EP0446430A1 - Tête de rasage - Google Patents

Tête de rasage Download PDF

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Publication number
EP0446430A1
EP0446430A1 EP90122793A EP90122793A EP0446430A1 EP 0446430 A1 EP0446430 A1 EP 0446430A1 EP 90122793 A EP90122793 A EP 90122793A EP 90122793 A EP90122793 A EP 90122793A EP 0446430 A1 EP0446430 A1 EP 0446430A1
Authority
EP
European Patent Office
Prior art keywords
sliding strip
razor blade
shaving
razor
plastic housing
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
EP90122793A
Other languages
German (de)
English (en)
Other versions
EP0446430B1 (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 EP0446430A1 publication Critical patent/EP0446430A1/fr
Application granted granted Critical
Publication of EP0446430B1 publication Critical patent/EP0446430B1/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
    • B26B21/44—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 invention relates to a razor head, in particular a razor blade unit, arranged at the front end of a handle of a wet shaving apparatus, with a plastic housing having a front guide bar and a rear cover cap, in which a razor blade is embedded and a separate sliding strip is arranged on the cover cap.
  • Wet shavers basically consist of a handle, at the front end of which a shaving head is arranged.
  • This shaving head can be formed in one piece with the handle to form a so-called disposable razor.
  • the so-called razor blade units are also known, in which a single or double razor blade is embedded in a non-detachable manner in a plastic housing and which can be arranged interchangeably by means of a corresponding mechanism at the front end of a handle of the wet shaving apparatus.
  • the razor head in both a disposable razor and a razor blade unit consists of a plastic housing in which a razor blade is embedded.
  • This plastic housing has a front guide bar and a rear cover cap that go together define the shaving geometry with the cutting edge of the razor blade.
  • the cover cap has a sliding strip. It is a solid but water-soluble shaving aid that reduces the frictional resistance between the skin and the shaving head during the shaving process.
  • the cover cap is provided with a recess which runs parallel to the cutting edge of the razor blade and into which the sliding strip is inserted.
  • the disadvantage here is that the sliding strip protrudes from the top of the cover cap and thus changes the shaving geometry in such a way that a deteriorated shaving result is the result. This is due to the fact that the sliding strip only makes up part of the relatively wide cover cap. The resulting relatively poor gliding behavior makes a gentle shave impossible, which is particularly critical for sensitive skin.
  • the object of the invention is to further develop the known shaving head in such a way that a gentler shave is made possible.
  • the invention proposes that the cover cap is formed essentially exclusively by the sliding strip.
  • the razor head in particular the razor blade unit of the wet shaver, has an extremely wide sliding strip, which forms the entire surface behind the cutting edge of the razor blade and thus the cover cap, a particularly gentle shave is possible, which is particularly noticeable on sensitive skin.
  • an enlargement the effective surface of the glide strip leads to an improvement in shaving comfort in the direction of gentleness.
  • the reason for this is to be seen in the fact that an increased sliding strip surface with unchanged application of force to the razor leads to less severe deformation of the skin and the reduced specific surface pressure, namely the pressure, activates the sliding layer better and permanently.
  • the surprising success of widening the sliding strip is therefore the result of an improved sliding behavior. It is worth noting that the classic laws of mechanics are not used in the shaving process.
  • the coefficient of friction and thus the frictional force is independent of the size of the contact surface and this applies provided that the friction partners are not elastic
  • wet shaving it has emerged as a surprising effect with wet shaving that the coefficient of friction depends on the size of the contact surface of the friction partners depends. The larger the area, the lower the coefficient of friction. With wet shaving, this is due to the fact that the skin is elastic.
  • the widened sliding strip has the advantage that it defines an optimal, same shaving angle without, for example, disturbing the shaving geometry.
  • the sliding strip is essentially wedge-shaped and is inserted with its wedge tip in the shaving direction forward into the upper-side recess of the plastic housing.
  • the gliding strip can in particular be glued for fixing.
  • the wedge-shaped design of the glide strip has the advantage that an optimal shaving geometry can thereby be set, the wedge tip of the glide strip running essentially directly behind the cutting edge of the razor blade parallel to the latter.
  • the sliding strip can also be a film glued to the top of the plastic housing.
  • the sliding strip In a further development of the sliding strip, it is proposed that it have an essentially flat surface. This reduces the frictional resistance of the sliding strip to a minimum.
  • the lubricant for the sliding strip is a xerogel which, when water is taken up as a dispersing agent, changes into a lyogel with a coefficient of friction ⁇ ⁇ 0.25 which is highly slidable on the skin of the user.
  • a lubricant has the advantage of a very low coefficient of friction, so that an extremely gentle shave is possible with such a sliding strip.
  • Such a lubricant is described in the applicant's German patent application P 37 43 298.2. The features contained therein are particularly in the claims likewise the subject of the present application relating to the lubricant for the sliding strip based on a xerogel.
  • the first embodiment of a razor blade unit 1 shown in FIGS. 1 and 2 consists of a plastic housing 2, in which a razor blade 4 in the form of a single razor blade is non-detachably embedded on a blade table 3.
  • the razor blade 4 is sandwiched between the blade table 3 of the plastic housing 2 and the upper housing 5 for a cover cap 6, wherein the plastic housing 5 is riveted to the plastic housing 2.
  • the plastic housing 2 has a front guide bar 7 which extends parallel to the cutting edge of the razor blade 4.
  • the housing 5 for the cover cap 6 is provided with a recess 8 on the upper side.
  • a wedge-shaped sliding strip 9 is received and fixed by gluing.
  • the chisel tip 10 of the sliding strip 9 is oriented in the shaving direction and runs parallel to the cutting edge of the razor blade 4.
  • the surface 11 of the sliding strip 9 is flat.
  • the sliding strip 9 covers almost the entire area behind the razor blade 4 and thus forms the cover cap 6 which, together with the front guide bar 7 and the razor blade 4, defines the cutting geometry of the razor blade unit 1.
  • the wide sliding strip 9 is a prerequisite for an exceptionally gentle shave and a well-defined shaving angle.
  • the second embodiment in FIGS. 3 and 4 has the same basic structure as the first embodiment in FIGS. 1 and 2.
  • the only difference is the design and application of the slide strip 9.
  • This is in this embodiment in the form of a film 12 which is glued to the top 13 of the plastic housing 2 and in particular to the housing 5 of the cover cap 6.
  • This film 12 is also very wide and defines the actual covering cap 6.
  • the film 12 of the second embodiment is also flat on the top.
  • the second embodiment of the razor blade unit 1 is characterized by an extremely gentle shave under a well-defined shaving angle.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Motor Or Generator Cooling System (AREA)
EP90122793A 1990-03-08 1990-11-29 Tête de rasage Expired - Lifetime EP0446430B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9002710U 1990-03-08
DE9002710U DE9002710U1 (de) 1990-03-08 1990-03-08 Rasierklingeneinheit

Publications (2)

Publication Number Publication Date
EP0446430A1 true EP0446430A1 (fr) 1991-09-18
EP0446430B1 EP0446430B1 (fr) 1996-04-03

Family

ID=6851745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122793A Expired - Lifetime EP0446430B1 (fr) 1990-03-08 1990-11-29 Tête de rasage

Country Status (6)

Country Link
US (1) US5095620A (fr)
EP (1) EP0446430B1 (fr)
AT (1) ATE136245T1 (fr)
DE (2) DE9002710U1 (fr)
ES (1) ES2085314T3 (fr)
GR (1) GR3019620T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3597380A1 (fr) 2018-07-18 2020-01-22 Societé BIC S.A. Ensembles de pales à éléments de lubrification

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0556531B1 (fr) * 1992-02-14 1995-05-03 Wilkinson Sword Gesellschaft mit beschränkter Haftung Tête de rasage, particulièrement une unité de lames pour rasoir mécanique
US5626154A (en) * 1993-09-13 1997-05-06 The Gillette Company Method and system for shaving including a lubricant and a water-swellable polymer
US5711076A (en) * 1996-03-27 1998-01-27 The Gillette Company Shaving system with improved guard structure
US5956848A (en) 1997-02-27 1999-09-28 The Gillette Company Shaving system
USD422380S (en) * 1998-08-31 2000-04-04 The Gillette Company Shaving aid strip for razor cartridge
FR2793435B1 (fr) * 1999-05-12 2001-08-03 Bic Rech Et Dev Tete de rasoir comportant un element anti-friction solidaire d'une semelle
US6167625B1 (en) 1999-05-18 2001-01-02 Warner-Lambert Company Shaving implement
US20040177513A1 (en) * 1999-05-27 2004-09-16 William Vreeland Razor glide strip
USD424745S (en) * 1999-08-05 2000-05-09 The Gillette Company Shaving aid strip for razor cartridge
US7197825B2 (en) * 2004-03-11 2007-04-03 The Gillette Company Razors and shaving cartridges with guard
EP2379770A1 (fr) * 2008-12-16 2011-10-26 Solvay Fluor GmbH Pieces metalliques contenant un revêtement de protection
US9840014B2 (en) * 2016-03-25 2017-12-12 Avraham Gilor Safety razor
US9931755B2 (en) 2016-03-25 2018-04-03 Avraham Gilor Safety razor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2009017A (en) * 1977-12-02 1979-06-13 Warner Lambert Co Razor cartridges
GB2024082A (en) * 1978-05-31 1980-01-09 Gillette Co Safety razors
DE3743298A1 (de) * 1987-12-19 1989-06-29 Wilkinson Sword Gmbh Rasierapparat und verfahren zur herstellung einer flaeche geringen reibungswiderstands an einem rasierapparat
US4875287A (en) * 1986-11-14 1989-10-24 Hydromer, Inc. Shaving articles lubricious when wet and compositions therefor
EP0184440B1 (fr) * 1984-12-07 1991-02-06 The Gillette Company Unité de rasage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738000A (en) * 1971-07-29 1973-06-12 A Samko Disposable razor
US4077119A (en) * 1977-02-16 1978-03-07 Jose Manuel Sellera Shaving device
US4328615A (en) * 1979-12-31 1982-05-11 Warner-Lambert Company Razor blade assembly with movable cover cap
US4683096A (en) * 1986-01-31 1987-07-28 Warner-Lambert Company Method of securing a shaving aid to a razor cartridge
DE3814135A1 (de) * 1987-05-06 1988-11-24 Wilkinson Sword Gmbh Verfahren zur herstellung einer hydrophilen beschichtung auf einem formteil und unter anwendung des verfahrens hergestellter rasierapparat

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2009017A (en) * 1977-12-02 1979-06-13 Warner Lambert Co Razor cartridges
GB2024082A (en) * 1978-05-31 1980-01-09 Gillette Co Safety razors
EP0184440B1 (fr) * 1984-12-07 1991-02-06 The Gillette Company Unité de rasage
US4875287A (en) * 1986-11-14 1989-10-24 Hydromer, Inc. Shaving articles lubricious when wet and compositions therefor
DE3743298A1 (de) * 1987-12-19 1989-06-29 Wilkinson Sword Gmbh Rasierapparat und verfahren zur herstellung einer flaeche geringen reibungswiderstands an einem rasierapparat

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3597380A1 (fr) 2018-07-18 2020-01-22 Societé BIC S.A. Ensembles de pales à éléments de lubrification
WO2020016354A1 (fr) 2018-07-18 2020-01-23 Societe Bic Ensembles lame comprenant des éléments lubrifiants
US11685070B2 (en) 2018-07-18 2023-06-27 SOCIéTé BIC Blade assemblies with lubricating elements

Also Published As

Publication number Publication date
ATE136245T1 (de) 1996-04-15
EP0446430B1 (fr) 1996-04-03
US5095620A (en) 1992-03-17
DE59010260D1 (de) 1996-05-09
DE9002710U1 (de) 1991-07-11
GR3019620T3 (en) 1996-07-31
ES2085314T3 (es) 1996-06-01

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