US3540491A - Method for making a plastic-jacketed hair clip - Google Patents

Method for making a plastic-jacketed hair clip Download PDF

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Publication number
US3540491A
US3540491A US531264A US3540491DA US3540491A US 3540491 A US3540491 A US 3540491A US 531264 A US531264 A US 531264A US 3540491D A US3540491D A US 3540491DA US 3540491 A US3540491 A US 3540491A
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United States
Prior art keywords
plastic
metal
wire
hair
coating
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Expired - Lifetime
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US531264A
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English (en)
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Nathan L Solomon
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F45/00—Wire-working in the manufacture of other particular articles
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D8/00—Hair-holding devices; Accessories therefor
    • A45D8/14—Hair grips, i.e. elastic single-piece two-limbed grips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
    • B21G3/00—Making pins, nails, or the like
    • B21G3/02—Making pins, nails, or the like of pins of the kind used in the tailoring trade or the house- hold
    • B21G3/04—Making pins, nails, or the like of pins of the kind used in the tailoring trade or the house- hold with locking or shielding device for the pin point, e.g. safety-pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands

Definitions

  • This invention relates to a hair clip or clasp for the hair, and more particularly relates to a bobbypin or clasp for the hair having a uniform thin plastic jacket completely encasing a metal strand and a method of encasing and hermetically sealing in plastic an elongated wire or similar strand of any crossscctional contour and to shape it and temper it into a hair clip, such as a bobbypin without damaging or marring the plastic jacket.
  • the wave-setting solutions widely used to form curls today are often corrosive to the metals used in the hair accessory items.
  • the cosmetic material and hair dye used in various sprays and treating solutions for the hair often adversely react with the metal of these hair clips causing discoloration of the metal and the hair.
  • Molded plastic hairpins have been used with limited success. While these all-plastic hair devices overcome many of the problems discussed above, they lacked springiness, flexibility and durability. To provide adequate strength, the molded plastic hair devices were made thicker and bulkier than the equivalent metal structure.
  • a further object of the present invention is to provide a resilient one-piece, formed strand ofwire completely jacketed with a tough plastic material, which will be long wearing and will not flake, chip or wear away during long use, always be attractive and will not snag the hair.
  • Another object of the present invention is to provide a method of uniformly jacketing with plastic an elongated wire or similar strand of material, having any cross-sectional contour, shaping the jacketed strand into a clasp for the hair, such as a bobbypin, and heat treating the jacketed clasp to give the clasp its desired resilient properties.
  • Another object of the present invention is to provide a plastic jacketed bobbypin or the like for the hair that accomplishes all of the above and yet is inexpensive to fabricate, durable in use, pleasing to the eyes, reliable in operation, having permanent colors and a long life.
  • FIG. I is a diagrammatic side elevational view of an apparatus suitable for carrying out the method of the invention.
  • FIG. 2 is a diagrammatic side elevational view of the apparatus for conveying the formed pins through various operations'
  • PK]. 3 is an enlarged front elevational view of a bobbypin. produced according to the invention.
  • H6. 4 is a transverse cross-sectional view taken along line 4-4 of FIG. 3.
  • a thin uniform plastic jacket is applied to a wire strand. if the plastic jacket is too thick or is uneven in thickness, it will not form properly during the forming operations, or give a satisfactory appearance to the purchaser. During the crimping and bending operations a thick plastic layer will be marred by these forming operationsand form an uneven unattractive surface. Additionally, too thick of a jacket prevents good adhesion of the plastic to the metal strand, as well as being costly. Also, a thick coating results in uneven tempering of the wire by reason of the plastic coating reducing the heat transmitted to the metal through the plastic as the jacketed wire passes through a heating section.
  • a'thin coating refers to a layer ofplastic on a side of a metal strand in the range of about .00l to .0055 inches. The layer must be uniform within the range of plus or minus .OOl of an inch.
  • a jacketed strand that provides good results has a metal strip of about .022 inch thickness and the jacketed strand has an outside measurement of about .0275 inches.
  • the new method comprises feeding an endless strand of filament through a cleaning station, passing the treated filament through an extrusion die, through which is continuously forced a plastic material, so that the plastic material is formed about the filament.
  • the jacket is cooled and the jacketed filament is formed, cut to a predetermined length and bent into shape, its ends are coated and the formed wire is heated to a predetermined degree for tempering the metal strand.
  • the finished product could be packaged or collected in any conventional manner.
  • FIG. 1 illustrates the general or rangement of the various mechanisms and apparatus for producing a wire form item coated with a uniform thin coating of plastic and formed into a hair clip ll illustrated in FIG. 3.
  • a continuous wireclement 10 is fed from a source of wire 12.
  • Source 12 is shown as a payout reel rotatably mounted about a shaft 14.
  • Wire 10 has any desired cross-sectional configuration.
  • wire 10 is straightened 3 heating station 17 the cleaned wire is fed into an extruder 18 having a suitable die 20, shaped to provide the desired finished size of the arms of the hair pins.
  • the inlet of extruder 18 into which wire the is "fed is coaxial with the extruder head l9, which contains the extruder orifice.
  • a hard plastic material such as nylon, is formed from the barrel of the extruder 18 under pressure through die orifice 20 longitudinally about wire at the outlet end of extruder head 19.
  • the plastic is formed about wire 10 as a covering or a jacket 24, having uniform outer dimensions.
  • the outer dimensions of die orifice 20 are smaller than the outer dimensions of the coated wire.
  • the speed of travel of wire 10 from die orifice 20 allows the coating 24 to enlarge in size a controlled amount after passing from die orifice 20, which provides a dimensionally constant-thickness of the coating.
  • the hot plastic coating is cooled prior to further handling to avoid distortion or disturbing the coating.
  • the hot plastic coating 24 is cooled by passing through a cooling station 26, which has cooling fluid therein, which would be either water or air.
  • the plastic coated wire upon leaving cooling station 26 is safe to handle and be worked.
  • the coated wire leaving cooling station 26 is driven or moved forward by a pair of driving wheels 28 rotating in the direction as shown. If desired, a capstan may also be used.
  • the plastic coated wire, indicated at 29, passes from driving wheels 28 into a forming operation.
  • wire 29 is fed into a crimping'apparatus 30 for forming in the wire the proper corrugations, or multiple wave 31, shown in bobbypin ll in HO. 3.
  • a cutoff tool trims the wire to a predetermined length and kicks up one end.
  • the crimping, cutoff and kickup is formed in one operation, shown as mechanism 30.
  • the formed wire forms, shown as 32, are fed from apparatus 30 into the final bending and forming unit 33 directly above a forming pin 34. Arranged beneath pin 34 is a carrier or band 35.
  • Forming unit 33 bends wire form 32 about pin 34 and strips form 32 from pin 34 onto band 35, which conveys forms 32 onto the following operation.
  • the spacing of forms 32 thereon can be varied.
  • the bending of form 32 is accomplished by a pair of arms 38 moving towards each other and forcing the ends of form 32 towards each other. Pin'34 aids in maintaining its corresponding wire form 32 against displacement.
  • arms v38 return to their initial position ready to receive their next workpiece.
  • the crimping, cutoff and bending operations result in a bobbypin 11, described above. This operation is continued to repeat the forming operations.
  • the wire forms are formed into bobbypins, they are positioned on band and conveyed or carried through a dipping process, indicated-at 40, for coating or covering their exposed ends.
  • the ends have metal exposed due to the trimming operation.
  • the ends can be covered by spraying with a plastic, if desired.
  • Advantagcously, the end-covering material is a plastisol, which is compatible with the plastic used for the coating, so as to form a complete plastic jacket.
  • the jacketed bobbypins are then conveyed through a heater 42 where the coated ends are cured and the metal core is tempered to provide the resiliency and spring necessary for the bobbypin to operate properly.
  • the metal strand would not have a uniform temper, so that portions with a thicker plastic coating would be less resilient than those portions of the metal having a thinner coating.
  • the steel is hardened too much by the coating being too thin, the metal would be too brittle and would snap in use, when expanded or stretched for inserting hair.
  • the formed and jacketed hairpins are assembled in groups having a predetermined number of pins by mechanism 43, which bunches the pins in groups of 10, as shown.
  • Mechanism 43 moves towards band 35 to hold the pins 11 thereon until a predetermined number are bunched, then moves away, so as to allow bunched pins 11 to move on.
  • the band 35 continues its forward movement all ofthis time.
  • FIG. 3 having a pair of arms 48 and 50 with corrugations 31 along one arm 50, and being bent about portion 52. Arms 48 and 50 can be fle'xed many times with no harm to, or separation of, the coating 24 on the metal strand.
  • the end of arm 50 has a kickup 54, which aids in receiving hair between arms 48 and 50.
  • the free ends of arms 48 and 50 are coated, as at 56 and 58, respectively.
  • Any plastic material for applying coating 24 may be used, which forms a tough, resilient, formable coating, and which has high resistance to deformation and chemicals, and has good properties of aging, light fastness and weathering.
  • Some examples are .nylons, polycarbonates, fluorocarbons and acetal resins.
  • the speed of the forming and bending apparatus 30 and 33 is synchronized to the lineal speed of the coated filament l0 delivered from extruder 18 by feed wheels 28.
  • the uniform spacing of the formed pin on hand 35 is controlled by the relative speeds of band 35 and the speed of pins leaving bending apparatus 33.
  • FIGS. 1 and 2 While a continuous coating and fabricating operation is shown in FIGS. 1 and 2, if desired, it can be done in several operations, namely taking up the coated wire on spools and retransferring the wire onto citherlarger or smaller spools for feeding through the forming and tempering operations. Also, the plastic when fed into the extruder can have various additional ingredients added for providing various colors and effccts.
  • Employing the method and apparatus of the present invention provides a uniform thin coating ona metal strand, which falls within the range of about .00! to about .0055 inches on a side and controls closely the outer dimensions of the jacketed wire of any cross-sectional configuration.
  • This thin coating can be mechanically formed, such as by corrugating and bentling, without breaking or separating the coating, or marring its smooth surface, and the metal strand then tempered within its jacket to provide the desired degree of springiness and flexibility. No metal is exposed to the chemicals used in hair sprays, or touches the scalp or hair of the user.
  • the method of making a plastic jacketed bobbypin which comprises cleaning a strip of metal, applying a tough rigid plastic continuously about said strip, passing said strip with said plastic through a die to form a thin, continuous, uniform plastic coat about said metal strip, cooling said plastic coating, crimping a portion of said coated metal strip to form multiple waves, trimming said strip to a predetermined length including said crimped portion, bending said length into a substantially U-shaped form having a pair of arms, coating the free end of each of said arms with a plastic material compatible with said first-mentioned plastic for hermetically sealing the entire metal strip, heating said formed strip at a temperature to temper the metal without decomposing said plastic jacket to provide springiness of the arms.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Wire Processing (AREA)
US531264A 1966-02-03 1966-03-02 Method for making a plastic-jacketed hair clip Expired - Lifetime US3540491A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US53126466A 1966-02-03 1966-02-03

Publications (1)

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US3540491A true US3540491A (en) 1970-11-17

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Application Number Title Priority Date Filing Date
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Country Status (4)

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US (1) US3540491A (en, 2012)
BE (1) BE686009A (en, 2012)
FR (1) FR1496561A (en, 2012)
GB (1) GB1143639A (en, 2012)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915203A (en) * 1970-11-23 1975-10-28 Solo Products Corp Plastic-jacketed article and method of making the same
USD347295S (en) 1992-01-31 1994-05-24 Mccabe David J Hair pin
US5735295A (en) * 1996-10-21 1998-04-07 Sammon; Sheila A. Hair adornment having hair clip
US5996593A (en) * 1997-07-16 1999-12-07 Horman; Heidi Christine Hair clip
USD464171S1 (en) 2002-03-15 2002-10-08 Shelley D Goodman Hair pin
US6460547B1 (en) 2001-10-26 2002-10-08 Sheila M. Williams Hair pin
US20050109362A1 (en) * 2002-06-04 2005-05-26 L&N Sales And Marketing, Inc. Hair clip
ES2257887A1 (es) * 2001-06-22 2006-08-01 Jorge Feliu De La Peña Casseras Procedimiento de fabricacion de horquillas-clip para la sujecion del cabello.
USD702399S1 (en) * 2012-10-15 2014-04-08 Teresa G. Mosley Hair pin
US20140096789A1 (en) * 2012-10-09 2014-04-10 Elena Caruso Frenchies - flocked french hairpins
US20150230578A1 (en) * 2014-02-14 2015-08-20 Tung Hing Plastic Manufactory Ltd. Hair clipping device
US9974372B1 (en) 2017-05-31 2018-05-22 Colleen M. Lohse Hairpin
US10226811B2 (en) 2014-02-14 2019-03-12 Tung Hing Plastic Manufactory Ltd. Hair clipping device

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915203A (en) * 1970-11-23 1975-10-28 Solo Products Corp Plastic-jacketed article and method of making the same
USD347295S (en) 1992-01-31 1994-05-24 Mccabe David J Hair pin
US5735295A (en) * 1996-10-21 1998-04-07 Sammon; Sheila A. Hair adornment having hair clip
US5996593A (en) * 1997-07-16 1999-12-07 Horman; Heidi Christine Hair clip
ES2257887B1 (es) * 2001-06-22 2007-12-01 Jorge Feliu De La Peña Casseras Procedimiento de fabricacion de horquillas-clip para la sujecion del cabello.
ES2257887A1 (es) * 2001-06-22 2006-08-01 Jorge Feliu De La Peña Casseras Procedimiento de fabricacion de horquillas-clip para la sujecion del cabello.
US6460547B1 (en) 2001-10-26 2002-10-08 Sheila M. Williams Hair pin
USD464171S1 (en) 2002-03-15 2002-10-08 Shelley D Goodman Hair pin
US20050109362A1 (en) * 2002-06-04 2005-05-26 L&N Sales And Marketing, Inc. Hair clip
US20140096789A1 (en) * 2012-10-09 2014-04-10 Elena Caruso Frenchies - flocked french hairpins
USD702399S1 (en) * 2012-10-15 2014-04-08 Teresa G. Mosley Hair pin
US20150230578A1 (en) * 2014-02-14 2015-08-20 Tung Hing Plastic Manufactory Ltd. Hair clipping device
US9642431B2 (en) * 2014-02-14 2017-05-09 Tung Hing Plastic Manufactory Ltd. Hair clipping device
US10226811B2 (en) 2014-02-14 2019-03-12 Tung Hing Plastic Manufactory Ltd. Hair clipping device
US9974372B1 (en) 2017-05-31 2018-05-22 Colleen M. Lohse Hairpin

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Publication number Publication date
BE686009A (en, 2012) 1967-02-27
GB1143639A (en, 2012) 1900-01-01
FR1496561A (fr) 1967-09-29

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