GB379392A - Improvements in or relating to fine edged blades and method of making the same - Google Patents

Improvements in or relating to fine edged blades and method of making the same

Info

Publication number
GB379392A
GB379392A GB1597931D GB1597931D GB379392A GB 379392 A GB379392 A GB 379392A GB 1597931 D GB1597931 D GB 1597931D GB 1597931 D GB1597931 D GB 1597931D GB 379392 A GB379392 A GB 379392A
Authority
GB
United Kingdom
Prior art keywords
blades
blade
nitrogenized
cutting edges
rough
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1597931D
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US455366A external-priority patent/US1827870A/en
Application filed by Individual filed Critical Individual
Priority to GB1597931D priority Critical patent/GB379392A/en
Publication of GB379392A publication Critical patent/GB379392A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/04—Treatment of selected surface areas, e.g. using masks
    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Scissors And Nippers (AREA)
  • Knives (AREA)

Abstract

379,392. Nitrogenizing ferrous alloys. FROST, T. H., 116, Riverway, Boston, U.S.A. June 1, 1931, No. 15979. Addition to 378,543. [Classes 72 and 82 (i).] A safety razor, or other fine-edged blade is nitrogenized only along its cutting edges, either by electroplating its entire surface with tin, copper, silver, nickel, or chromium and then roughgrinding the cutting edges so that they alone are exposed to the action of the ammonia ; or by clamping a stack of rough-ground blades 10 between clamps 20, 22 which expose only their cutting edges, or by using both these methods together, the clamps preventing distortion of the blade. Spacing shims may be used in the stack of blades. After nitrogenization, safetyrazor blades are given a final grinding but for other blades this may not be necessary. The blades are plated and rough ground in the form of a ribbon and may also be nitrogenized in this form or as individual blanks. To yield a rough edge when finished the blade is nitrogenized for two hours at 950‹ F. Nitrogenization for twenty minutes at 1150‹ F. yields softer edges which are smoother when finished. Intermediate temperatures and times may be used. Any distortion which may result will be absorbed in the soft areas at the ends of the slot. The preferred alloy used is " Nitralloy " or a ferrous alloy containing a substantial amount of aluminium combined with chromium, tungsten, or molybdenum. The percentage proportions of two preferred alloys are stated. The blade, which is of the kind having a medial slot 12 and corner recesses, is rustproof and when silver-plated may be polished.
GB1597931D 1930-05-24 1931-06-01 Improvements in or relating to fine edged blades and method of making the same Expired GB379392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1597931D GB379392A (en) 1930-05-24 1931-06-01 Improvements in or relating to fine edged blades and method of making the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US455366A US1827870A (en) 1930-05-24 1930-05-24 Fine edged blade
GB1597931D GB379392A (en) 1930-05-24 1931-06-01 Improvements in or relating to fine edged blades and method of making the same

Publications (1)

Publication Number Publication Date
GB379392A true GB379392A (en) 1932-09-01

Family

ID=31948057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1597931D Expired GB379392A (en) 1930-05-24 1931-06-01 Improvements in or relating to fine edged blades and method of making the same

Country Status (1)

Country Link
GB (1) GB379392A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112873418A (en) * 2021-01-05 2021-06-01 佛山市洵腾科技有限公司 Novel 3D printing equipment for cutting soft tissue

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112873418A (en) * 2021-01-05 2021-06-01 佛山市洵腾科技有限公司 Novel 3D printing equipment for cutting soft tissue

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