EP0025326A1 - Système de rasage - Google Patents

Système de rasage Download PDF

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Publication number
EP0025326A1
EP0025326A1 EP80303025A EP80303025A EP0025326A1 EP 0025326 A1 EP0025326 A1 EP 0025326A1 EP 80303025 A EP80303025 A EP 80303025A EP 80303025 A EP80303025 A EP 80303025A EP 0025326 A1 EP0025326 A1 EP 0025326A1
Authority
EP
European Patent Office
Prior art keywords
handle
connection
blade assembly
razor
slide
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.)
Withdrawn
Application number
EP80303025A
Other languages
German (de)
English (en)
Inventor
Robert Anthony Trotta
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.)
Gillette Co LLC
Original Assignee
Gillette 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
Priority claimed from US06/071,476 external-priority patent/US4282651A/en
Priority claimed from US06/071,471 external-priority patent/US4281454A/en
Priority claimed from US06/071,711 external-priority patent/US4282650A/en
Application filed by Gillette Co LLC filed Critical Gillette Co LLC
Publication of EP0025326A1 publication Critical patent/EP0025326A1/fr
Withdrawn legal-status Critical Current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
    • B26B21/52—Handles, e.g. tiltable, flexible
    • B26B21/521—Connection details, e.g. connection to razor heads
    • 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
    • B26B21/08—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 involving changeable blades
    • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
    • B26B21/22—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously
    • B26B21/222—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit
    • B26B21/225—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit the changeable unit being resiliently mounted on the handle

Definitions

  • This invention relates to wet shaving systems, and is directed more particularly to such systems in which a replaceable blade assembly is moveably attached to a handle.
  • Safety razors conventionally comprise a guard member and a cap member between which, in use, a disposable razor blade is sandwiched, and a handle, the guard member, the cap member, and the handle being fixed relative to one another.
  • the latter feature is present in the conventional one-piece and "three-piece" razors designed to take disposable double-edged blades.
  • Safety razors have recently appeared on the market which comprise, instead of disposable razor blades, a disposable razor blade assembly, or head, having a guard member, one or more blades, and a cap member held rigidly together.
  • the disposable razor blade assembly is rigidly attached to a handle so that the razor edges are at a fixed angular attitude relative to the handle.
  • the blade assembly is replaced as a whole when the razor cutting edge (or edges) becomes dull.
  • a factor in shaving efficiency and effectiveness is the orientation of the active components of the shaving system relative to the skin surface being shaved.
  • the surface frequently has undulations or is in a relatively inaccessible or awkward area to reach and the shaving action is reduced in efficiency because the relationship of the active element to the skin surface being shaved significantly departs from the optimum value.
  • Razors in which there is a fixed relationship between the shaving unit and the handle call for considerable dexterity on the part of the user and substantial changes in the disposition of the handle in order to maintain the shaving unit at its optimum attitude on the shaver's face, particularly when negotiating areas, such as the jaw line, where there are gross changes in facial contours.
  • a shaving system comprising a handle and a blade assembly, characterized in that the handle has first and second connections extending from an end thereof to receive the blade assembly and in that said blade assembly has a first body portion provided with a first handle engaging connection and a second body portion provided with a second handle engaging connection, the first handle engaging connection being pivotally connected to said first connection on the handle and the second handle engaging connection being fixedly connected to said second connection on the handle.
  • a razor blade assembly for use in such a shaving system characterized by a body portion having at least one blade permanently fixed therein, a first handle engaging connection disposed on said body portion and adapted to engage a razor handle to form a pivotal connection therebetween, and a second handle engaging connection disposed on said body portion and adapted to fixedly interconnect with a mounting on said razor handle.
  • a razor handle for use in such a shaving system, said razor handle being characterized by grip portion, a neck portion extending from said grip portion, a first connection extending from a free end of said neck portion and adapted to engage said blade assembly to form a pivotal connection therebetween and a second connection extending from said free end of said neck portion and adapted to fixedly interconnect with a mounting on said blade assembly.
  • an illustrative razor blade assembly 1 comprises a body 2, which may be of molded plastic.
  • the body 2 may comprise a platform portion 4 to which is fixed a cap portion 6, as by rivet means 8.
  • blade means 10 Permanently fixed between the platform and cap portions 4, 6 are blade means 10 which may, as illustrated, include first and second blades 12, 14 separated by a spacer means 16.
  • the rivet means 8 extend through the blades 12, 14 and spacer 16 to securely join the blade assembly components.
  • a guard portion 20 Connected to the platform portion 4 by means of a relatively thin molded web 18 is a guard portion 20.
  • the web 18 is an integrally molded portion of the body portion which hingedly interconnects the platform portion 4 and the guard portion 20.
  • a first portion 22 of the body 2 is pivotally joined, by way of the web 18, to a second portion 24 of the body.
  • the first connecting means Disposed on the first portion 22 of the body 2 is a first connecting means 26 by which the blade assembly may be pivotally connected to a razor handle, as will be further described hereinbelow.
  • the first connecting means comprises a projection 28 extending downwardly and rearwardly (to the right as viewed in Fig. 6).
  • the projection 28 is disposed centrally of the blade assembly, extending from an undersurface 32 of the platform portion 4.
  • the second connecting means 34 Disposed on the second portion 24 of the body 2 is a second connecting means 34 by which the blade assembly may be fixedly connected to the razor handle, as will be further described hereinbelow.
  • the second connecting means as illustrated, comprise a pair of parallel elongated rails 36 extending from the guard portion 20, width-wise of the blade assembly, i.e., extending forwardly and rearwardly.
  • the rails 36 define opposed grooves 38 which comprise a blade assembly slide means and are adapted to slidingly receive a razor handle slide means.
  • the first portion 22 of the body 2 is adapted to be pivotally connected to the razor handle, while the second portion 24 is adapted to be fixedly connected to the razor handle, the first and second portions 22, 24 being pivotally joined to each other.
  • a razor handle 40 suitable for use with the illustrative blade assembly includes a grip portion 42 and a neck portion 44.
  • the neck portion comprises a front plate 46 and a back plate 48 connected together to form a chamber 50.
  • the back plate 48 at its free end, is provided with an extension 52 comprising a frame portion 54 having an aperture 56 therein, the aperture 56 being adapted to receive the projection 28 extending from the blade assembly 1 to form a pivotal connection between the blade assembly and the handle.
  • the extension 52 is immovably disposed on the neck portion.
  • the frame portion 54 comprises a handle first connecting means 57 adapted to engage the blade assembly first connecting means 26 to form a pivotal connection.
  • the front plate 46 is preferably formed with a pair of parallel elongated runners 58 forming a slideway 60 covered by a top plate 62 disposed in the chamber 50.
  • a razor handle slide member 64 comprising a bar 66 from which extends a pair of tongues 68.
  • the tongues 68 are adapted to be received by the grooves 38 of the blade assembly.
  • the tongues 68 accordingly constitute a razor handle second connecting means 70 adapted to be fixedly connected to the blade assembly second connecting means 34.
  • the bar 66 is biased toward the free end of the neck portion by a coil spring 72 disposed in the chamber 50, the spring extending between an end of the bar 66 and a surface 74 formed in the front plate 46.
  • the front plate 46 is of plastic and the backplate 48 is of metal.
  • the razor handle 40 may be connected to the blade assembly 1 by engaging the tongues 68 with the rails 36, simultaneously causing engagement of the frame portion 54 with the projection 28, thereby effecting a first pivotal connection between the handle and the blade assembly body first portion 22, and effecting a second fixed connection between the handle and the blade assembly bcdy second portion 24.
  • the blade assembly behaves in much the same manner as blade assemblies of the type fixedly and immovably connected to their handles, until a particular force level is exerted on the razor.
  • the blade assembly When the blade assembly is urged by the operator against the surfaces being shaved with sufficient force to overcome the bias of the spring 72, the bar 66, and the tongues 68 with it, moves in the neck portion 44 towards the grip portion 42, permitting the blade assembly first portion 22 to pivot about the frame portion 54 of the handle.
  • the blade assembly second portion 24 is fixedly connected to the tongues 68 and therefore moves with the tongues, causing the pivotal movement between the first and second portions of the blade assembly.
  • Such movement between the first and second portions of the blade assembly has the effect of relatively withdrawing the first blade rearwardly behind a plane P extending from the cutting edges of the second blade to a guard portion tangent point, and further, of decreasing the angle a formed by a first line b extending through the plane of the first blade 12 and a second line c extending from the cutting edge of the first blade to a tangent point on the guard portion.
  • Exposure is defined as the distance, measured perpendicularly to a reference plane defined by skin engaging surfaces immediately in front of and behind the cutting edge (the plane P), from the cutting edge to that plane, the exposure being considered positive when the cutting edge is located on the outer (skin) side of that plane and being considered negative when the cutting edge is further from the skin than that plane.
  • the blade assembly starts to automatically adjust the blade tangent angle of the first blade from approximately 26° to approximately 15°, and the exposure of the first blade from .0015 inch to -.004 inch.
  • the razor is lifted from the surface being shaved, a force load is no longer exerted on the blade assembly and the shaving geometry reverts to its normal static geometry.
  • the threshold sensing force be about 50 grams.
  • the blade assembly geometry remains in its static condition, with forces exceeding 50 grams, the razor starts decreasing the blade assembly geometry (blade tangent angle and exposure).
  • the front plate 46 is provided with stop means 76 which limit the downward movement of the bar 66, and thereby limit the extent to which the blade means 10 can be "retracted".

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
EP80303025A 1979-08-31 1980-08-29 Système de rasage Withdrawn EP0025326A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US06/071,476 US4282651A (en) 1979-08-31 1979-08-31 Razor handle
US06/071,471 US4281454A (en) 1979-08-31 1979-08-31 Shaving system
US06/071,711 US4282650A (en) 1979-08-31 1979-08-31 Razor blade assembly
US71476 1987-07-09
US71471 1998-05-01
US71711 1998-05-01

Publications (1)

Publication Number Publication Date
EP0025326A1 true EP0025326A1 (fr) 1981-03-18

Family

ID=27371889

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80303025A Withdrawn EP0025326A1 (fr) 1979-08-31 1980-08-29 Système de rasage

Country Status (1)

Country Link
EP (1) EP0025326A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989002352A1 (fr) * 1987-09-08 1989-03-23 Synertrade And Finance S.A. Rasoir mecanique a tete amovible

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1456179A (en) * 1974-05-03 1976-11-17 Warner Lambert Co Adjustable safety razor
GB1470386A (en) * 1973-05-15 1977-04-14 Wilkinson Sword Ltd Shaving units
US4026016A (en) * 1975-05-12 1977-05-31 The Gillette Company Razor blade assembly
US4063354A (en) * 1975-05-29 1977-12-20 The Gillette Company Shaving unit
GB1496149A (en) * 1974-01-14 1977-12-30 Gillette Co Razor blade unit
FR2379357A1 (fr) * 1977-02-02 1978-09-01 Gillette Co Rasoir de surete
FR2406504A1 (fr) * 1977-10-24 1979-05-18 Gillette Co Rasoir de surete

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1470386A (en) * 1973-05-15 1977-04-14 Wilkinson Sword Ltd Shaving units
GB1496149A (en) * 1974-01-14 1977-12-30 Gillette Co Razor blade unit
GB1456179A (en) * 1974-05-03 1976-11-17 Warner Lambert Co Adjustable safety razor
US4026016A (en) * 1975-05-12 1977-05-31 The Gillette Company Razor blade assembly
US4063354A (en) * 1975-05-29 1977-12-20 The Gillette Company Shaving unit
FR2379357A1 (fr) * 1977-02-02 1978-09-01 Gillette Co Rasoir de surete
FR2406504A1 (fr) * 1977-10-24 1979-05-18 Gillette Co Rasoir de surete

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989002352A1 (fr) * 1987-09-08 1989-03-23 Synertrade And Finance S.A. Rasoir mecanique a tete amovible
EP0314612A1 (fr) * 1987-09-08 1989-05-03 SYNERTRADE & FINANCE S.A. Rasoir mécanique à tête amovible

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19810908

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830120

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TROTTA, ROBERT ANTHONY