-23 1962-12-04 Maeda Yutaka Apparatus and method for imparting twist and crimp to textile yarns
US3373553A (en) * 1967-01-26 1968-03-19 American Cyanamid Co False-twist apparatus
US3535866A (en) * 1968-02-29 1970-10-27 Nippon Rayon Kk Process and apparatus for producing crimped yarns
US3605396A (en) * 1968-12-24 1971-09-20 Electrospin Corp Device for inserting filament into a radially clamping grip

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3066473A (en) * 1960-03-23 1962-12-04 Maeda Yutaka Apparatus and method for imparting twist and crimp to textile yarns
US3373553A (en) * 1967-01-26 1968-03-19 American Cyanamid Co False-twist apparatus
US3535866A (en) * 1968-02-29 1970-10-27 Nippon Rayon Kk Process and apparatus for producing crimped yarns
US3605396A (en) * 1968-12-24 1971-09-20 Electrospin Corp Device for inserting filament into a radially clamping grip

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106275A (en) * 1976-07-31 1978-08-15 Akzona Incorporated Process and device for high speed threading of yarn into a false-twisting spindle
EP0113327A2 (en) 1982-12-28 1984-07-11 Heden-Team Aktiengesellschaft An apparatus for automatic preparation of food products such as bread, cakes and the like

Also Published As

Publication number Publication date
JPS4885845A (en:Method) 1973-11-13
DE2302961A1 (de) 1973-08-02
FR2168820A5 (en:Method) 1973-08-31
GB1414672A (en) 1975-11-19

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