EP1724074B1 - Razor blade and the use thereof - Google Patents

Razor blade and the use thereof Download PDF

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Publication number
EP1724074B1
EP1724074B1 EP06013580A EP06013580A EP1724074B1 EP 1724074 B1 EP1724074 B1 EP 1724074B1 EP 06013580 A EP06013580 A EP 06013580A EP 06013580 A EP06013580 A EP 06013580A EP 1724074 B1 EP1724074 B1 EP 1724074B1
Authority
EP
European Patent Office
Prior art keywords
cutting edge
razor blade
razor
edge length
length
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.)
Not-in-force
Application number
EP06013580A
Other languages
German (de)
French (fr)
Other versions
EP1724074A2 (en
EP1724074A3 (en
Inventor
Stefan Lenk
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.)
Tondeo Werk GmbH
Original Assignee
Tondeo Werk Adolf Noss Firma
Tondeo Werk GmbH
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 Tondeo Werk Adolf Noss Firma, Tondeo Werk GmbH filed Critical Tondeo Werk Adolf Noss Firma
Priority to DE602006015564T priority Critical patent/DE602006015564D1/en
Priority to EP06013580A priority patent/EP1724074B1/en
Priority to AT06013580T priority patent/ATE474697T1/en
Priority to DE200620014663 priority patent/DE202006014663U1/en
Publication of EP1724074A2 publication Critical patent/EP1724074A2/en
Publication of EP1724074A3 publication Critical patent/EP1724074A3/en
Application granted granted Critical
Publication of EP1724074B1 publication Critical patent/EP1724074B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B26B21/40—Details or accessories
    • B26B21/4006—Blades or blade units with discontinuous cutting edges, e.g. wire-wrapped, notches
    • 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
    • B26B21/56—Razor-blades characterised by the shape

Definitions

  • the invention relates to a razor blade for line-shaped shaving of zones of human hair with a cutting edge on a longitudinal side of the razor blade and the use thereof.
  • This type of razor blade for a handheld razor is known, for example from DE1553829A ( Figs. 8 and 9 ), DE1553830A or GB 456,568 .
  • this razor blade is broken in half over its length and one half of the razor blade is connected to the handheld razor, wherein openings on the razor blade are used to fix it to a receiver of the handheld razor,
  • This razor blade has a cutting edge along the entire longitudinal side. Because of the constraint from this long cutting edge, this razor blade cannot be used to target narrow shaving areas or shaving lines (for tattoos and the like) of human hair with a strong shaving area contour.
  • a blade for a hair-cutting device having at least one longitudinal edge which comprises cutting portions and noncutting portions alternately spaced along the length of the said longitudinal edge, the blade having apertures therein to enable it to be adjustably secured to a hair-cutting device.
  • the Hair-cutting device has a row of parallel teeth 24 which can be displaced with respect to the cutting edge of the blade. The cutting portions and noncutting portions lie alternately between adjacent teeth 24 of the row of teeth.
  • this blade is not suitable as a razor blade and cannot be used to target narrow shaving areas or shaving lines (for tattoos and the like) of human hair with a strong shaving area contour.
  • GB 2391190 A discloses a razor for shaving in addition to trimming/styling ones beard.
  • the razor is characterised by a razor head having a centrally spaced gap portion in which also is disposed sunken blades.
  • the gap provides the beard being trimmed within the area of the gap whereas the skin is shaved aside the gap. Because of the arrangement of two blades spaced to each in order to form the gap the razor can also not be used to get narrow shaving areas or shaving lines.
  • the object of the invention is to obtain a generically equivalent razor blade, which does not have the aforementioned disadvantage, enables simple handling, and can be produced economically.
  • Fig. 1 shows a first razor blade 1.1 with a cutting edge 2.1 on a longitudinal side 3 of the razor blade 1.1.
  • the cutting edge 2.1 has a cutting length L1 that is less than one half the length L of the longitudinal side 3.
  • the cutting edge 2.1 is located on one side of the longitudinal side 3, wherein an area 5.1 of the cutting edge 2.1, which is cut out from the longitudinal side 3, is designed to be recessed relative and parallel to the cutting edge 2.1.
  • the cut-out area 5.1 (5.2, 5.3/ Fig. 5/6 ) is formed by punch-out, grind-out, or erosion (for example before or after production or sharpening of the cutting edge 2.1).
  • the razor blade 1.1 shown in Fig. 1 is formed from a standard blade 7 divided up along the length, which is shown as an undivided standard blade 7 in Fig. 7 and is supplied as such.
  • This standard blade 7 for a handheld razor 6 is known, for example, from DE1553829A ( Figs. 8 and 9 ).
  • the undivided razor blade 1.1 as per Fig. 4 has two opposing cutting edges 2.1, a center longitudinal cut-out 8, and fixation openings 9, resulting in the razor blade 1.1 as per Fig. 1 , formed by a center break 10 (designed break line 10.1) along the longitudinal cut-out 8, which is particularly economical in production.
  • the shaving width (shaving line 17/ Fig. 10 ) of the respective razor blade 1.1 (1.2, 1.3 in Fig. 5 and/or 6), it has a stamp 15 above the corresponding cutting edge length L1, L2, L3, for example showing "3 mm,” “6 mm,” or “10 mm” ( Figs. 4 to 6 ).
  • a beginning 11 and an end 12 of the cutting edge length L1, L2, L3 are rounded off slightly thus reducing the risk of injury to the skin.
  • Fig. 2 shows a handheld razor 6 with a razor blade 1.1 inserted into a receiver 4 as per Fig. 1 .
  • the replaceable razor blade 1.1, 1.2, 1.3 can be received by a, preferably commercially available, handheld razor 6.
  • Fig. 3 shows the handheld razor 6 as per Fig. 2 , but with the razor blade 1.1 fixed into position by a locking slider 18, and it is thus ready for use.
  • a precise shaving width can be targeted, which corresponds to the first cutting edge length L1 ( Fig. 4 ).
  • a second cutting edge 2.2 has a second cutting edge length L2
  • a precise shaving width can be targeted, which corresponds to the second cutting edge length L2 ( Fig. 5 ).
  • a precise shaving width can be targeted, which corresponds to the third cutting edge length L3 ( Fig. 6 ).
  • the razor blade 1.1, 1.2, 1.3 consists of a set S ( Figs. 4 to 6 ) of different razor blades 1.1, 1.2, 1.3, each having a first and a second and optionally at least a third cutting edge length L1, L2, L3.
  • the first cutting edge length L1 ( Fig. 4 ) is approximately 3 mm
  • the second cutting edge length L2 ( Fig. 5 ) is approximately 6 mm
  • the third cutting edge length L3 ( Fig. 6 ) is approximately 10 mm.
  • Fig. 7 shows a first, undivided standard blade 7 corresponding to DE1553829A ( Figs. 8 and 9 ).
  • Fig. 8 shows a second, undivided standard blade 7.1 corresponding to DE1553830A , wherein the razor blade 1.2.1 with a second cutting edge length L2 (for example 6 mm) manufactured from this standard blade 7.1 is shown in Fig. 9 .
  • L2 for example 6 mm
  • the razor blade 1.1, 1.2, 1.3 according to the invention is particularly suited for use with a commercially available handheld razor 5 for line-shaped shaving (shaving line 17) of zones of human hair (scalp hair) Z.
  • the insertion/removal of the razor blade 1.1, 1.2, 1.3 is just as easy with the handheld razor 5 as it is with a commercially available standard blade.
  • the fixed receiver 4 of the razor blade 1.1, 1.2, 1.3 in the handheld razor 5 has a stabilizing effect on the cutting edge 2.1, 2.2, 2.3 while shaving.
  • Fig. 10 shows a side view of a person P with the example of a shaving pattern 16 (for example a simulated tattoo 13) of a zone of scalp hair Z of human hair 14,
  • the shaving pattern 16 is formed by multiple shaving lines 17.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Scissors And Nippers (AREA)
  • Dry Shavers And Clippers (AREA)
  • Knives (AREA)

Abstract

A razor blade (1.1) with a cutting edge (2.1) on a longitudinal side (3) of the razor blade (1.1). The cutting edge (2.1) has a cutting length (L1) that is less than one half the length (L) of the longitudinal side (3). The cutting edge (2.1) is located on one side of the longitudinal side (3), wherein an area (5.1) of the cutting edge (2.1), which is cut out from the longitudinal side (3), is designed to be recessed relative and parallel to the cutting edge (2.1). This razor blade (1.1,1.2,1.3) can be used to target narrow shaving areas or shaving lines (for tattoos and the like) of human hair with a strong contour.

Description

  • The invention relates to a razor blade for line-shaped shaving of zones of human hair with a cutting edge on a longitudinal side of the razor blade and the use thereof.
  • This type of razor blade for a handheld razor is known, for example from DE1553829A (Figs. 8 and 9), DE1553830A or GB 456,568 . Typically, this razor blade is broken in half over its length and one half of the razor blade is connected to the handheld razor, wherein openings on the razor blade are used to fix it to a receiver of the handheld razor, This razor blade has a cutting edge along the entire longitudinal side. Because of the constraint from this long cutting edge, this razor blade cannot be used to target narrow shaving areas or shaving lines (for tattoos and the like) of human hair with a strong shaving area contour.
  • From US 3,897,629 a blade for a hair-cutting device is known. The blade having at least one longitudinal edge which comprises cutting portions and noncutting portions alternately spaced along the length of the said longitudinal edge, the blade having apertures therein to enable it to be adjustably secured to a hair-cutting device. The Hair-cutting device has a row of parallel teeth 24 which can be displaced with respect to the cutting edge of the blade. The cutting portions and noncutting portions lie alternately between adjacent teeth 24 of the row of teeth. When cutting device is passed through the hair of a user with a motion similar to a combing motion, the hair passing between two teeth associated with a cutting portion is shortened while the hair passing between two teeth associated with noncutting portion remains unshortened. Thus, every time the cutting device is passed through the scalp of a user, only a certain portion of the hair comes in contact with a cutting portion of the blade and thus only this portion of the hair is cut In the embodiment illustrated, only about one-half of the hair comes in contact with a cutting portion of the blade so that the effect of the device is a thinning out of the hair of the user. Because of the alternate cutting and noncutting portions, this blade is not suitable as a razor blade and cannot be used to target narrow shaving areas or shaving lines (for tattoos and the like) of human hair with a strong shaving area contour.
  • GB 2391190 A discloses a razor for shaving in addition to trimming/styling ones beard. The razor is characterised by a razor head having a centrally spaced gap portion in which also is disposed sunken blades. The gap provides the beard being trimmed within the area of the gap whereas the skin is shaved aside the gap. Because of the arrangement of two blades spaced to each in order to form the gap the razor can also not be used to get narrow shaving areas or shaving lines.
  • Thus, the object of the invention is to obtain a generically equivalent razor blade, which does not have the aforementioned disadvantage, enables simple handling, and can be produced economically. In addition, it should be possible to use the razor blade with a commercially available handheld razor.
  • This object is achieved in accordance with the characterizing features of Claim 1 or 12. Additional progressions of the invention as recited in Claim 1 result from Sub-claims 2 through 11.
  • The invention is explained in more detail by means of embodiment examples. The following is shown:
    • Fig. 1:
    shows an enlarged top view of a first razor blade;
    Fig. 2:
    shows a top view of a handheld razor with the razor blade inserted into a receiver as per Fig, 1;
    Fig 3:
    shows the handheld razor as per Fig. 2, but with the razor blade fixed into position;
    Figs. 4-6:
    show a top view of a set of various razor blades with a first, second, and third cutting edge length;
    Fig. 7
    shows a top view of a first, undivided standard blade;
    Fig. 8
    shows a top view of a second, undivided standard blade;
    Fig. 9
    shows the top view of the razor blade as per Fig. 8, but with a shortened cutting edge length; and
    Fig. 10
    shows a side view of a person with an example of a shaving pattern for scalp hair.
  • Fig. 1 shows a first razor blade 1.1 with a cutting edge 2.1 on a longitudinal side 3 of the razor blade 1.1. The cutting edge 2.1 has a cutting length L1 that is less than one half the length L of the longitudinal side 3. The cutting edge 2.1 is located on one side of the longitudinal side 3, wherein an area 5.1 of the cutting edge 2.1, which is cut out from the longitudinal side 3, is designed to be recessed relative and parallel to the cutting edge 2.1.
  • The cut-out area 5.1 (5.2, 5.3/Fig. 5/6) is formed by punch-out, grind-out, or erosion (for example before or after production or sharpening of the cutting edge 2.1).
  • The razor blade 1.1 shown in Fig. 1 is formed from a standard blade 7 divided up along the length, which is shown as an undivided standard blade 7 in Fig. 7 and is supplied as such. This standard blade 7 for a handheld razor 6 is known, for example, from DE1553829A (Figs. 8 and 9). The undivided razor blade 1.1 as per Fig. 4 has two opposing cutting edges 2.1, a center longitudinal cut-out 8, and fixation openings 9, resulting in the razor blade 1.1 as per Fig. 1, formed by a center break 10 (designed break line 10.1) along the longitudinal cut-out 8, which is particularly economical in production.
  • To provide information regarding the shaving width (shaving line 17/Fig. 10) of the respective razor blade 1.1 (1.2, 1.3 in Fig. 5 and/or 6), it has a stamp 15 above the corresponding cutting edge length L1, L2, L3, for example showing "3 mm," "6 mm," or "10 mm" (Figs. 4 to 6).
  • A beginning 11 and an end 12 of the cutting edge length L1, L2, L3 are rounded off slightly thus reducing the risk of injury to the skin.
  • Fig. 2 shows a handheld razor 6 with a razor blade 1.1 inserted into a receiver 4 as per Fig. 1. The replaceable razor blade 1.1, 1.2, 1.3 can be received by a, preferably commercially available, handheld razor 6.
  • Fig. 3 shows the handheld razor 6 as per Fig. 2, but with the razor blade 1.1 fixed into position by a locking slider 18, and it is thus ready for use.
  • Because a first cutting edge 2,1 has a first cutting edge length L1, a precise shaving width can be targeted, which corresponds to the first cutting edge length L1 (Fig. 4).
  • Because a second cutting edge 2.2 has a second cutting edge length L2, a precise shaving width can be targeted, which corresponds to the second cutting edge length L2 (Fig. 5).
  • Because a third cutting edge 2.3 has a third cutting edge length L3, a precise shaving width can be targeted, which corresponds to the third cutting edge length L3 (Fig. 6).
  • The razor blade 1.1, 1.2, 1.3 consists of a set S (Figs. 4 to 6) of different razor blades 1.1, 1.2, 1.3, each having a first and a second and optionally at least a third cutting edge length L1, L2, L3. The first cutting edge length L1 (Fig. 4) is approximately 3 mm, the second cutting edge length L2 (Fig. 5) is approximately 6 mm, and the third cutting edge length L3 (Fig. 6) is approximately 10 mm. By replacing the selected razor blade 1.1, 1.2, 1.3, the user can easily and comfortably achieve different shaving widths or shaving lines 17 (for tattoos 13/Fig. 10 and the like) of human hair 14 with a strong shaving area contour.
  • Fig. 7 shows a first, undivided standard blade 7 corresponding to DE1553829A (Figs. 8 and 9).
  • Fig. 8 shows a second, undivided standard blade 7.1 corresponding to DE1553830A , wherein the razor blade 1.2.1 with a second cutting edge length L2 (for example 6 mm) manufactured from this standard blade 7.1 is shown in Fig. 9.
  • The razor blade 1.1, 1.2, 1.3 according to the invention is particularly suited for use with a commercially available handheld razor 5 for line-shaped shaving (shaving line 17) of zones of human hair (scalp hair) Z. In addition, the insertion/removal of the razor blade 1.1, 1.2, 1.3 is just as easy with the handheld razor 5 as it is with a commercially available standard blade. The fixed receiver 4 of the razor blade 1.1, 1.2, 1.3 in the handheld razor 5 has a stabilizing effect on the cutting edge 2.1, 2.2, 2.3 while shaving.
  • Fig. 10 shows a side view of a person P with the example of a shaving pattern 16 (for example a simulated tattoo 13) of a zone of scalp hair Z of human hair 14, The shaving pattern 16 is formed by multiple shaving lines 17.
    • Reference list:
    • 1.1-1.3
    Razor blade
    1.2.1
    Razor blade
    2.1-2.3
    Cutting edge
    3
    Longitudinal side
    4
    Receiver
    5.1-5.3
    Area
    6
    Handheld razor
    7, 7.1
    Standard blade
    8
    Longitudinal cut-out
    9
    Fixation openings
    10
    Break
    10.1
    Designed break line
    11
    Start/cutting edge length L1-L3
    12
    End/cutting edge length L1-L3
    13
    Tattoo
    14
    Human hair
    15
    Stamp
    16
    Shaving pattern
    17
    Shaving line
    18
    Locking slider
    L
    Length/longitudinal side 3,
    L1
    First cutting edge length
    L2
    Second cutting edge length
    L3
    Third cutting edge length
    P
    Person
    S
    Set
    Z
    Zone of scalp hair

Claims (12)

  1. A razor blade (1.1, 1.2, 1.3) for line-shaped shaving of zones of human hair (Z) with a cutting edge (2.1, 2.2, 2.3) on a longitudinal side (3) of the razor blade (1.1, 1.2, 1.3), characterized in that a cut-out area (5.1, 5.2, 5.3) of the longitudinal side (3) is designed to be recessed relative to the cutting edge (2.1, 2.2, 2.3) to form a single cutting edge (2.1, 2.2, 2.3) on the longitudinal side (3) with a cutting edge length (L1, L2, L3) that is less than half of the length (L) of the longitudinal side (3) to get a precise shaving width, which corresponds to the cutting edge length (L1, L2, L3) and that the cutting edge (2.1, 2.2, 2.3) is arranged on one side of the longitudinal side (3).
  2. The razor blade according to Claim 1, wherein the cut-out area (5.1, 5.2, 5.3) of the longitudinal side (3) is designed to be recessed parallel and relative to the cutting edge (2.1, 2.2, 2.3).
  3. The razor blade according to Claim 1, wherein the cut-out area (5.1, 5.2, 5.3) is formed by punch-out, grind-out, or erosion.
  4. The razor blade according to Claim 1, wherein the cutting edge (2.1) has a second cutting edge length (L1) of approximately 3 mm.
  5. The razor blade according to Claim 1, wherein the cutting edge (2.2) has a second cutting edge length (L2) of approximately 6 mm.
  6. The razor blade according to Claim 1, wherein the cutting edge (2.3) has a third cutting edge length (L3) of approximately 10 mm.
  7. Set (S) of different razor blades (1.1, 1.2, 1.3) according to Claim 1, comprising a first razor blade (1.1) having a first cutting edge length (L1), and a second razor blade (1.2) having a second cutting edge length (L2) and optionally at least a third razor blade (1.3) having a third cutting edge length (L3).
  8. The set (S) of different razor blades according to Claim 7, wherein the first cutting edge length (L1) is approximately 3 mm, the second cutting edge length (L2) is approximately 6 mm, and the third cutting edge length (L3) is approximately 10 mm.
  9. Handheld razor (6) with the razor blade according to Claim 1, wherein the replaceable razor blade (1.1, 1.2, 1.3) is inserted into a receiver (4).
  10. The razor blade according to Claim 1, wherein the razor blade (1.1, 1.2, 1.3) is formed by a standard blade (7, 7.1), with two opposing cutting edges (2.1, 2.2, 2.3) and at least one center longitudinal cut-out (8) and multiple fixation openings (9), by a center break (10) along the longitudinal cut-out (8).
  11. The razor blade according to Claim 1, wherein the razor blade (1.1, 1,2, 1.3) has a stamp (15) above the cutting edge length (L1, L2, L3).
  12. Use of the razor blade according to at least one of Claims 1 to 10 for line-shaped shaving of zones of scalp hair (Z).
EP06013580A 2006-06-30 2006-06-30 Razor blade and the use thereof Not-in-force EP1724074B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE602006015564T DE602006015564D1 (en) 2006-06-30 2006-06-30 Razor blade and use of same
EP06013580A EP1724074B1 (en) 2006-06-30 2006-06-30 Razor blade and the use thereof
AT06013580T ATE474697T1 (en) 2006-06-30 2006-06-30 RAZOR BLADE AND USE THEREOF
DE200620014663 DE202006014663U1 (en) 2006-06-30 2006-06-30 Razor blade for shaving has cutter of length less than half that of long side and fitted to long side on one side

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06013580A EP1724074B1 (en) 2006-06-30 2006-06-30 Razor blade and the use thereof

Publications (3)

Publication Number Publication Date
EP1724074A2 EP1724074A2 (en) 2006-11-22
EP1724074A3 EP1724074A3 (en) 2007-01-24
EP1724074B1 true EP1724074B1 (en) 2010-07-21

Family

ID=37056843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06013580A Not-in-force EP1724074B1 (en) 2006-06-30 2006-06-30 Razor blade and the use thereof

Country Status (3)

Country Link
EP (1) EP1724074B1 (en)
AT (1) ATE474697T1 (en)
DE (1) DE602006015564D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008017308U1 (en) 2008-03-18 2009-04-30 Wahl Gmbh Razor blade for a razor
US9327415B1 (en) * 2014-01-10 2016-05-03 Tadhe Hovsepian Interchangeable head size precision razor device
US20230234252A1 (en) * 2022-01-26 2023-07-27 Jeremy Hernandez Shaving Blade Device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB360860A (en) * 1930-08-11 1931-11-11 Douglas James Webberley Improvements in or relating to razors and like devices
GB456568A (en) * 1936-05-26 1936-11-11 Mueller Paul Improvements relating to razor blades
FR1293601A (en) * 1961-04-05 1962-05-18 Hair straightening razor
DE2329708C3 (en) * 1973-06-12 1980-10-09 Christa 4300 Essen Liedtke Geb. Arnold Blade for a hair clipper
US4947710A (en) * 1988-03-02 1990-08-14 W. Ralph Bean Hair sculpturing razor
US20040035003A1 (en) * 2000-11-01 2004-02-26 Stiles Sharidan Lorraine Personal shaving razor
GB2391190B (en) * 2002-07-25 2005-11-16 Marc James Tully Designer blades: Marc 1,2+3 followed by the Max 1,2+3

Also Published As

Publication number Publication date
ATE474697T1 (en) 2010-08-15
EP1724074A2 (en) 2006-11-22
DE602006015564D1 (en) 2010-09-02
EP1724074A3 (en) 2007-01-24

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