US3071856A - Razor blade and method of making same - Google Patents
Razor blade and method of making same Download PDFInfo
- Publication number
- US3071856A US3071856A US863109A US86310959A US3071856A US 3071856 A US3071856 A US 3071856A US 863109 A US863109 A US 863109A US 86310959 A US86310959 A US 86310959A US 3071856 A US3071856 A US 3071856A
- Authority
- US
- United States
- Prior art keywords
- blade
- cutting edge
- fluorocarbon
- razor blade
- coating
- 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
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
- B26B21/54—Razor-blades
- B26B21/58—Razor-blades characterised by the material
- B26B21/60—Razor-blades characterised by the material by the coating material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/60—Deposition of organic layers from vapour phase
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S128/00—Surgery
- Y10S128/14—Polytetrafluoroethylene, i.e. PTFE
Definitions
- Conventional steel safety razor blades to which the. present invention may be appliedto produce improved blades are from 0.003 to 0.015 inch-thick and havewedgeshaped cutting edges, the included-solid angle of which is greater than 14 and less than 35;
- the faces or sides of some such cutting edges extend back from the edge for a distance upto as muchv astOJl inch or even more.
- Each face need notlbe .asingle planaruninterrupted continuous blade edgeuis composed may be either carbon steel or hardenable stainless steel. In either case it is hardened by asuitable'heat treatingprocess.
- the fluorocarbon integument or coating may extend over the entire wedge faces back from the ultimate edge or even farther, or it. may cover only the portion of the final facet immediately adjacent to the ultimate edge.
- the precise thickness of the integument does not appear to be critical, athin continuous adherent coating having a thickness of the order of an oriented monolayer of molecules having been found effective for the purpose of the present invention.
- the thickness of the integument need not be uniform throughout its extent.
- the fluorocarbon materials which may be used in practicing the present invention are solid materials and include a variety ofysolidv polymers of tetraliuoroethylene containing a chain at carbon atoms including. a. plurality of (-C'F -CF groups. These polymers may vary widely in molecularweight in the form in which they are used for applying to the cutting. edge, ranging from a. molecular weight of the order of 2000 or even lower to a molecular weight above 2,000,000.
- the terminal groups at the ends'of the carbon chains may also vary, depending, as is well known, upon the method of making the polymer. Polymers made in aqueous media are reported to have terminal carboxyl groups, while others may have hydrogen and/or chlorine atoms attached to the terminal carbon atoms .of the chain.
- the material may be applied to the blade cutting edge by placing the edgev in close proximity toa supply of the fluorocarbon while the latter is heated, to deposit a fluorocarbon coating on the cutting edge.
- Electrophoresis may also be employed to deposit the material from charged liquid dispersions thereof, or the cutting edge may be sprayed with or simply dipped in the dispersion and allowed to dry.
- Solid fluorocarbons having a molecular weight in the lower part of the above range may also be applied to the cutting edge by dipping the edge in a dispersion of the important as in thecaseof. conventional blades.
- particulate fluorocarbon in a volatile liquid medium or by spraying or brushing such a dispersion onto the edge, then evaporating the liquid medium.
- volatile liquid media which may be used are water, and such .Freons as dichlorodifiuoromethane, dichlorotetrafluoroethane, .trichlorotrifluoroethane, and mixtures thereof.
- the blade carrying the deposited solid fluorocarbon be baked at an elevated temperature of the orderiiof 200: to 750 F. for a period of time suflicient .for the fluorocarbon to become firmly adhered to the substrate.
- the time may vary'from lessthan two minutes up to 48 hours or more depending on the particular fluorocarbon employed, the nature of the substrate, the rapidity with which the coated blade is brought up to temperature, and the temperature achieved.
- the blade cannot be heated to temperatures higher than about 400 F. for more than five minutes without some tempering or softening of the blade.
- some softening or tempering of the blades can be tolerated since its disadvantages are more than offset by the improvement'in shavingeifectiveness brought about by the present invention.
- steel blades when heated to 300 to 320 F. must be baked for at least thirty minutes toachieve optimum results, although longer heating does noharm -to the coating.
- the integument on the cutting edge of the blade when the blade is ready for use may be extremely thin, as pointed out above, it is desirable, in order to produce such an integument, that the coating be substantially thicker at the time the baking step begins. Any excess material remaining on the cutting edge which does not bond to the substrate during the baking step is in the form of a loose film which can be readily removed by brushing or rubbing. It is not essential that this excess material be removed before the blade is used.
- the mag sten coil was heated electrically until the crucible temperature reached 700-750 F.
- the current was then controlled so that a pressure of 3 10 mm. of mercury was maintained during the heating which was continued for four hours.
- the blade was removed and showed a deposited layer on its cutting edge which exhibited interference colors in the light microscope.
- the blade was then placed in an air oven at 320 F. for 40 minutes.
- Example 2 A hardened stainless steel razor blade purchased on the open market was thoroughly cleaned by washing with trichloroethylene and dried; then its cutting edge was dipped into an aqueous colloidal dispersion containing 25% by weight of finely divided solid tetrafluoroethylene polymer (Du Ponts Teflon Clear Finish). Upon removal from the dispersion, the cutting edge of the blade carried with it a coating of the aqueous dispersion which was then dried for one hour at 120 F. in the atmosphere, after which the deposited coating was baked at 750 F. for 7 minutes.
- aqueous colloidal dispersion containing 25% by weight of finely divided solid tetrafluoroethylene polymer (Du Ponts Teflon Clear Finish).
- Example 3 A finely divided solid fluorocarbon polymer containing a chain of carbon atoms including a plurality of (-CF --CF groups and also containing a minor proportion (about 1% by weight) of chlorine atoms and a similar proportion of hydrogen atoms with a melting range of 265293 C. (Du Ponts Fluorowax TLT-17 Lot No. 2) was dispersed in a 40:60 mixture by weight of Freon l2 (dichlorodifluoromethane) and Freon ll4 (dichlorotetrafluoroethane) to from a dispersion containing 1% by weight of solids. This dispersion was sprayed from a pressure container onto the cutting edge of a Gillette razor blade, cleaned as described in the preceding examples; and the blade was baked at 330 F. in an air oven for 7 hours.
- Freon l2 diichlorodifluoromethane
- Freon ll4 diichlorotetrafluoroethane
- Example 4 The fluorocarbon solid described in Example 3 was dispersed in Freon 113 (trichlorotrifluoroethane) to form a dispersion containing 1% by weight of solids. The cutting edge of a Gillette razor blade, cleaned as described above, was dipped into this dispersion and allowed to dry in the atmosphere. The blade was then baked at 320 F. for 16 hours. Similar results were also obtained using similar dispersions containing up to 11% by weight of fluorocarbon polymer.
- Freon 113 trichlorotrifluoroethane
- Example 5 The fluorocarbon solid described in Example 3 was deposited onto a Gillette razor blade edge as described in Example 1 except that the temperature of the crucible was maintained at 335 F. and the heating continued for 10 minutes. The blades were removed from the vacuum chamber and showed interference colors on the cutting edge. Similar results can be obtained by heating at a temperature as low as 250 F. for a longer time. The blades were placed in an air oven at 320 F. for 15 minutes. Similar results were also obtained using times up to 16 hours at the same temperature.
- Example 6 The fluorocarbon solid described in Example 1 was heated in air at atmospheric pressure in a silica crucible to a temperature of 450 C. until a thick white smoke continuously emanated from the crucible.
- a Gillette razor blade cleaned as described above was held with its edge in the white smoke at a distance of three inches from the crucible for 10 minutes. By reason of its proximity to the crucible, the blade attained a temperature of the order of 300 F. during the deposition of the fluorocarbon on its cutting edge and required no further baking.
- a safety razor blade having on its cutting edge an adherent coating comprising a solid fluorocarbon polymer.
- a safety razor blade having on its cutting edge an adherent coating comprising a solid polymer of tetrafluoroethylene.
- a steel safety razor blade having on its cutting edge an adherent coating comprising a solid polymer of tetrafluoroethylene.
- a safety razor blade having on its cutting edge an adherent coating compirsing a solid polymer containing a chain of carbon atoms including a plurality of (--CF CF groups.
- a safety razor blade as claimed in claim 5 in which heating said deposited polymer to form a coating adherent to said edge.
- the method of treating a steel safety razor blade which comprises depositing on its cutting edge a composition comprising a solid polymer containing a chain of carbon atoms including a plurality of (CF -CF groups and also including terminal groups selected from the class consisting of carboxyl groups, hydrogen atoms and chlorine atoms, and heating said deposited polymer to form a coating adherent to said edge.
- the method of treating a steel safety razor blade which comprises depositing on its cutting edge a dispersion in a volatile liquid containing discrete particles of solid polymer containing a chain of carbon atoms including a plurality of (CF CF groups, evaporating said volatile liquid, and heating the resulting deposit at an elevated temperature to form a coating adherent to said edge.
- the method of treating a steel safety razor blade which comprises heating a solid polymer containing a chain of carbon atoms including a plurality of groups to a temperature sufiicient to vaporize a portion thereof, maintaining a cutting edge of said blade in said vapors to deposit a coating thereon, and heating the resulting deposit to form a coating adherent to said edge.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Knives (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
- Dry Shavers And Clippers (AREA)
- Paints Or Removers (AREA)
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE598698D BE598698A (zh) | 1959-12-31 | ||
NL123398D NL123398C (zh) | 1959-12-31 | ||
LU39590D LU39590A1 (zh) | 1959-12-31 | ||
NL259570D NL259570A (zh) | 1959-12-31 | ||
US863109A US3071856A (en) | 1959-12-31 | 1959-12-31 | Razor blade and method of making same |
GB44051/60A GB906005A (en) | 1959-12-31 | 1960-12-22 | Razor blade and method of making same |
FR848021A FR1299519A (fr) | 1959-12-31 | 1960-12-27 | Lame de rasoir et procédé pour la fabriquer |
DEG31256A DE1147141B (de) | 1959-12-31 | 1960-12-28 | Sicherheitsrasierklinge und Verfahren zu ihrer Herstellung |
DO1960000898A DOP1960000898A (es) | 1959-12-31 | 1960-12-29 | Metodo para hace hojas de rasurar. |
CH1458860A CH402655A (de) | 1959-12-31 | 1960-12-30 | Rasierklinge und Verfahren zu deren Herstellung |
DK518260AA DK110230C (da) | 1959-12-31 | 1960-12-30 | Barberblad med et vedhængende overtræk på skæreæggen og fremgangsmåde ved fremstilling heraf. |
SE1267860A SE191482C1 (sv) | 1959-12-31 | 1960-12-30 | Rakblad jämte förfarande för dess framställning |
OA50220A OA00177A (fr) | 1959-12-31 | 1964-07-29 | Lame de rasoir et procédé pour la fabrication. |
CY20064A CY300A (en) | 1959-12-31 | 1964-11-07 | Razor blade and method of making same |
MY29/65A MY6500029A (en) | 1959-12-31 | 1965-12-30 | Razor blade and method of making same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US863109A US3071856A (en) | 1959-12-31 | 1959-12-31 | Razor blade and method of making same |
Publications (1)
Publication Number | Publication Date |
---|---|
US3071856A true US3071856A (en) | 1963-01-08 |
Family
ID=25340276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US863109A Expired - Lifetime US3071856A (en) | 1959-12-31 | 1959-12-31 | Razor blade and method of making same |
Country Status (14)
Country | Link |
---|---|
US (1) | US3071856A (zh) |
BE (1) | BE598698A (zh) |
CH (1) | CH402655A (zh) |
CY (1) | CY300A (zh) |
DE (1) | DE1147141B (zh) |
DK (1) | DK110230C (zh) |
DO (1) | DOP1960000898A (zh) |
FR (1) | FR1299519A (zh) |
GB (1) | GB906005A (zh) |
LU (1) | LU39590A1 (zh) |
MY (1) | MY6500029A (zh) |
NL (2) | NL123398C (zh) |
OA (1) | OA00177A (zh) |
SE (1) | SE191482C1 (zh) |
Cited By (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3224094A (en) * | 1962-10-04 | 1965-12-21 | Philip Morris Inc | Polyethylene coated blades and process for their production |
US3345202A (en) * | 1963-06-10 | 1967-10-03 | Eversharp Inc | Method of making razor blades |
US3372218A (en) * | 1964-09-30 | 1968-03-05 | Du Pont | Melt-spinning polyester filaments |
US3402468A (en) * | 1963-06-10 | 1968-09-24 | Eversharp Inc | Polytetrafluoroethylene coated razor blade |
US3415206A (en) * | 1965-03-31 | 1968-12-10 | Reisman Howard | Pretzel forming |
US3480483A (en) * | 1965-05-06 | 1969-11-25 | Wilkinson Sword Ltd | Razor blades and methods of manufacture thereof |
US3501334A (en) * | 1966-03-16 | 1970-03-17 | Gillette Co | Razor blades |
US3508957A (en) * | 1964-10-23 | 1970-04-28 | Tondeo Werk Adolf Noss Fa | Coated razor blades |
US3518110A (en) * | 1964-07-23 | 1970-06-30 | Gillette Co | Razor blade and method of making same |
US3635811A (en) * | 1967-11-06 | 1972-01-18 | Warner Lambert Co | Method of applying a coating |
US3638308A (en) * | 1968-02-01 | 1972-02-01 | Gillette Co | Razor blades |
US3652342A (en) * | 1967-06-07 | 1972-03-28 | Gillette Co | Razor blades and processes for the preparation thereof |
US4314559A (en) * | 1979-12-12 | 1982-02-09 | Corning Glass Works | Nonstick conductive coating |
US4333467A (en) * | 1979-12-12 | 1982-06-08 | Corning Glass Works | Nonstick conductive coating |
DE3811163A1 (de) * | 1987-03-31 | 1988-10-13 | Central Glass Co Ltd | Verfahren zur herstellung eines ueberzugsfilms aus fluorharz durch physikalische dampfabscheidung |
US4972968A (en) * | 1989-07-25 | 1990-11-27 | American Safety Razor Company | Two-piece dispenser for double-edge razor blades |
AU613179B2 (en) * | 1989-04-03 | 1991-07-25 | Shin-Etsu Chemical Co. Ltd. | Edged medical tool and method for preparation thereof |
WO1993008926A1 (en) * | 1991-10-28 | 1993-05-13 | The Gillette Company | Coating cutting edges with fluorocarbon polymers |
WO1993020952A1 (en) * | 1992-04-17 | 1993-10-28 | The Gillette Company | Method of treating razor blade cutting edges |
EP0573600A1 (en) * | 1991-03-01 | 1993-12-15 | Gillette Co | Razor blades. |
WO1994027744A1 (en) * | 1993-05-28 | 1994-12-08 | The Gillette Company | Method of coating cutting edges |
EP0854018A1 (en) | 1997-01-17 | 1998-07-22 | Warner-Lambert Company | Reduced friction razor head |
US5980637A (en) * | 1996-12-20 | 1999-11-09 | Steag Rtp Systems, Inc. | System for depositing a material on a substrate using light energy |
US5985459A (en) * | 1996-10-31 | 1999-11-16 | The Gillette Company | Method of treating razor blade cutting edges |
US6174651B1 (en) | 1999-01-14 | 2001-01-16 | Steag Rtp Systems, Inc. | Method for depositing atomized materials onto a substrate utilizing light exposure for heating |
US6228428B1 (en) | 1991-10-28 | 2001-05-08 | The Gillette Company | Coating cutting edges with fluorocarbon polymers |
US6488027B1 (en) | 1998-03-10 | 2002-12-03 | Novartis Ag | Powder inhaler |
US20080244908A1 (en) * | 2007-04-04 | 2008-10-09 | Robert Petcavich | Cutting tool |
WO2010081119A1 (en) | 2009-01-12 | 2010-07-15 | The Gillette Company | Formation of thin uniform coatings on blade edges using isostatic press |
WO2010081118A1 (en) | 2009-01-12 | 2010-07-15 | The Gillette Company | Formation of thin uniform coatings on blade edges using isostatic press |
WO2016004142A1 (en) | 2014-07-01 | 2016-01-07 | The Gillette Company | Method of treating razor blade cutting edges |
WO2018148177A1 (en) | 2017-02-13 | 2018-08-16 | The Gillette Company Llc | Razor blades |
WO2018148175A1 (en) | 2017-02-13 | 2018-08-16 | The Gillette Company Llc | Razor blades |
WO2018148176A1 (en) | 2017-02-13 | 2018-08-16 | The Gillette Company Llc | Method of treating razor blades |
WO2020227707A1 (en) | 2019-05-09 | 2020-11-12 | The Gillette Company Llc | Methods and apparatuses for modifying razor blade edges |
WO2022049058A1 (en) * | 2020-09-03 | 2022-03-10 | Bic Violex S.A. | Methods and systems for forming a blade of a shaving device |
US11613719B2 (en) | 2018-09-24 | 2023-03-28 | Becton, Dickinson And Company | Self-lubricating medical articles |
WO2023192888A1 (en) | 2022-03-31 | 2023-10-05 | The Gillette Company Llc | Blade edge tip measurement |
WO2024036236A1 (en) * | 2022-08-10 | 2024-02-15 | The Gillette Company Llc | Method of treating razor blade cutting edges |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU625072B2 (en) * | 1988-07-13 | 1992-07-02 | Warner-Lambert Company | Shaving razors |
US5645894A (en) * | 1996-01-17 | 1997-07-08 | The Gillette Company | Method of treating razor blade cutting edges |
US20070124944A1 (en) * | 2005-11-30 | 2007-06-07 | Eveready Battery Company, Inc. | Razor blade and method of making it |
KR101673499B1 (ko) | 2009-10-22 | 2016-11-07 | 빅-비올렉스 에스아 | 면도기 블레이드에 윤활 코팅을 형성하는 방법, 그러한 면도기 블레이드 및 면도기 블레이드 코팅 시스템 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2292417A (en) * | 1939-02-01 | 1942-08-11 | Richard F Grant | Razor blade |
US2662065A (en) * | 1951-05-10 | 1953-12-08 | Du Pont | Process for obtaining dispersions of polyfluorethylenes |
US2707157A (en) * | 1952-01-14 | 1955-04-26 | Dow Chemical Co | Asphalt-impregnated linoleum-type articles and method of making same |
US2814296A (en) * | 1954-04-15 | 1957-11-26 | S & R J Everett & Co Ltd | Surgical needles |
US2855669A (en) * | 1954-04-28 | 1958-10-14 | Nicolet Ind Inc | Coated cut-off saw for asbestos articles |
US2893900A (en) * | 1956-01-09 | 1959-07-07 | Eugene S Machlin | Process of condensing polytetrafluoroethylene vapors onto a substrate and sintering the condensate |
US2937976A (en) * | 1958-11-25 | 1960-05-24 | Gillette Co | Organosiloxane gel coated razor blade |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB565640A (en) * | 1943-05-15 | 1944-11-20 | John Ferdinand Kayser | Fine edged cutting implements and the manufacture thereof |
US2408790A (en) * | 1944-05-16 | 1946-10-08 | Edward L Mack | Razor blade and other cutting tools |
US2562162A (en) * | 1947-05-14 | 1951-07-31 | Gray Irene Carol | Razor blade conditioning |
GB690031A (en) * | 1949-08-23 | 1953-04-08 | Mini Of Supply | Coating surfaces with polytetrafluoroethylene |
US2703451A (en) * | 1950-03-04 | 1955-03-08 | Hensel Herman Struve | Cutting instrument having means for indicating usage |
US2699407A (en) * | 1952-08-26 | 1955-01-11 | Sherwin Williams Co | Resinous composition method of coating metals therewith to increase hightemperature resistance thereof and article produced thereby |
GB718941A (en) * | 1953-01-15 | 1954-11-24 | Jeyaretnam Thillaimuthu | Graphitization of razor blades and like implements |
GB765104A (en) * | 1954-04-15 | 1957-01-02 | S & R J Everett & Co Ltd | Improvements relating to surgical and like needles |
GB803479A (en) * | 1956-08-06 | 1958-10-29 | Midland Silicones Ltd | Vinylic type organosilicon compounds |
-
0
- NL NL259570D patent/NL259570A/xx unknown
- NL NL123398D patent/NL123398C/xx active
- LU LU39590D patent/LU39590A1/xx unknown
- BE BE598698D patent/BE598698A/xx unknown
-
1959
- 1959-12-31 US US863109A patent/US3071856A/en not_active Expired - Lifetime
-
1960
- 1960-12-22 GB GB44051/60A patent/GB906005A/en not_active Expired
- 1960-12-27 FR FR848021A patent/FR1299519A/fr not_active Expired
- 1960-12-28 DE DEG31256A patent/DE1147141B/de active Pending
- 1960-12-29 DO DO1960000898A patent/DOP1960000898A/es unknown
- 1960-12-30 CH CH1458860A patent/CH402655A/de unknown
- 1960-12-30 SE SE1267860A patent/SE191482C1/sv unknown
- 1960-12-30 DK DK518260AA patent/DK110230C/da active
-
1964
- 1964-07-29 OA OA50220A patent/OA00177A/xx unknown
- 1964-11-07 CY CY20064A patent/CY300A/xx unknown
-
1965
- 1965-12-30 MY MY29/65A patent/MY6500029A/xx unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2292417A (en) * | 1939-02-01 | 1942-08-11 | Richard F Grant | Razor blade |
US2662065A (en) * | 1951-05-10 | 1953-12-08 | Du Pont | Process for obtaining dispersions of polyfluorethylenes |
US2707157A (en) * | 1952-01-14 | 1955-04-26 | Dow Chemical Co | Asphalt-impregnated linoleum-type articles and method of making same |
US2814296A (en) * | 1954-04-15 | 1957-11-26 | S & R J Everett & Co Ltd | Surgical needles |
US2855669A (en) * | 1954-04-28 | 1958-10-14 | Nicolet Ind Inc | Coated cut-off saw for asbestos articles |
US2893900A (en) * | 1956-01-09 | 1959-07-07 | Eugene S Machlin | Process of condensing polytetrafluoroethylene vapors onto a substrate and sintering the condensate |
US2937976A (en) * | 1958-11-25 | 1960-05-24 | Gillette Co | Organosiloxane gel coated razor blade |
Cited By (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3224094A (en) * | 1962-10-04 | 1965-12-21 | Philip Morris Inc | Polyethylene coated blades and process for their production |
US3345202A (en) * | 1963-06-10 | 1967-10-03 | Eversharp Inc | Method of making razor blades |
US3402468A (en) * | 1963-06-10 | 1968-09-24 | Eversharp Inc | Polytetrafluoroethylene coated razor blade |
US3518110A (en) * | 1964-07-23 | 1970-06-30 | Gillette Co | Razor blade and method of making same |
US3372218A (en) * | 1964-09-30 | 1968-03-05 | Du Pont | Melt-spinning polyester filaments |
US3508957A (en) * | 1964-10-23 | 1970-04-28 | Tondeo Werk Adolf Noss Fa | Coated razor blades |
US3415206A (en) * | 1965-03-31 | 1968-12-10 | Reisman Howard | Pretzel forming |
US3480483A (en) * | 1965-05-06 | 1969-11-25 | Wilkinson Sword Ltd | Razor blades and methods of manufacture thereof |
US3501334A (en) * | 1966-03-16 | 1970-03-17 | Gillette Co | Razor blades |
US3652342A (en) * | 1967-06-07 | 1972-03-28 | Gillette Co | Razor blades and processes for the preparation thereof |
US3635811A (en) * | 1967-11-06 | 1972-01-18 | Warner Lambert Co | Method of applying a coating |
US3638308A (en) * | 1968-02-01 | 1972-02-01 | Gillette Co | Razor blades |
US4314559A (en) * | 1979-12-12 | 1982-02-09 | Corning Glass Works | Nonstick conductive coating |
US4333467A (en) * | 1979-12-12 | 1982-06-08 | Corning Glass Works | Nonstick conductive coating |
DE3811163A1 (de) * | 1987-03-31 | 1988-10-13 | Central Glass Co Ltd | Verfahren zur herstellung eines ueberzugsfilms aus fluorharz durch physikalische dampfabscheidung |
US4863762A (en) * | 1987-03-31 | 1989-09-05 | Central Glass Company, Limited | Method of forming coating film of fluororesin by physical vapor deposition |
AU613179B2 (en) * | 1989-04-03 | 1991-07-25 | Shin-Etsu Chemical Co. Ltd. | Edged medical tool and method for preparation thereof |
US4972968A (en) * | 1989-07-25 | 1990-11-27 | American Safety Razor Company | Two-piece dispenser for double-edge razor blades |
EP0573600A4 (zh) * | 1991-03-01 | 1994-02-02 | The Gillette Company | |
EP0573600A1 (en) * | 1991-03-01 | 1993-12-15 | Gillette Co | Razor blades. |
TR26812A (tr) * | 1991-03-01 | 1994-08-09 | Gillette Co | Bir flüorokarbon polimer ve polimerin eritilmesi icin silan karisiminin isitilmasiyla olusturulan sulp yapiskan bir kaplama tasiyan kesici kenar bölgelerine sahip tras bicaklari |
WO1993008926A1 (en) * | 1991-10-28 | 1993-05-13 | The Gillette Company | Coating cutting edges with fluorocarbon polymers |
US6228428B1 (en) | 1991-10-28 | 2001-05-08 | The Gillette Company | Coating cutting edges with fluorocarbon polymers |
TR27422A (tr) * | 1991-10-28 | 1995-04-21 | Gillette Co | Kesici kenarlarin flüorokarbon polimeri ile kaplanmasi. |
WO1993020952A1 (en) * | 1992-04-17 | 1993-10-28 | The Gillette Company | Method of treating razor blade cutting edges |
US5263256A (en) * | 1992-04-17 | 1993-11-23 | The Gillette Company | Method of treating razor blade cutting edges |
CN1051266C (zh) * | 1992-04-17 | 2000-04-12 | 吉莱特公司 | 在剃须刀刃上形成多氟烃涂层的方法 |
AU684519B2 (en) * | 1993-05-28 | 1997-12-18 | Gillette Company, The | Method of coating cutting edges |
US6110532A (en) * | 1993-05-28 | 2000-08-29 | The Gillette Company | Method of coating cutting edges |
CN1063987C (zh) * | 1993-05-28 | 2001-04-04 | 吉莱特公司 | 涂覆刀刃的方法 |
WO1994027744A1 (en) * | 1993-05-28 | 1994-12-08 | The Gillette Company | Method of coating cutting edges |
US5985459A (en) * | 1996-10-31 | 1999-11-16 | The Gillette Company | Method of treating razor blade cutting edges |
US5980637A (en) * | 1996-12-20 | 1999-11-09 | Steag Rtp Systems, Inc. | System for depositing a material on a substrate using light energy |
EP0854018A1 (en) | 1997-01-17 | 1998-07-22 | Warner-Lambert Company | Reduced friction razor head |
US6488027B1 (en) | 1998-03-10 | 2002-12-03 | Novartis Ag | Powder inhaler |
US6174651B1 (en) | 1999-01-14 | 2001-01-16 | Steag Rtp Systems, Inc. | Method for depositing atomized materials onto a substrate utilizing light exposure for heating |
US20080244908A1 (en) * | 2007-04-04 | 2008-10-09 | Robert Petcavich | Cutting tool |
US8053081B2 (en) | 2007-04-04 | 2011-11-08 | Aculon, Inc. | Cutting tool |
WO2010081119A1 (en) | 2009-01-12 | 2010-07-15 | The Gillette Company | Formation of thin uniform coatings on blade edges using isostatic press |
WO2010081118A1 (en) | 2009-01-12 | 2010-07-15 | The Gillette Company | Formation of thin uniform coatings on blade edges using isostatic press |
WO2016004142A1 (en) | 2014-07-01 | 2016-01-07 | The Gillette Company | Method of treating razor blade cutting edges |
US10118304B2 (en) | 2014-07-01 | 2018-11-06 | The Gillette Company Llc | Method of treating razor blade cutting edges |
US20220298367A1 (en) * | 2017-02-13 | 2022-09-22 | The Gillette Company Llc | Razor blades |
WO2018148175A1 (en) | 2017-02-13 | 2018-08-16 | The Gillette Company Llc | Razor blades |
US20180230320A1 (en) * | 2017-02-13 | 2018-08-16 | The Gillette Company Llc | Razor blades |
WO2018148176A1 (en) | 2017-02-13 | 2018-08-16 | The Gillette Company Llc | Method of treating razor blades |
US11806886B2 (en) | 2017-02-13 | 2023-11-07 | The Gillette Company Llc | Razor blades |
WO2018148177A1 (en) | 2017-02-13 | 2018-08-16 | The Gillette Company Llc | Razor blades |
US11613719B2 (en) | 2018-09-24 | 2023-03-28 | Becton, Dickinson And Company | Self-lubricating medical articles |
US11338321B2 (en) | 2019-05-09 | 2022-05-24 | The Gillette Company Llc | Method for modifying coated razor blade edges |
WO2020227707A1 (en) | 2019-05-09 | 2020-11-12 | The Gillette Company Llc | Methods and apparatuses for modifying razor blade edges |
WO2022049058A1 (en) * | 2020-09-03 | 2022-03-10 | Bic Violex S.A. | Methods and systems for forming a blade of a shaving device |
WO2023192888A1 (en) | 2022-03-31 | 2023-10-05 | The Gillette Company Llc | Blade edge tip measurement |
WO2024036236A1 (en) * | 2022-08-10 | 2024-02-15 | The Gillette Company Llc | Method of treating razor blade cutting edges |
Also Published As
Publication number | Publication date |
---|---|
DOP1960000898A (es) | 1966-02-11 |
OA00177A (fr) | 1966-03-15 |
SE191482C1 (sv) | 1964-09-15 |
BE598698A (zh) | |
NL259570A (zh) | |
DK110230C (da) | 1972-03-27 |
NL123398C (zh) | |
MY6500029A (en) | 1965-12-31 |
FR1299519A (fr) | 1962-07-27 |
CH402655A (de) | 1965-11-15 |
CY300A (en) | 1964-11-07 |
GB906005A (en) | 1962-09-19 |
DE1147141B (de) | 1963-04-11 |
LU39590A1 (zh) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3071856A (en) | Razor blade and method of making same | |
US5263256A (en) | Method of treating razor blade cutting edges | |
US3203829A (en) | Razor blades | |
EP3164226B1 (en) | Method of treating razor blade cutting edges | |
US4012551A (en) | Coated razor blade | |
US3518110A (en) | Razor blade and method of making same | |
US3345202A (en) | Method of making razor blades | |
US5129289A (en) | Shaving razors | |
US5477756A (en) | Method of applying polymers to razor blade cutting edges | |
JPH0692078B2 (ja) | コーティングを施した刃 | |
US3071858A (en) | Razor blade having a coating of a cured solid hydrocarbon polymer on its cutting edge | |
US3402468A (en) | Polytetrafluoroethylene coated razor blade | |
CA1332500C (en) | Shaving razors | |
EP0706424B1 (en) | Method of coating cutting edges | |
US3224900A (en) | Method of making polyethylene coated razor blades | |
US3960608A (en) | Members having a cutting edge | |
US3682795A (en) | Sputter coating of razor blades with a beta-tungsten type alloy |