EP0854018A1 - Rasierkopf mit verringerter Reibung - Google Patents

Rasierkopf mit verringerter Reibung Download PDF

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Publication number
EP0854018A1
EP0854018A1 EP98100720A EP98100720A EP0854018A1 EP 0854018 A1 EP0854018 A1 EP 0854018A1 EP 98100720 A EP98100720 A EP 98100720A EP 98100720 A EP98100720 A EP 98100720A EP 0854018 A1 EP0854018 A1 EP 0854018A1
Authority
EP
European Patent Office
Prior art keywords
razor head
friction
head according
agent
static coefficient
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
EP98100720A
Other languages
English (en)
French (fr)
Other versions
EP0854018B1 (de
Inventor
Fred Charles Wexler
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.)
Warner Lambert Co LLC
Original Assignee
Warner Lambert 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 Warner Lambert Co LLC filed Critical Warner Lambert Co LLC
Publication of EP0854018A1 publication Critical patent/EP0854018A1/de
Application granted granted Critical
Publication of EP0854018B1 publication Critical patent/EP0854018B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B26B21/4012—Housing details, e.g. for cartridges
    • 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
    • B26B21/44—Means integral with, or attached to, the razor for storing shaving-cream, styptic, or the like
    • B26B21/443—Lubricating strips attached to the razor head

Definitions

  • the present invention is directed to wet shaving systems and, more particularly, to shaving systems comprising skin engaging surfaces and shaving aids having reduced friction.
  • U.S. Patent No. 4,170,821 to Booth discloses a shaving aid connected to a razor head wherein a water soluble active ingredient is released from an insoluble matrix during shaving.
  • U.S. Patent No. 4,291,463 to Williams discloses a solid, water soluble lubricating shaving aid which is coated onto a razor blade.
  • U.S. Patent No. 3,071,856 to Fischbein discloses blade edge coatings of polymeric materials such as polytetraflouroethylene (PTFE), U.S. Patent No.
  • Figure 1 is a perspective view of one embodiment of the present invention.
  • Various embodiments of the present invention comprise razor heads having a blade housing with a skin-engaging surface having a static coefficient of friction not greater than 0.20.
  • the low-friction skin-engaging surfaces of the present invention are not subject to depletion of active ingredients after repeated shaves in the same manner as the water-soluble active ingredients disclosed in the above-referenced patent to Booth.
  • the amount of water-soluble material delivered to the skin's surface can be reduced thereby diminishing the benefit to the shaver.
  • a consumer is more likely to come in contact with the higher friction water-insoluble matrix.
  • Another aspect of the present invention comprises a shaving aid with a water-insoluble matrix formed of a material having reduced friction.
  • a razor head has a blade housing with a skin-engaging surface having a static coefficient of friction not greater than 0.20 and a shaving aid.
  • razor heads having surface areas with reduced friction in order to provide a more comfortable shave.
  • razor heads comprise a skin-engaging surface having a static coefficient of friction which is not greater than 0.20, preferably not greater than 0.16, and most preferably less than 0.10 when measured at 40 psi and ambient temperature.
  • the low friction skin-engaging surface is preferably provided on a cap member, guard element and/or the skin-engaging portions of sidewalls.
  • One embodiment of the present invention is in the form of a razor head, illustrated in Figure 1, and comprises a cap 10, guard element 20, blades 25, upper side walls 30, base 40 and shaving aid 50.
  • cap member 10, guard 20 and the upper skin-engaging side wall portions 30 are formed of a low-friction material.
  • These low friction materials have a static coefficient of friction which is not greater than 0.20, preferably not greater than 0.16, and most preferably less than 0.10 when measured at 40 psi and ambient temperature. Since some low-friction materials are more costly than thermoplastics commonly used in the blade housings of razor heads, in this illustrated embodiment the base 40 is formed of a less expensive material, e.g. polypropylene or polystyrene, which have a higher coefficient of friction.
  • the higher coefficient of friction base 40 facilitates handling while loading and unloading the cartridge onto a razor and can also help to maintain the cartridge on the razor during shaving.
  • the use of a different material is not required, however, in order to obtain the advantages of the present invention.
  • materials that are chemically compatible when different materials are being used. Therefore, if a base having a higher coefficient of friction is being sequentially molded with a lower coefficient of friction cap member, the materials will preferably exhibit suitable chemical compatibility to form any needed bonds. If the shaving elements are being formed separately and subsequently connected using an adhesive or mechanical anchors, then chemical compatibility is less important.
  • the term "razor head" is intended to include shaving cartridges designed for attachment to a separate razor, as well as the operative skin-engaging portion of a shaving system wherein a handle is integrally formed with the blade support structure.
  • a cap member can be formed of a first low-friction material and a guard element can be formed of a different low-friction material in order to optimize the comfort of a shave.
  • a shaving aid is formed of a water-insoluble low-friction matrix and a water-soluble active ingredient which is exuded from the shaving aid during shaving.
  • the use of a low-friction water-insoluble matrix is designed to provide a longer lasting comfortable shave life to the razor head even after the water-soluble component(s) has been substantially depleted. Therefore, by utilizing a low-friction water-insoluble matrix, the loss of active ingredient, e.g. friction-reducing water-soluble active ingredient, in a shaving aid can be offset by the reduced friction characteristics of the matrix. Furthermore, the reduced friction attribute of the matrix complements the water-soluble component resulting in an overall lower friction component than is currently available.
  • the use of a low friction water-insoluble matrix may advantageously permit more of the water-soluble material to exude during shaving, thereby increasing the efficiency of the delivery of the water-soluble component(s).
  • low friction materials are used to indicate materials having a static coefficient of friction which is not greater than 0.20 when measured at 40 psi and ambient temperature. Preferred low friction materials have static coefficients of friction which are not greater than 0.16 and most preferred low friction materials have coefficients of friction less than 0.10.
  • suitable thermoplastic materials include both crystalline and amorphous engineering thermoplastics, particularly those employing lubricating agents such as PTFE, silicone, other lubricating agents, either alone or in combination.
  • shaving aid refers to the active ingredient combined within a delivery system, such as a water-insoluble micro-porous matrix structure.
  • Previously suggested active ingredients include those disclosed in U.S. Patent No. 4,170,821 to Booth, which is hereby incorporated by reference.
  • a shaving aid may comprise one or various combinations of the following:
  • active ingredients may include various pigments, e.g., titanium dioxide, fragrances, aloe vera, flavoring agents, mineral oils, essential oils and other oils derived from plants.
  • the shaving aids of the present invention may also comprise other compounds or blends of compounds such as water-insoluble polymers such as polystyrene and polypropylene.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cosmetics (AREA)
EP98100720A 1997-01-17 1998-01-16 Rasierkopf mit verringerter Reibung Expired - Lifetime EP0854018B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US78526697A 1997-01-17 1997-01-17
US785266 1997-01-17

Publications (2)

Publication Number Publication Date
EP0854018A1 true EP0854018A1 (de) 1998-07-22
EP0854018B1 EP0854018B1 (de) 2003-10-15

Family

ID=25134939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98100720A Expired - Lifetime EP0854018B1 (de) 1997-01-17 1998-01-16 Rasierkopf mit verringerter Reibung

Country Status (5)

Country Link
EP (1) EP0854018B1 (de)
JP (1) JPH10244084A (de)
AU (1) AU4764197A (de)
CA (1) CA2220443A1 (de)
DE (1) DE69818877T2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2805997A1 (fr) * 1998-02-25 2001-09-14 Stuart Calwell Procede et systeme de distribution pour therapie aromatique
EP1023144B1 (de) * 1997-10-15 2002-01-09 Societe Bic, S.A. Extrudierter antireibungsstreifen für rasierkopf und rasierkopf mit einem derartigen streifen
EP1551602A4 (de) * 2002-08-21 2005-11-16 Eveready Battery Inc Rasierer mit einem mikrofluidrasierhilfenzufuhrsystem und verfahren zum auswurf der rasierhilfe
US12605856B2 (en) 2020-07-31 2026-04-21 Koninklijke Philips N.V. Tactile wear indicator for a cutting element

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6868610B2 (en) * 2001-11-15 2005-03-22 The Gillette Company Shaving razors and razor cartridges
GB0520931D0 (en) * 2005-10-14 2005-11-23 Reckitt Benckiser Uk Ltd Improvements in or relating to compositions
EP4534261B1 (de) * 2020-05-20 2026-02-25 The Gillette Company LLC Peelingstange für rasierer
USD965887S1 (en) 2020-05-20 2022-10-04 The Gillette Company Llc Shaving razor guard bar

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2292417A (en) 1939-02-01 1942-08-11 Richard F Grant Razor blade
US2937976A (en) 1958-11-25 1960-05-24 Gillette Co Organosiloxane gel coated razor blade
US3071856A (en) 1959-12-31 1963-01-08 Irwin W Fischbein Razor blade and method of making same
US4044120A (en) 1974-04-17 1977-08-23 Wilkinson Sword Limited Compounds having a physiological cooling effect, and compositions containing them
US4170821A (en) 1977-12-02 1979-10-16 Warner-Lambert Company Razor cartridges
US4291463A (en) 1979-12-31 1981-09-29 Warner-Lambert Company Water-soluble shaving aid for razor blades
GB2183523A (en) * 1985-10-15 1987-06-10 Wilkinson Sword Ltd Razors and razor cartridges
US4872263A (en) * 1988-09-30 1989-10-10 The Kendall Company Lubricating device
US4875287A (en) * 1986-11-14 1989-10-24 Hydromer, Inc. Shaving articles lubricious when wet and compositions therefor
US4914817A (en) 1988-07-01 1990-04-10 The Gillette Company Razor head with riblets
US5001832A (en) * 1987-08-25 1991-03-26 Wilkinson Sword Gmbh Razor blade unit
US5056221A (en) 1987-12-19 1991-10-15 Wilkinson Sword Gmbh Razor and process for manufacturing a surface of low frictional resistance on a razor
US5095619A (en) 1990-09-28 1992-03-17 The Gillette Company Shaving system
JPH0724156A (ja) 1993-07-09 1995-01-27 Kaijirushi Hamono Kaihatsu Center:Kk シェービングエイド付き剃刀

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5388331A (en) * 1994-01-28 1995-02-14 Doroodian-Shoja Siamak Wear indicator for a disposable razor

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2292417A (en) 1939-02-01 1942-08-11 Richard F Grant Razor blade
US2937976A (en) 1958-11-25 1960-05-24 Gillette Co Organosiloxane gel coated razor blade
US3071856A (en) 1959-12-31 1963-01-08 Irwin W Fischbein Razor blade and method of making same
US4044120A (en) 1974-04-17 1977-08-23 Wilkinson Sword Limited Compounds having a physiological cooling effect, and compositions containing them
US4170821B1 (de) 1977-12-02 1992-10-20 Warner Lambert Co
US4170821A (en) 1977-12-02 1979-10-16 Warner-Lambert Company Razor cartridges
US4291463A (en) 1979-12-31 1981-09-29 Warner-Lambert Company Water-soluble shaving aid for razor blades
GB2183523A (en) * 1985-10-15 1987-06-10 Wilkinson Sword Ltd Razors and razor cartridges
US4875287A (en) * 1986-11-14 1989-10-24 Hydromer, Inc. Shaving articles lubricious when wet and compositions therefor
US5001832A (en) * 1987-08-25 1991-03-26 Wilkinson Sword Gmbh Razor blade unit
US5056221A (en) 1987-12-19 1991-10-15 Wilkinson Sword Gmbh Razor and process for manufacturing a surface of low frictional resistance on a razor
US4914817A (en) 1988-07-01 1990-04-10 The Gillette Company Razor head with riblets
US4872263A (en) * 1988-09-30 1989-10-10 The Kendall Company Lubricating device
US5095619A (en) 1990-09-28 1992-03-17 The Gillette Company Shaving system
JPH0724156A (ja) 1993-07-09 1995-01-27 Kaijirushi Hamono Kaihatsu Center:Kk シェービングエイド付き剃刀

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1023144B1 (de) * 1997-10-15 2002-01-09 Societe Bic, S.A. Extrudierter antireibungsstreifen für rasierkopf und rasierkopf mit einem derartigen streifen
FR2805997A1 (fr) * 1998-02-25 2001-09-14 Stuart Calwell Procede et systeme de distribution pour therapie aromatique
EP1551602A4 (de) * 2002-08-21 2005-11-16 Eveready Battery Inc Rasierer mit einem mikrofluidrasierhilfenzufuhrsystem und verfahren zum auswurf der rasierhilfe
US7103977B2 (en) 2002-08-21 2006-09-12 Eveready Battery Company, Inc. Razor having a microfluidic shaving aid delivery system and method of ejecting shaving aid
US12605856B2 (en) 2020-07-31 2026-04-21 Koninklijke Philips N.V. Tactile wear indicator for a cutting element

Also Published As

Publication number Publication date
DE69818877D1 (de) 2003-11-20
DE69818877T2 (de) 2004-08-05
JPH10244084A (ja) 1998-09-14
CA2220443A1 (en) 1998-07-17
AU4764197A (en) 1998-07-23
EP0854018B1 (de) 2003-10-15

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