EP0563618A1 - Tête de rasage pour rasoir mécanique - Google Patents

Tête de rasage pour rasoir mécanique Download PDF

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Publication number
EP0563618A1
EP0563618A1 EP93103623A EP93103623A EP0563618A1 EP 0563618 A1 EP0563618 A1 EP 0563618A1 EP 93103623 A EP93103623 A EP 93103623A EP 93103623 A EP93103623 A EP 93103623A EP 0563618 A1 EP0563618 A1 EP 0563618A1
Authority
EP
European Patent Office
Prior art keywords
head according
razor head
projections
razor
protective strip
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
EP93103623A
Other languages
German (de)
English (en)
Other versions
EP0563618B1 (fr
Inventor
Wolfgang Althaus
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.)
Wilkinson Sword GmbH
Original Assignee
Wilkinson Sword GmbH
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 Wilkinson Sword GmbH filed Critical Wilkinson Sword GmbH
Publication of EP0563618A1 publication Critical patent/EP0563618A1/fr
Application granted granted Critical
Publication of EP0563618B1 publication Critical patent/EP0563618B1/fr
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
    • B26B21/4018—Guard elements
    • 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
    • B26B21/4031—Housing details, e.g. for cartridges characterised by special geometric shaving parameters, e.g. blade span or exposure

Definitions

  • the invention relates to a razor head, in particular a razor blade unit, which is arranged at the front end of a handle, wherein the razor blade unit is designed as a single or double razor blade and is fixed in a plastic body and in the region of the top of the razor head, which is a surface for attacking the skin of the user forms, comb-like projections are arranged, which extends to the cutting edge (s) of the blade unit (s).
  • a razor head which carries the single or double razor blade, is arranged at the front end of a handle.
  • the razor head can be integrally formed with the handle in the form of a molded plastic part. If the razor head is designed separately from the handle and can be exchangeably attached to it by means of a corresponding mechanism, one speaks of a so-called razor blade unit, in which a single or double razor blade is embedded in a plastic housing so that it cannot be detached.
  • a razor head in the form of such a razor blade unit is disclosed in EP 0 389 007.
  • a wire with a number of adjacent turns is wound around the plastic body in which the double razor blade is embedded.
  • the individual turns extend at a distance from one another and parallel to the shaving direction, while the turns extend on the underside of the plastic body at an angle thereto.
  • This characteristic winding protective wire improves the shaving characteristics.
  • the wire prevents, for example, the formation of wrinkles or swelling of the skin, so that injuries to the skin can also be prevented in areas which are not perceptible to the eye.
  • the wire prevents the actual shaving resistance because it reduces the frictional forces.
  • the protective wire prevents the user from accidentally cutting himself on the razor blades if he improperly handles the razor blade unit.
  • the invention has for its object to provide a razor head, in particular a razor blade unit of a wet shaver of the type mentioned, which offers a high level of safety for the user, the frictional resistance is very low and the blade unit is easy to manufacture.
  • At least one, the protective strip or the upper cover cap has at least two comb-like projections.
  • These protrusions have an effect similar to that of the wire strands in that the bulging of the cutting edge at the location of the protrusion is reduced, thereby reducing the risk of cutting too short, which causes reddening of the skin or even notches and bleeding.
  • a double razor blade it is proposed in a further development that the two razor blades are attached to this on both sides of a spacer arranged therebetween, the razor blade / spacer / razor blade unit thus formed being used essentially from above on a platform or a supporting unit of the plastic body is.
  • the spacer has comb-like projections that extend toward the cutting edges of the blades.
  • the protective strip and the blade platform form a lower plastic part connected via side walls.
  • the razor blade / spacer / razor blade unit is arranged and fixed in the lower part by means of indentations in the side walls.
  • the top cap is then placed on the blades from above and secured to the lower plastic part by interlocking or in any other suitable manner.
  • the parts of the protective strip, the spacer and the upper cover cap all had comb-like projections which are aligned with one another and form a protection for the skin.
  • the skin tends to form swellings and wrinkles which, when out of the user's sight, can cause these parts of the skin to become special are severely exposed to the cutting edges of the blades.
  • the comb-like projections prevent this occurrence and furthermore reduce the friction of the screen head. This creates the combined effect of a comfortable and safe shave.
  • the protrusion of each blade is the distance and the cutting edge of each blade protrudes beyond the contact area which is formed by the areas of the protective strip and the cover cap which attack the skin.
  • the contact length of the lower blade is the distance between the point of contact of the protective strip and the cutting edge of the lower blade.
  • the contact length of the upper blade is the distance between the cutting edges of the two blades.
  • the shaving angle is the angle between the plane of the blades and the plane formed by the points attacking the skin.
  • the protrusions have different values over the length of the blade, depending on the dimensions of the wave crests and wave troughs of the protrusions of the protective strip and cover cap parts. Similarly, the contact length of the lower blade changes according to the wave crests and troughs of the protective strip.
  • the best balance between brevity and security depends on the regulation of the two individual dimensions, the bulge and the contact length generated by the projections.
  • the first measurement is based on the wave crests of the projections, which are referred to as head elevations, and the second measurement is based on the wave valleys formed between two projections, which are referred to as valley elevations.
  • the head elevation lies in a range of - 0.5 mm and + 0.1 mm.
  • the elevations of the valley elevations measured in relation to the troughs of the projections lie in a range from - 0.1 mm to + 0.5 mm.
  • the contact length measured by the wave crests of the protective strip protrusions lies in a range from 0.5 mm to 4 mm and the contact length measured by the wave troughs of the protective strip protrusions lies in a range from 1 mm to 6 mm.
  • a razor head in the form of a so-called razor blade unit for a wet or safety razor which can be attached to the front end of a handle, not shown, consists of a plastic body 1 in which two razor blades 5,5 'are arranged, the cutting edges 9,9' of which run parallel and offset one behind the other.
  • the plastic body 1 consists of a base part 2 with the razor blades 5, 5 'and an upper cover cap 4 placed on this base part 2.
  • the base part 4 forms a platform or support unit 16 for the razor blades 5,5 '.
  • a spacer 21 is sandwiched between the two razor blades 5,5 ', the two razor blades 5,5' being firmly attached to it. Spacers 21 are connected. These thus form a razor blade / spacer / razor blade unit 6, which is placed on the support unit 16 of the base part 2 from above.
  • the spacer 21 comprises projections (not shown) which extend from the rear and both ends of the spacer 21 and which are received in indentations (not shown) in the side walls 25 of the base part 2.
  • the projections on both ends of the spacer 21 serve to precisely position the razor blade / spacer / razor blade unit with respect to the base part 2 and in accordance with the skin attack surface. It can be seen that the blades can be placed exactly in relation to the base part 2 by means of a number of known possibilities.
  • the base part 2 also has a protective strip 10 which runs parallel to the blades 5, 5 '.
  • the cap 4 is provided at the top with a convexly curved sliding or anti-friction strip 22, which is convexly curved so that it extends partially over the rear wall of the plastic body 1.
  • This sliding strip 22 is that it becomes more effective at the end of the razor blade unit.
  • the sliding strip 22 shaped in the radius slides better in this area and thus increases the gentle shave.
  • the protective strip 10 and the upper cover cap 4 have comb-like projections 30, 28 which extend at right angles to the blades and are arranged in series with one another.
  • the spacer 21 comprises similar comb-like projections 29. All these comb-like projections of the protective strip 10, the cover cap 4 and the spacer 21 have rounded wave crests 31 at the end of the projections. Different bends and shapes can be used at the end of the wave crests to achieve the best possible shaving comfort.
  • a rounded wave trough 32 is provided at the point where the projections are connected to the corresponding parts of the protective strip 10, the cover cap 4 and the spacer 21.
  • the preferred shape of the wave crests 31 and wave troughs 32 is that of a smooth, spherical surface with rounded side surfaces and a rounded top surface.
  • the blades are fixed at a certain shaving angle A with respect to the parts of the shaver head attacking the skin, and each blade has a particularly bulging P and contact length TL.
  • the shaving angle A is the angle between the plane of the blades and the tangent connecting the protective strip 10 and the upper cover cap 4. In the embodiment shown, the shaving angle can be between 15 ° and 30 °.
  • the curvature of the lower and the upper blades P1 and P2 is the distance by which the corresponding blade protrudes beyond the contact surface connecting the protective strip 10 and the upper cover cap 4.
  • the contact length TL1 of the lower blade 5 ' is the distance between the point of contact on the protective strip 10 and the cutting edge 9'.
  • the touch length TL2 of the upper blades 5 is the distance between the cutting edge 9 'and the cutting edge 9.
  • both the protrusions and the contact length TL1 of the lower blade are much smaller than at the trough 32 of each surface attacking the skin has been measured at 0.07 mm and the head elevations P1 'and P2' on the wave crests 31 of the comb-like projections 28, 29, 30 are 0 mm.
  • good shaves with valley elevations P1 and P2 of 0.1 mm or larger or head elevations P1 'and P2' of - 0.1 mm were achieved.
  • both the contact length TL1 'measured at the troughs 32 of the protective strip protrusions and the contact length TL1' measured at the wave crests 31 of the protective strip protrusions 30 are 1.5 mm.
  • good shaves were achieved with a trough-length TL1 of 2.5 mm and a wave-length TL1 'of 0.5 mm.
  • the protective strip projections 30 can extend so far towards the blades that this results in a Wellenberg contact length TL1 'of only 0.1 mm.
  • the razor head can have many shapes other than the one described.
  • the protrusions P1, P2 and P1 ', P2' can also have different values.
  • the blade of the second or further blades can also be fixed at a different angle to the first blade.
  • the projections 28, 29, 30 do not have to be arranged in series with one another but one or more protrusions may be arranged out of line.
  • the projections 28, 29, 30 are arranged at a preferred distance from one another and have a preferred thickness in order to achieve the goals of comfort, safety and brevity.
  • the preferred distance is at least 2 mm and the preferred thickness is at least 0.2 mm.
  • the projections 28, 29, 30 are typically made from a single plastic part, but can also be made from a metal part which has a lower frictional resistance. Alternatively or additionally, the projections 28, 29, 30 can be coated with a friction-reducing coating, such as a mixture of polyvinylpyrrollidone / polyurethane (PVP / PE).
  • a friction-reducing coating such as a mixture of polyvinylpyrrollidone / polyurethane (PVP / PE).

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Dry Shavers And Clippers (AREA)
EP93103623A 1992-03-28 1993-03-06 Tête de rasage pour rasoir mécanique Expired - Lifetime EP0563618B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9206844 1992-03-28
GB9206844A GB2265565B (en) 1992-03-28 1992-03-28 Razor head of a wet razor

Publications (2)

Publication Number Publication Date
EP0563618A1 true EP0563618A1 (fr) 1993-10-06
EP0563618B1 EP0563618B1 (fr) 1998-09-02

Family

ID=10713065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93103623A Expired - Lifetime EP0563618B1 (fr) 1992-03-28 1993-03-06 Tête de rasage pour rasoir mécanique

Country Status (4)

Country Link
US (1) US5359774A (fr)
EP (1) EP0563618B1 (fr)
DE (2) DE9210044U1 (fr)
GB (1) GB2265565B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6167625B1 (en) 1999-05-18 2001-01-02 Warner-Lambert Company Shaving implement
EP2346652B1 (fr) * 2008-09-10 2015-10-28 The Gillette Company Rasoirs pour rasage, et cartouches

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995005272A1 (fr) * 1993-08-16 1995-02-23 Warner-Lambert Company Tete de rasoir flexible avec aptitude accrue au rinçage
USD379675S (en) * 1994-07-07 1997-06-03 Feather Safety Razor Co., Ltd. Safety razor cartridge
GB9703293D0 (en) 1997-02-18 1997-04-09 Gillette Co Safety razors
US6243951B1 (en) 1997-02-18 2001-06-12 The Gillette Company Safety razors
US6430818B1 (en) * 1998-02-06 2002-08-13 American Safety Razor Company Shaving cartridge
US6276062B1 (en) * 1998-04-01 2001-08-21 American Safety Razor Corporation Triple blade safety razor
US6378211B1 (en) * 1998-04-14 2002-04-30 American Safety Razor Company Razor blade cartridge with guard ribs
US6568084B2 (en) * 1998-04-14 2003-05-27 American Safety Razor Company Razor blade cartridge with guard ribs
FR2804865B1 (fr) * 2000-02-15 2003-11-28 Oreal Utilisation des corps gras particuliers permettant de modifier les proprietes physio-chimiques de la peau et/ou des muqueuses en tant qu'agents empechant ou diminuant l'adhesion des micro-organismes sur ces dernieres
US6550141B1 (en) 2000-07-28 2003-04-22 Warner-Lambert Company Razor heads with intermediate guard elements
DE60229687D1 (de) * 2001-04-27 2008-12-18 Eveready Battery Inc Nassrasierapparat mit vier Klingen, und Kassette dafür
CA2391520A1 (fr) 2001-07-02 2003-01-02 David Charles Coffin Rasoir equipe de lames statiques et dynamiques
US7111401B2 (en) * 2003-02-04 2006-09-26 Eveready Battery Company, Inc. Razor head having skin controlling means
US7617607B2 (en) † 2003-07-21 2009-11-17 The Gillette Company Shaving razors and other hair cutting assemblies
GB2408010B (en) * 2003-11-17 2007-03-28 Knowledge & Merchandising Inc Shaving product
GB2416508A (en) * 2004-07-23 2006-02-01 Gillette Man Inc Sharp undercutter and undercutter fabrication
KR100637428B1 (ko) * 2004-12-17 2006-10-24 박혜산 정발용 커팅기구
US7681314B2 (en) * 2005-06-10 2010-03-23 Eveready Battery Company Inc. Inter-blade guard and method for manufacturing same
WO2010009181A2 (fr) * 2008-07-16 2010-01-21 The Gillette Company Rasoirs d’épilation
US20100071215A1 (en) * 2008-09-25 2010-03-25 Wonderley Jeffrey W Trimmer for shaving razor
US8209867B2 (en) * 2008-10-02 2012-07-03 The Gillette Company Shaving razors and cartridges
CN102655993B (zh) * 2009-12-18 2016-02-10 吉列公司 具有非切割元件的剃刀刀片架
USD633253S1 (en) 2010-06-23 2011-02-22 American Safety Razor Razor cartridge
USD648075S1 (en) 2010-07-07 2011-11-01 American Safety Razor Razor cartridge
USD640415S1 (en) 2010-07-07 2011-06-21 American Safety Razor Razor cartridge
USD643977S1 (en) 2010-10-19 2011-08-23 American Safety Razor Razor cartridge
USD643976S1 (en) 2010-10-19 2011-08-23 American Safety Razor Razor cartridge
KR101499287B1 (ko) * 2012-06-13 2015-03-05 주식회사 도루코 빗살가드 면도기 카트리지
KR102067749B1 (ko) * 2013-06-19 2020-01-17 빅-비올렉스 에스아 면도날 어셈블리
AU2017235651B2 (en) 2016-03-18 2019-10-31 Personal Care Marketing And Research, Inc. Razor cartridge
EP3292965B1 (fr) 2016-09-09 2021-05-26 The Gillette Company LLC Cartouche de rasoir et procédé d'assemblage
USD877983S1 (en) 2016-09-09 2020-03-10 The Gillette Company Llc Shaving razor cartridge
US9993931B1 (en) 2016-11-23 2018-06-12 Personal Care Marketing And Research, Inc. Razor docking and pivot
US11117278B2 (en) 2017-06-06 2021-09-14 The Gillette Company Llc Shaving razor cartridge
USD892406S1 (en) * 2018-06-14 2020-08-04 Wenzhou Mers Razor Works Co., Ltd. Razor head
USD884970S1 (en) 2019-02-27 2020-05-19 PCMR International Ltd. Razor cartridge guard
USD884971S1 (en) 2019-02-27 2020-05-19 Pcmr International Ltd Razor cartridge
USD884969S1 (en) 2019-02-27 2020-05-19 Pcmr International Ltd Combined razor cartridge guard and docking
USD921984S1 (en) 2019-03-19 2021-06-08 The Gillette Company Llc Shaving razor cartridge
US11000960B1 (en) 2020-11-16 2021-05-11 Personal Care Marketing And Research, Inc. Razor exposure

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB122986A (en) * 1918-06-13 1919-02-13 Cornelis Arian Mulder Improvements in Safety Razors.
GB219092A (en) * 1923-04-19 1924-07-21 Super Razors England Ltd Improvements in or connected with safety razors
FR2191459A5 (fr) * 1972-06-28 1974-02-01 Wilkinson Sword Ltd
GB1444545A (en) * 1972-10-27 1976-08-04 Wilkinson Sword Ltd Shaving apparatus
US4069580A (en) * 1976-08-18 1978-01-24 Warner-Lambert Company Safety razor with flexible blade cartridge
FR2367580A1 (fr) * 1976-10-15 1978-05-12 Warner Lambert Co Ensemble et cartouche de lames pour rasoir de surete
US4272885A (en) * 1977-09-08 1981-06-16 Warner-Lambert Company Shaving cartridge
EP0073852A2 (fr) * 1981-09-03 1983-03-16 The Gillette Company Rasoir mécanique
EP0348866A2 (fr) * 1988-07-01 1990-01-03 The Gillette Company Tête de rasoir à nervures transversales
EP0453717A1 (fr) * 1990-04-27 1991-10-30 Wilkinson Sword Gesellschaft mit beschränkter Haftung Tête de rasage, particulièrement une unité de lames pour rasoir mécanique

Family Cites Families (13)

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US1633139A (en) * 1926-07-31 1927-06-21 Rudolph C G Staats-Oels Safety razor
US1825795A (en) * 1931-04-27 1931-10-06 George H Heymann Safety razor
US3786563A (en) * 1971-08-31 1974-01-22 Gillette Co Shaving system
US4409735A (en) * 1976-08-18 1983-10-18 Warner-Lambert Company Safety razor
US4094066A (en) * 1977-03-08 1978-06-13 Daniel Jr Donald S Surgical razor blade with integral guard
US4407067A (en) * 1980-10-06 1983-10-04 The Gillette Company Shaving implement
US4443939A (en) * 1982-04-30 1984-04-24 Warner-Lambert Company Flexible razor blade cartridge
US4535537A (en) * 1984-09-12 1985-08-20 Warner-Lambert Company Disposable plastic razor
DE3788359D1 (de) * 1987-01-03 1994-01-13 Wilkinson Sword Gmbh Nassrasierapparat.
US4854043A (en) * 1987-10-30 1989-08-08 Warner-Lambert Company Flexible razor head
DE3743298A1 (de) * 1987-12-19 1989-06-29 Wilkinson Sword Gmbh Rasierapparat und verfahren zur herstellung einer flaeche geringen reibungswiderstands an einem rasierapparat
US4912846A (en) * 1988-03-18 1990-04-03 Ying Ming Yu Disposable razor
US5036587A (en) * 1990-08-29 1991-08-06 The Gillette Co. Razor blade assembly

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB122986A (en) * 1918-06-13 1919-02-13 Cornelis Arian Mulder Improvements in Safety Razors.
GB219092A (en) * 1923-04-19 1924-07-21 Super Razors England Ltd Improvements in or connected with safety razors
FR2191459A5 (fr) * 1972-06-28 1974-02-01 Wilkinson Sword Ltd
GB1444545A (en) * 1972-10-27 1976-08-04 Wilkinson Sword Ltd Shaving apparatus
US4069580A (en) * 1976-08-18 1978-01-24 Warner-Lambert Company Safety razor with flexible blade cartridge
FR2367580A1 (fr) * 1976-10-15 1978-05-12 Warner Lambert Co Ensemble et cartouche de lames pour rasoir de surete
US4272885A (en) * 1977-09-08 1981-06-16 Warner-Lambert Company Shaving cartridge
EP0073852A2 (fr) * 1981-09-03 1983-03-16 The Gillette Company Rasoir mécanique
EP0348866A2 (fr) * 1988-07-01 1990-01-03 The Gillette Company Tête de rasoir à nervures transversales
EP0453717A1 (fr) * 1990-04-27 1991-10-30 Wilkinson Sword Gesellschaft mit beschränkter Haftung Tête de rasage, particulièrement une unité de lames pour rasoir mécanique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6167625B1 (en) 1999-05-18 2001-01-02 Warner-Lambert Company Shaving implement
EP2346652B1 (fr) * 2008-09-10 2015-10-28 The Gillette Company Rasoirs pour rasage, et cartouches

Also Published As

Publication number Publication date
GB9206844D0 (en) 1992-05-13
US5359774A (en) 1994-11-01
EP0563618B1 (fr) 1998-09-02
DE9210044U1 (de) 1992-11-19
GB2265565A (en) 1993-10-06
GB2265565B (en) 1995-03-22
DE59308937D1 (de) 1998-10-08

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