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 PDFInfo
- 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
- Authority
- US
- United States
- Prior art keywords
- sheet metal
- blade
- lower blade
- cuts
- cutter head
- 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
Links
Images
Classifications
-
- 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.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Dry Shavers And Clippers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT181527T | 1953-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2833033A true US2833033A (en) | 1958-05-06 |
Family
ID=3661315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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)
Country | Link |
---|---|
US (1) | US2833033A (de) |
AT (1) | AT181527B (de) |
CH (1) | CH326268A (de) |
DE (1) | DE1004519B (de) |
Cited By (14)
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 |
EP0080303A2 (de) * | 1981-11-23 | 1983-06-01 | 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)
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT171778B (de) * | 1951-01-18 | 1952-07-10 | Elektromechanik Salzburg Ges M | Scherkopf für Trockenrasierapparate |
-
1953
- 1953-12-17 AT AT181527D patent/AT181527B/de active
-
1954
- 1954-09-24 CH CH326268D patent/CH326268A/de unknown
- 1954-09-30 DE DEH21662A patent/DE1004519B/de active Pending
- 1954-11-30 US US472088A patent/US2833033A/en not_active Expired - Lifetime
Patent Citations (3)
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 (24)
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 |
EP0080303A2 (de) * | 1981-11-23 | 1983-06-01 | The Gillette Company | Untermesser für Trockenrasierer mit Blattförmigem Obermesser |
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 |
EP1426148A1 (de) * | 2001-09-10 | 2004-06-09 | Matsushita Electric Works, Ltd. | Verfahren zur herstellung einer innenklinge für einen elektrischen rasierapparat |
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2833033A (en) | Sheet metal lower blade for the cutter head of dry shaving apparatus | |
US3945289A (en) | Saw tooth | |
US3241172A (en) | Brush construction | |
US2877548A (en) | Dry shaver shear plate and cutter construction | |
US3178818A (en) | Inner cutter for a dry shaver fixed to blade carrier by collars and an undetachable coating | |
US3092904A (en) | Movable cutter for a dry shaver having saw tooth design cutting edge | |
US1864995A (en) | Razor | |
US2331274A (en) | Dry shaver | |
US2168406A (en) | Method of making cutting blades | |
US2317177A (en) | Dry shaver | |
US3125808A (en) | Head construction for a dry shaver | |
US2249825A (en) | Hair clipper | |
US3986421A (en) | Saw blade having inverse half-conical varying radius raking surface | |
US3436822A (en) | Cutter head for dry shaver having additional cutting means | |
GB1440141A (en) | Blades | |
US4575941A (en) | Dry shavers | |
US4934056A (en) | Sawblades for a power saw with reciprocating blades | |
US2982020A (en) | Electric dry shaver with grill tensioning means | |
US2337623A (en) | Electric dry shaver | |
US2386572A (en) | Metalworking machine | |
US3130609A (en) | Method for making a dry shaver blade | |
US7900360B2 (en) | Cutter assembly and method of producing same | |
US2578974A (en) | Electric razor | |
US2242180A (en) | Process of making combs for shaving implements | |
DE1129085B (de) | Scherkopf fuer Trockenrasiergeraet |