EP0073852B1 - Rasierapparat - Google Patents

Rasierapparat Download PDF

Info

Publication number
EP0073852B1
EP0073852B1 EP81109395A EP81109395A EP0073852B1 EP 0073852 B1 EP0073852 B1 EP 0073852B1 EP 81109395 A EP81109395 A EP 81109395A EP 81109395 A EP81109395 A EP 81109395A EP 0073852 B1 EP0073852 B1 EP 0073852B1
Authority
EP
European Patent Office
Prior art keywords
blade
exp
exposure
cutting edge
skin
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
Application number
EP81109395A
Other languages
English (en)
French (fr)
Other versions
EP0073852A2 (de
EP0073852A3 (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 US06/298,728 external-priority patent/US4407067A/en
Application filed by Gillette Co LLC filed Critical Gillette Co LLC
Priority to AT81109395T priority Critical patent/ATE11655T1/de
Publication of EP0073852A2 publication Critical patent/EP0073852A2/de
Publication of EP0073852A3 publication Critical patent/EP0073852A3/en
Application granted granted Critical
Publication of EP0073852B1 publication Critical patent/EP0073852B1/de
Expired legal-status Critical Current

Links

Images

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
    • B26B21/08—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
    • 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

Definitions

  • the invention relates to wet shaving implements and is directed more particularly to a wet shaving implement in which there is a plurality of blades.
  • plastic shaving heads having blades fixed therein include US-A-3,703,764, US-A-3,724,070, and US-A-4,026,016. While such recent examples have been eminently successful, there is, as always, a need for such products which are less expensive to manufacture and offer improved functional characteristics.
  • US-A-3,786,563 discloses geometrical relationships present in plural cutting edge systems. Among the important parameters of plural edge systems are "blade tangent angle”, “exposure”, and "span”.
  • Such a shaving system includes two cutting edges disposed parallel to one another and in spaced relation to provide leading and following cutting edges so that both cutting edges are successively active with respect to the hair elements being cut during a single shaving stroke.
  • the cutting edges are supported in spaced parallel relation to one another.
  • a guard structure is disposed in fixed relation to the cutting edges to define in part the desired geometrical relationship.
  • Significant components of the geometical relationship include the above referred to "blade tangent angle", "exposure”, and "span”.
  • the "blade tangent angle” being 2O°­-32° is defined as the angle between the bisector of the included angle of a cutting edge and a line from the cutting edge tangent to the skin engaging surface immediately forward of that cutting edge.
  • the "exposure” being 0.0381 ⁇ 0.0381 mm is defined as the distance from a cutting edge to a plane defined by skin engaging surfaces immediately in front of and behind the cutting edge the distance being measured perpendicularly to the reference 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 "span” being in the range of 0.762-2.032 mm is defined as the distance between the cutting edge and the skin engaging surface forward of that cutting edge.
  • a further object of the invention is to provide such a system in which a plurality of cutting edges are fixed in a position with respect to one another and with respect to a cooperating guard structure and cap structure to define a desired geometrical relationship between various components of the system.
  • a still further object is to provide such a shaving system in which at least one of the parameter-determining surfaces is in effect two surfaces alternating in presentation and therefore presenting alternating geometries.
  • a shaving implement comprising a platform member, a cap member, and blade means disposed therebetween, said platform member comprises a blade support portion, a guard portion mounted forwardly of said blade support portion, and a back portion upstanding from said blade support portion, said guard and back portions defining parallel opposite lengthwise edges of said platform member, said cap member comprising a series of fingers extending from said back portion forwardly toward said guard portion, said fingers being separated from each other by recesses therebetween, said fingers including a first skin-engaging point and said recesses being defined in part by a cap member wall comprising a second skin-engaging point, and said blade means comprising a first blade member having a first cutting edge disposed rearwardly of said guard portion, a second blade member having a second cutting edge disposed rearwardly of said first cutting edge, and spacer means for maintaining said first and second blade members in spaced parallel relationship, said first and second cutting edges each having a blade tangent angle in the range of 2C°­
  • the platform member comprises a blade support portion, a guard portion mounted forwardly of the blade support portion and a back portion upstanding therefrom said cap portion extending from the back portion and overlying the platform portion, said cap portion exercising a clamping pressure on the blade means.
  • US-A-3 786 563 discloses a shaving implement having all of the features of the precharacterizing part of Claim 1 except the full range of 20 0- 30 0 for the blade tangent angle of the second cutting edge, only the specific value of 21°50' being mentioned.
  • an illustrative housing 2 includes a platform portion 4.
  • a back portion 6 upstands from a lengthwise margin of the platform portion 4, and a cap portion 8 extends forwardly from the back portion 6 to overlie the platform portion.
  • the housing further includes leg portions 10 extending forwardly from the platform portion and joining a guard portion 12 which is disposed parallel to the back portion 6.
  • the housing is further provided with end walls 14, 16 interconnecting the back and guard portions at the ends of the housing.
  • the cap portion 8 comprises a series of spaced, aligned, forwardly extending fingers 18.
  • the platform portion is provided with a series of spaced, aligned recesses 20, the recesses being separated by platform rib portions 22.
  • each of the fingers 18 is disposed over one of the recesses 20 and each of the rib portions 22 is in alignment with a space between two of the fingers 18.
  • the entire housing is of molded plastic and is molded as an integral unit.
  • the fingers 18 are in effect leaf springs adapted to flex to receive a blade means between the fingers and the platform and further serve the urge the blade means against an upper surface 24 of the platform portion.
  • the end walls 14, 16 are provided with inwardly extending projections 26 which are opposed to each other, as seen in Figures 1 and 2.
  • the projections provide an additional blade means retention facility.
  • Each projection includes a forward surface 28 extending from the end wall on which the projection is mounted obliquely to a side surface 30.
  • a rear surface 32 interconnects the rearward edge of the side surface and the end wall surface.
  • Each of the fingers 18 includes a guide surface 34, serving to guide a blade means into the gap, or pocket, formed by the platform and back portion and the fingers.
  • the fingers 18 are formed such that while extending forwardly, the fingers also extend slightly downwardly, as viewed in Figures 3 and 4, or toward the platform surface 24.
  • a blade means suitable for use with the above-described housing includes a first blade 40 having a cutting edge 42, and a narrower second blade 44 having a cutting edge 46, the blades 40, 44 being disposed on either side of a spacer member 50.
  • the spacer member 50 includes an elongated central portion 52 and end portions 54 extending forwardly of a frontal edge 56 of the central portion 52 and having outwardly-facing notches 58 therein adapted to receive the projections 26.
  • the notches 58 are defined in part by extensions 60, each having a cam surface 62, an outer surface 64, and a notch surface 66.
  • the blade means including the first blade 40, spacer 50, and second blade 44, is inserted between the fingers 18 and the upper surface 24 of the rib portions 22, the finger guide surfaces 34 guiding and urging the blade means into place.
  • the cam surface 62 engages the projection forward surface 28.
  • Continued pressure on the blade means causes the extensions 60 to override the projections 26, with the notches 58 coming to rest about the projections 26, as seen in Figure 6.
  • the housing may be provided with means for attachment to a razor handle. While such means may comprise the well known groove means disclosed in the aforementioned U.S. Patent No. 3,724,070, or journal bearing means as disclosed in the aforementioned U.S. Patent No. 4,026,016, in the embodiment shown in Figures 1-4, the housing is provided with connecting means 70' adapted to be engaged by a razor handle 80.
  • the handle 80 may be of the type permanently connected to the housing 2, or may be of the type selectively connected and disconnected to and from the handle.
  • the connecting means 70' or the handle 80 may be molded integrally with the above-described housing.
  • the BTA of the first, or leading, blade, BTA I is generated by a line a-b bisecting the included angle of the first blade 40 and extending from the first blade cutting edge 42. In the case of blades having symmetrical edges, the line a-b will be an extension of the plane of the first blade.
  • the angle BTA 1 is completed by a second line a-c, extending from the first blade cutting edge 42 to a tangent point c on the guard portion 12.
  • the second, or following, blade tangent angle, BTA 2 is defined by a line e-f, similar to the line a-b, and a line e-a extending from the second blade cutting edge 46 to a tangent point immediately preceding to second cutting edge, which in a tandem blade system, is the preceding cutting edge 42.
  • BTA 1 and BTA 2 fall within the range of 20° ⁇ 32°.
  • the S of the first, or leading, blade, S 1 is the distance between the first blade cutting edge 42 and the tangent point c of the immediately preceding surface, that is, the guard portion 12.
  • the second, or following, span, S 2 is in the distance between the second blade cutting edge 46 and the tangent point of the immediately preceding surface, namely, the first cutting edge 42.
  • S 1 and S 2 fall within the range of 0,762-2,032 mm.
  • the Exp of the first blade, Exp 1 is determined by extending a line c ⁇ e between the tangent points immediately preceding and following the first cutting edge, that is, from the guard tangent point c to the second blade cutting edge 46.
  • a line h-h is then extended tangent to the first cutting edge 42 and parallel to the line c ⁇ e.
  • the perpendicular distance between the lines c-e and h-h defines Exp'.
  • Exp 1 falls within the range of 0,0381+0,0381 mm.
  • Exp 2 The Exp of the second blade, Exp 2 , alternates along the length of the second blade 44, providing alternating second blade exposures Exp 2a and Exp 2b .
  • a line a ⁇ o is extended between tangent points immediately preceding and following the second cutting edge 46, namely, the first cutting edge 42 and a first cap tangent point o on the fingers 18.
  • a line j-j is then extended tangent to the second cutting edge 46 and parallel with the line a-o.
  • Exp 2a is the perpendicular distance between the lines a-o and j-j.
  • a line a-p is extended between the first cutting edge 42 and a second cap tangent point p disposed in the recesses between the fingers 18 and located at the top of cap member wall 70 of each recess.
  • a line 1-1 is then extended tangent to the second cutting edge 46 and parallel with the line a-p.
  • Exp 2b is the perpendicular distance between the lines a-p and I-I.
  • Exp 2a falls the range of 0.0508 ⁇ 0.0508 mm and Exp 2b falls within the range 0.1016+0.0508 mm Exp 2b being always larger than Exp 2a in a given device.
  • the fingers 18 be separated by a distance permitting of entry of skin therebetween during a shaving operation.
  • the distance between the fingers 18 ought to be spaced from each other by at least 0.508 mm, but not more than 2.032 mm.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Semiconductor Lasers (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Led Devices (AREA)
  • Cosmetics (AREA)

Claims (5)

1. Naßrasierapparat mit einem Plattformglied (4), einer Kappe (8) und einer dazwischen befindlichen Klingeneinrichtung, die eine erste Klinge (40) mit einer hinter einem Schutzglied (12) angeordneten ersten Schneidkante (42), eine zweite Klinge mit einer hinter der ersten Schneidkante (42) angeordneten zweiten Schneidkante (46) und einen Abstandhalter (50) zum Aufrechterhalten eines parallelen Lageverhältnisses zwischen der ersten und der zweiten Klinge (40, 44) umfaßt, wobei die erste und zweite Schneidkante (42, 46) jeweils einen Klingentangentialwinkel (BTA1, BTA2) im Bereich von 20° bis 32° und eine freie Spannlänge (S1, S2) im Bereich von 0,762-2,032 mm einnimmt, und wobei die erste Klinge (40) eine Freilage von 0,0381±0,0381 mm hat und das Plattformglied (14) ein Klingenstützteil umfaßt, das genannte Schutzglied (12) vor dem Klingenstützteil befestigt und ein hinteres Teil (6) vom Klingenstützteil nach oben wegsteht, wobei das Schutzglied (12) und das hintere Teil (6) parallel gegenüberliegende Längsränder des Plattformgliedes (4) bilden, dadurch gekennzeichnet, daß die Kappe (8) eine Reihe von Fingern (18) umfaßt, die vom hinteren Teil (6) zum Schutzglied (12) nach vorne verlaufen, durch dazwischen befindliche Ausnehmungen (20) voneinander getrennt und einen ersten Hautanlagepunkt (o) umfaßt, daß die Ausnehmungen (20) teilweise von einer Kappenwand (70) gebildet sind, die einen zweiten Hautanlagepunkt (p) umfaßt, daß die zweite Klinge (44) entlang ihrer Länge eine erste und zweite Freilage (Exp2", Exp2b) bildet, wovon die erste Freilage (Exp2a) durch eine erste Tangentenlinie (a-o) bestimmt wird, die von der ersten Schneidkante (42; a) zum ersten Hautanlagepunkt (o) verläuft, und von denen die zweite Freilage (Exp2b) durch eine zweite Tangentenlinie (a-p) bestimmt wird, die von der ersten Schneidkante (42; a) zum zweiten Hautanlagepunkt (p) verläuft, und daß die erste Freilage (Exp2a) 0,0508±0,0508 mm und die zweite Freilage (Exp2b) 0,1016±0,0508 mm beträgt, wobei die zweite Freilage (Exp2b) stets größer ist als die erste Freilage (Exp2a).
2. Rasierapparat nach Anspruch 1, dadurch gekennzeichnet, daß die nach vorne verlaufenden Finger (18) um zumindest 0,508 mm und nicht mehr als 2,032 mm voneinander beabstandet sind.
3. Rasierapparat nach Anspruch 1, dadurch gekennzeichnet, daß das Plattformglied (4) weiterhin einen Verbindungsabschnitt zum lösbaren Verbinden des Rasierapparates mit einem Rasierapparathandgriff (80) umfaßt.
4. Rasierapparat nach Anspruch 1, dadurch gekennzeichnet, daß das Plattformglied (4) weiterhin einen Handgriffabschnitt umfaßt.
5. Rasierapparat nach Anspruch 1, 3 oder 4, dadurch gekennzeichnet, daß die Kappe (8) und das Plattformglied (4) eine integriert gegossene Kunststoffeinheit bilden, die dazu geeignet ist, darin die Klingeneinrichtung zu halten.
EP81109395A 1981-09-03 1981-10-30 Rasierapparat Expired EP0073852B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81109395T ATE11655T1 (de) 1981-09-03 1981-10-30 Rasierapparat.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/298,728 US4407067A (en) 1980-10-06 1981-09-03 Shaving implement
US298728 1981-09-03

Publications (3)

Publication Number Publication Date
EP0073852A2 EP0073852A2 (de) 1983-03-16
EP0073852A3 EP0073852A3 (en) 1983-07-20
EP0073852B1 true EP0073852B1 (de) 1985-02-06

Family

ID=23151787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109395A Expired EP0073852B1 (de) 1981-09-03 1981-10-30 Rasierapparat

Country Status (4)

Country Link
EP (1) EP0073852B1 (de)
KR (1) KR880002343B1 (de)
AT (1) ATE11655T1 (de)
DE (1) DE3168824D1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265565B (en) * 1992-03-28 1995-03-22 Wilkinson Sword Gmbh Razor head of a wet razor
GB2354474B8 (en) 1999-09-27 2008-01-29 Gillette Co Safety razors
US20050015991A1 (en) * 2002-04-24 2005-01-27 Eveready Battery Company, Inc. Razor cartridge
WO2020257435A1 (en) * 2019-06-21 2020-12-24 The Gillette Company Llc Razor cartridge with one or more skin support elements

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073853A2 (de) * 1981-09-03 1983-03-16 The Gillette Company Rasierapparat

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374612A (en) * 1944-01-29 1945-04-24 Joseph M Mellon Safety razor
US3786563A (en) * 1971-08-31 1974-01-22 Gillette Co Shaving system
US4146958A (en) * 1976-10-15 1979-04-03 Warner-Lambert Company Safety razor
CA1102537A (en) * 1977-09-08 1981-06-09 Frank A. Ferraro Shaving cartridge
GB1593979A (en) * 1978-05-30 1981-07-22 Gillette Co Safety razor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073853A2 (de) * 1981-09-03 1983-03-16 The Gillette Company Rasierapparat

Also Published As

Publication number Publication date
EP0073852A2 (de) 1983-03-16
ATE11655T1 (de) 1985-02-15
EP0073852A3 (en) 1983-07-20
KR880002343B1 (ko) 1988-10-26
KR830007037A (ko) 1983-10-14
DE3168824D1 (en) 1985-03-21

Similar Documents

Publication Publication Date Title
US4407067A (en) Shaving implement
CA2292022C (en) Razors
EP1015193B1 (de) Sicherheitsrasierer
US4335508A (en) Safety razor heads
US4288920A (en) Shaving system with pivotally mounted razor cartridge
US4354312A (en) Shaving implement, housing therefor, and razor
US20040181954A1 (en) Shaving implement having improved pivot axis location
GB1566505A (en) Safety razor
GB2086298A (en) Safety razors
EP1007297B1 (de) Sicherheitsrasierer
US4283850A (en) Razor blade assembly with a removable blade cartridge
US4282650A (en) Razor blade assembly
EP0073852B1 (de) Rasierapparat
GB2087287A (en) Safety razors
EP0073853B1 (de) Rasierapparat
EP0025326A1 (de) Rasierhobelsystem

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): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19830629

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 11655

Country of ref document: AT

Date of ref document: 19850215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3168824

Country of ref document: DE

Date of ref document: 19850321

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19881031

Ref country code: LI

Effective date: 19881031

Ref country code: CH

Effective date: 19881031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881121

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ITTA It: last paid annual fee
EUG Se: european patent has lapsed

Ref document number: 81109395.4

Effective date: 19890614

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19981002

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19981021

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990930

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19991001

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19991007

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991030

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991031

BERE Be: lapsed

Owner name: THE GILLETTE CY

Effective date: 19991031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010629

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20010501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010703

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST