WO2011010093A1 - Dispositifs de signalisation - Google Patents

Dispositifs de signalisation Download PDF

Info

Publication number
WO2011010093A1
WO2011010093A1 PCT/GB2010/001380 GB2010001380W WO2011010093A1 WO 2011010093 A1 WO2011010093 A1 WO 2011010093A1 GB 2010001380 W GB2010001380 W GB 2010001380W WO 2011010093 A1 WO2011010093 A1 WO 2011010093A1
Authority
WO
WIPO (PCT)
Prior art keywords
yarn
chip
filaments
fibres
antenna
Prior art date
Application number
PCT/GB2010/001380
Other languages
English (en)
Inventor
Tilak Dias
Anura Fernando
Original Assignee
Entellfibres Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Entellfibres Limited filed Critical Entellfibres Limited
Publication of WO2011010093A1 publication Critical patent/WO2011010093A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/12—Threads containing metallic filaments or strips
    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/441—Yarns or threads with antistatic, conductive or radiation-shielding properties
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/04—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the shape
    • G06K19/041—Constructional details
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07758—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/18—Physical properties including electronic components

Definitions

  • This invention relates to signalling devices.
  • Such devices may be in the form of a tag or label, or be adapted for incorporation in or attachment to a substrate.
  • WO 2006/123 133 discloses the concept of installing an operative device such as a computer chip within the structure of a yarn. It also discloses a method of installing such a device in the yarn in a continuous process in which devices are delivered seriatim between filaments as they are drawn to form the multifilament yarn.
  • a signalling device of the present invention comprises a semi-conductor chip with conductive elements forming antenna extending therefrom, confined within a monofilament or multifilament yarn with the antenna extending in both directions along the yarn.
  • the antenna elements may be entrained within the fibres or filaments of the yarn.
  • the chip is in an enclosed capsule comprising filaments and/or fibres of the yarn, and such a capsule may comprise the filaments and/or fibres and a resin cured therebetween.
  • the conductive elements can be electro-conductive fibres or filaments, or one or more conductive wires, possibly mounted on a backing.
  • the chip might be, for example, an RFID chip.
  • the length of the yarn on either side of the capsule does not have to match the length of the antenna. It can extend beyond the antenna in one or both directions.
  • the extended length of yarn can thus be used to attach the device to an item or product.
  • Such extended lengths of yarn can also be used to bend the antenna into predetermined shapes to enhance their ability to receive and emit signals.
  • shaped antenna can also be created when the length of the yarn is coextensive with the antenna.
  • the yarn itself can be capable of plastic deformation, or made so by impregnation with a suitable resin which will also serve to locate and fix the chip within the yarn.
  • the chip in a device according to the invention can itself be part of a unit comprising a plurality of components such as those that emit an audible or visible signal.
  • such a component could be a light emitting diode coupled to a battery.
  • the multifilament yarn can include conductive filaments to connect it to an external power source.
  • the invention is also directed at a method of making a signalling device of the kind described above.
  • the semi-conductor chip may be mounted on a conductive backing such as an electro-conductive filament fibre, which extends from opposite sides of the chip.
  • the chip and backing are then confined within a monofilament yarn, or the filaments or fibres of a multi-filament yarn, with the backing extending from the chip in both directions along the yarn to form antenna.
  • One or more conductive fibres, filaments or wires can be connected to the backing to extend the effective length of the antenna.
  • the resultant product can be used as a radio frequency identification device, in yarn form.
  • a signalling device comprising a semi-conductor chip confined within filaments or fibres of a length of multifilament or multifibre yarn and conductive elements extending from the semiconductor chip in both directions along the yarn to form antenna, wherein the chip is in an enclosed capsule comprising filaments or fibres of the yarn.
  • the antenna elements may be entrained within the yarn filaments or fibres.
  • the chip may be mounted on an electro-conductive fibre or filament backing forming the antenna, or a fine metal wire backing forming the antenna.
  • the capsule may comprise resin cured between the fibres or filaments, and/or the antenna.
  • An electro-conductive fibre or filament, or a fine metal wire, may be attached to the conductive backing to extend the effective antenna length.
  • the yarn may extend beyond the antenna in both said directions.
  • the antenna may be bound in resin.
  • the semi-conductor chip may be part of a unit comprising a plurality of components.
  • One of the components may be a light-emitting diode, a semiconductor sensor, a sound emitting device or a signal transmitter.
  • the yarn may include conductive filaments or fibres connected to the chip.
  • the yarn extending from the chip may be bent or otherwise shaped or deformed to form the antenna into predetermined shapes.
  • the device may be mounted on a substrate.
  • a method of making an signalling device comprising the steps of: attaching to a semi-conductor chip a conductive backing (e.g. by mounting the chip onto the backing), an electro- conductive fibre or filament, or a fine metal wire to form antenna extending in opposite directions from the chip; and confining at least the chip within filaments or fibres of a multifilament or multifibre yarn with antenna extending from the chip in both directions along the yarn.
  • the method may further comprise attaching an electro-conductive fibre or filament, or a fine metal wire to the conductive backing to extend the effective antenna length.
  • the backing may comprise conductive (e.g. electrically conductive) fibres or filaments.
  • Filaments or fibres of the yarn may form a capsule enclosing the chip.
  • the capsule may comprise the filaments or fibres (and possibly at least a part of the antenna), and a resin cured therebetween.
  • the multifilament or multifibre yarn may be formed by delivering a plurality of filaments or fibres centripetally to a central axis and drawing them along the axis, and wherein at least the chip (possibly with one or more attached backings or conductive fibres, filaments, or wires) is delivered to the conjoining filaments or fibres at the axis.
  • the resin may be delivered to the filaments or fibres and the formed yarn and resin with the chip is drawn through a mould in which the resin cures.
  • the yarn may be held stationary relative to the mould while the resin cures.
  • the mould may be a tube through which the yarn is drawn.
  • the mould may comprise a plurality of parts movable laterally relative to the yarn axis.
  • the resin may be delivered to the conjoining filaments or fibres at the central axis.
  • FIGURE 1 shows a cross-section through a signalling device according to the invention
  • FIGURE 2 shows a view similar to Figure 1, but with conductors attached to the semi-conductor chip
  • FIGURE 3 shows a conductive backing upon which a semi-conductor chip is mounted
  • FIGURE 4 illustrates apparatus in which the signalling device can be installed within the structure of a multifilament yarn
  • FIGURE 5 is an enlarged view of a section of the apparatus of Figure 4 where the signalling device is installed.
  • Figure 1 shows a yarn 2 with multiple filaments 4 extending alongside and around a semi-conductor chip 6 with antenna 8 extending in either direction along and within the yarn.
  • the yarn filaments form a slight bulge around the chip 6.
  • the dimensions of the chip are typically of the order of a millimetre or less (e.g. 300 - 950 micrometers), and can be readily incorporated in multifilament yarns without creating a substantial distortion.
  • the yarn with the installed transponder can then be used for multiple purposes including knitting, braiding and weaving into fabrics. It can also be embroidered onto existing fabrics and garments, and if the yarn has appropriate plasticity, it can be bent to create a selected shape of antenna.
  • Figure 2 shows a yarn section similar to Figure 1 , but with additional conductors 10 extending within the yarn from the transponder for connection to an external power source. It will be noted that in each of the embodiments illustrated in Figures 1 and 2, the yarn can extend beyond the antenna. This enables semi-conductor chips and antennas to be installed in successive lengths of the same yarn, for example in a continuous production process of the kind that is described below.
  • a signalling device may be made in one of a number of ways.
  • the transponder chip is secured on to electro-conductive filaments or a very fine metal wire (e.g. a single or multi-core wire having a diameter or cumulative diameter of the order of 0.5mm or less, preferably 0.4mm or less), with appropriate contacts between the terminals of the chip (which may be or comprise antennae of an RFID chip) and the electro-conductive filaments or fine metal wire.
  • the appropriate contacts can be a strong solder bond or a polymeric conductive bond. Any excess conductive filaments or metal wire is then removed in order to prevent any short circuiting of the contact terminals of the chip.
  • the transponder chip with either electro-conductive filaments or fine metal wire attached to its contact terminals is then positioned between the fibres and filaments of the yarn, and the chip, its contact terminals and electro-conductive filaments or fine metal wire is secured within the fibres and filaments of the yarn by creating a resin encapsulation around the chip area. Any appropriate resin may be used.
  • the electro-conductive fibres and filaments or the fine metal wire will function as the antenna of the transponder chip, and this configuration of the transponder chip-antenna combination has the advantage of creating a lengthy antenna within a textile structure in order to increase the effective read-range of the transponder chip. This arrangement will also allow complex two and three dimensional antenna geometries to be woven, knitted or embroidered to enhance the read-angle of the transponder chip.
  • FIG 3 illustrates another technique for creating the transponder-antenna combination.
  • An antenna 8 e.g. a short linear antenna, which may be 1-4 mm in length
  • the chip 6 is then secured on the backing, with appropriate contact with the respective antenna.
  • An electro-conductive yarn or a fine metal wire is attached to the antenna (i.e. the backing) in order to increase its effective read range.
  • the backing is then trimmed away, along lines 14, such that its lateral dimension is substantially equal to that of the chip, and it is then ready for installation in the yarn 2.
  • Figure 4 illustrates a technique for installing the semi-conductor chip and antenna in a multifilament yarn. It is essentially a pultrusion technique in which individual filaments 4 are drawing from multiple radial directions to a central axis 14 along which they are drawn downwardly as shown. Above the point at which the filaments converge is a feeder 16 for delivering the chip and antenna along line 18 to the yarn axis 14. The combination is suspended and progressively lowered to the point of convergence of the filaments 4 whereafter it is then drawn in to the converging filaments, which then combine to hold the chip and antenna in place.
  • the apparatus is similar to that disclosed in International Patent Specification No. WO2006/123,133, the disclosure whereof is incorporated by reference.
  • the process is facilitated by forming multiple chip-antenna combinations on successive lengths of backing to facilitate their suspension over the converging filaments.
  • the final trimming can be conducted at the feeder station 16 just prior to delivery of the combination.
  • a combination can be separated from its successor just prior to it reaching the converging filaments, and the delivery of chip-antenna combinations halted to create the desired additional length of yarn between adjacent antenna ends. This can of course be accomplished with an appropriate stepping motor.
  • a curing station 20 can be created at an appropriate distance past the point 22 of filament convergence so that the resultant yarn drawn along the axis 14 has the chip and antenna safely secured therein by means of the cured resin.
  • the curing station 20 may take the form of a mould tube through which the yarn is drawn, but it is preferred to use a split mould having a plurality of parts movable laterally with respect to the yarn axis. This reduces the risk of the yarn adhering to the mould wall.
  • the mould parts are adapted to close around the yarn while the yarn is held stationary, and the mould cavity is exposed to ultra-violet radiation to cure the resin.
  • the geometry of the apparatus is designed to enable the yarn and transponder in the mould cavity to be held stationary by the device (not shown) drawing the yarn, simultaneously with the registration of the transponder/backing combination with the yarn filaments by micro-processor controlled motors, and its trimming and separation from a subsequent combination in a strip supply.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Aerials (AREA)

Abstract

Selon un aspect de l'invention, il est proposé un dispositif de signalisation comprenant une puce semi-conductrice confinée dans des filaments ou des fibres d'une longueur de fil multifilament ou multifibre et des éléments conducteurs s'étendant de la puce semi-conductrice dans les deux directions le long du fil pour former une antenne, la puce se trouvant dans une capsule fermée comprenant les filaments ou les fibres du fil.
PCT/GB2010/001380 2009-07-21 2010-07-21 Dispositifs de signalisation WO2011010093A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0912674.9 2009-07-21
GB0912674A GB2472026A (en) 2009-07-21 2009-07-21 Signalling device

Publications (1)

Publication Number Publication Date
WO2011010093A1 true WO2011010093A1 (fr) 2011-01-27

Family

ID=41058301

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2010/001380 WO2011010093A1 (fr) 2009-07-21 2010-07-21 Dispositifs de signalisation

Country Status (2)

Country Link
GB (1) GB2472026A (fr)
WO (1) WO2011010093A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107815807A (zh) * 2017-12-20 2018-03-20 广州市富元服装辅料有限公司 一种智能纱线封装机
WO2018064174A1 (fr) 2016-09-27 2018-04-05 Siren Care, Inc. Fil intelligent et procédé de fabrication d'un fil contenant un dispositif électronique
US10602932B2 (en) 2015-12-16 2020-03-31 Siren Care, Inc. System and method for detecting inflammation in a foot
CN111334912A (zh) * 2018-12-18 2020-06-26 任学勤 电磁智能纱线的生产方法
US11109807B2 (en) 2018-12-14 2021-09-07 Siren Care, Inc. Sensing garment and method for making same

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2529900B (en) 2014-09-08 2017-05-03 Univ Nottingham Trent Electronically functional yarns
FR3042203B1 (fr) 2015-10-12 2018-06-22 Commissariat A L'energie Atomique Et Aux Energies Alternatives Incorporation d'elements a puce dans un fil guipe.
GB201523093D0 (en) * 2015-12-30 2016-02-10 Univ Nottingham Trent Electronic strip yarn
GB2561490B (en) * 2016-04-07 2019-02-27 Advanced E Textiles Ltd Improvements relating to textiles incorporating electronic devices
FR3078980B1 (fr) 2018-03-14 2021-06-11 Primo1D Fil guipe compose d’une ame principale et d’au moins un fils de couverture et comprenant au moins un element filaire conducteur relie electriquement a au moins une puce electronique
DE102018114465A1 (de) * 2018-06-15 2019-12-19 Osram Opto Semiconductors Gmbh Optoelektronische faser sowie vorrichtung und verfahren zur herstellung einer optoelektronischen faser
FR3103043B1 (fr) 2019-11-08 2022-08-05 Primo1D Etiquette electronique d’identification comprenant un dispositif electronique d’identification filaire, procede de fabrication d’une telle etiquette et piece textile munie d’une telle etiquette.
EP3923195B1 (fr) 2020-06-11 2023-08-23 Primo1D Etiquette électronique présentant un caractère souple et déformable
FR3119944B1 (fr) 2021-02-15 2023-02-10 Primo1D Dispositif d'émission-réception radiofréquence utilisant une antenne composée d’un fil textile et d’un ruban conducteur et étiquette électronique associée
FR3131253B1 (fr) 2021-12-23 2024-01-05 Primo1D Pneumatique équipée d’un dispositif d'émission-réception radiofréquence
FR3134121B1 (fr) 2022-03-29 2024-05-03 Primo1D Pied-de-biche reglable pour machine a coudre pour l’insertion d’une etiquette electronique dans une couture de confection

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2323254A (en) * 1997-01-25 1998-09-16 Philip Noel Leonard Fibre Incorporating a Transponder
WO2002084617A1 (fr) * 2001-04-10 2002-10-24 Philip Noel Leonard Systemes electroniques incorpores dans des fils ou fibres textiles
WO2006123133A1 (fr) 2005-05-16 2006-11-23 The University Of Manchester Dispositifs fonctionnels installes dans des fils
GB2448122A (en) * 2007-02-02 2008-10-08 Darnbro Ltd Securing an RFID tag to a garment

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Publication number Priority date Publication date Assignee Title
US7253735B2 (en) * 2003-03-24 2007-08-07 Alien Technology Corporation RFID tags and processes for producing RFID tags

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2323254A (en) * 1997-01-25 1998-09-16 Philip Noel Leonard Fibre Incorporating a Transponder
WO2002084617A1 (fr) * 2001-04-10 2002-10-24 Philip Noel Leonard Systemes electroniques incorpores dans des fils ou fibres textiles
WO2006123133A1 (fr) 2005-05-16 2006-11-23 The University Of Manchester Dispositifs fonctionnels installes dans des fils
GB2448122A (en) * 2007-02-02 2008-10-08 Darnbro Ltd Securing an RFID tag to a garment

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10602932B2 (en) 2015-12-16 2020-03-31 Siren Care, Inc. System and method for detecting inflammation in a foot
US10638937B2 (en) 2015-12-16 2020-05-05 Siren Care, Inc. System and method for detecting inflammation in a foot
WO2018064174A1 (fr) 2016-09-27 2018-04-05 Siren Care, Inc. Fil intelligent et procédé de fabrication d'un fil contenant un dispositif électronique
US10480104B2 (en) 2016-09-27 2019-11-19 Siren Care, Inc. Smart yarn and method for manufacturing a yarn containing an electronic device
US10557220B2 (en) 2016-09-27 2020-02-11 Siren Care, Inc. Smart yarn and method for manufacturing a yarn containing an electronic device
US11447896B2 (en) 2016-09-27 2022-09-20 Siren Care, Inc. Smart yarn and method for manufacturing a yarn containing an electronic device
US11891730B2 (en) 2016-09-27 2024-02-06 Siren Care, Inc. Smart yarn and method for manufacturing a yarn containing an electronic device
CN107815807A (zh) * 2017-12-20 2018-03-20 广州市富元服装辅料有限公司 一种智能纱线封装机
US11109807B2 (en) 2018-12-14 2021-09-07 Siren Care, Inc. Sensing garment and method for making same
USD950400S1 (en) 2018-12-14 2022-05-03 Siren Care, Inc. Sensing garment
US11911180B2 (en) 2018-12-14 2024-02-27 Siren Care, Inc. Sensing garment and method for making same
CN111334912A (zh) * 2018-12-18 2020-06-26 任学勤 电磁智能纱线的生产方法

Also Published As

Publication number Publication date
GB0912674D0 (en) 2009-08-26
GB2472026A (en) 2011-01-26

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