EP0446430B1 - Rasierklingeneinheit - Google Patents

Rasierklingeneinheit Download PDF

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Publication number
EP0446430B1
EP0446430B1 EP90122793A EP90122793A EP0446430B1 EP 0446430 B1 EP0446430 B1 EP 0446430B1 EP 90122793 A EP90122793 A EP 90122793A EP 90122793 A EP90122793 A EP 90122793A EP 0446430 B1 EP0446430 B1 EP 0446430B1
Authority
EP
European Patent Office
Prior art keywords
razor blade
razor
cover cap
strip
shaving
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.)
Expired - Lifetime
Application number
EP90122793A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0446430A1 (de
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/de
Application granted granted Critical
Publication of EP0446430B1 publication Critical patent/EP0446430B1/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
    • B26B21/44—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 with an embedded single razor blade, a sliding strip being arranged as a separate part on a housing for the cover cap and the whole Covers the surface of the cap behind the cutting edge of the individual razor blade.
  • Wet shavers basically consist of a handle, at the front end of which a shaving head is arranged.
  • This shaving head can be integrally formed 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 permanently embedded in a plastic housing and which can be interchangeably arranged by means of a corresponding mechanism at the front end of a handle of the wet shaving apparatus.
  • the razor head 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 which, together with the cutting edge of the razor blade, define the shaving geometry.
  • the cover cap has a sliding strip. It is a solid, but water-soluble shaving aid, which the Reduced frictional resistance between the skin and the razor 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. Overall, 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.
  • US-A-4,875,287 discloses a generic razor blade unit for a wet shaver.
  • a single razor blade is embedded in a plastic housing, this plastic housing having a front guide bar and a rear cover cap.
  • a sliding strip is arranged in a corresponding recess in the rear cover cap.
  • This sliding strip covers almost the entire surface of the cap behind the cutting edge of the individual razor blade.
  • the film forming the sliding strip is a strip provided with a curved surface, which follows the geometry of the recess in the cover cap underneath.
  • there are disadvantages in the sliding behavior due to the cap edges surrounding the sliding strip on the other hand, however, there is an undefined shaving geometry.
  • the curved surface comes tangentially into contact with the skin to be shaved in an unpredictable width, so that the shaving geometry is not predetermined. Since the glide strip consists of a water-soluble glide material, it changes its surface geometry with increasing use.
  • GB-A-2 009 017 shows a substantially flat film which is arranged as a narrow strip on the top of the cover cap. Furthermore, it is disclosed to arrange a slide strip blade on the cutting edge, to produce the entire guide strip or the entire shaving head from lubricant material. In DE-A-3 743 298 it is disclosed to arrange a sliding strip on the cover cap which is comparatively narrow and only one Covers part of the cover cap.
  • GB-A-2 024 082 discloses making the entire shaving head housing, the entire guide bar or the entire rear cap from a lubricant material.
  • the object of the invention is to further develop the known shaving head in such a way that an even gentler shaving is thereby made possible and an optimal shaving geometry can be set.
  • the sliding strip has an essentially flat surface and is essentially wedge-shaped, and its wedge tip is inserted forwardly into the upper recess of the housing in the shaving direction.
  • 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 in sensitive houses.
  • 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 can be seen in the fact that an increased sliding strip surface with unchanged force input into the shaving apparatus 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 thus 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 wedge-shaped and is inserted with its wedge tip toward the front in the shaving direction in the upper recess of the plastic housing. To fix it, the glide strip can be glued in particular.
  • 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 essentially parallel to the cutting edge of the razor blade.
  • 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, the housing 5 being riveted from plastic 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 slide strip 9 is aligned in the shaving direction and runs parallel to the cutting edge of the razor blade 4.
  • the surface 11 of the slide 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.

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 Rasierklingeneinheit Expired - Lifetime EP0446430B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=6851745

Family Applications (1)

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

Country Status (6)

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

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0556531T3 (da) * 1992-02-14 1995-09-04 Wilkinson Sword Gmbh Barbermaskinehoved, navnlig barberbladsenhed til en vådbarbermaskine
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
JP5650658B2 (ja) * 2008-12-16 2015-01-07 ゾルファイ フルーオル ゲゼルシャフト ミット ベシュレンクテル ハフツングＳｏｌｖａｙ Ｆｌｕｏｒ ＧｍｂＨ 保護被膜を含有する金属部品
US9931755B2 (en) 2016-03-25 2018-04-03 Avraham Gilor Safety razor
US9840014B2 (en) * 2016-03-25 2017-12-12 Avraham Gilor Safety razor
EP3597380B1 (en) 2018-07-18 2021-11-03 Societé BIC S.A. Blade assemblies with lubricating elements

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077119A (en) * 1977-02-16 1978-03-07 Jose Manuel Sellera Shaving device

Family Cites Families (9)

* 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
US4170821A (en) * 1977-12-02 1979-10-16 Warner-Lambert Company Razor cartridges
GB2024082B (en) * 1978-05-31 1982-05-06 Gillette Co Safety razors
US4328615A (en) * 1979-12-31 1982-05-11 Warner-Lambert Company Razor blade assembly with movable cover cap
US4624051A (en) * 1984-12-07 1986-11-25 The Gillette Company Shaving unit
US4683096A (en) * 1986-01-31 1987-07-28 Warner-Lambert Company Method of securing a shaving aid to a razor cartridge
US4875287A (en) * 1986-11-14 1989-10-24 Hydromer, Inc. Shaving articles lubricious when wet and compositions therefor
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
DE3743298A1 (de) * 1987-12-19 1989-06-29 Wilkinson Sword Gmbh Rasierapparat und verfahren zur herstellung einer flaeche geringen reibungswiderstands an einem rasierapparat

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077119A (en) * 1977-02-16 1978-03-07 Jose Manuel Sellera Shaving device

Also Published As

Publication number Publication date
ATE136245T1 (de) 1996-04-15
ES2085314T3 (es) 1996-06-01
EP0446430A1 (de) 1991-09-18
DE9002710U1 (nl) 1991-07-11
US5095620A (en) 1992-03-17
DE59010260D1 (de) 1996-05-09
GR3019620T3 (en) 1996-07-31

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