EP0148515A1 - Tête de coupe de rasoir à sec avec une feuille coupante tendue courbée - Google Patents

Tête de coupe de rasoir à sec avec une feuille coupante tendue courbée Download PDF

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Publication number
EP0148515A1
EP0148515A1 EP84201598A EP84201598A EP0148515A1 EP 0148515 A1 EP0148515 A1 EP 0148515A1 EP 84201598 A EP84201598 A EP 84201598A EP 84201598 A EP84201598 A EP 84201598A EP 0148515 A1 EP0148515 A1 EP 0148515A1
Authority
EP
European Patent Office
Prior art keywords
shaving
curvature
clamping
foil
clamped
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
EP84201598A
Other languages
German (de)
English (en)
Other versions
EP0148515B1 (fr
Inventor
Hugo Dr. Schemmann
Romuald Leander Bukoschek
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6213961&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0148515(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Priority to AT84201598T priority Critical patent/ATE25611T1/de
Publication of EP0148515A1 publication Critical patent/EP0148515A1/fr
Application granted granted Critical
Publication of EP0148515B1 publication Critical patent/EP0148515B1/fr
Expired 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
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof

Definitions

  • the invention relates to a shaving head of a dry shaving apparatus with a curved clamped shaving foil and a lower knife that is movable along the shaving foil and also curved on the cutting side, the shaving foil being clamped not far from the cutting area end of the lower knife and the tangents to the film curvature in the clamping points Include angles.
  • Such a shaving head is generally known.
  • the shear surface of the lower knife has either a circular arc or a semi-elliptical shape in cross section (DE-PS 932 172).
  • the shaving foil is stretched over the lower knife. This generally results in two approximately strip-shaped contact surfaces on both sides of the center of the shaving head. These contact surfaces shrink even more when the radius of the arc is reduced.
  • the bottom knife only rests in a single narrow strip on the inside of the curved shaving foil.
  • An elliptical shape is too narrow in the lower area, the gap between the lower knife and the shaving foil is unnecessarily large. There is increased wear, particularly where the lower knife lifts off from the shaving foil.
  • AT-PS 292 502 also shows a foil bottom knife.
  • the mushroom-shaped foil bottom knife offers even less resistance when the shaving head is pressed against the skin.
  • the object is achieved according to the invention in that the curvature of the cutting side of the lamellar bottom knife is adapted substantially over its entire cutting area to a self-forming curvature of the shaving foil solely as a result of its clamping.
  • the main idea here is not to force the shaving foil onto the shape of the bottom knife, but rather, conversely, to adapt the shape of the ground, rigid bottom knife to the clamping shape of the shaving foil.
  • Such a shaving head can work with a lower contact pressure of the lower knife and therefore requires less drive power because the friction can be kept low.
  • the drive power is used for shaving, not for heat generation. There can also be less skin irritation and the overall shaving result is significantly improved.
  • the smoothness of the shave improves - the shaving time becomes shorter and hair lying on the neck is cut better.
  • the constant c is determined at the intersection of the functions and where h is the height of the curvature of a clamped film between the clamping points and the highest point of the film and b is half the distance between the clamping points.
  • the clamping point has a clamping wall to which the clamped shaving foil is applied from the outside directly next to the clamping, the clamping wall with the connecting line between the clamping points making an angle o c in the amount of approx. sinh b / c.
  • the cutting edge 9 of the lower knife 7 is selected in accordance with this experimentally and mathematically determined clamping shape of the film 5. With such a shaping of the bottom knife 7, it is shown that the bottom knife lies over a large area on the inside of the shaving foil 5 without the need to exert any particular pressure which would deform the shaving foil 5. Deformation forces are hardly exerted by the lower knife 7 on the shaving foil 5.
  • the shaving head is particularly suitable for relatively narrow training.
  • a relatively narrow shaving head is to be understood to mean, for example, a shaving head in which the extension in the x-axis is, for example, approximately 2 ⁇ 6 mm.
  • the constant c ie the distance between the zero point and the saddle point 11 of the cosine-hyperbolic curve, is, for example, in the case of the shear sheet data selected here 3.5 mm.
  • y c. Cosh x / c, y always specifies the distance of the individual points of the cosine-hyperbolic curve from the x-axis.
  • the angle ⁇ of the film edge clamping relative to the imaginary connecting line 13 between the clamping is approx. sinh b / c. In the embodiment, this results in an angle of approximately 71.23 0th

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
EP84201598A 1983-11-10 1984-11-05 Tête de coupe de rasoir à sec avec une feuille coupante tendue courbée Expired EP0148515B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84201598T ATE25611T1 (de) 1983-11-10 1984-11-05 Scherkopf eines trockenrasierapparates mit einer gekruemmt eingespannten scherfolie.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3340661 1983-11-10
DE3340661A DE3340661C2 (de) 1983-11-10 1983-11-10 Scherkopf für einen Trockenrasierapparat mit einer gekrümmt eingespannten Scherfolie

Publications (2)

Publication Number Publication Date
EP0148515A1 true EP0148515A1 (fr) 1985-07-17
EP0148515B1 EP0148515B1 (fr) 1987-03-04

Family

ID=6213961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201598A Expired EP0148515B1 (fr) 1983-11-10 1984-11-05 Tête de coupe de rasoir à sec avec une feuille coupante tendue courbée

Country Status (6)

Country Link
US (1) US4621423A (fr)
EP (1) EP0148515B1 (fr)
JP (1) JPS60116393A (fr)
AT (1) ATE25611T1 (fr)
CA (1) CA1236280A (fr)
DE (2) DE3340661C2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3601202A1 (de) * 1986-01-17 1987-07-23 Philips Patentverwaltung Verfahren zum ausbilden eines bevorzugten scheraktiven bereichs im scherkopf eines trockenrasierapparates
AT398719B (de) * 1992-07-24 1995-01-25 Philips Nv Rasierapparat mit einem scherkopfrahmen und einem an diesem festhaltbaren folienrahmen
AT398720B (de) * 1992-07-24 1995-01-25 Koninkl Philips Electronics Nv Rasierapparat mit einem scherkopfrahmen und einem an diesen angefederten folienrahmen
US7845079B2 (en) * 2005-07-29 2010-12-07 The Gillette Company Shaving foil
US20070022606A1 (en) * 2005-07-29 2007-02-01 Mcguire Kenneth S Shaving foil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT265902B (de) * 1964-11-13 1968-10-25 Payer Lux Scherkopf für Trockenrasierapparate
DE2329616A1 (de) * 1973-05-08 1974-11-28 Jura Elektroapparate Fab Trockenrasierapparat
AT352582B (de) * 1975-01-27 1979-09-25 Matsushita Elctric Works Ltd Elektrischer trockenrasierapparat

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069500B (fr) * 1957-05-02 1959-11-19
DE1174208B (de) * 1961-09-07 1964-07-16 Siemens Elektrogeraete Gmbh Trockenrasiergeraet fuer hin- und hergehende Arbeitsbewegung
DE1168290B (de) * 1962-07-18 1964-04-16 Braun Ag Motorisch betriebener Trockenrasierapparat
ZA702622B (en) * 1969-05-12 1971-05-27 American Cyanamid Co Process for producing an acrylic synthetic fiber having a non-circular cross-section
DE2139419A1 (de) * 1970-09-14 1972-03-23 Braun Ag, 6000 Frankfurt Elektrisch angetriebener Rasierapparat
NL7108090A (fr) * 1971-06-12 1972-12-14
NL7405554A (nl) * 1974-04-25 1975-10-28 Philips Nv Scheerkop ten behoeve van een droogscheer- apparaat.
JPS54136976A (en) * 1978-04-15 1979-10-24 Matsushita Electric Works Ltd Reciprocating type electric shaver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT265902B (de) * 1964-11-13 1968-10-25 Payer Lux Scherkopf für Trockenrasierapparate
DE2329616A1 (de) * 1973-05-08 1974-11-28 Jura Elektroapparate Fab Trockenrasierapparat
AT352582B (de) * 1975-01-27 1979-09-25 Matsushita Elctric Works Ltd Elektrischer trockenrasierapparat

Also Published As

Publication number Publication date
ATE25611T1 (de) 1987-03-15
JPS60116393A (ja) 1985-06-22
DE3340661A1 (de) 1985-05-30
DE3462450D1 (en) 1987-04-09
US4621423A (en) 1986-11-11
CA1236280A (fr) 1988-05-10
DE3340661C2 (de) 1991-03-07
EP0148515B1 (fr) 1987-03-04

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