Razor Blade Patents (Class 30/346.5)
  • Patent number: 10843355
    Abstract: An integrally formed rigid razor blade is provided. The razor blade includes a cutting edge portion extending along a cutting edge portion axis and having a cutting edge at one end, a base portion extending along a base portion axis, and a bent portion intermediate the cutting edge portion and the base portion. The bent portion has an average radius of curvature of between 0.4 millimeters and 1.00 millimeters. The cutting edge portion has a cantilever dimension which is a constant distance of between 1.1 millimeters and 1.8 millimeters when measured from the cutting edge portion to the base portion axis.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: November 24, 2020
    Assignee: BIC-VIOLEX SA
    Inventors: Vasileios Davos, Vassilis Papachristos, Dimitrios Efthimiadis, Panagiotis Zafiropoulos, Nikolaos Skounakis, Ioannis Komianos, Michalis Karoussis, Anastasios Papageorgiou
  • Patent number: 10500745
    Abstract: An integrally formed rigid razor blade has, in cross-section transverse to a longitudinal axis, a cutting edge portion, a base portion, and a bent portion. The cutting edge portion extends along a cutting edge portion axis and has a cutting edge at one end. The base portion extends along a base portion axis and has a rear edge at one end. The bent portion is intermediate the cutting edge portion and the base portion. The rear edge of the base portion is serrated along the longitudinal axis. The serrations have a height of between 0.13 millimeters and 0.32 millimeters.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: December 10, 2019
    Assignee: BIC VIOLEX SA
    Inventors: Vasileios Davos, Vassilis Papachristos, Dimitrios Efthimiadis, Panagiotis Zafiropoulos, Nikolaos Skounakis, Ioannis Komianos, Michalis Karoussis, Anastasios Papageorgiou
  • Patent number: 10391651
    Abstract: A razor head includes a housing and at least one integrally formed rigid razor blade. The housing has a top face defining a shaving window and an opposed stopping face. The razor blades are freely mounted in the housing and have a cutting edge portion and a guided portion. A bent portion is intermediate the cutting edge portion and the guided portion. A cantilever dimension, measured as the distance between the cutting edge and a guided portion axis, is between 1.1 millimeters and 1.8 millimeters. The guided portion cooperates with a guide so that each blade is independently translatable with respect to the housing along a sliding direction parallel to the guided portion axis under the effect of shaving forces applied to the blade during shaving.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: August 27, 2019
    Assignee: BIC-VIOLEX SA
    Inventors: Vasileios Davos, Vassilis Papachristos, Dimitrios Efthimiadis, Panagiotis Zafiropoulos, Nikolaos Skounakis, Ioannis Komianos, Michalis Karoussis, Anastasios Papageorgiou
  • Patent number: 10118304
    Abstract: The present invention relates to razor blade cutting edges and methods of producing edges exhibiting improved shave performance longevity and lower cutting forces. Conventional razor blades have increasing cutting forces with use due to the outer coating wear and adhesion loss. Blade edges produced according to the novel process exhibit significantly lower cutting forces when subjected to wool felt cutting shaving simulation, which correlates to more comfortable shaves initially and over the life of the blades. The present invention treats razor blade edges having a first adherent polyfluorocarbon coating with a first solvent to partially remove the polyfluorocarbon coating, adds a second polyfluorocarbon coating, heats, and treats the blade edge with a second solvent providing a final blade edge having a thin, uniform polyfluorocarbon coating.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: November 6, 2018
    Assignee: The Gillette Company LLC
    Inventors: Ronald Richard Duff, Jr., John Joseph Nisby, Kenneth James Skrobis, Joseph Allan Depuydt
  • Patent number: 9604377
    Abstract: When two conventional safety razor double-edged blades are superposed on top of each other, there is no space in between them to pass the shaving residues. The presently invented safety razor double-edged blade is equipped with several spaced protuberances on its surface. When two of these present invented blades are overlapped, there is a space between them to pass the shaving residues to be rinsed away by running water. Therefore two, three or more of them can be superposed on a single razor blade holder to allow the user to experience all the benefits of a multi-blade razor cartridge in a safety razor blade system.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: March 28, 2017
    Inventor: Kun Yuan Tong
  • Patent number: 9027443
    Abstract: Razors are described herein. In some instances the razors include a safety razor blade unit that includes a guard, a cap, and at least two blades with parallel sharpened edges located between the guard and cap. A first blade defines a blade edge nearer the guard and a second blade defines a blade edge nearer the cap. The first blade has a cutter force greater than the cutter force of the second blade. In some instances the razors provide a comfortable shave having improved closeness.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: May 12, 2015
    Assignee: The Gillette Company
    Inventors: Andrew Zhuk, Weili Yu, Hoang Mai Trankiem, Neville Sonnenberg, Kevin Leslie Powell, Yiqian Eric Liu, Robert L. Lescanec, Steve S. Hahn, Joseph Allan DePuydt, Cinzia Simonis de Cloke, Alan Crook
  • Publication number: 20150047202
    Abstract: A blade assembly and razor utilizing same are provided. The blade assembly includes at least one blade and an electrode element being electrically insulated from the blade and from a skin surface contactable by the blade. The blade in combination with the electrode form hydroxyl ions near the blade edge during shaving.
    Type: Application
    Filed: August 14, 2014
    Publication date: February 19, 2015
    Inventors: Yossef Rosemberg, Mark Funt
  • Patent number: 8904650
    Abstract: The present invention relates to a cutting tool, in particular in the form of a razor blade, a scalpel, a knife, a machine knife, scissors etc., which has a synthetic diamond layer with a cutting edge. The diamond layer thereby consists of fine-crystalline diamond.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: December 9, 2014
    Assignee: GFD Gesellschaft für Diamantprodukte mbH
    Inventors: André Flöter, Stefan Strobel, Peter Gluche
  • Publication number: 20140230252
    Abstract: An integrally formed rigid razor blade having a body with a cutting edge portion extending about a cutting edge portion plane, and having a cutting edge at one end, a base portion extending along a base portion plane, a bent portion intermediate the cutting edge portion and the base portion. The body is made of martensitic stainless steel that includes mainly iron and between 0.62% and 0.75% of carbon in weight.
    Type: Application
    Filed: October 8, 2012
    Publication date: August 21, 2014
    Inventors: Vasileios Davos, Vassilis Papachristos, Dimitrios Efthimiadis, Panagiotis Zafiropoulos, Nikolaos Skounakis, Ioannis Komianos, Michalis Karoussis, Anastasios Papageorgiou
  • Publication number: 20140090257
    Abstract: The invention discloses isostatic-pressing (IP) applied to polymer (e.g., PTFE) coated razor blade edges to produce thin, dense, and uniform blade edges which in turn exhibit low initial cutting forces correlating with a more comfortable shaves. The isostatic press utilized may be a hot isostatic press (HIP) or cold isostatic press (CIP) or any other isostatic press process. The HIP conditions may include an environment of elevated temperatures and pressures in an inert atmosphere. The HIP conditions may be applied to non-sintered coatings or sintered coatings or before or after a Flutec® process is applied to coatings. CIP conditions may include room temperature and elevated pressure. The polymeric material may be a fluoropolymer or a non-fluoropolymer material or any composite thereof. It may be deposited initially by any method, including but not limited to, dipping, spin coating, sputtering, or thermal Chemical Vapor Deposition (CVD).
    Type: Application
    Filed: December 2, 2013
    Publication date: April 3, 2014
    Applicant: The Gillette Company
    Inventors: Xiandong Wang, Neville Sonnenberg
  • Patent number: 8640344
    Abstract: Cutting members for razors are provided that have a blade portion and a base portion, the blade portion having a cutting edge region terminated at a free end thereof and an opposing non-cutting edge region, the blade portion being bent relative to the base portion in a bent portion spaced from the cutting edge region and adjacent to the non-cutting edge region, wherein the bent portion extends about 108 degrees to about 115 degrees from the base portion, the bent portion having a radius of about 0.30 mm to about 0.45 mm, at least part of the cutting member having a hardness of about hardness of about 540 HV to about 750 HV, and a thickness of the bent portion is less than the average thickness of the cutting member.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: February 4, 2014
    Assignee: The Gillette Company
    Inventors: William Masek, Robert Smith, John L. Maziarz, Joseph A. DePuydt, Ming Laura Xu, Craig Stephen Vickery
  • Publication number: 20130185942
    Abstract: A razor blade includes an edge portion with a cutting edge at a first end of the razor blade; a further portion extending from the edge portion to a second end of the razor blade; and a bridge portion attached to a first portion of the further portion, leaving a second portion of the further portion exposed from the first end to the second end. The edge portion is bent relative to the further portion through an angle of at least 40° in a bending zone spaced from the cutting edge. Further, at least the edge portion has a material structure hardened by a first heat treatment, and the bending zone has a locally re-heated structure.
    Type: Application
    Filed: March 8, 2013
    Publication date: July 25, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: KONINKLIJKE PHILIPS ELECTRONICS N.V.
  • Patent number: 8448544
    Abstract: A method of manufacturing a blade including heating and quenching a coil of strip steel material to harden the material, heating the strip steel material to temper the material, grinding a first angle along an edge of the material, and subsequent to the grinding, re-hardening, for example by induction heating, the edge of the material.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: May 28, 2013
    Assignee: Stanley Black & Decker, Inc.
    Inventor: Haydn Howells
  • Publication number: 20130091710
    Abstract: Cutting members for razors are provided that have a blade portion and a base portion, the blade portion having a cutting edge region terminated at a free end thereof and an opposing non-cutting edge region, the blade portion being bent relative to the base portion in a bent portion spaced from the cutting edge region and adjacent to the non-cutting edge region, wherein the bent portion extends about 108 degrees to about 115 degrees from the base portion, the bent portion having a radius of about 0.30 mm to about 0.45 mm, at least part of the cutting member having a hardness of about hardness of about 540 HV to about 750 HV, and a thickness of the bent portion is less than the average thickness of the cutting member.
    Type: Application
    Filed: December 10, 2012
    Publication date: April 18, 2013
    Applicant: THE GILLETTE COMPANY
    Inventor: THE GILLETTE COMPANY
  • Patent number: 8347512
    Abstract: Cutting members for razors are provided that have been subjected to a localized heat-treating process, e.g., application of laser energy. In some cases, the cutting members include a bent portion, and the localized heat-treating process is used to enhance ductility and thereby facilitate formation of the bent portion.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: January 8, 2013
    Assignee: The Gillette Company
    Inventors: William Masek, Robert Smith, John L. Maziarz, Joseph A. DePuydt, Ming Laura Xu, Craig Stephen Vickery
  • Publication number: 20120311865
    Abstract: Disclosed is a razor blade having a mineral blade with a mineral cutting edge, with the mineral cutting edge having a radius of less than about 20 nanometers and an angle of about 40-50 degrees and wherein the mineral blade is coated in an adhesion promoter and an outer layer and a method of making the razor blade. Also disclosed is a razor having a mineral blade, and a method of making the razor.
    Type: Application
    Filed: June 8, 2012
    Publication date: December 13, 2012
    Applicant: ZAFIRRO, LLC
    Inventors: HAYDEN HAMILTON, RYAN McCARTHY, SIRI M. KHALSA, JACLYN KAMPMEIER, JONATHAN MORRIS, CARL ALVIANI, GRAEME WAGONER-LYNCH, JAMES KELLERMAN
  • Patent number: 8322253
    Abstract: A method of manufacturing a blade including heating and quenching a coil of strip steel material to harden the material, heating the strip steel material to temper the material, grinding a first angle along an edge of the material, and subsequent to the grinding, re-hardening, for example by induction heating, the edge of the material.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: December 4, 2012
    Assignee: Stanley Black & Decker, Inc.
    Inventor: Hadyn Howells
  • Publication number: 20120204429
    Abstract: A method of forming a lubricating coating on a razor blade that includes: providing a razor blade having a body and a cutting edge tapering from the body; providing a tank of a colloidal dispersion of a polymer having less than 2% in weight of polymer particles; providing a spray gun in fluid communication with the tank, the gun having an end directed to a blade-spraying region; placing the razor blade at a predetermined temperature (T) in the blade-spraying region; flowing the colloidal dispersion from the tank to the end of the spray gun, and in a direction to the razor blade; controlling a first gas stream to nebulise the colloidal dispersion into a mist in a dispersion region located between the end of the spray gun and the razor blade; independently controlling a second gas stream to control the mist properties; transporting the mist from the dispersion region to the razor blade placed in the blade-spraying region, the razor blade being at the predetermined temperature (T) so that water evaporates from t
    Type: Application
    Filed: October 22, 2009
    Publication date: August 16, 2012
    Applicant: BIC Violex SA
    Inventors: Giorgos Vlachos, Vassilis Papachristos, Michalis Karoussis
  • Publication number: 20120192432
    Abstract: A shaving implement, the form of which is a system of interlinked circular razors having the appearance of a metallic cloth, held together by fabric or metal thread. The flexible shaver is meant to replace razors of the wet shave type, providing greater safety in shaving the skin, and in cleanliness of the shaver itself The cutting areas of the circular razors are each slightly larger than an average hair, greatly reducing the chance of cutting oneself The shaver conforms to the contours of the skin, and increases the efficiency of shaving compared to current depilatory shavers.
    Type: Application
    Filed: February 1, 2011
    Publication date: August 2, 2012
    Inventor: Wallace Zane
  • Patent number: 8209867
    Abstract: A shaving cartridge has a housing with at least one blade having a blade edge. The housing has a first guard in front of the blade with a plurality of projections defining a plurality of open slots extending generally transverse to the blade edge. The open slots have a width of about 0.20 mm to about 0.49 mm and a pitch of about 0.40 mm to about 0.85 mm for allowing the free passage of hair during shaving.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: July 3, 2012
    Assignee: The Gillette Company
    Inventor: Sean Peter Clarke
  • Patent number: 8061237
    Abstract: A method of manufacturing razor blades from a strip material includes reducing the thickness of a lengthwise-extending blade edge region of the strip material.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: November 22, 2011
    Assignee: The Gillette Company
    Inventors: Stephen F. Hobbs, Cheng-Jih Li, Nicolae Neamtu
  • Publication number: 20110219625
    Abstract: The present invention relates to a shaver head for a rotary razor comprising a central axle and at least two spaced apart hubs extending from the axle. Each hub mounts a plurality of elongate blades such that the blades are mounted in a manner to each extend, in their elongate direction, parallel to each other and parallel to the central axle.
    Type: Application
    Filed: November 12, 2009
    Publication date: September 15, 2011
    Applicant: CLOSE CUT CO LIMITED
    Inventor: Richard Wayne Bryan
  • Patent number: 8011104
    Abstract: Cutting members for razors are provided that have been subjected to a localized heat-treating process, e.g., application of laser energy. In some cases, the cutting members include a bent portion, and the localized heat-treating process is used to enhance ductility and thereby facilitate formation of the bent portion.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: September 6, 2011
    Assignee: The Gillette Company
    Inventors: William Masek, Robert Smith, John L. Maziarz, Joseph A. DePuydt, Ming Laura Xu, Craig Stephen Vickery
  • Publication number: 20110131811
    Abstract: A multi-purpose hair cutter according to the present invention includes a body member, a blade member, and a projection member. The blade member is attached to a first side of the body member in a height direction. The projection member has a base part and at least one projecting part. The base part is attached to a second side of the body member opposite to the blade member in the height direction. The projecting part is formed to project from the base part and rises in a direction opposite to the blade member.
    Type: Application
    Filed: November 9, 2010
    Publication date: June 9, 2011
    Applicant: TOKYO RIKI CO., LTD.
    Inventor: Toru HIRANO
  • Patent number: 7918027
    Abstract: The present invention relates to razor heads and further to razors which include razor heads as defined. In one aspect of the invention the razor heads comprise at least one blade defining a plurality of cutting edges. The cutting edges are arranged to intercept at at least one point at which at least one angle of less than ninety degrees (90°) is formed between the cutting edges. This arrangement enables the cutting edges to impart cutting, sliding and rotary action onto hair being shaved.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: April 5, 2011
    Inventor: James Richard Colthurst
  • Patent number: 7897266
    Abstract: The present disclosure is generally directed to a personal grooming product or device (e.g., foil shaver, rotary shaver, etc.) having a metal coating on one or more surfaces thereof, the grooming product being designed for contacting the skin (e.g., the human hand or face, or the skin of an animal, such as during the act of pet grooming). More specifically, the present disclosure is directed to a personal grooming product or device having a layer of some measurable thickness on such a surface, wherein the layer comprises or contains a tarnish resistant, hypoallergenic and/or antimicrobial silver-containing alloy.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: March 1, 2011
    Assignee: Rovcal, Inc.
    Inventors: David W. Everett, Jr., Maciej Murzynski, Timothy John Martin, Giovanni Gonzalez
  • Patent number: 7882640
    Abstract: Razors are described herein. In some instances the razors include a safety razor blade unit comprising a guard, a cap, and at least two blades with parallel sharpened edges located between the guard and cap. A first blade defines a blade edge nearer the guard and a second blade defines a blade edge nearer the cap. The first blade has a cutter force greater than the cutter force of the second blade. In some instances the razors provide a comfortable shave having improved closeness.
    Type: Grant
    Filed: March 29, 2006
    Date of Patent: February 8, 2011
    Assignee: The Gillette Company
    Inventors: Andrew Zhuk, Weili Yu, Hoang Mai Trankiem, Neville Sonnenberg, Kevin Leslie Powell, Yiqian Eric Liu, Robert L. Lescanec, Steve S. Hahn, Joseph Allan DePuydt, Cinzia Simonis de Cloke, Alan Crook
  • Publication number: 20100083510
    Abstract: A shaving cartridge has a housing with at least one blade having a blade edge. The housing has a first guard in front of the blade with a plurality of projections defining a plurality of open slots extending generally transverse to the blade edge. The open slots have a width of about 0.20 mm to about 0.49 mm and a pitch of about 0.40 mm to about 0.85 mm for allowing the free passage of hair during shaving.
    Type: Application
    Filed: August 17, 2009
    Publication date: April 8, 2010
    Inventor: Sean Peter Clarke
  • Publication number: 20100011584
    Abstract: A shaving blade unit having a housing that includes a primary cap, a primary guard, an upper face, and a rear face. The shaving blade unit also includes a first primary blade located between the primary cap and the primary guard and extending at said the upper face, a first spacer stacked with the first primary blade, and a trimming blade extending at the rear face of the housing where the trimming blade is unreleasably fixed to the first spacer.
    Type: Application
    Filed: August 25, 2006
    Publication date: January 21, 2010
    Applicant: BIC-Violex SA
    Inventors: Dimitris Efthimiadis, Spiros Gratsias, Ioannis Bozikis
  • Publication number: 20090113726
    Abstract: The invention relates to a method for forming a thin, high hardness coating and devices comprising it. The method of the invention consists in depositing, by magnetron cathode sputtering, a titanium film on at least one surface of a substrate under a partial pressure of argon of 1 Pa, then in depositing, by magnetron cathode sputtering, a titanium nitride film, onto the film obtained by introducing nitrogen into the cathodic sputtering chamber while maintaining a partial pressure of 1 Pa, and in depositing a film of a composite nanostructured material based on titanium, zirconium, boron and nitrogen onto the film obtained by magnetron cathode sputtering in active co-sputtering mode. The method of the invention can be applied in many fields, and in particular in the mechanical field in order to improve the surface hardness of mechanical components.
    Type: Application
    Filed: September 25, 2008
    Publication date: May 7, 2009
    Inventors: Cedric DUCROS, Frederic SANCHETTE, Vincent SANZONE
  • Publication number: 20080276459
    Abstract: Shaving apparatus having at least one cutting unit (3) with an external cutting member (4) and a rotatable internal cutting member (6) each having cooperating cutting edges (8,9) forming bearing surfaces of a first bearing, said external and internal cutting member (4,6) having a second bearing with bearing surfaces (14,17). To minimize the friction between the cutting edges (8,9), means (13) with visco-elastic properties are provided between the two bearings, so that during operation the distance between the bearing surfaces (8,9) of the first bearing adjusts oneself to the distance between the bearing surfaces (14,17) of the second bearing. During cutting of hairs the means with visco-elastic properties behave as a stiff element whereas during periods in which no hairs are cut these means behave relatively soft so that the cutting gaps between the cutting edges are closed.
    Type: Application
    Filed: June 10, 2005
    Publication date: November 13, 2008
    Inventors: Bastiaan Johannes De Wit, Fokke Roelof Voorhorst, Geert Veenstra, Leonardus Hendrikus Gerardus Johannes Segeren, Sieds Bosch, Sjoerd Haites
  • Patent number: 7191523
    Abstract: A safety razor with a plurality of blades comprising a head provided with a plurality of vertically adjacent blades, which do not wholly overlap one another, and blade support parts supporting the respective blades apart from one another in order to retain the respective blades at spaces, and wherein non-overlapping portions, which do not overlap one another, are formed on supported portions of the respective blades and the blade support parts are held to the non-overlapping portions of the blades to support the blades. A support structure can be divided into two members to be manufactured and mechanically assembled, metal molds are not so much complicated, and mechanical assembly of blades is made possible to prevent degradation in yield.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: March 20, 2007
    Assignee: Kai R&D Center Co., Ltd
    Inventors: Hiroaki Miyazaki, Hiroyuki Nakasuka
  • Patent number: 7111401
    Abstract: A detachable razor cartridge has blade seat and at least one blade having a rectilinear cutting edge. An in-line row of integral guard elements project in cantilever position from the blade seat and extend in spaced relation to and beyond the cutting edge of the blade so that the cutting edge of the blade is unobstructed along its entire cutting length. Enlargements at the free ends of the guard elements disposed forward of and in spaced relation to the blade cutting edge may be provided in a variety of configurations and arrangements for smooth skin engagement to control skin flow and limit the degree of blade cutting edge exposure to skin being shaved.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: September 26, 2006
    Assignee: Eveready Battery Company, Inc.
    Inventor: Paul D. Richard
  • Patent number: 7047646
    Abstract: A razor cartridge is provided that includes a frame, at least four razor blades, a guard that includes a contact surface, and a cap that includes a contact surface. The razor blades are supported by the frame. The guard is disposed forward of the razor blades and the cap is disposed aft of the razor blades. The razor blades are arranged so that the cutting edge of each razor blade is adjacent a plane that tangentially intersects the contact surfaces of the guard and the cap. As a result, each stroke of the razor exposes the surface being shaved to at least four razor blade cutting edges in succession. A unitary razor assembly that includes a head characterized in the same manner as the above-described cartridge is also provided.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: May 23, 2006
    Assignee: Eveready Battery Company, Inc.
    Inventor: David C. Coffin
  • Patent number: 7007393
    Abstract: In a microreplicated shaving element the substrate includes a plurality of microshaving elements projecting outwardly from a surface defined by the substrate. Each microshaving element defines a cutting edge spaced away from the surface and a plurality of guard elements are attached to and also extend outwardly from the substrate. Each guard element is preferably positioned adjacent to at least one of the microshaving elements and includes a non-planar distal end for engaging a user skin during a shaving operation.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: March 7, 2006
    Assignee: Eveready Battery Company, Inc.
    Inventor: Raymond Guimont
  • Patent number: 6962000
    Abstract: The invention relates to a cutting member (7) includes a plate-shaped substrate (19) on which a tip (27) is provided which is bounded by a cutting edge (9). According to the invention, the tip includes an ultimate tip (31) and a basic tip (33), the ultimate tip extending from the cutting edge over a distance d1 and having a profile which at least approximates the equation w=a1.dn1, and the basic tip connecting to the ultimate tip and having a profile which at least approximates the equation w=a.(d+R)n, where w is a profile thickness (in ?m) and d is a distance (in ?m) from the cutting edge (9), and n1 is smaller than n, and a1=a.(d1+R)n/d1n1. In this manner, the profile of the ultimate tip is relatively robust and the profile of the basic tip is relatively slender, as a result of which the cutting member has a comparatively high resistance to wear, and the cutting forces of the cutting member are comparatively small. In one example, n1=n.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: November 8, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Dirk Herbert Johan Teeuw, Ype Bernardus Brada
  • Publication number: 20040221460
    Abstract: An elongated stock material for use in manufacturing shaving razor blades, the material including an elongated, flat strip of metal having a front edge and back edge extending along its length, a sharpened cutting edge portion extending along the front edge, a weakened portion between the front edge and the back edge, a blade portion between the cutting edge portion and the weakened portion, and a removable portion between the weakened portion and the back edge. Also disclosed are blades and cartridges made from the material, and methods and apparatus making and using the material.
    Type: Application
    Filed: October 7, 2003
    Publication date: November 11, 2004
    Applicant: The Gillette Company, a Delaware corporation
    Inventors: Nicolae Neamtu, Stephen F. Hobbs
  • Publication number: 20040200074
    Abstract: A safety razor unit including a guard, a cap, and a group of first, second, and third blades with parallel sharpened edges located between the guard and cap, the first blade defining a blade edge nearest the guard having a negative exposure not less than −0.2 mm, and the third blade defines a blade edge nearest the cap having a positive exposure not greater than +0.2 mm.
    Type: Application
    Filed: April 27, 2004
    Publication date: October 14, 2004
    Applicant: The Gillette Company, a Delaware corporation
    Inventors: Bernard Gilder, John Charles Terry
  • Publication number: 20040177511
    Abstract: A safety razor with a plurality of blades comprising a head provided with a plurality of vertically adjacent blades, which do not wholly overlap one another, and blade support parts supporting the respective blades apart from one another in order to retain the respective blades at spaces, and wherein non-overlapping portions, which do not overlap one another, are formed on supported portions of the respective blades and the blade support parts are held to the non-overlapping portions of the blades to support the blades. A support structure can be divided into two members to be manufactured and mechanically assembled, metal molds are not so much complicated, and mechanical assembly of blades is made possible to prevent degradation in yield.
    Type: Application
    Filed: January 13, 2004
    Publication date: September 16, 2004
    Inventors: Hiroaki Miyazaki, Hiroyuki Nakasuka
  • Publication number: 20040168322
    Abstract: A detachable razor cartridge has blade seat and at least one blade having a rectilinear cutting edge. An in-line row of integral guard elements project in cantilever position from the blade seat and extend in spaced relation to and beyond the cutting edge of the blade so that the cutting edge of the blade is unobstructed along its entire cutting length. Enlargements at the free ends of the guard elements disposed forward of and in spaced relation to the blade cutting edge may be provided in a variety of configurations and arrangements for smooth skin engagement to control skin flow and limit the degree of blade cutting edge exposure to skin being shaved.
    Type: Application
    Filed: February 2, 2004
    Publication date: September 2, 2004
    Applicant: Eveready Battery Company, Inc.
    Inventor: Paul D. Richard
  • Patent number: 6655030
    Abstract: The invention relates to a shaving head (1) having at least two cutting members, the cutting edge (7)of at least one of the cutting members (5) being situated at a side, remote from the other cutting member (9), of an imaginary center plane (41) of the carrier (31) of the relevant cutting member, and having a tip angle (&agr;1)enclosed by a main side face (37) and a facet surface (43) of the carrier (31). In this manner, the cutting edge of the relevant cutting member has a tip angle (&agr;1) which is asymmetrical relative to the center plane of the carrier. As a result, a space (57), which is present between the carriers (31, 33) of the two cutting members, is divergent, viewed from the skin contact surface (29), and the risk of said space becoming clogged by cut hairs and shaving foam is considerably reduced.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: December 2, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Jasper Zuidervaart
  • Publication number: 20030213129
    Abstract: In a microprismatic shaving element for abrasively removing hair, a substrate defines a plurality contiguous raised portions projecting outwardly therefrom. Each of the raised portions defines at least one hair engaging surface and is located on the substrate in an array that defines an abrasive surface. During a shaving operation as the abrasive surface is drawn over the skin of the user, each of the raised portions successively abrades hair extending from extending from said user's skin leaving the ends of the hair frayed after completion of the shaving operation thereby achieving the feel of a smooth shave.
    Type: Application
    Filed: February 26, 2003
    Publication date: November 20, 2003
    Applicant: Warner-Lambert Company LLC
    Inventors: Randy Nicolosi, Glennis Orloff, Brian Balistee, Raymond Guimont
  • Publication number: 20030204954
    Abstract: A safety razor blade unit (2) has blade assembly (5) comprising a plurality of parallel blades (16) mounted on a razor handle (1) by a flexible support structure (4). Each blade (16) consists of an elongate blade element having a forward edge section (50) with a sharp cutting edge (17), and a planar blade section (54) extending rearwardly from the forward edge section (50). The forward edge section is upwardly inclined by bending a blade element blank between press tooling so that in the transition region between the forward edge section (50), which extends back from the tip of the cutting edge (17) by not more than 1 mm, and the planar blade section (54), the lower surface is convex and the upper surface is concave, with the plane (Pt) bisecting the tip being at an angle of 10° to 35° to the mid plane (Pm) of the planar section (54).
    Type: Application
    Filed: February 28, 2003
    Publication date: November 6, 2003
    Applicant: THE GILLETTE COMPANY
    Inventor: Kevin J. Wain
  • Patent number: 6276061
    Abstract: A multi-blade shaving apparatus includes a handle holding a head body in which are located the shaving blades, advantageously three, extending parallel to each other. Furthermore, at least an additional blade (trim blade) is located at a suitable angle, preferably 60-120°, to the shaving blades. The shaving blades and the trim blade are preferably identical. Advantageously the apparatus is provided with a rotating device enabling different blades to be in contact with the skin.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: August 21, 2001
    Inventor: Menachem Rozenkranc
  • Patent number: 6216349
    Abstract: A safety razor blade unit including a guard, a cap, and a group of first, second, and third blades with parallel sharpened edges located between the guard and cap, the blades being resiliently movably mounted and having an at rest condition in which the first blade defines a blade edge nearest the guard having a negative exposure between about −0.04 mm and about −0.06 mm, the third blade defines a blade edge nearest the cap having a positive exposure between about +0.04 mm and about +0.06 mm, and the second blade defines a blade edge having an exposure of about zero.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: April 17, 2001
    Assignee: The Gillette Company
    Inventors: Bernard Gilder, John Charles Terry