US1846622A - Safety blade - Google Patents

Safety blade Download PDF

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Publication number
US1846622A
US1846622A US496026A US49602630A US1846622A US 1846622 A US1846622 A US 1846622A US 496026 A US496026 A US 496026A US 49602630 A US49602630 A US 49602630A US 1846622 A US1846622 A US 1846622A
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US
United States
Prior art keywords
blade
razor
safety
edge
sharpened
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
Application number
US496026A
Inventor
Ralph E Thompson
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.)
Gillette Co LLC
Original Assignee
Gillette Safety Razor Co
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
Application filed by Gillette Safety Razor Co filed Critical Gillette Safety Razor Co
Priority to US496026A priority Critical patent/US1846622A/en
Application granted granted Critical
Publication of US1846622A publication Critical patent/US1846622A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00Razors 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
    • B26B21/40Details or accessories
    • B26B21/4006Blades or blade units with discontinuous cutting edges, e.g. wire-wrapped, notches
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S76/00Metal tools and implements, making
    • Y10S76/08Razor blade manufacturing

Definitions

  • rIhis invention relates to razors, and relates more particularly to a safety blade for razors.
  • An object of the invention is to provide a razor bladeh'aving a safety edge, that is, an edge which is self protected in such manner as to prevent it from cutting the skin, Without materially impairing its effectiveness for shaving.
  • the ordinary type of safety razor having a blade with two edges, is provided with a rigid guard memberand a rigid cap member between which the razor blade is clamped.
  • The, arrangement of the co-operating elements of the razor is such that the blade edge is given a position, relative the guard member, which is believed to be the most satisfactory for shaving with the particular type Any inequalities in manufacture,
  • a blade having a safety edge is provided which can be employed in, or as a part of, a razor of the open blade type, which will then have the protective quality of the safety razor, although lacking aa guard considered'as a part distinct from, or separated from, the blade itself.
  • the blade can also be employed in a-razor of any design in which .a guard forL the cutting edges is provided. In the latter case, the razor will have an additional element of safety, which Ais advantageous inthe case of safety razors having blades which are adjustable to vary the exposure of the blade edge.
  • a safety razor blade according to this invention, can be 'used in a detachable blade razor without the necessity fora guard member, the safety edge being sufficient in itself to prevent danger of cutting the skin, and 7since a guard is not essential, the diiiculties of correctly positioning the edge of a blade, withl respect toy a guard member, are avoided.
  • a razor blade is sharpened, as is customary, and after being sharpened, portions of the cutting edges are built up by deposits of metal, Bakelite, or other suitable material on the lcutting edge, these built up portions resulting finally in a razor blade having a large number of alternate dull and sharp portions, the dull portions being the built up deposits of material with the sharpened portions between them'.
  • Fig. 1 is a side elevation of a portion of a razor, blade, and y -Fig. 2 is a transverse section on the line 2-2 of Fig. l.
  • the numeral 3 indicates which has been closely deposited the large number of spots of material 5.
  • the spots 5 may be spots of metal which have been sprayed upon the' edge' 4, may be spots of metal which have been plated, or otherwise suitably attached, or may be drops of Bakelite lacquer, or other suitable material which dull portions, a clean and comfortable shave ⁇ 9 can be obtained from a blade of this character, it being necessary to merely repeat the stroke of the razor a few times, as is customarily done by most persons in shaving.
  • the blade 3 maybe sharpened by the usual commercial methods used in manufacturing blades because itsA cutting edge is initially continuous and uninterrupted. It is then converted into a safety blade by having the series o'f'curved spots or" drops 5 deposited at regular intervals along its sharpened edge. It is, of course, impracticable to resharpen the blade Without removing the spots and so destroying its safety characteristic. The manufacturer is thusprotected against improperly or unskillfully resharpened blades finding their Way into the market.
  • a safety razor ⁇ blade having a continuously sharpened edge divided into sharpened and dull portions by spaced deposits of maferial individually secured upon said edge.
  • a safety razor blade provided at a shaving edge with a series of alternating sharp and dull portions of limited extent, the dull portions being provided by separate deposits of material individually attached to the shaving edge.
  • a safety razor blade having a sharpened edge divided into sharp and dull portions by deposits of lacquer which are baked on said ed e.
  • a safety blade for a razor having a continuously beveled cutting edge and a series of rounded drops individually united thereto, overlapping said cutting edge and providing collectively an interrupted guard therefore as Well as a preventative for resharpening.

Description

Fell 23, 1932. l R. E. THOMPSON 1,846,622
` SAFETY BLADE Filed Nov. 15, 1930 Snom/woz @@1143 8MM/m13 Patented Feb. 23, 1932 UNITED STATES PATENT'OFFICE RALPH E. THOMPSON, F BROOKLINE, MASSACHUSETTS, 'ASSIGNOR TO GILLETT'E SAFETY RAZOR COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF DELA- 'WARE SAFETY BLADE I Application filed November 15, 1930. Serial No. 496,026.
rIhis invention relates to razors, and relates more particularly to a safety blade for razors.
Y blade. however, and variations in adjustment result An object of the invention is to provide a razor bladeh'aving a safety edge, that is, an edge which is self protected in such manner as to prevent it from cutting the skin, Without materially impairing its effectiveness for shaving. v
The ordinary type of safety razor, having a blade with two edges, is provided with a rigid guard memberand a rigid cap member between which the razor blade is clamped. The, arrangement of the co-operating elements of the razor is such that the blade edge is given a position, relative the guard member, which is believed to be the most satisfactory for shaving with the particular type Any inequalities in manufacture,
in the blade edges, at times, notbeing in their correct position relative the guards of the This results in the fact that while one blade may be equally as sharp as another blade, still it will not perform as satisfactorily-in a razor, due to the fact that its Width may vary slightly, due to manufacturing inequalities. Likewise, in clamping the holder together, one blade may fit the holder more satisfactorily than another so that the shavv ing edge of one blade may perform more satisfactorily than another, this regardless of the quality of the blades.
-According to this invention, a blade having a safety edge is provided which can be employed in, or as a part of, a razor of the open blade type, which will then have the protective quality of the safety razor, although lacking aa guard considered'as a part distinct from, or separated from, the blade itself. The blade, according to this invention, can also be employed in a-razor of any design in which .a guard forL the cutting edges is provided. In the latter case, the razor will have an additional element of safety, which Ais advantageous inthe case of safety razors having blades which are adjustable to vary the exposure of the blade edge. Furthermore, a safety razor blade, according to this invention, can be 'used in a detachable blade razor without the necessity fora guard member, the safety edge being sufficient in itself to prevent danger of cutting the skin, and 7since a guard is not essential, the diiiculties of correctly positioning the edge of a blade, withl respect toy a guard member, are avoided.
According to this invention, a razor blade is sharpened, as is customary, and after being sharpened, portions of the cutting edges are built up by deposits of metal, Bakelite, or other suitable material on the lcutting edge, these built up portions resulting finally in a razor blade having a large number of alternate dull and sharp portions, the dull portions being the built up deposits of material with the sharpened portions between them'.
f The invention will now be explained with l reference to the drawings, of which:
Fig. 1 is a side elevation of a portion of a razor, blade, and y -Fig. 2 is a transverse section on the line 2-2 of Fig. l.
In the drawings, the numeral 3 indicates which has been closely deposited the large number of spots of material 5. The spots 5 may be spots of metal which have been sprayed upon the' edge' 4, may be spots of metal which have been plated, or otherwise suitably attached, or may be drops of Bakelite lacquer, or other suitable material which dull portions, a clean and comfortable shave `9 can be obtained from a blade of this character, it being necessary to merely repeat the stroke of the razor a few times, as is customarily done by most persons in shaving.
Whereas one embodiment of the invention 75 a razor blade, on the sharpened edge 4 of has been described 'for the purpose of illustration, it should be understood that the invention is not limited to the exact details described, as many departures may be made by l those skilled in they art without departing from the spirit of the invention.
It will be' noted that the blade 3 maybe sharpened by the usual commercial methods used in manufacturing blades because itsA cutting edge is initially continuous and uninterrupted. It is then converted into a safety blade by having the series o'f'curved spots or" drops 5 deposited at regular intervals along its sharpened edge. It is, of course, impracticable to resharpen the blade Without removing the spots and so destroying its safety characteristic. The manufacturer is thusprotected against improperly or unskillfully resharpened blades finding their Way into the market.
What is claimed is:
l. A safety razor `blade having a continuously sharpened edge divided into sharpened and dull portions by spaced deposits of maferial individually secured upon said edge.
2. A safety razor blade provided at a shaving edge with a series of alternating sharp and dull portions of limited extent, the dull portions being provided by separate deposits of material individually attached to the shaving edge.
3. A safety razor blade having a sharpened edge divided into sharp and dull portions by deposits of lacquer which are baked on said ed e.
A safety blade for a razor, having a continuously beveled cutting edge and a series of rounded drops individually united thereto, overlapping said cutting edge and providing collectively an interrupted guard therefore as Well as a preventative for resharpening.
Signed at Boston, Massachusetts, this 14th day of November, 1930.
^RALPH E. THOMPSON.
US496026A 1930-11-15 1930-11-15 Safety blade Expired - Lifetime US1846622A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2703451A (en) * 1950-03-04 1955-03-08 Hensel Herman Struve Cutting instrument having means for indicating usage
US3263330A (en) * 1964-09-21 1966-08-02 Alfred W Ferrara Safety razor blade
US3750285A (en) * 1970-07-06 1973-08-07 G Michelson Guarded razor edge apparatus
US3996664A (en) * 1974-11-05 1976-12-14 Lee Herbert P Non-scratching knife
US4094066A (en) * 1977-03-08 1978-06-13 Daniel Jr Donald S Surgical razor blade with integral guard
US4211006A (en) * 1979-01-02 1980-07-08 Warner-Lambert Company Guarded razor blade
US4252837A (en) * 1976-03-23 1981-02-24 Warner-Lambert Company Blade shields
US5447084A (en) * 1992-03-06 1995-09-05 Althaus; Wolfgang Razor head of a wet razor
US20040187644A1 (en) * 2003-02-25 2004-09-30 Eveready Battery Company, Inc. Method for manufacturing a razor blade
US20070062047A1 (en) * 2005-09-19 2007-03-22 Andrew Zhuk Razor blades
IT201900018473A1 (en) * 2019-10-10 2021-04-10 Hic S R L RAZOR FOR THINNING HAIR OR HAIR.
US11453137B2 (en) * 2017-12-05 2022-09-27 Koninklijke Philips N.V. Shaving assembly and hair cutting appliance

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2703451A (en) * 1950-03-04 1955-03-08 Hensel Herman Struve Cutting instrument having means for indicating usage
US3263330A (en) * 1964-09-21 1966-08-02 Alfred W Ferrara Safety razor blade
US3750285A (en) * 1970-07-06 1973-08-07 G Michelson Guarded razor edge apparatus
US3996664A (en) * 1974-11-05 1976-12-14 Lee Herbert P Non-scratching knife
US4252837A (en) * 1976-03-23 1981-02-24 Warner-Lambert Company Blade shields
US4094066A (en) * 1977-03-08 1978-06-13 Daniel Jr Donald S Surgical razor blade with integral guard
US4211006A (en) * 1979-01-02 1980-07-08 Warner-Lambert Company Guarded razor blade
US5447084A (en) * 1992-03-06 1995-09-05 Althaus; Wolfgang Razor head of a wet razor
US20040187644A1 (en) * 2003-02-25 2004-09-30 Eveready Battery Company, Inc. Method for manufacturing a razor blade
US20070062047A1 (en) * 2005-09-19 2007-03-22 Andrew Zhuk Razor blades
US11453137B2 (en) * 2017-12-05 2022-09-27 Koninklijke Philips N.V. Shaving assembly and hair cutting appliance
IT201900018473A1 (en) * 2019-10-10 2021-04-10 Hic S R L RAZOR FOR THINNING HAIR OR HAIR.

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