US3719332A - Method of securing a thread to a bobbin and a thread wound bobbin - Google Patents

Method of securing a thread to a bobbin and a thread wound bobbin Download PDF

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Publication number
US3719332A
US3719332A US00078496A US3719332DA US3719332A US 3719332 A US3719332 A US 3719332A US 00078496 A US00078496 A US 00078496A US 3719332D A US3719332D A US 3719332DA US 3719332 A US3719332 A US 3719332A
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US
United States
Prior art keywords
thread
bobbin
core
set forth
thermoplastic material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00078496A
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English (en)
Inventor
The Mclain P Hardy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Soo Valley Co
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Soo Valley Co
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Filing date
Publication date
Application filed by Soo Valley Co filed Critical Soo Valley Co
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Publication of US3719332A publication Critical patent/US3719332A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/32—Tongs or gripping means specially adapted for reeling operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H65/00—Securing material to cores or formers
    • 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

  • ABSTRACT The thread is heat sealed to the bobbin either by flowing the material of the bobbin about the thread or by sealing the thread directly to the bobbin under heat and pressure. Either one of the thread or bobbin must be made of a thermoplastic material.
  • the invention provides a method of securing a thread to a bobbin wherein at least one of the thread and bobbin is formed of a thermoplastic material as well as a thread wound bobbin of simple construction.
  • the method of the invention includes the steps of positioning a portion of the thread on a portion of the bobbin and of applying heat and pressure to the thermoplastic portion of the thread and bobbin portions to cause the heated thermoplastic portion to flow and become heat sealed to the other portion.
  • the heat and pressure are applied so as to cause the portion of the bobbin contacting the thread to flow about the thread in order to entrap the thread within the bobbin.
  • the thread Upon cooling of the bobbin, the thread is securely held in place, however, this securement is such that the thread can be slipped from the bobbin upon the application of a sufficient force so that the entire thread can be removed from the bobbin, for example, during the operation of a sewing machine in which the bobbin is placed.
  • a single electrically heated temperature controlled rod or die can be used.
  • a die can have a flat surface or a curved surface which matches the bobbin diameter so as to heat substantially all of the portion of the bobbin adjacent to the thread.
  • the rod or die can have a V-shaped groove so as to receive the thread therein while heating spaced portions of the bobbin so as to form the bobbin material in a manner to cover the thread more thoroughly.
  • the thread In the case where the thread is of thermoplastic material, the thread itself is heated under pressure so as to become heat sealed directly to the bobbin.
  • the thread and bobbin are made of thermoplastic material.
  • the thread can be made of metal, plastic, or plastic coated wire, while the bobbin is made of a thermoplastic material having a lower melting point than the thread.
  • the bobbin can be made of metal, non-thermoplastic material, or thermoplastic material while the thread is made of a thermoplastic material having a lower melting point.
  • a In Nylon monofilament or multifilament thread can be heat sealed to Nylon 6, polystyrene ABS or polypropylene bobbins. These bobbins could be used for plain or coated copper wire, cotton thread, polyester thread, acrylic thread, rayon thread, as well as other natural fiber threads.
  • the thread can be of round cross-section or can be a ribbon.
  • the thread can be a monofilament or a multifilament.
  • the thread wound bobbin of the invention constitutes the combination of a bobbin and a thread wound on the bobbin, at least one of which is made of a thermoplastic material, and the thread has a portion near one end which is secured to the bobbin by heat sealing.
  • FIG. 1 illustrates a perspective view of a free end of a thread heat sealed to a bobbin according to the invention
  • FIG. 2 illustrates a partial cross-sectional end view of a thread in position on a bobbin for application of heat and pressure to the bobbin according to the invention
  • FIG. 3 illustrates a fragmentary view of a thread entrapped within a portion of a bobbin heated by a grooved heated rod
  • FIG. 4 illustrates a cross-sectional view of a thread entrapped within a bobbin according to the invention
  • FIG. 5 illustrates a ribbon secured to a bobbin by a grooved heated rod according to the invention
  • FIG. 6 illustrates a view of a round thread in position on a bobbin prior to securement thereto according to the invention
  • FIG. 7 illustrates a cross-sectional view of a heat sealed portion of a round thread which has been secured to a portion of a bobbin
  • FIG. 8 illustrates a modified structure according to the invention having a pair of ends of a metal wire extending from a core of a spool according to the invention
  • FIG. 9 illustrates a cross-sectional view of a plastic coated wire in position on a core of a spool prior to securement thereto according to the invention.
  • FIG. 10 illustrates a cross-sectional view of the plastic coated wire of FIG. 9 heat sealed to the core of the spool.
  • a bobbin I1 is formed with a core 12 of generally cylindrical cross-section and a pair of circular flanges 13 at the ends of the core 12.
  • a thread 14, for example, of round cross-section has an end which is secured to a portion 15 of the bobbin core surface so that the remainder of the thread can be wound up on the core 12.
  • Both the bobbin 11 and thread 14 are made of thermoplastic material; however, the spool 11 is made of a material which has a lower melting point than the material of the thread 13.
  • the thread 14 can be made of a thermoplastic Nylon monofilament which has a melting point of 418 F while the bobbin 1 1 is of another suitable therm'oplastic material.
  • an electrically heated temperature controlled rod 16 or other suitable means is positioned between the flanges 13 of the spool 11 with the thread 14 positioned under the rod 16.
  • the lower surface 17 of the rod 15 is flat or curved transversely to conform to the contour of the core 12 and is provided with a V-shaped longitudinal groove 18 therein which is sized to straddle the thread 14.
  • the rod 16 is heated and is pressed against the bobbin core surface (FIG. 3) so as to cause the portion 15 of the bobbin 11 influenced by the heat and pressure of the rod to soften and flow about the portion of the thread 14 within the V-shaped groove 18.
  • the rod 16 is removed and the bobbin 11 is permitted to cool so as to solidify the material surrounding the thread 14.
  • the thread 14 is thus circumferentially entrapped and secured within the bobbin 11 (cf. FIG. 4).
  • the securement of the thread 14 in the bobbin 1] is such that the integrity of the thread 14 portions within and adjacent to the deformed bobbin portion 15 is substantially maintained i.e. the shape is maintained and the thread 14 is not made integral with the bobbin material.
  • the thread 14 can be subsequently pulled from the bobbin 11 when a sufficient pulling force is exerted on the thread, e.g. when the thread 14 is pulled during an unwindingoperation when utilized in a sewing machine.
  • the force required is such that the thread would not be inadvertently pulled from the bobbin during manufacture.
  • a ribbon 19 of material can also be secured to the core 12 of a bobbin 11.
  • the rod 16 for heating and pressing against the core 12 is formed with a substantially rectangular shaped groove 20 so as to have the ribbon 19 positioned therein.
  • V-shaped groove 18 (FIG. 3) or the rectangular groove 20 (FIG. 5), where the ribbon is used, permits the plastic material of the bobbin 11 to cover over the thread 14 more thoroughly than if a smooth surfaced rod were used.
  • the thread 14 can be made of a material which has a lower melting point than the material of the bobbin 11.
  • the thread 14 can be made of a thermoplastic Nylon monofilament while the bobbin 1 1 is made of metal.
  • a portion of the thread 14 resting on the core 12 is subjected to heat and pressure directly from a rod 21 having a smooth flat lower surface 22 and is deformed under heat and pressure into a flattened shape so as to be heat sealed to the core surface of the bobbin (cf. FIG. 7).
  • the invention can also be utilized in forming a transformer core or other similar structure.
  • a spool 22 having a pair of flanges 23 of relatively large diameter and a core 24 of smaller diameter is provided with a coil 25 of metal wire 26 such as copper wire.
  • the metal wire 26 is encased within a coating 27 of thermoplastic material which is of a lower melting point than the material of the spool 22 while the spool 22 is made of a thermoplastic material or any other suitable material.
  • a portion 28 of the plastic coated wire 26 spaced from a free end of the wire 26 is heat sealed to either a flange 23 of the spool 22 or to the surface of the spool core 24 as above described by a suitable tool 21.
  • This allows a short tag end 29 of the starting end of the wire 26 to project from the spool 22 so as to permit an electrical connection (not shown) to be made thereto.
  • the wire 26 is then wound about the core 24 to form the coil 25 and is severed to form a second tag end to provide for a further electrical connection.
  • the heat sealing of the thread and bobbin can also be carried out by the use of radio frequency methods, for example, as are used to spot weld various plastic materials, or ultrasonic energy methods wherein ultrasonic energy is converted to heat at a point of contact, as is known in fastening or sealing plastic parts together.
  • radio frequency methods for example, as are used to spot weld various plastic materials
  • ultrasonic energy methods wherein ultrasonic energy is converted to heat at a point of contact, as is known in fastening or sealing plastic parts together.
  • pressure may be applied to the thread or to the thread and bobbin to more efficiently obtain the heat sealing effect of the invention.
  • the invention thus provides a technique of securing a thread to a bobbin in a simple efficient reliable manner. Further, the invention provides a thread wound bobbin or spool which can be readily used in any suitable environment, for example, for use in a sewing machine or in an electrical device. Because of the simple securement of the thread to the bobbin, when being unwound from the bobbin, the thread can be easily pulled under a sufficient force from the deformed portion of the spool. It is to be noted that any slight deformation of the thread, if any, with respect to the bobbin or vice versa in the area of attachment is sufficiently slight so as not to interfere with the pulling of the thread from the bobbin under the intended force.
  • the free end of the thread can then be utilized, for example, for passing through the eye of a sewing machine needle, without obstructing other components of the system to which the thread is unwound.
  • the invention further provides a technique which can be utilized on a high speed basis in automatic machinery.
  • the cost of labor and equipment can be substantially reduced over relatively short time periods.
  • This permits a thread wound bobbin to be produced at a relatively low cost.
  • the bobbins can be made of relatively inexpensive materials, the overall cost of the threaded bobbin is further reduced.
  • the invention further permits the use of a bobbin having unencumbered surfaces so that there is no need to produce or otherwise obtain bobbins with complex thread securing means thereon.
  • a method of securing a thread to a bobbin having a core wherein at least one of the thread and bobbin is formed of synthetic thermoplastic material comprising the steps of positioning a portion of the thread on a portion of the core, and applying heat and pressure to the thermoplastic portion of said portions to cause said heated thermoplastic portion to become heat sealed to the other portion without said portions becoming integral with each other.
  • the bobbin is made of a synthetic thermoplastic material to flow around the thread portion and secure the thread portion to the bobbin upon being subjected to the application of the heat and pressure.
  • a method as set forth in claim 8 which further comprises the step of utilizing a rod for applying said heat and pressure to the thermoplastic portion of said portions to cause said heated thermoplastic portion to become heat sealed to the other portion.
  • step of applying heat and pressure includes the further step of circumferentially encasing said thread portion in said thermoplastic portion of said bobbin.
  • said thread is made up of a synthetic thermoplastic material having a lower melting point than the material of the bobbin.
  • a method as set forth in claim 8 which further includes the step of extending a free end of the thread from said spool adjacent to said portion secured to the spool, winding the thread about the core portion of the spool and extending a second end of the thread from said spool.
  • a method of securing a thread to a bobbin having a core wherein at least one of the thread and bobbin is formed of synthetic thermoplastic material comprising the steps of positioning a portion of the thread on a portion of the core, and applying heat to the thermoplastic portion of said portions to cause said heated thermoplastic portion to become heat sealed to the other portion without said portions becoming integral with each other.
  • the bobbin is made of a synthetic thermoplastic material to flow around the thread portion and secure the thread portion to the bobbin upon being subjected to the application of the heat.
  • a bobbin having a pair of flanges and a core extending between said flanges and a coil of synthetic plastic coated metal wire wound about said core and having a first tag end extending from said bobbin and a second tag end extending from said bobbin, said coil having at least one portion thereof heat sealed to either said flange or core of said bobbin, said bobbin being made of synthetic thermoplastic material to permit heat sealing of said portion of said coil with said bobbin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
  • General Induction Heating (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00078496A 1970-10-06 1970-10-06 Method of securing a thread to a bobbin and a thread wound bobbin Expired - Lifetime US3719332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7849670A 1970-10-06 1970-10-06

Publications (1)

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US3719332A true US3719332A (en) 1973-03-06

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Application Number Title Priority Date Filing Date
US00078496A Expired - Lifetime US3719332A (en) 1970-10-06 1970-10-06 Method of securing a thread to a bobbin and a thread wound bobbin

Country Status (9)

Country Link
US (1) US3719332A (enrdf_load_stackoverflow)
JP (1) JPS5438224B1 (enrdf_load_stackoverflow)
AU (1) AU460991B2 (enrdf_load_stackoverflow)
CA (1) CA947267A (enrdf_load_stackoverflow)
DE (1) DE2139930B2 (enrdf_load_stackoverflow)
ES (2) ES394680A1 (enrdf_load_stackoverflow)
FR (1) FR2110994A5 (enrdf_load_stackoverflow)
GB (2) GB1358741A (enrdf_load_stackoverflow)
IT (1) IT938958B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4338147A (en) * 1978-06-21 1982-07-06 A. Ahlstrom Osakeyhtio Method and apparatus for winding a web upon a core having a stripe of hot-melt adhesive
US5254831A (en) * 1990-08-17 1993-10-19 Masahiro Seki Method of manufacturing bobbins for sewing machine
US5699975A (en) * 1996-03-14 1997-12-23 West Coast Chain Mfg. Company Extension member anchor
WO2002022484A1 (en) * 2000-08-22 2002-03-21 Tec Con As End connecting device
US20080105180A1 (en) * 2006-11-02 2008-05-08 Wieczorek Joseph P Bobbin system for use with a sewing machine
CN115744489A (zh) * 2022-11-30 2023-03-07 南京合邑电子有限公司 用于工字绕线盘的加热装置
IT202100029081A1 (it) * 2021-11-17 2023-05-17 Costruzioni Mecc M G S R L Avvolgitrice automatica di filo di materiale di apporto

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2872075T3 (es) * 2018-07-17 2021-11-02 Starlinger & Co Gmbh Dispositivo de enrollado de cintas
CN112408049A (zh) * 2020-11-20 2021-02-26 盐城保荣机械有限公司 一种流延膜生产用机换卷卸料装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460807A (en) * 1945-03-05 1949-02-08 David T Siegel Welding apparatus
US2999962A (en) * 1957-06-10 1961-09-12 Wahl Clipper Corp Coil construction
US3501110A (en) * 1967-01-24 1970-03-17 Nicholson File Co Plastic spool and method of making same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS418433Y1 (enrdf_load_stackoverflow) * 1964-08-18 1966-04-25
JPS4220996Y1 (enrdf_load_stackoverflow) * 1965-03-12 1967-12-05

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460807A (en) * 1945-03-05 1949-02-08 David T Siegel Welding apparatus
US2999962A (en) * 1957-06-10 1961-09-12 Wahl Clipper Corp Coil construction
US3501110A (en) * 1967-01-24 1970-03-17 Nicholson File Co Plastic spool and method of making same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4338147A (en) * 1978-06-21 1982-07-06 A. Ahlstrom Osakeyhtio Method and apparatus for winding a web upon a core having a stripe of hot-melt adhesive
US5254831A (en) * 1990-08-17 1993-10-19 Masahiro Seki Method of manufacturing bobbins for sewing machine
US5699975A (en) * 1996-03-14 1997-12-23 West Coast Chain Mfg. Company Extension member anchor
WO2002022484A1 (en) * 2000-08-22 2002-03-21 Tec Con As End connecting device
US20080105180A1 (en) * 2006-11-02 2008-05-08 Wieczorek Joseph P Bobbin system for use with a sewing machine
US7503270B2 (en) * 2006-11-02 2009-03-17 Irvin Automotive Products, Inc. Bobbin system for use with a sewing machine
IT202100029081A1 (it) * 2021-11-17 2023-05-17 Costruzioni Mecc M G S R L Avvolgitrice automatica di filo di materiale di apporto
CN115744489A (zh) * 2022-11-30 2023-03-07 南京合邑电子有限公司 用于工字绕线盘的加热装置

Also Published As

Publication number Publication date
FR2110994A5 (enrdf_load_stackoverflow) 1972-06-02
CA947267A (en) 1974-05-14
IT938958B (it) 1973-02-10
ES198845U (es) 1975-07-01
DE2139930A1 (de) 1972-04-13
GB1358306A (en) 1974-07-03
GB1358741A (en) 1974-07-03
ES394680A1 (es) 1974-10-16
JPS5438224B1 (enrdf_load_stackoverflow) 1979-11-20
ES198845Y (es) 1975-12-01
AU3351271A (en) 1973-03-22
DE2139930B2 (de) 1976-10-14
AU460991B2 (en) 1975-05-15

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