US3743551A - Razor blades and methods of manufacture thereof - Google Patents

Razor blades and methods of manufacture thereof Download PDF

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Publication number
US3743551A
US3743551A US3743551DA US3743551A US 3743551 A US3743551 A US 3743551A US 3743551D A US3743551D A US 3743551DA US 3743551 A US3743551 A US 3743551A
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United States
Prior art keywords
coating
chromium
razor blade
nitride
manufacture
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Expired - Lifetime
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M Sanderson
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Wilkinson Sword Ltd
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Wilkinson Sword Ltd
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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
    • 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
    • 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
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/926—Thickness of individual layer specified
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/932—Abrasive or cutting feature
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12389—All metal or with adjacent metals having variation in thickness
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12542—More than one such component
    • Y10T428/12549—Adjacent to each other
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12556—Organic component
    • Y10T428/12569—Synthetic resin
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12576—Boride, carbide or nitride component
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12583—Component contains compound of adjacent metal
    • Y10T428/1259—Oxide
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12611—Oxide-containing component
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12778—Alternative base metals from diverse categories
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12826—Group VIB metal-base component
    • Y10T428/12847—Cr-base component
    • Y10T428/12854—Next to Co-, Fe-, or Ni-base component
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers

Definitions

  • This invention relates to razor blades and to methods of manufacture thereof.
  • a razor blade wherein at least a cutting edge has an upper coating of chromium nitride superposed on a lower coating of chromium.
  • the surface region of the lower coating is chromium oxide.
  • the invention also provides the method of manufacturing a razor blade wherein at least a cutting edge is coated with chromium and the chromium coating is thereafter provided with a coating of chromium nitride.
  • the upper coating is provided with a coating of a polymer which improves the shaving properties of the blade and may, for example comprise a fluorocarbon polymer, for example polytetrafiuoroethylene or a copolymer of thiocarbonyl fluoride and tetrafluoroethylene.
  • a fluorocarbon polymer for example polytetrafiuoroethylene or a copolymer of thiocarbonyl fluoride and tetrafluoroethylene.
  • the blade is first provided with a chromium coating on the cutting edge, thereafter a chromium nitride coating is superposed on the first coating and, finally, a polymer coating is provided on the nitride coating.
  • One method of providing a stainless steel razor blade with a double coating in accordance with the present invention is, tfilSt, to form a chromium coating by sputtering chromium onto the previously cleaned cutting edges from electroplated targets at a pressure of between A of a micron and 10 microns of mercury in a residual atmosphere of inert gas such as argon or helium using commercially available ion-plasma sputtering apparatus.
  • the chromium coating may, for example, be of a thickness between 50 and 450 angstroms but preferably not greater than 200 angstroms.
  • the sputtering process is repeated with a residual atmosphere of nitrogen at a pressure of, for example, 1 to 4X10 millimetres of mercury, to form a chromium nitride coating.
  • the blades are exposed to an oxide-forming atmosphere after formation of the initial coating so that the surface region of the initial coating is oxidised.
  • One way of achieving this is by allowing a controlled air leak into the sputtering apparatus between the two coating stages.
  • the nitride coating may have a thickness of, for example, from 50 to 450 angstroms but preferably not greater than 150 angstroms and a preferred range for the thickness of the two coatings together is from to 500 angstroms or even up to 750 angstroms.
  • nitride is intended to embrace coatings over the range from a small amount of nitrogen in solid solution with chromium up to any of the chromium nitride compounds, Cr N, Cr N and ON, or any combination thereof.
  • the composition range may extend from 0.01 atomic percent nitrogen to 55 atomic percent nitrogen.
  • the reaction between chromium and nitrogen in the sputtering process may take place on the surface of the target, or as the metallic particles are being sputtered through the ionised nitrogen plasma or after the metal has been deposited on the blade surface.
  • the gas composition can vary widely depending upon the sputtering conditions.
  • the nitrogen may be diluted with an inert gas, such as argon, from 5 volume percent of the gas in argon to 100 volume percent of the nitrogen or other gas.
  • an inert gas such as argon
  • a gas with a large nitrogen content such as cracked ammonia and/ or air diluted by an inert gas may be used.
  • the sputtering may be direct current or radio frequency sputtering and in the latter case sputtering may be direct from a chromium nitride target in an inert atmosphere.
  • the coatings may be produced by chemical vapour deposition or by reactive evaporation.
  • a razor blade wherein at least a cutting edge has an upper coating of chromium nitride superposed on a lower coating of chromium.
  • each coating has a thickness of between 50 and 450 angstroms.
  • a razor blade according to claim 1 wherein a coating of a shaving facilitating polymer is provided on said upper coating.
  • a razor blade according to claim 1 wherein a coating of a fluorocarbon polymer is provided on said upper coating.
  • a razor blade according to claim 1 wherein a coating of polytetrafluoroethylene is provided on said upper coating.
  • a razor blade according to claim 1 wherein a coating of a copolymer of thio-carbonyl fluoride and tetrafluoro'e'thylene is provided on said upper coating.

Abstract

ON A RAZOR BLADE HAVING AT LEAST ONE CUTTING EDGE THERE IS PROVIDED A FIRST COATING CHROMIUM, WHOSE SURFACE REGION MAY BE OXIDISED, UPON WHICH IS SUPERPOSED A SECOND COATING OF CHROMIUM NITRIDE. A COATING OF A POLYMER WHICH IMPROVES THE SHAVING PROPERTIES OF THE BLADE MAY BE PROVIDED ON THE CHROMIUM NITRIDE COATING.

Description

United States Patent 3,743,551 RAZOR BLADES AND METHODS OF MANUFACTURE THEREOF Michael D. Sanderson, Egham, England, assignor to Wilkinson Sword Limited, London, England No Drawing. Filed Apr. 14, 1971, Ser. No. 140,186 Claims priority, application Great Britain, Apr. 17, 1970, 18,409/ 70 Int. Cl. B26b 21 /54 US. Cl. 148-63 12 Claims ABSTRACT OF THE DISCLOSURE On a razor blade having at least one cutting edge there is provided a first coating of chromium, whose surface region may be oxidised, upon which is superposed a second coating of chromium nitride. A coating of a polymer which improves the shaving properties of the blade may be provided on the chromium nitride coating.
This invention relates to razor blades and to methods of manufacture thereof.
It is known to provide a coating of chromium on the cutting edge of a razor blade and to coat the chromium with polytetrafluoroethylene.
According to the present invention there is provided a razor blade wherein at least a cutting edge has an upper coating of chromium nitride superposed on a lower coating of chromium.
Preferably the surface region of the lower coating is chromium oxide.
The invention also provides the method of manufacturing a razor blade wherein at least a cutting edge is coated with chromium and the chromium coating is thereafter provided with a coating of chromium nitride.
Preferably the upper coating is provided with a coating of a polymer which improves the shaving properties of the blade and may, for example comprise a fluorocarbon polymer, for example polytetrafiuoroethylene or a copolymer of thiocarbonyl fluoride and tetrafluoroethylene.
Thus, in a preferred form of the invention the blade is first provided with a chromium coating on the cutting edge, thereafter a chromium nitride coating is superposed on the first coating and, finally, a polymer coating is provided on the nitride coating.
One method of providing a stainless steel razor blade with a double coating in accordance with the present invention is, tfilSt, to form a chromium coating by sputtering chromium onto the previously cleaned cutting edges from electroplated targets at a pressure of between A of a micron and 10 microns of mercury in a residual atmosphere of inert gas such as argon or helium using commercially available ion-plasma sputtering apparatus. The chromium coating may, for example, be of a thickness between 50 and 450 angstroms but preferably not greater than 200 angstroms. Thereafter the sputtering process is repeated with a residual atmosphere of nitrogen at a pressure of, for example, 1 to 4X10 millimetres of mercury, to form a chromium nitride coating.
Preferably, the blades are exposed to an oxide-forming atmosphere after formation of the initial coating so that the surface region of the initial coating is oxidised. One way of achieving this is by allowing a controlled air leak into the sputtering apparatus between the two coating stages.
3,743,551 Patented July 3, 1973 p CC I The nitride coating may have a thickness of, for example, from 50 to 450 angstroms but preferably not greater than 150 angstroms and a preferred range for the thickness of the two coatings together is from to 500 angstroms or even up to 750 angstroms.
The term nitride is intended to embrace coatings over the range from a small amount of nitrogen in solid solution with chromium up to any of the chromium nitride compounds, Cr N, Cr N and ON, or any combination thereof. Thus for example the composition range may extend from 0.01 atomic percent nitrogen to 55 atomic percent nitrogen.
The reaction between chromium and nitrogen in the sputtering process may take place on the surface of the target, or as the metallic particles are being sputtered through the ionised nitrogen plasma or after the metal has been deposited on the blade surface.
The gas composition can vary widely depending upon the sputtering conditions. Thus, for example, the nitrogen may be diluted with an inert gas, such as argon, from 5 volume percent of the gas in argon to 100 volume percent of the nitrogen or other gas. Alternatively a gas with a large nitrogen content such as cracked ammonia and/ or air diluted by an inert gas may be used.
The sputtering may be direct current or radio frequency sputtering and in the latter case sputtering may be direct from a chromium nitride target in an inert atmosphere.
As an alternative to sputtering the coatings may be produced by chemical vapour deposition or by reactive evaporation.
I claim:
1. A razor blade wherein at least a cutting edge has an upper coating of chromium nitride superposed on a lower coating of chromium.
2. A razor blade according to claim 1, wherein the surface region of said lower coating is chromium oxide.
3. A razor blade according to claim 1, wherein each coating has a thickness of between 50 and 450 angstroms.
4. A razor blade according to claim 1, wherein said lower coating has a thickness of between 70 and 200 angstroms.
5. A razor blade according to claim 1, wherein said upper coating has a thickness of between 50 and angstroms.
6. A razor blade according to claim 1, wherein a coating of a shaving facilitating polymer is provided on said upper coating.
7. A razor blade according to claim 1, wherein a coating of a fluorocarbon polymer is provided on said upper coating.
8. A razor blade according to claim 1, wherein a coating of polytetrafluoroethylene is provided on said upper coating.
9. A razor blade according to claim 1, wherein a coating of a copolymer of thio-carbonyl fluoride and tetrafluoro'e'thylene is provided on said upper coating.
10. The method of manufacturing a razor blade wherein at least a cutting edge is coated with chromium and the chromium coating is thereafter provided with a coating of chromium nitride.
11. The method according to claim 10, wherein at least the surface region of the initial chromium coating is oxidised.
12. The method according to claim 10, wherein each 6618472 3/1967 Netherlands 30346.53
coating is applied by ion-plasma sputtering. 1,200,165 7/ 1970 Great Britain 148--16.6
References Cited OTHER REFERENCES UNITED STATES PATENTS 5 Chem. Abstracts, vol. 67: 35237t (1967).
3,480,483 11/1969 Wilkinson 1486.3 1 94 025 1 1934 Frost 14 1 RALPH KENDALL, Prlmary Examlner FOREIGN PATENTS 1,193,067 5/1970 Great Britain 30 346 54 10 30-346.54; 29-195, 196.6; 14816.6; 204-192; 117
1,065,724 4/1967 Great Britain 30346.54 71 M
US3743551D 1970-04-17 1971-04-14 Razor blades and methods of manufacture thereof Expired - Lifetime US3743551A (en)

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AT (1) AT320472B (en)
BE (1) BE765869A (en)
BG (1) BG19094A3 (en)
BR (1) BR7102060D0 (en)
CA (2) CA989687A (en)
CH (1) CH532987A (en)
DE (2) DE2118211B2 (en)
ES (1) ES196198Y (en)
FI (1) FI52174C (en)
FR (1) FR2089640A5 (en)
GB (1) GB1342071A (en)
IE (1) IE36006B1 (en)
IL (1) IL36603A (en)
LU (1) LU63002A1 (en)
NO (1) NO135203C (en)
PL (1) PL83264B1 (en)
RO (1) RO61556A (en)
SU (1) SU513605A3 (en)
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Cited By (28)

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US3811189A (en) * 1971-07-09 1974-05-21 Gillette Co Process for producing an improved cutting tool
US3871836A (en) * 1972-12-20 1975-03-18 Allied Chem Cutting blades made of or coated with an amorphous metal
US3960608A (en) * 1972-08-05 1976-06-01 Wilkinson Sword Limited Members having a cutting edge
US4071382A (en) * 1976-07-22 1978-01-31 Midland-Ross Corporation Method for case hardening powdered metal parts
US4411964A (en) * 1980-12-24 1983-10-25 Nippon Kokan Kabushiki Kaisha Composite coating steel sheets having good corrosion resistance paintability and corrosion resistance after paint coating
US4683043A (en) * 1986-01-21 1987-07-28 Battelle Development Corporation Cubic boron nitride preparation
US4744679A (en) * 1985-09-27 1988-05-17 Skf Industrial Trading And Development Co. B.V. Plastic cage for a rolling bearing
US4919773A (en) * 1984-11-19 1990-04-24 Avco Corporation Method for imparting erosion-resistance to metallic substrates
US5232568A (en) * 1991-06-24 1993-08-03 The Gillette Company Razor technology
US5648178A (en) * 1994-01-04 1997-07-15 Chevron Chemical Company Reactor system steel portion
US5669144A (en) * 1991-11-15 1997-09-23 The Gillette Company Razor blade technology
US6258256B1 (en) 1994-01-04 2001-07-10 Chevron Phillips Chemical Company Lp Cracking processes
US6274113B1 (en) 1994-01-04 2001-08-14 Chevron Phillips Chemical Company Lp Increasing production in hydrocarbon conversion processes
WO2001064406A3 (en) * 2000-02-29 2002-02-07 Gillette Co Razor blade technology
US6419986B1 (en) 1997-01-10 2002-07-16 Chevron Phillips Chemical Company Ip Method for removing reactive metal from a reactor system
US20040172832A1 (en) * 2003-03-04 2004-09-09 Colin Clipstone Razor blade
WO2005005110A1 (en) * 2003-07-15 2005-01-20 Koninklijke Philips Electronics N.V. A coated cutting member having a nitride hardened substrate
US20050268470A1 (en) * 2004-06-03 2005-12-08 Skrobis Kenneth J Colored razor blades
US20070124944A1 (en) * 2005-11-30 2007-06-07 Eveready Battery Company, Inc. Razor blade and method of making it
US20080190758A1 (en) * 2004-09-08 2008-08-14 Vassilis Papachristos Method of Deposition of a Layer on a Razor Blade Edge and Razor Blade
US20090025512A1 (en) * 2007-07-25 2009-01-29 John Madeira Thin film coating of blades
US20090314136A1 (en) * 2008-06-23 2009-12-24 The Stanley Works Method of manufacturing a blade
US20100299931A1 (en) * 2009-05-26 2010-12-02 Krassimir Grigorov Marchev Strengthened razor blade
US8769833B2 (en) 2010-09-10 2014-07-08 Stanley Black & Decker, Inc. Utility knife blade
WO2016057473A1 (en) 2014-10-06 2016-04-14 Edgewell Personal Care Brands, Llc Method of shaping a surface coating on a razor blade
US9969094B2 (en) 2014-10-06 2018-05-15 Edgewell Personal Care Brands, Llc Method of shaping a surface coating on a razor blade using centrifugal force
EP3639991A1 (en) 2018-10-19 2020-04-22 Edgewell Personal Care Brands, LLC Razor blade and method of making it
WO2023028420A1 (en) 2021-08-24 2023-03-02 Edgewell Personal Care Brands, Llc System and method for coating a blade

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AT385058B (en) * 1946-07-17 1988-02-10 Vni Instrument Inst METHOD FOR MOUNTING CUTTING TOOLS
US3916523A (en) * 1969-09-29 1975-11-04 Warner Lambert Co Coated razor blade
US4209017A (en) * 1970-08-13 1980-06-24 Shaw Robert F Surgical instrument having self-regulating radiant heating of its cutting edge and method of using the same
AU485283B2 (en) * 1971-05-18 1974-10-03 Warner-Lambert Company Method of making a razorblade
GB1420941A (en) * 1972-04-08 1976-01-14 Wilkinson Sword Ltd Razor blades
GB1423831A (en) * 1972-04-08 1976-02-04 Wilkinson Sword Ltd Razor blades
US3912611A (en) * 1973-03-12 1975-10-14 Bell Telephone Labor Inc Film material and devices using same
GB1525433A (en) * 1977-04-18 1978-09-20 Gillette Co Coating process
CH652629A5 (en) * 1981-03-02 1985-11-29 Vsesoyuzny Ni Instr I Cutting tool with coatings.
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BG19094A3 (en) 1975-04-30
CA989687A (en) 1976-05-25
DE2118211B2 (en) 1980-07-31
IL36603A (en) 1974-03-14
SU513605A3 (en) 1976-05-05
CH532987A (en) 1973-01-31
PL83264B1 (en) 1975-12-31
DE2118212A1 (en) 1971-10-28
BE765869A (en) 1971-10-18
NO135203B (en) 1976-11-22
FI52174B (en) 1977-03-31
CA927224A (en) 1973-05-29
TR17249A (en) 1976-08-03
AT320472B (en) 1975-02-10
IL36603A0 (en) 1971-06-23
BR7102060D0 (en) 1973-04-05
US3774703A (en) 1973-11-27
ES196198U (en) 1980-03-16
ES196198Y (en) 1982-06-01
IE36006L (en) 1971-10-17
FR2089640A5 (en) 1972-01-07
RO61556A (en) 1976-12-15
GB1342071A (en) 1973-12-25
DE2118211A1 (en) 1971-10-28
FI52174C (en) 1977-07-11
LU63002A1 (en) 1971-08-26
ZA712333B (en) 1972-01-26
NO135203C (en) 1977-03-02
IE36006B1 (en) 1976-07-21
ZA712332B (en) 1972-01-26

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