EP0451381A1 - Lame de sécurité - Google Patents

Lame de sécurité Download PDF

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Publication number
EP0451381A1
EP0451381A1 EP90303847A EP90303847A EP0451381A1 EP 0451381 A1 EP0451381 A1 EP 0451381A1 EP 90303847 A EP90303847 A EP 90303847A EP 90303847 A EP90303847 A EP 90303847A EP 0451381 A1 EP0451381 A1 EP 0451381A1
Authority
EP
European Patent Office
Prior art keywords
cutting edge
blade
projections
razor
sections
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Withdrawn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
EP90303847A
Other languages
German (de)
English (en)
Inventor
Ying Ming Yu
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.)
YU, YING MING
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP90303847A priority Critical patent/EP0451381A1/fr
Publication of EP0451381A1 publication Critical patent/EP0451381A1/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Withdrawn legal-status Critical Current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
    • B26B9/00—Blades for hand knives
    • B26B9/02—Blades for hand knives characterised by the shape of the cutting edge, e.g. wavy
    • 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
    • B26B21/54—Razor-blades
    • B26B21/56—Razor-blades characterised by the shape

Definitions

  • the present inventions relates to safety blades for use for example in knives, razors and other cutting tools.
  • a conventional cutting tool is in general provided with a blade having a straight or serrated cutting edge, depending on the intended purpose of the tool, whether for sawing, scraping, or cutting through. Careless use of cutting tools often leads to injury on the blade however, but attempts to improve safety, by sheilding the blade for example, often compromise the effectiveness of the tool.
  • Three prior art cutting tools are shown in Figs. 1 -3 of the accompanying drawings.
  • a dispoable razor is shown, wherein a double edged razor blade 11 is inserted into the blade cartridge 131 of razor 13 by a blade injector 12.
  • a conventional electric razor has the advantage of never hurting the user's skin, but has the following disadvantages: it has to use power, and its cutters are limited by the comb grid surface so that long hairs cannot extend through the combs to be cut by the cutters when the electric shaver is pressed into contact with the user's skin. This is an example of sheilding limiting the effect of a cutting tool.
  • U.S. Patent No. 3,797,110 makes use of a machine to stamp a metal sheet with a plurality of grooves, so that the surface of the metal sheet forms a plurality of protruding ribs.
  • the bottom edge of the metal sheet is then ground into an incline or bevel by a grinding tool so that the grooved edge forms a sharp cutting edge, and the ends of protruding ribs, due to the grinding angle, protrude beyond the sharp cutting edge.
  • the edges of each pair of protruding ribs are pressed against the user's skin, which lightly contacts the cutting edge.
  • the shaver is sliding, the user's hair can be safely shaved.
  • the other reverse face of the metal sheet cannot be similarly made with a plurality of protruding ribs, and thus cannot be used for for shaving, so that the blade is not reversible.
  • the grooves also tend to harbour dirt which cannot be easily cleaned and thus is unhygenic.
  • Such a blade cannot be used like a conventional razor , which can be used reversibly, so as to enhance its convenience of use, and for cleaning the blade.
  • An object of this invention is to provide a safety blade which will not be able to bring its cutting edge into contact with a user's skin due to careless use or by accident.
  • a safety blade characterised in that it has a cutting edge provided with a plurality of smooth-faced and rounded projections of suitable size arranged as a comb extending from one end of the cutting edge to the other, the protuberances being integrally formed with the cutting edge.
  • the size and spacing of the protuberances will depend upon the intended use of the blade.
  • the cutting edge is divided into sections between the protuberances or projections, and the sections of cutting edge may each be straight or curved, for example arcuate.
  • a blade according to the invention may be adapted for use in shaving, or for household or culinary use, in cutlery and craft tools also.
  • a straight cutting edge 41 or 51 respectively is provided with a plurality of smooth faced, rounded and suitably spaced projections or protuberences 42 (52), of suitable dimensions arranged in the form of a comb to project in front of the cutting edge 41 (51).
  • a corrugated or fluted cutting edge 61 (71) is provided with a plurality of smooth faced, rounded and equally spaced projections or protuberences 62 (72) of suitable dimensions and similar to those in Figs. 4 and 5, and arranged as a comb projecting in front of the extremity 61a (71a) of the cutting edge 61 (71).
  • a cutting edge 81 of a razor blade is provided with a plurality of smooth-faced and rounded projections or protuberences 82, of suitable size, arranged to form a comb extending from one side to the other of the cutting
  • These projections 82 project slightly ahead of the sharp cutting edge 81 and are integrally formed with the sharp cutting edge 81.
  • these projections 82 first contact the user's skin which is pressed by the projections and can only slightly enter between the projections to contact the cutting edge 81, no matter how much pressure is exerted on the blade, so that the cutting edge 81 just contacts the skin for shaving the beard or other hair, but can never penetrate the user's skin, thus ensuring safety in the shaving operation.
  • the smooth-faced and rounded projections or protuberances 82 on the cutting edge are similar in general form to a plurality of conical members, the bases of which merge with the cutting edge 81 but do not project ahead of the cutting edge 81.
  • This embodiment therefore provides a razor which, like a conventional razor, is fully reversible, as both faces can be used for shaving.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
EP90303847A 1990-04-10 1990-04-10 Lame de sécurité Withdrawn EP0451381A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP90303847A EP0451381A1 (fr) 1990-04-10 1990-04-10 Lame de sécurité

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90303847A EP0451381A1 (fr) 1990-04-10 1990-04-10 Lame de sécurité

Publications (1)

Publication Number Publication Date
EP0451381A1 true EP0451381A1 (fr) 1991-10-16

Family

ID=8205365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90303847A Withdrawn EP0451381A1 (fr) 1990-04-10 1990-04-10 Lame de sécurité

Country Status (1)

Country Link
EP (1) EP0451381A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543199A1 (fr) * 1991-11-12 1993-05-26 Hoechst Celanese Corporation Ciseaux de sécurité
EP0584488A1 (fr) * 1992-06-29 1994-03-02 Hoechst Celanese Corporation Ciseaux de sécurité
WO2004089582A3 (fr) * 2003-02-25 2004-11-25 Eveready Battery Inc Procede pour fabriquer une lame de rasoir
WO2015034530A1 (fr) * 2013-09-09 2015-03-12 Levy Dara Dispositif portatif de dermaplaning et procédé de dermaplaning
US9918539B2 (en) 2013-09-09 2018-03-20 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
US10111681B2 (en) 2013-09-09 2018-10-30 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
KR20180123662A (ko) * 2015-12-21 2018-11-19 디디 카르마 엘엘씨 파지형 더마플래닝 장치 및 더마플래닝 처리

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4912846A (en) * 1988-03-18 1990-04-03 Ying Ming Yu Disposable razor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4912846A (en) * 1988-03-18 1990-04-03 Ying Ming Yu Disposable razor

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543199A1 (fr) * 1991-11-12 1993-05-26 Hoechst Celanese Corporation Ciseaux de sécurité
US5297342A (en) * 1991-11-12 1994-03-29 Hoechst Celanese Corporation Safety scissors
EP0584488A1 (fr) * 1992-06-29 1994-03-02 Hoechst Celanese Corporation Ciseaux de sécurité
WO2004089582A3 (fr) * 2003-02-25 2004-11-25 Eveready Battery Inc Procede pour fabriquer une lame de rasoir
US9918539B2 (en) 2013-09-09 2018-03-20 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
CN105705104A (zh) * 2013-09-09 2016-06-22 迪迪卡玛有限责任公司 手持皮肤整平装置及皮肤整平方法
JP2016533847A (ja) * 2013-09-09 2016-11-04 リービ、ダーラ 携帯皮膚剥離装置および皮膚剥離プロセス
US9877741B2 (en) 2013-09-09 2018-01-30 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
WO2015034530A1 (fr) * 2013-09-09 2015-03-12 Levy Dara Dispositif portatif de dermaplaning et procédé de dermaplaning
US10111681B2 (en) 2013-09-09 2018-10-30 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
US10363059B2 (en) 2013-09-09 2019-07-30 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
US10441307B2 (en) 2013-09-09 2019-10-15 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
US10842521B2 (en) 2013-09-09 2020-11-24 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
US10993519B2 (en) 2013-09-09 2021-05-04 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
US12507783B2 (en) 2013-09-09 2025-12-30 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
KR20180123662A (ko) * 2015-12-21 2018-11-19 디디 카르마 엘엘씨 파지형 더마플래닝 장치 및 더마플래닝 처리

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