EP1007297B1 - Safety razors - Google Patents
Safety razors Download PDFInfo
- Publication number
- EP1007297B1 EP1007297B1 EP98905052A EP98905052A EP1007297B1 EP 1007297 B1 EP1007297 B1 EP 1007297B1 EP 98905052 A EP98905052 A EP 98905052A EP 98905052 A EP98905052 A EP 98905052A EP 1007297 B1 EP1007297 B1 EP 1007297B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- elements
- safety razor
- unit according
- blade unit
- 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
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
-
- 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
- B26B21/227—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 with blades being resiliently mounted in the changeable unit
Definitions
- This invention relates to safety razors and in particular it refers to a safety razor blade unit having at least one blade with a cutting edge which is moved across the surface of the skin being shaved by means of a handle to which the blade unit is attached.
- the blade unit may be mounted on the handle to enable the blade unit to be replaced by a fresh blade unit when required. Replacement blade units are also commonly referred to as cartridges.
- a blade unit may be attached permanently to the handle with the intention that the entire razor should be discarded when the blade or blades have become dulled.
- Razor blade units generally include guard and cap surfaces for respectively contacting the skin in front of and behind the blade(s), these surfaces serving important roles in establishing the so-called shaving geometry, i.e. the parameters which determine the blade orientation and position relative to the skin during shaving.
- the prior art blade units having comb structures are equipped with fixed blades and are not easily adaptable to suit blade units in which blades are mounted to be movable under forces experienced during shaving in order to vary the shaving geometry.
- U.S. Patent No. 4,378,633 discloses a razor blade assembly having blade members that are independently movable with respect to a frame in response to forces encountered during a shaving operation.
- the preamble of claim 1 is based upon the disclosure of US-A-4 378 633.
- a safety razor blade unit including a frame with guard and cap surfaces thereon, a plurality of blades with substantially parallel blade edges mounted on the frame between the guard and cap surfaces, the blades being carried on respective blade supports for independent movement within the frame for varying the shaving geometry in accordance with forces imparted on the blades during shaving, characterized in that at least one of the blade supports has rigidly connected thereto elements spaced apart along the blade carried on said blade support and projecting forwardly of the blade edge, the elements having skin contacting portions for contacting the skin immediately in front of the blade and substantially tangential to the blade edge.
- the blade units having comb structures according to the prior art compromise closeness in attempting to improve safety and comfort. It has been found that excellent closeness results can be achieved while still benefiting from enhanced safety and comfort, with a preferred embodiment of a safety razor blade unit according to the invention.
- the forwardly projecting elements have upper surface portions which in side elevation extend rectilinearly to a point spaced from the blade edge by a distance in the range of 0.10 to 0.30 mm.
- the projecting elements are preferably integral with the blade support, although they can be formed on a member firmly secured to the blade support. In either case the elements can be easily and conveniently incorporated in a blade unit having blades which are movable, and the elements remain effective despite the blade movements which occur during shaving.
- the elements have skin contacting surfaces which are closely adjacent the blade edge in all cases. Due to the upper surface portions, which can be flat or arched, lying substantially in a common plane with the blade edge, the elements have a tendency to function in similar fashion to skis or runners as they slide over the skin surface thereby guiding the blade for effective contact with the skin while deterring any tendency for blade displacement in a direction longitudinally of the blade edge.
- the projecting elements have flat sides and the lateral edges of the upper surface portions merge smoothly with radiused or divergent flank surfaces extending to the flat sides.
- the width of the elements is in the range of 0.1 to 0.3 mm, and the width of the upper skin contacting surface portions is not greater than 0.1 mm, which avoids any tendency for the elements to flatten the hairs against the skin surface.
- the elements are preferably positioned with a pitch of less than 2 mm, e.g. in the range of 0.5 mm to 1.5, and a pitch of approximately 1.0 mm is especially appropriate.
- FIG. 1 Illustrated in Figure 1 is a safety razor blade unit or cartridge having a moulded plastics frame 1 on which guard and cap surfaces are provided and which respectively include a strip 2 of elastomeric material with longitudinal fins, and a strip 3 of lubricating material, both fixedly attached to the frame.
- a strip 2 of elastomeric material with longitudinal fins and a strip 3 of lubricating material, both fixedly attached to the frame.
- Mounted between the guard and cap are three parallel blades 4 with forwardly directed cutting edges positioned in series between the guard and cap.
- Each blade 4 is fixedly connected to a blade support 5, and in a manner known per se the ends of the blade supports are connected to the frame to enable movement of the blades relative to the frame against the action of springs (not shown) and under forces imparted against the blades during shaving.
- each blade support 5 includes a generally upright beam portion 10 from the upper edge of which extends a forwardly and upwardly inclined blade platform 11 against the upper surface of which the blade 4 is fixed, such as by spot welding.
- a forwardly and upwardly inclined blade platform 11 against the upper surface of which the blade 4 is fixed, such as by spot welding.
- integral comb elements 12 which are perpendicular to the blade edge.
- elements 12 have flat sides, at least along the sections which protrude forwardly of the blade edge, and the elements have flat upper surface portions 14 which are connected to the side faces by radiused edges 15.
- the leading ends of the elements 12 located forwardly of the upper surface portions 14 have rounded noses 16 which lead smoothly into the surface portions 14.
- the root portions 17 of the elements 12 have upper surfaces which are inclined more steeply than the blade platform surface in order to follow closely the edge facet at the underside of the blade 4, although this is not essential and a larger spacing between the underside of the blade and the elements is acceptable.
- the rear or trailing ends of the upper surface portions 14 are closely adjacent the blade edge, the width of the gap therebetween being several times less than the distance A ( Figure 3) from the blade edge to the forward or leading ends of the surface portions 14.
- the surface portions 14 of all the elements on the blade support lie in a common plane which is tangential to, i.e. contains the edge of the blade carried on the support.
- the distance A is in the range of 0.10 to 0.3 mm, more especially from 0.15 to 0.2 mm.
- the width of the elements between their flat lateral faces is in the range 0.5 to 1.5 mm, for example about 1.0 mm, and the elements are positioned at a pitch of 1.0 mm.
- the projecting elements 12 of the blade supports have a guiding effect influencing the blade unit to move over the skin in a direction perpendicular to the blade edges, the elements acting in similar manner to skis or runners sliding over the skin surface. Thereby enhanced safety and comfort can be obtained.
- the elements 12 ensure an effective cooperation of the blades with the skin surface leading to excellent shaving results in terms of closeness.
- FIG. 5 to 9 Illustrated in Figures 5 to 9 is a modified blade support which could be used with any one or more of the blades in the safety razor blade unit of Figure 1.
- the modified blade support is the same as that described with reference to Figures 2 to 4, except that the shape of the forwardly projecting elements 22 is different.
- the elements instead of having flat upper surface portions, the elements have arched central upper surface portions 24 having a radius of curvature of about 0.07 mm, the lateral edges of which merge smoothly with divergent flank surfaces 25 which extend to the flat side faces.
- the crests of the arched upper surface portions extend rectilinearly to a point 27 whereat these surface portions merge smoothly with rounded noses 26.
- FIG. 10 to 12 there is illustrated a razor blade and blade support assembly in which instead of being integral with the blade support as in the embodiments of Figures 1-9, the elements 32 projecting forwardly of the blade edge are formed on a separate injection moulded plastics member 30 which is fixed securely to the blade support 31.
- the moulded member 30 has spaced along its length integral pegs or studs 34 which are inserted through corresponding holes 35 provided in the blade support, the protruding free ends of the studs being deformed such as by application of heat and pressure so that they are radially enlarged to the rear of the blade support and hence fasten the moulded member to the blade support.
- the upper edge of the moulded member is shaped to follow the contour of the blade support on the underside of the portion which carries the blade 36, and the elements 32 project forwardly from this upper edge.
- the rear end upper faces of the member 30 define two surfaces for abutment with the blade support 31 to assist in ensuring accurate alignment of the projecting elements with the blade support and hence the cutting edge of the blade 36.
- the projecting elements 32 may have the same shape and dimensions as the elements 22 of the blade support described above with reference to Figures 5-9, and they are preferably positioned in relation to the sharpened edge of the blade 36, also as described above in relation to the earlier embodiments.
- the blade and support assembly of Figures 10-12 can be used as one or more of the blade and support assemblies in the razor blade unit of Figure 1.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dry Shavers And Clippers (AREA)
- Cosmetics (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
- Knives (AREA)
- Prostheses (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Hall/Mr Elements (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9703293 | 1997-02-18 | ||
GBGB9703293.2A GB9703293D0 (en) | 1997-02-18 | 1997-02-18 | Safety razors |
PCT/US1998/002675 WO1998035795A1 (en) | 1997-02-18 | 1998-02-13 | Safety razors |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1007297A1 EP1007297A1 (en) | 2000-06-14 |
EP1007297B1 true EP1007297B1 (en) | 2002-08-28 |
Family
ID=10807822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98905052A Expired - Lifetime EP1007297B1 (en) | 1997-02-18 | 1998-02-13 | Safety razors |
Country Status (29)
Country | Link |
---|---|
EP (1) | EP1007297B1 (ru) |
JP (1) | JP4201842B2 (ru) |
KR (1) | KR100539658B1 (ru) |
CN (1) | CN1080169C (ru) |
AR (1) | AR011824A1 (ru) |
AT (1) | ATE222842T1 (ru) |
AU (1) | AU724961B2 (ru) |
BR (1) | BR9807229A (ru) |
CA (1) | CA2278806C (ru) |
CO (1) | CO4761086A1 (ru) |
CZ (1) | CZ293915B6 (ru) |
DE (1) | DE69807495T2 (ru) |
ES (1) | ES2182269T3 (ru) |
GB (1) | GB9703293D0 (ru) |
HK (1) | HK1025071A1 (ru) |
HU (1) | HU223834B1 (ru) |
ID (1) | ID22918A (ru) |
IL (1) | IL131187A (ru) |
NO (1) | NO322846B1 (ru) |
NZ (1) | NZ337014A (ru) |
PL (1) | PL186889B1 (ru) |
PT (1) | PT1007297E (ru) |
RO (1) | RO120325B1 (ru) |
RU (1) | RU2181324C2 (ru) |
SK (1) | SK285265B6 (ru) |
TR (1) | TR199901981T2 (ru) |
UA (1) | UA54495C2 (ru) |
WO (1) | WO1998035795A1 (ru) |
YU (1) | YU38899A (ru) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2354474B8 (en) * | 1999-09-27 | 2008-01-29 | Gillette Co | Safety razors |
EP1410884B1 (en) | 2002-10-08 | 2006-03-22 | The Gillette Company | Shaving system for performing multiple shaving actions |
US8056238B2 (en) * | 2004-02-05 | 2011-11-15 | Koninklijke Philips Electronics N.V. | Shaving head having a blade supporting member with reduced cross-sectional area |
JP4950507B2 (ja) | 2006-02-14 | 2012-06-13 | 株式会社貝印刃物開発センター | 剃刀 |
JP4950506B2 (ja) | 2006-02-14 | 2012-06-13 | 株式会社貝印刃物開発センター | 剃刀 |
JP4977374B2 (ja) | 2006-02-14 | 2012-07-18 | 株式会社貝印刃物開発センター | 剃刀 |
BRPI0924595B1 (pt) | 2009-04-15 | 2020-10-27 | Bic-Violex Sa | método de fabricar um componente de cabeça de barbeador, cartucho de barbeador, barbeador mecânico compreendendo tal cartucho de barbeador e suporte adaptado para receber uma lâmina de barbeador |
IN2012DN05165A (ru) * | 2009-12-18 | 2015-10-23 | Gillette Co | |
EP2537648B1 (en) * | 2011-06-20 | 2016-04-20 | The Gillette Company | Razor cartridge with skin contact element |
US20140026424A1 (en) * | 2012-07-24 | 2014-01-30 | The Gillette Company | Razor cartridge |
PL3177438T3 (pl) * | 2014-08-07 | 2019-09-30 | Bic-Violex S.A. | Układ ostrza przycinającego i maszynka do golenia zawierająca taki układ ostrza przycinającego |
US10773404B2 (en) * | 2015-05-13 | 2020-09-15 | The Gillette Company Llc | Shaving razor cartridge |
DE102016110239A1 (de) | 2016-06-02 | 2017-12-07 | Wladimir Mor | Scherkopf für einen nassrasierer |
US11446835B2 (en) | 2019-07-15 | 2022-09-20 | The Gillette Company Llc | Shaving razor cartridge |
EP3771531B1 (en) * | 2019-07-31 | 2024-07-24 | BIC Violex Single Member S.A. | Razor cartridge |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3004337A (en) | 1959-06-15 | 1961-10-17 | Walter O Schweizer | Razor having a bifurcated blade-supporting means |
CA1102537A (en) * | 1977-09-08 | 1981-06-09 | Frank A. Ferraro | Shaving cartridge |
US4378633A (en) * | 1979-12-07 | 1983-04-05 | The Gillette Company | Razor blade assembly |
ATE106790T1 (de) * | 1990-09-18 | 1994-06-15 | Kai Ind Co Ltd | Klingeneinheit mit führungs/schutz-element. |
GB2265565B (en) * | 1992-03-28 | 1995-03-22 | Wilkinson Sword Gmbh | Razor head of a wet razor |
-
1997
- 1997-02-18 GB GBGB9703293.2A patent/GB9703293D0/en active Pending
-
1998
- 1998-02-13 CZ CZ19992686A patent/CZ293915B6/cs not_active IP Right Cessation
- 1998-02-13 RU RU99120073/12A patent/RU2181324C2/ru active
- 1998-02-13 TR TR1999/01981T patent/TR199901981T2/xx unknown
- 1998-02-13 NZ NZ337014A patent/NZ337014A/en unknown
- 1998-02-13 PL PL98335080A patent/PL186889B1/pl not_active IP Right Cessation
- 1998-02-13 PT PT98905052T patent/PT1007297E/pt unknown
- 1998-02-13 YU YU38899A patent/YU38899A/sh unknown
- 1998-02-13 BR BR9807229-3A patent/BR9807229A/pt not_active IP Right Cessation
- 1998-02-13 JP JP53588198A patent/JP4201842B2/ja not_active Expired - Lifetime
- 1998-02-13 DE DE69807495T patent/DE69807495T2/de not_active Expired - Lifetime
- 1998-02-13 EP EP98905052A patent/EP1007297B1/en not_active Expired - Lifetime
- 1998-02-13 AT AT98905052T patent/ATE222842T1/de not_active IP Right Cessation
- 1998-02-13 WO PCT/US1998/002675 patent/WO1998035795A1/en active IP Right Grant
- 1998-02-13 IL IL13118798A patent/IL131187A/en not_active IP Right Cessation
- 1998-02-13 KR KR10-1999-7007399A patent/KR100539658B1/ko not_active IP Right Cessation
- 1998-02-13 HU HU0002011A patent/HU223834B1/hu not_active IP Right Cessation
- 1998-02-13 CA CA002278806A patent/CA2278806C/en not_active Expired - Fee Related
- 1998-02-13 RO RO99-00908A patent/RO120325B1/ro unknown
- 1998-02-13 ID IDW990866A patent/ID22918A/id unknown
- 1998-02-13 CN CN98802646A patent/CN1080169C/zh not_active Expired - Lifetime
- 1998-02-13 AU AU62764/98A patent/AU724961B2/en not_active Ceased
- 1998-02-13 SK SK1033-99A patent/SK285265B6/sk not_active IP Right Cessation
- 1998-02-13 UA UA99095166A patent/UA54495C2/ru unknown
- 1998-02-13 ES ES98905052T patent/ES2182269T3/es not_active Expired - Lifetime
- 1998-02-16 CO CO98007942A patent/CO4761086A1/es unknown
- 1998-02-18 AR ARP980100710A patent/AR011824A1/es unknown
-
1999
- 1999-08-13 NO NO19993918A patent/NO322846B1/no unknown
-
2000
- 2000-07-19 HK HK00104422A patent/HK1025071A1/xx not_active IP Right Cessation
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