EP0854018A1 - Reduced friction razor head - Google Patents
Reduced friction razor head Download PDFInfo
- 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
Links
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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.
Abstract
Description
It would therefore be desirable to provide a shaving aid which decreases the likelihood of a matrix having a high coefficient of friction with the skin surface being shaved.
Claims (22)
- A razor head comprising at least one blade and a blade housing comprising a skin engaging surface having a static coefficient of friction not greater than 0.20.
- A razor head according to claim 1 wherein said skin engaging surface has a static coefficient of friction not greater than 0.16.
- A razor head according to claim 1 wherein said skin engaging surface has a static coefficient of friction less than 0.10.
- A razor head according to claim 1 wherein said skin engaging surface is formed of a thermoplastic material comprising a lubricating agent selected from the group consisting of PTFE, silicone, and blends thereof.
- A razor head according to claim 1 wherein said skin engaging surface is formed of a thermoplastic material comprising PTFE and silicone.
- A razor head according to claim 1 further comprising a shaving aid comprising at least one material selected from the group consisting of a lubricating agent, a medicinal agent, a vitamin, a cosmetic agent, a coagulant, an astringent, a cleaning agent, a skin conditioner, and blends thereof.
- A razor head according to claim 1 wherein a non-skin engaging portion of said blade housing comprises a material having a static coefficient of friction greater than 0.25.
- A razor head according to claim 1 wherein said blade housing comprises at least two different low friction skin engaging portions which each have a static coefficient of friction not greater than 0.20.
- A razor head comprising at least one blade;a blade support comprising a skin engaging surface;a shaving aid connected to said blade housing;
wherein said skin engaging surface of said blade support has a static coefficient of friction not greater than 0.20. - A razor head according to claim 9 wherein said skin engaging surface has a static coefficient of friction not greater than 0.16.
- A razor head according to claim 9 wherein said skin engaging surface has a static coefficient of friction less than 0.10.
- A razor head according to claim 9 wherein said skin engaging surface is formed of a thermoplastic material comprising a lubricating agent selected from the group consisting of PTFE, silicone, and blends thereof.
- A razor head according to claim 9 wherein said skin engaging surface is formed of a thermoplastic material comprising PTFE and silicone.
- A razor head according to claim 13 wherein said shaving aid comprises a material selected from the group consisting of a lubricating agent, a medicinal agent, a vitamin, a cosmetic agent, a coagulant, an astringent, a cleaning agent, a skin conditioner, and blends thereof.
- A razor head according to claim 9 wherein said shaving aid comprises a material selected from the group consisting of a lubricating agent, a medicinal agent, a vitamin, a cosmetic agent, a coagulant, an astringent, a cleaning agent, a skin conditioner, and blends thereof.
- A razor head according to claim 9 wherein a non-skin engaging portion of said blade housing comprises a material having a static coefficient of friction greater than 0.25.
- A razor head comprising at least one blade and a shaving aid, said shaving aid comprising a water insoluble matrix comprising a material having a static coefficient of friction not greater than 0.20 and a water soluble active ingredient.
- A razor head according to claim 17 wherein said matrix material has a static coefficient of friction not greater than 0.16.
- A razor head according to claim 18 wherein said matrix material has a static coefficient of friction less than 0.10.
- A razor head according to claim 17 wherein said matrix material is formed of a thermoplastic material comprising a lubricating agent selected from the group consisting of PTFE, silicone, and blends thereof.
- A razor head according to claim 17 wherein said matrix material is formed of a thermoplastic material selected from the group consisting of PTFE, silicone, and blends thereof.
- A razor head according to claim 17 wherein said active ingredient is selected from the group consisting of a lubricating agent, a medicinal agent, a vitamin, a cosmetic agent, a coagulant, an astringent, a cleaning agent, a skin conditioner, and blends thereof.
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 (en) | 1998-07-22 |
EP0854018B1 EP0854018B1 (en) | 2003-10-15 |
Family
ID=25134939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98100720A Expired - Lifetime EP0854018B1 (en) | 1997-01-17 | 1998-01-16 | Reduced friction razor head |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0854018B1 (en) |
JP (1) | JPH10244084A (en) |
AU (1) | AU4764197A (en) |
CA (1) | CA2220443A1 (en) |
DE (1) | DE69818877T2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2805997A1 (en) * | 1998-02-25 | 2001-09-14 | Stuart Calwell | An aroma therapy delivering system for delivering scented fragrances comprises a shaving unit comprising a razor handle and head and a scent delivery package |
EP1023144B1 (en) * | 1997-10-15 | 2002-01-09 | Societe Bic, S.A. | Antichafing strip for shaving equipment head and shaving equipment head comprising same |
EP1551602A2 (en) * | 2002-08-21 | 2005-07-13 | Eveready Battery Company, Inc. | Razor having a microfluidic shaving aid delivery system and method of ejecting shaving aid |
Families Citing this family (3)
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 |
CA3181363A1 (en) * | 2020-05-20 | 2021-11-25 | The Gillette Company Llc | Exfoliation bar for shaving razor |
Citations (14)
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 (en) | 1993-07-09 | 1995-01-27 | Kaijirushi Hamono Kaihatsu Center:Kk | Razor with shaving aid |
Family Cites Families (1)
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 |
-
1997
- 1997-11-07 CA CA 2220443 patent/CA2220443A1/en not_active Abandoned
- 1997-12-09 AU AU47641/97A patent/AU4764197A/en not_active Abandoned
- 1997-12-12 JP JP34292197A patent/JPH10244084A/en active Pending
-
1998
- 1998-01-16 DE DE1998618877 patent/DE69818877T2/en not_active Expired - Lifetime
- 1998-01-16 EP EP98100720A patent/EP0854018B1/en not_active Expired - Lifetime
Patent Citations (15)
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 (en) | 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 (en) | 1993-07-09 | 1995-01-27 | Kaijirushi Hamono Kaihatsu Center:Kk | Razor with shaving aid |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1023144B1 (en) * | 1997-10-15 | 2002-01-09 | Societe Bic, S.A. | Antichafing strip for shaving equipment head and shaving equipment head comprising same |
FR2805997A1 (en) * | 1998-02-25 | 2001-09-14 | Stuart Calwell | An aroma therapy delivering system for delivering scented fragrances comprises a shaving unit comprising a razor handle and head and a scent delivery package |
EP1551602A2 (en) * | 2002-08-21 | 2005-07-13 | Eveready Battery Company, Inc. | Razor having a microfluidic shaving aid delivery system and method of ejecting shaving aid |
EP1551602A4 (en) * | 2002-08-21 | 2005-11-16 | Eveready Battery Inc | Razor having a microfluidic shaving aid delivery system and method of ejecting shaving aid |
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 |
Also Published As
Publication number | Publication date |
---|---|
AU4764197A (en) | 1998-07-23 |
JPH10244084A (en) | 1998-09-14 |
DE69818877D1 (en) | 2003-11-20 |
CA2220443A1 (en) | 1998-07-17 |
EP0854018B1 (en) | 2003-10-15 |
DE69818877T2 (en) | 2004-08-05 |
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