EP0011452A1 - Procédé de fabrication de rasoirs et rasoir obtenu par ce procédé - Google Patents

Procédé de fabrication de rasoirs et rasoir obtenu par ce procédé Download PDF

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Publication number
EP0011452A1
EP0011452A1 EP79302515A EP79302515A EP0011452A1 EP 0011452 A1 EP0011452 A1 EP 0011452A1 EP 79302515 A EP79302515 A EP 79302515A EP 79302515 A EP79302515 A EP 79302515A EP 0011452 A1 EP0011452 A1 EP 0011452A1
Authority
EP
European Patent Office
Prior art keywords
blade member
die
blade
support member
hole
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.)
Granted
Application number
EP79302515A
Other languages
German (de)
English (en)
Other versions
EP0011452B1 (fr
Inventor
John Frederick Francis
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.)
Gillette Co LLC
Original Assignee
Gillette Co LLC
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 Gillette Co LLC filed Critical Gillette Co LLC
Publication of EP0011452A1 publication Critical patent/EP0011452A1/fr
Application granted granted Critical
Publication of EP0011452B1 publication Critical patent/EP0011452B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/40—Details or accessories
    • B26B21/4068—Mounting devices; Manufacture of razors or cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/54—Razor-blades

Definitions

  • This invention relates to the manufacture of razors, and more particularly to a method of permanently attaching a blade member to a support.
  • Welding has the disadvantage that the heat necessarily generated alters the metallurgical structure of the blade member around the weld zone and thereby introduces the risk of corrosion of the blade member.
  • the formation of holes in the blade member involves additional complications in manufacture of the blade member.
  • the present invention provides a method of attachment which avoids the above stated disadvantages and which permits a wide variety of materials, metallic and non-metallic to be employed for the support member.
  • a method of attaching a razor blade member to a support member of cold deformable material in which the blade member has one surface contacted by a die having at least one die-hole in its blade supporting surface, and the support member is placed against the opposite surface of the blade member and is subjected, by a punch, to compressive forces sufficient to effect cold deformation of the support member, causing it to pierce and extrude through the blade member into the die-hole, the material thus extruded through the blade member subsequently being riveted over to secure the members together.
  • the method of the invention thus avoids the risk of metallurgical degradation inherent in welding techniques.
  • the conventionalrivetting techniques mentioned above involve the provisions of pre-formed holes in the blade member, and pre-formed projections (rivets) on the support member, which must be accurately aligned with the blade member holes and accurately controlled in their cross-section to produce a good fit in the holes. These complications are avoided by the method of the invention since the extruded projections make their own holes in the blade member. Furthermore, it is possible to produce 'rivet.' diameters and holes smaller than would normally be possible in the case of pre-formed holes formed by conventional mass production techniques.
  • a narrow, imperforate blade member 1 is formed by an imperforate strip of hardened stainless steel sharpened-b a cutting edge at 2, and is to be attached to a blade support 3 of wire-like form, and of somewhat narrower width than the blade member 1.
  • the support 3 may, for example, be of aluminium or aluminium alloy, steel, brass or synthetic plastics material, such as polyester.
  • the press tool comprises a die 4having a shallow recess 5 to receive the blade member, and is formed with a number of through holes 6, spaced apart longitudinally of the blade member, and opening into the main surface of the recess against which the blade member is supported.
  • the tool also comprises a platen 7 having a rectangular slot 8 to locate and confine the support member, and a ram 9 which is a close fit in the slot 8.
  • the inner surface of the ram is shown here as having a head portion 11 of lesser width than the remainder of the ram, since it is desired to form a channel at the underside of the support member, but the head portion could take other forms.
  • the ram With the blade member and support member located as shown in Figure 1, the ram is advanced to apply high compressive forces to the support member to effect plastic deformation thereof.
  • the "hydrostatic pressures" thus generated in the support material cause it to pierce the blade strips at its unsupported points opposite the holes 6 and to be extruded through the blade member, a slug 1A of the blade material being punched out and carried upwardly by the extruded material,as illustrated at 12 in Figure 2.
  • the partially completed assembly is removed from the press tool leaving the slug of blade material in the die hole, and the extruded pips 12 are then riveted over to form retaining heads 13, as shown in Figure 3, to complete the assembly.
  • the blade member has an overall length of 38 mm, a width of 1.15 mm and is 0.038 mm thick, and the die has 18 holes equally spaced apart, each hole being of 0.25 mm diameter.
  • a single punch operates over substantially the whole of the undersurface of the support 3. In this case it will usually be necessary to confine closely the longitudinal side edges of the support material so as to prevent lateral deformation thereof.
  • the punch 31 is formed with discrete punch portions formed by cylindrical pins 32, each aligned with a respective die hole 6. Lateral support for the pins is provided by a pressure pad 33 through which the pins slide during the piercing and extruding operation.
  • the pins 32 are of larger diameter than the die holes with which they co-operate.
  • support materials having a hardness of 100 VPN or more.
  • Units thus formed can be assembled into razor heads of metal or plastics material having a separately formed guard, or the support member may be an integral part of such a razor head.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Forging (AREA)
  • Punching Or Piercing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Insertion Pins And Rivets (AREA)
EP19790302515 1978-11-10 1979-11-09 Procédé de fabrication de rasoirs et rasoir obtenu par ce procédé Expired EP0011452B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4410978 1978-11-10
GB7844109 1978-11-10

Publications (2)

Publication Number Publication Date
EP0011452A1 true EP0011452A1 (fr) 1980-05-28
EP0011452B1 EP0011452B1 (fr) 1982-12-15

Family

ID=10500964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790302515 Expired EP0011452B1 (fr) 1978-11-10 1979-11-09 Procédé de fabrication de rasoirs et rasoir obtenu par ce procédé

Country Status (7)

Country Link
EP (1) EP0011452B1 (fr)
JP (1) JPS5570427A (fr)
AR (1) AR218786A1 (fr)
BR (1) BR7907290A (fr)
DE (1) DE2964309D1 (fr)
ES (1) ES485771A1 (fr)
GR (1) GR73601B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3229254A1 (de) * 1981-08-24 1983-03-03 The Gillette Co., 02199 Boston, Mass. Verfahren zum herstellen von rasierklingeneinheiten
WO2005090024A3 (fr) * 2004-03-11 2006-08-03 Gillette Co Elements coupants pour rasoirs avec lames multiples

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1065933A (en) * 1965-03-02 1967-04-19 Eversharp Inc Laminated razor blade for injector razor
GB1327381A (en) * 1969-09-27 1973-08-22 Tolwood Multifasteners Nut and panel assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1065933A (en) * 1965-03-02 1967-04-19 Eversharp Inc Laminated razor blade for injector razor
GB1327381A (en) * 1969-09-27 1973-08-22 Tolwood Multifasteners Nut and panel assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3229254A1 (de) * 1981-08-24 1983-03-03 The Gillette Co., 02199 Boston, Mass. Verfahren zum herstellen von rasierklingeneinheiten
WO2005090024A3 (fr) * 2004-03-11 2006-08-03 Gillette Co Elements coupants pour rasoirs avec lames multiples

Also Published As

Publication number Publication date
AR218786A1 (es) 1980-06-30
BR7907290A (pt) 1980-07-08
GR73601B (fr) 1984-03-26
ES485771A1 (es) 1980-07-01
JPS5570427A (en) 1980-05-27
EP0011452B1 (fr) 1982-12-15
DE2964309D1 (en) 1983-01-20

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