US1992565A - Safety razor blade - Google Patents

Safety razor blade Download PDF

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Publication number
US1992565A
US1992565A US634439A US63443932A US1992565A US 1992565 A US1992565 A US 1992565A US 634439 A US634439 A US 634439A US 63443932 A US63443932 A US 63443932A US 1992565 A US1992565 A US 1992565A
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Prior art keywords
blade
safety razor
corners
razor blade
corner
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Expired - Lifetime
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US634439A
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Biegmann Otto
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Individual
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    • 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
    • B26B21/08—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 involving changeable blades
    • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
    • B26B21/18—Safety razors with one or more blades arranged transversely to the handle involving blades with two cutting edges

Definitions

  • the guard and cover plates of safety razors serving to secure the safety razor blades are made in many varying forms, in particular also in so far as the correct positioning of the blade is to 5 be effected by the shape, and consequently the blades adapted to fit these safety razors also have shapes differing from each other, a particular type of blade having to be used for a particular safety razor. Now in order that it should not be necessary to be restricted to a particular blade when using a safety razor, it is desirable to make blades which are adapted for use with as many kinds of safety razors as possible.
  • the said problem is solved, according to the invention, by providing a blade, the center slot of which is adapted to take both the usual centering pins and also a centering strip on the cover plate, while the corners of the blade are so formed that they are very exactly adjusted by thickened parts, abutments and the like, which may if necessary be provided on the cover and guard plates.
  • FIG. 1 shows in perspective a double-edged blade placed in a safety razor provided with a guard plate, a cover plate and centering studs.
  • Fig. 2 is a plan view of the blade.
  • the double edged blade 11 is provided with a slot 12 which at the center and at each end has enlargements 13 for the passage of the threaded pin serving for fastening the handle and of the usual centering studs, and which also permits the penetration of centering strips such as are usual instead of studs.
  • the cutting edges 14 are longer than the slot 12, being slightly rounded at the corners 15, so that they project a little at the sides beyond the guard and cover plates. This enables otherwise difiicultly accessible places, as, for example, the angle between the side of the nose and the cheek, to be shaved by the blade.
  • the angular or otherwise formed holes 16 at the four corners serve for the exact adjustment of the blade.
  • the corners 17 of the cover plate which thereby automatically effect an exact adjustment of the blade.
  • the corners 17 be arranged so as to be slightly thickened downwardly, as is shown in the drawing, they can penetrate into the recesses and exert an exact adjusting efleet upon the blades. Even when the corners of the cover plate have been bent downward by rough treatment, they can penetrate into the holes and exert no injurious influence upon the clamped blade.
  • the double-edged blade so shaped may thus be used for a large number of existing safety razors, the most exact adjustment of the blade in each of these shaving devices being ensured.
  • a safety razor blade of thin flexible metal and of oblong shape the two side edges of the blade being sharpened to form cutting edges, the blade having rounded corners tangential to the cutting edges and the ends of the blade, said blade also having a hole in each corner opposite the point of merging of the cutting edge and the rounded corner, the blade having a longitudinally disposed slot approximately as long as the 1ongitudinal distance between the holes, thus forming a bending portion at each end of the blade with blade material connecting said bending portion with the cutting edge both inside and also around the outer sides of said holes.
  • a thin flexible safety razor blade of oblong shape the side edges being sharpened to form cutting edges, the blade having holes near the edges at the corners, the corners being rounded, each corner having a radius the center of which is within the area of a hole.
  • a thin flexible razor blade of oblong shape having a hole in each corner near the edge and having the corners of the blade rounded, each corner having a radius with its center inside the area of the hole in that corner, the side edges of the blade being sharpened to the juncture of the said edge and the rounded corner.

Description

Feb. 26, 1935. o. BIEGMANN I SAFETY RAZOR BLADE Filed Sept. 22, 1932 HUGH. l'OY Attorn eg Patented Feb. 26 1935 SAFETY RAZOR BLADE Otto Biegmann, Solingen, Germany Application September 22, 1932, Serial No. 634,439 In Germany December 10, 1931 3 Claims.
The guard and cover plates of safety razors serving to secure the safety razor blades are made in many varying forms, in particular also in so far as the correct positioning of the blade is to 5 be effected by the shape, and consequently the blades adapted to fit these safety razors also have shapes differing from each other, a particular type of blade having to be used for a particular safety razor. Now in order that it should not be necessary to be restricted to a particular blade when using a safety razor, it is desirable to make blades which are adapted for use with as many kinds of safety razors as possible. The said problem is solved, according to the invention, by providing a blade, the center slot of which is adapted to take both the usual centering pins and also a centering strip on the cover plate, while the corners of the blade are so formed that they are very exactly adjusted by thickened parts, abutments and the like, which may if necessary be provided on the cover and guard plates.
In describing the invention in detail, reference will be had to the accompanying drawing forming part of the application, wherein like characters denote corresponding parts in the several views, and in which Fig. 1 shows in perspective a double-edged blade placed in a safety razor provided with a guard plate, a cover plate and centering studs.
Fig. 2 is a plan view of the blade.
The double edged blade 11 is provided with a slot 12 which at the center and at each end has enlargements 13 for the passage of the threaded pin serving for fastening the handle and of the usual centering studs, and which also permits the penetration of centering strips such as are usual instead of studs. The cutting edges 14 are longer than the slot 12, being slightly rounded at the corners 15, so that they project a little at the sides beyond the guard and cover plates. This enables otherwise difiicultly accessible places, as, for example, the angle between the side of the nose and the cheek, to be shaved by the blade. The angular or otherwise formed holes 16 at the four corners serve for the exact adjustment of the blade. Into these holes fit the corners 17 of the cover plate which thereby automatically effect an exact adjustment of the blade. In particular, if the corners 17 be arranged so as to be slightly thickened downwardly, as is shown in the drawing, they can penetrate into the recesses and exert an exact adjusting efleet upon the blades. Even when the corners of the cover plate have been bent downward by rough treatment, they can penetrate into the holes and exert no injurious influence upon the clamped blade.
The double-edged blade so shaped may thus be used for a large number of existing safety razors, the most exact adjustment of the blade in each of these shaving devices being ensured.
I claim:
1. A safety razor blade of thin flexible metal and of oblong shape, the two side edges of the blade being sharpened to form cutting edges, the blade having rounded corners tangential to the cutting edges and the ends of the blade, said blade also having a hole in each corner opposite the point of merging of the cutting edge and the rounded corner, the blade having a longitudinally disposed slot approximately as long as the 1ongitudinal distance between the holes, thus forming a bending portion at each end of the blade with blade material connecting said bending portion with the cutting edge both inside and also around the outer sides of said holes.
2. A thin flexible safety razor blade of oblong shape the side edges being sharpened to form cutting edges, the blade having holes near the edges at the corners, the corners being rounded, each corner having a radius the center of which is within the area of a hole.
3. A thin flexible razor blade of oblong shape having a hole in each corner near the edge and having the corners of the blade rounded, each corner having a radius with its center inside the area of the hole in that corner, the side edges of the blade being sharpened to the juncture of the said edge and the rounded corner. 1
' OTTO BIEGMANN.
US634439A 1931-12-10 1932-09-22 Safety razor blade Expired - Lifetime US1992565A (en)

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DE1992565X 1931-12-10

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD633253S1 (en) 2010-06-23 2011-02-22 American Safety Razor Razor cartridge
USD640415S1 (en) 2010-07-07 2011-06-21 American Safety Razor Razor cartridge
USD643977S1 (en) 2010-10-19 2011-08-23 American Safety Razor Razor cartridge
USD643976S1 (en) 2010-10-19 2011-08-23 American Safety Razor Razor cartridge
USD648075S1 (en) 2010-07-07 2011-11-01 American Safety Razor Razor cartridge
US20140041239A1 (en) * 2012-04-26 2014-02-13 Thomas Scimone Ceramic cutting blades
US20170266825A1 (en) * 2014-12-10 2017-09-21 Bic-Violex S.A. A shaving blade assembly comprising a blade unit and a skin contact member and a razor comprising a razor handle and such a shaving blade assembly

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD633253S1 (en) 2010-06-23 2011-02-22 American Safety Razor Razor cartridge
USD640415S1 (en) 2010-07-07 2011-06-21 American Safety Razor Razor cartridge
USD648075S1 (en) 2010-07-07 2011-11-01 American Safety Razor Razor cartridge
USD643977S1 (en) 2010-10-19 2011-08-23 American Safety Razor Razor cartridge
USD643976S1 (en) 2010-10-19 2011-08-23 American Safety Razor Razor cartridge
US20140041239A1 (en) * 2012-04-26 2014-02-13 Thomas Scimone Ceramic cutting blades
US20170266825A1 (en) * 2014-12-10 2017-09-21 Bic-Violex S.A. A shaving blade assembly comprising a blade unit and a skin contact member and a razor comprising a razor handle and such a shaving blade assembly
US11224983B2 (en) * 2014-12-10 2022-01-18 Bic-Volex Sa Shaving blade assembly comprising a blade unit and a skin contact member and a razor comprising a razor handle and such a shaving blade assembly

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