US2833033A - Sheet metal lower blade for the cutter head of dry shaving apparatus - Google Patents

Sheet metal lower blade for the cutter head of dry shaving apparatus Download PDF

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Publication number
US2833033A
US2833033A US472088A US47208854A US2833033A US 2833033 A US2833033 A US 2833033A US 472088 A US472088 A US 472088A US 47208854 A US47208854 A US 47208854A US 2833033 A US2833033 A US 2833033A
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United States
Prior art keywords
sheet metal
blade
lower blade
cuts
cutter head
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Expired - Lifetime
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US472088A
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English (en)
Inventor
Heyek Gerhard
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Individual
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Individual
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Publication of US2833033A publication Critical patent/US2833033A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/044—Manufacture and assembly of cutter blocks

Definitions

  • the invention relates to a lower blade for the cutter head of dry shaving apparatus in which the lower blade has a convex cylindrical cutting surface and is reciprocated on the concave inside of a shear plate or upper blade which is also cylindrically curved and formed with apertures for penetration by the hair.
  • dry shaving apparatus of that type the movement of the lower blade is effected with a high periodicity, e. g.
  • the drive mechanism which imparts the reciprocating motion to the blade and which in most cases comprises an eccentric or crank drive; is stressed and worn to a minor degree and for this reason can be made in a weaker design so that the entire apparatus can be manufactured at lower cost and yet have greater durability.
  • a lower blade for a cutter head of dry shaving apparatus comprising drive means for reciprocating said lower blade, which blade comprises a sheet metal blade body having a convex cylindrical outside surface formed with a plurality of cuts extending transversely of the generatrix of said surface and with an outwardly bent sheet metal flange portion at least on one side of each of said cuts, each of said outwardly bent flange portions having a free longitudinal edge, said free edges being ground according to a common cylindrical surface to form cutting edges.
  • the invention further provides a lower blade for a cutter head of dry shaving apparatus comprising drive means for reciprocating said lower blade, which blade comprises a sheet metal blade body having a convex cylindrical outside surface formedflwith a plurality of cutting edges extending in a common cylindrical surface transversely of the generatrix of said outside cylindrical surface of the blade body, and two longitudinal margins having connected thereto a platedisposed on the inside of said blade body and provided with means engageable by said drive means for reciprocating said blade.
  • lower blades of that type can 'be rnanufactured in a particularly simple manner and are very light in weight so that vibration and wear are avoided to a high degree inlthe use of the dry shaving apparatus.
  • .thelands. remaining between the cuts are of angle or channel section.
  • inwardly bent sheet metal flange portions may be provided on one side and outwardly bent sheet metal'fiange portions may be provided on the other side of the cuts; in that case said lands are of Z-shaped section. All these land sec-' tions provide for a high rigidity of the lower blade.
  • Fig. 1 is a perspective view of a lower blade according to the invention.
  • Figs. 2 and 3 respectively are a transverse section view taken on line IIII and a longitudinal sectional view taken on line III-III in Fig. 1.
  • Figs. 4 and 5 are longitudinal sectional views similar to Fig. 3 and showing modified embodiments of the invention.
  • Fig. 6 is a transverse sectional view similar to Fig. 2 and showing an additional embodiment of the invention. 7
  • the lower blade B shown in Fig. 1 comprises a body 1 of sheet steel, preferably sheet special steel, which is cylindrically curved to have substantially the form of an oblong segment of the periphery of a cylinder. Closely spaced cuts 2 extending transversely of the generatrix of said cylinder are formed in that body. In the embodiment shown, sheet metal flange portions 3 are bent outwardly on both sides of each of said cuts.
  • the cuts 2 and sheet metal flanges 3 are formed suitably in a single stamping operation, in which the body ll is cut open in its peripheral direction at the center of the slots 2 and the two sheet metal edges adjoining the out are bent outwardly at right angles to the convex side of the body 1 to form the flanges 3.
  • the free outer longitudinal edge surfaces of the sheet metal flanges 3, having a rough profile 4 after the cutting and stamping operations, are surface ground as shown in Fig. 2 along a common cylindrical surface 5. This ensures a snug engagement of the lower blade on the shear plate and on the other hand leads to the formation of sharp cutting edges 6 on both sides of each flange 3. Only little grinding work is required because the grinding operation is restricted to the relatively narrow edge surfaces 4 of the lands. Thus the lower blade described can be manufactured at low cost.
  • Fig. 5 represents another embodiment, in which sheet metal portions 3 are bent outwardly on one side, of the cuts and sheet metal portions 7 arebent inwardly on the other side.
  • the lands between the cuts'2 have a z-shaped profile.
  • That embodiment has the same advantage as that shown in Fig. 4 but'provides for a higher rigidity of the blade owing to the inwardlydirected is fixed with its flanges to the longitudinal margins of the blade body 1 by spotwelding, riveting or the like and which. carries the-mean's for. engagement by the drive" mechanism for the lower blade,
  • that plate 3 may have a central transverse slot 12 which receives 0 an eccentric rotary pin 13, as indicated in Fig. 6.
  • the cylindrically curved blade body may have the cross-sectional shape of an arc of a circle, of a parabola, a caternary, or the like.
  • the end portions 11 of the cylindrical blade body serve only for holding it during the bending and stamping operations. As is shown on the right in Figs. 3-5 they are cut off at a later stage of the manufacture of the blade so that the entire length of the blade is available for shaving.
  • a cutter head of dry shaving apparatus comprising a lower blade, drive means for reciprocating said lower blade, which blade comprises a sheet metal blade body having a convex cylindrical outside surface formed with a plurality of spaced cuts extending transversely of the generatrix of said surface and leaving land portions within said surface between said cuts, and a sheet metal flange portion projecting substantially perpendicularly to and outwardly from said surface at least on one side of each of said land portions, each of said outwardly projecting flange portions having a free longitudinal edge of substantially rectangular cross-section, said free edges lying in a common imaginary cylindrical surface to form cutting edges.
  • a cutter head of dry'shaving apparatus comprising a lower blade, drive means for reciprocating said lower blade, which blade comprises a sheet metal blade body having a convex cylindrical outside surface formed with a plurality of spaced cuts extending transversely of the generatrix of said surface and leaving land portions within said surface between said cuts, and a sheet metal flange portion projecting substantially perpendicularly to and outwardly from said surface on both sides of each of said land portions to form channel-section lands between said cuts, each of said outwardly projecting flange portions having a free longitudinal edge of substantially rectangular cross-section, said free edges lying in a common imaginary cylindrical surface to form cutting edges.
  • a cutter head of dry shaving apparatus comprising a lower blade, drive means for reciprocating said lower blade, which blade comprises a sheet metal blade body having'a convex cylindrical outside surface formed with a plurality of spaced cuts extending transversely of the generatrix of said surface and leaving land portions within said surface between said cuts, and a sheet metal flange portion projecting substantially perpendicularly to and outwardly from said surface only on one side of each of said land portions to form angle-section lands between said cuts, each of said outwardly projecting flange portions having a free longitudinal edge of substantially rectangular cross-section, said free edges lying in a common imaginary cylindrical surface to form cutting edges.
  • a cutter head of dry shaving apparatus comprising a lower blade, drive means for reciprocating said lower blade, which blade comprises a sheet metal blade body having a convex cylindrical outside surface formed with a plurality of spaced cuts extending transversely of the generatrix of said surface and leaving land portions within said surfacebetween said cuts, and a sheet metal flange portion projecting substantially perpendicularly to and outwardly from said surface on one side and with a sheet metal flange portion projecting inwardly from said surface on the other side of each of said land portions to form lands of Z-shaped section between said cuts, each of said outwardly projecting flange portions having a free longitudinal edge of substantially rectangular cross-section, said free edges lying in a common imaginary cylindrical surface to form cutting'edges.
  • a cutter head of dry shaving apparatus comprising a lower blade, drive means for reciprocating said lower blade, which blade comprises a sheet metal blade body having a convex cylindrical outside surface formed with a plurality of spaced cuts extending transversely of the generatrix of said surface and leaving land portions within said surface between said cuts, and a sheet metal flange portion projecting substantially perpendicularly to and outwardly from said surface at least on one side of each of said land portions, each of said outwardly projecting flange portions having a free longitudinal edge of substantially rectangular cross-section, said free edges lying in a common imaginary cylindrical surface to form cutting edges, said blade body being further formed with two distinct longitudinal corners outwardly of said cuts, and with mutually substantially parallel holding flanges adjoining said corners.
  • a cutter head of dry shaving apparatus comprising a lower blade, drive means for reciprocating said lower blade, which blade comprises a sheet metal blade body having a convex cylindrical outside surface formed with a plurality of cutting edges extending in a common cylindrical surface transversely of the generatrix of the out side cylindrical surface of the blade body, said blade body being further formed with two distinct longitudinal corners outwardly of said cutting edges and with mutually substantially parallel holding flanges adjoining said corners, said blade further comprising a plate disposed on the inside of said blade body and provided with means engageable by said drive means for reciprocating said blade body, said plate being formed with two longitudinal flanges connected to the holding flanges of the blade body and engaging said corners.
  • a lower blade for a cutter head of dry shaving apparatus comprising a sheet metal blade body having a convex cylindrical outside surface formed with a plurality of relatively spaced cuts extending transversely of the generatrix of said surface and leaving laud portions within said surface between said cuts, a sheet metal flange portionhaving parallel plane faces projecting substantially perpendicularly to and outwardly from said surface in a plane radial to said generatrix on one side of said land portion, each of said flange portions having a free longitudinal edge disposed normally to each of the plane faces of the sheet metal from which it is formed, said free edges lying on a common imaginary cylindrical surface.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US472088A 1953-12-17 1954-11-30 Sheet metal lower blade for the cutter head of dry shaving apparatus Expired - Lifetime US2833033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT181527T 1953-12-17

Publications (1)

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US2833033A true US2833033A (en) 1958-05-06

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US472088A Expired - Lifetime US2833033A (en) 1953-12-17 1954-11-30 Sheet metal lower blade for the cutter head of dry shaving apparatus

Country Status (4)

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US (1) US2833033A (de)
AT (1) AT181527B (de)
CH (1) CH326268A (de)
DE (1) DE1004519B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3060569A (en) * 1958-10-23 1962-10-30 Oliver Peil Control Ltd Cutter blade assembly for a motor driven dry shaver
US3092904A (en) * 1960-05-09 1963-06-11 Bruecker John Movable cutter for a dry shaver having saw tooth design cutting edge
US3125808A (en) * 1959-05-19 1964-03-24 Head construction for a dry shaver
US3196539A (en) * 1961-05-12 1965-07-27 Sunbeam Corp Electric dry shaver
US3436822A (en) * 1966-04-06 1969-04-08 Gerhard Heyek Cutter head for dry shaver having additional cutting means
US3552329A (en) * 1969-12-10 1971-01-05 Tridair Industries Panel construction and method
US3945118A (en) * 1973-11-08 1976-03-23 Sperry Rand Corporation Shaver inner cutter
EP0080303A3 (de) * 1981-11-23 1984-06-27 The Gillette Company Untermesser für Trockenrasierer mit Blattförmigem Obermesser
US4536956A (en) * 1982-02-12 1985-08-27 U.S. Philips Corporation Reciprocatingly drivable cutter for a dry-shaving apparatus
US20040006863A1 (en) * 2001-09-10 2004-01-15 Ryuji Otani Method of manufacturing inner blade for electric razor
US20050183267A1 (en) * 2004-02-19 2005-08-25 Izumi Products Company Electric shaver
EP1568450A1 (de) * 2004-02-27 2005-08-31 Izumi Products Company Elektrischer Vibrationsrasierapparat, Innenmesser und Herstellungsmethode eines Innenmessers
US20080047146A1 (en) * 2005-03-05 2008-02-28 Wolfgang Longerich Shaving System
CN106393189A (zh) * 2016-12-01 2017-02-15 王保华 一种剃须刀刀头结构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900719A (en) * 1956-08-24 1959-08-25 Supreme Products Corp Cutters for electric shavers
US2935788A (en) * 1957-05-07 1960-05-10 Jacob L Kleinman Electrically operated dry shaving implements
US3858461A (en) * 1973-11-08 1975-01-07 Sperry Rand Corp Shaver inner cutter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2168406A (en) * 1937-07-31 1939-08-08 Artie B Harris Method of making cutting blades
US2281841A (en) * 1938-07-16 1942-05-05 Fred E Sudlow Razor
US2445790A (en) * 1944-10-27 1948-07-27 Lonne Ingvar Mechanically operated razor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT171778B (de) * 1951-01-18 1952-07-10 Elektromechanik Salzburg Ges M Scherkopf für Trockenrasierapparate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2168406A (en) * 1937-07-31 1939-08-08 Artie B Harris Method of making cutting blades
US2281841A (en) * 1938-07-16 1942-05-05 Fred E Sudlow Razor
US2445790A (en) * 1944-10-27 1948-07-27 Lonne Ingvar Mechanically operated razor

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3060569A (en) * 1958-10-23 1962-10-30 Oliver Peil Control Ltd Cutter blade assembly for a motor driven dry shaver
US3125808A (en) * 1959-05-19 1964-03-24 Head construction for a dry shaver
US3092904A (en) * 1960-05-09 1963-06-11 Bruecker John Movable cutter for a dry shaver having saw tooth design cutting edge
US3196539A (en) * 1961-05-12 1965-07-27 Sunbeam Corp Electric dry shaver
US3436822A (en) * 1966-04-06 1969-04-08 Gerhard Heyek Cutter head for dry shaver having additional cutting means
US3552329A (en) * 1969-12-10 1971-01-05 Tridair Industries Panel construction and method
US3945118A (en) * 1973-11-08 1976-03-23 Sperry Rand Corporation Shaver inner cutter
EP0080303A3 (de) * 1981-11-23 1984-06-27 The Gillette Company Untermesser für Trockenrasierer mit Blattförmigem Obermesser
US4575941A (en) * 1981-11-23 1986-03-18 The Gillette Company Dry shavers
US4536956A (en) * 1982-02-12 1985-08-27 U.S. Philips Corporation Reciprocatingly drivable cutter for a dry-shaving apparatus
US20040006863A1 (en) * 2001-09-10 2004-01-15 Ryuji Otani Method of manufacturing inner blade for electric razor
EP1426148A4 (de) * 2001-09-10 2004-12-01 Matsushita Electric Works Ltd Verfahren zur herstellung einer innenklinge für einen elektrischen rasierapparat
US7022195B2 (en) 2001-09-10 2006-04-04 Matsushita Electric Works, Ltd. Method of manufacturing inner blade for electric razor
US20050183267A1 (en) * 2004-02-19 2005-08-25 Izumi Products Company Electric shaver
CN100364732C (zh) * 2004-02-19 2008-01-30 株式会社泉精器制作所 电动剃须刀
EP1568450A1 (de) * 2004-02-27 2005-08-31 Izumi Products Company Elektrischer Vibrationsrasierapparat, Innenmesser und Herstellungsmethode eines Innenmessers
US20050188546A1 (en) * 2004-02-27 2005-09-01 Izumi Products Company Reciprocating electric shaver, inner cutter and inner cutter manufacturing method
CN100371146C (zh) * 2004-02-27 2008-02-27 株式会社泉精器制作所 往复式电动剃须刀及其内刀
US20080047146A1 (en) * 2005-03-05 2008-02-28 Wolfgang Longerich Shaving System
US7895753B2 (en) * 2005-03-05 2011-03-01 Braun Gmbh Shaving system
CN106393189A (zh) * 2016-12-01 2017-02-15 王保华 一种剃须刀刀头结构
CN106393189B (zh) * 2016-12-01 2019-07-23 王保华 一种剃须刀刀头结构

Also Published As

Publication number Publication date
CH326268A (de) 1957-12-15
AT181527B (de) 1955-03-25
DE1004519B (de) 1957-03-14

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