US3597844A - Movable cutter for shaving apparatus - Google Patents

Movable cutter for shaving apparatus Download PDF

Info

Publication number
US3597844A
US3597844A US819050A US3597844DA US3597844A US 3597844 A US3597844 A US 3597844A US 819050 A US819050 A US 819050A US 3597844D A US3597844D A US 3597844DA US 3597844 A US3597844 A US 3597844A
Authority
US
United States
Prior art keywords
blades
granulae
combination
cutter
cutting edges
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
US819050A
Other languages
English (en)
Inventor
Werner Messinger
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.)
Braun GmbH
Original Assignee
Braun 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 Braun GmbH filed Critical Braun GmbH
Application granted granted Critical
Publication of US3597844A publication Critical patent/US3597844A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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 reciprocable cutter of a dry shaver has substantially semicircular blades whose convex outer surfaces are adjacent to the inner side of the comb foil and whose side surfaces are provided with strips of diamond dust, sapphire dust or other finely comminuted granular material having a hardness which is considerably higher than the hardness-of the ferrous or synthetic plastic material of the blades.
  • the width of such strips is in the range of 1 millimeter and the granulae impart to the adjoining cutting edges ofthe blades an irregular (substantially undulate) shape to insure more reliable engagement between the cutting edges and the whiskers or hairs which penetrate through the apertures of the foil into the range of reciprocating blades.
  • the outer surfaces of the blades are polished to a high degree of smoothness subsequent to application of granulae.
  • the present invention relates to improvements in shaving apparatus of the type commonly known as'dry shavers. More particularly, the invention'relates to improvements in cutters for use in such shaving apparatus. Still more particularly, the invention'relates to improvements in movable cutters serving to cooperate with the comb foils of dry shavers to: sever' whiskers or hairs which penetrate through the apertures of the v foil.
  • the blades of movable cutters for use in dry shavers consist of hardened steel. Such blades are ground and polished to provide them with suitable cutting edges which sever whiskers or hairs while the movable cutter' reciprocates along the inner side of the apertured comb foil.
  • a drawback of presently known movable cutters fordry shavers is'that the' cutting edges of their'blades become worn asa result of repeated frictional engagement with the inner side of the foil.
  • the outer surfaces of the blades are preferably polished to a high degree of smoothness subsequent to application of granulate to the adjoining side surface or surfaces.
  • FIG. I is a transverse sectional view of a movable cutter 1 which embodies the invention
  • FIG; 2 is a fragmentary longitudinal sectional view of the -II-II or FIG. I;
  • An object of the present invention is toprovide a shavingv apparatus with a novel arrangement of cutters, particularly to" provide the shaving apparatus with amovable cutter which can stand longer periods of use than presently known movable cutters and whose whisker-engaging or hair-engaging and severing action is superior to that of conventional movable cutters.
  • Another object of. the invention is to provide a movable cutter which can be utilized in presentlyknown dry shavers.
  • a further object of the invention is to provide a movable cutter which can be used in conjunction with'conventional comb foils.
  • An additional object of the'invention is to provide a novel method of treating the blades of movable cutters for'use in dry shavers.
  • Still another object of the invention is to provide a movable cutter with novel cutting edges.
  • FIG: 3 is a fragmentary plan view of the comb foil in a shaving head, further showing one cutting blade of the movable cutter.
  • FIGS .3! and2 illustrate a portion of a movable cutter MC which comprises a frame or carriage 2 and a plurality of thin parallel blades! which areinserted into and rigidly connected withthe'frame 2 and are located in planes extending at right angles to thedirection 'of reciprocatory movement of the cutter MCwith reference to'a stationary cutter 8 shown in FIG. 3.
  • This'stationary cutter is a comb foil having a plurality of preferably circular apertures 7 (only one shown). The outer sideof'the foil 8 is guided along the face of the user and its concave innerside 4 (indicated in FIG.
  • each blade has two side surfaces lb, Iv which flank the corresponding outer surface la and define therewith actlytransversely of the direction of movement.
  • Each blade has a preferably convex outer surface which is adjacent to the inner side, of the first cutter and several (preferably two) side surfaces which flank the outer'surface and define therewith cutting edges.
  • sapphire dust or a substance of equivalent hardness which are applied to the side surfaces lb, IL' in the region of the cutting edges Id, 1e.
  • the granulae which form the strips 3 are preferably glued to the corresponding side surfaces lb, 11-; however, any'other suitable method of application can be resorted to as long as the granulae adhere to the blades 1 with a requisite force.
  • the granulae impart to the adjoining cutting rnation of sharply defined cutting edges which are of irregular (substantiallyu'ndulate)'shape, as shown at 5 in FIG. 3.
  • This illustration further shows a pair of whiskers or hairs 6 which extend inwardly throughthe aperture 7 of the foil 8 and into the range of blades I which reciprocate up and down, as viewed in FIG. 3.
  • the whiskers'fi are severed along the edges of the surface surrounding the aperture 7 when the blade 1 shown in FIGS moves up and down.
  • the irregular shape 5 of the cutting edges lo, Id insures thatthc whiskers cannot slide along the cutting edges while the blades I perform their reciprocatory movements with reference to the foil 8. Consequently, the whiskers 6 are severed as soon as they reach the adjoining portions of the cutting edges around the aperture 7.
  • the strips 3 not only prolong the useful life of blades I but also insure more satisfactory engagement between whiskers 6 and the cutting edges 1d, le. This is in contrast to the action of conventional movable cutters wherein the side surfaces of the blades are provided with smooth coats of hardened steel or titanium alloy
  • Another important advantage of my cutter MC is that its blades 1 can be produced of a relatively soft metallic or synthetic plastic material. This is due to the fact that actual cutting edges are formed by the strips 3 (as at 5) so that the material ofthe blades 1 undergoes very little wear.
  • a combination comprising a first cutter having an outer side and an inner side; and a second cutter movable in a predetermined direction with reference to said direction, said side surfaces being provided with granulae of a material whose hardness substantially exceeds the hardness of the material of said blade means, said granulae projecting from said side surfaces so as to impart to the adjoining cutting edge an irregular shape to insure a more reliable engagement between the cutting edges and the whiskers or hairs -to be cut by the shaving apparatus.
  • said blade means includes a plurality of blades having a substantially semicircular outline.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US819050A 1968-05-02 1969-04-24 Movable cutter for shaving apparatus Expired - Lifetime US3597844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681703330 DE1703330A1 (de) 1968-05-02 1968-05-02 Schneidteile fuer Trockenrasierer

Publications (1)

Publication Number Publication Date
US3597844A true US3597844A (en) 1971-08-10

Family

ID=5688380

Family Applications (1)

Application Number Title Priority Date Filing Date
US819050A Expired - Lifetime US3597844A (en) 1968-05-02 1969-04-24 Movable cutter for shaving apparatus

Country Status (8)

Country Link
US (1) US3597844A (fr)
AT (1) AT297528B (fr)
CH (1) CH493311A (fr)
DE (1) DE1703330A1 (fr)
FR (1) FR2007677A1 (fr)
GB (1) GB1257988A (fr)
NL (1) NL6906481A (fr)
SE (1) SE343007B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044427A (en) * 1976-05-21 1977-08-30 Rogers Corporation Comber roll
US4858324A (en) * 1984-01-11 1989-08-22 Edge Engineering, Inc. Knife blades and method of making said knife blades
US20050274020A1 (en) * 2004-06-04 2005-12-15 Rovcal, Inc. Cutting blade and cutting blade assembly for electric shaver

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2108797A (en) * 1935-06-22 1938-02-22 Gregory J Comstock Method of producing hard cemented carbide composites
US2900719A (en) * 1956-08-24 1959-08-25 Supreme Products Corp Cutters for electric shavers
US3064349A (en) * 1959-03-28 1962-11-20 Braun Ag Shaving head for dry shavers having a coated cutting edge surface
US3263328A (en) * 1965-04-22 1966-08-02 Burnie J Craig Adjustable disposable razor
CH444710A (fr) * 1964-08-18 1967-09-30 Neukomm Walter Rasoir

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2108797A (en) * 1935-06-22 1938-02-22 Gregory J Comstock Method of producing hard cemented carbide composites
US2900719A (en) * 1956-08-24 1959-08-25 Supreme Products Corp Cutters for electric shavers
US3064349A (en) * 1959-03-28 1962-11-20 Braun Ag Shaving head for dry shavers having a coated cutting edge surface
CH444710A (fr) * 1964-08-18 1967-09-30 Neukomm Walter Rasoir
US3263328A (en) * 1965-04-22 1966-08-02 Burnie J Craig Adjustable disposable razor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044427A (en) * 1976-05-21 1977-08-30 Rogers Corporation Comber roll
US4858324A (en) * 1984-01-11 1989-08-22 Edge Engineering, Inc. Knife blades and method of making said knife blades
US20050274020A1 (en) * 2004-06-04 2005-12-15 Rovcal, Inc. Cutting blade and cutting blade assembly for electric shaver
US7191522B2 (en) 2004-06-04 2007-03-20 Rovcal, Inc. Cutting blade and cutting blade assembly for electric shaver

Also Published As

Publication number Publication date
CH493311A (de) 1970-07-15
NL6906481A (fr) 1969-11-04
FR2007677A1 (fr) 1970-01-09
DE1703330A1 (de) 1971-12-30
SE343007B (fr) 1972-02-28
AT297528B (de) 1972-03-27
GB1257988A (fr) 1971-12-22

Similar Documents

Publication Publication Date Title
US3681846A (en) Knife blade construction
US2562104A (en) Cutting head for dry shaving razors
US2182067A (en) Process of manufacturing a shaving tool
US3064349A (en) Shaving head for dry shavers having a coated cutting edge surface
US2900719A (en) Cutters for electric shavers
US2331274A (en) Dry shaver
US3564715A (en) Dry shaver shear plate
US2817146A (en) Safety razor and guard means therefor
US3597844A (en) Movable cutter for shaving apparatus
US2098036A (en) Safety razor
US2234894A (en) Process of making comb for shaving implements
US3093899A (en) Improvements to the cutting heads of dry shaving apparatus
US2288162A (en) Electric shaver
US2273524A (en) Shaving device with offset slots
US2336638A (en) Electric razor
US2297915A (en) Electric razor
US2279102A (en) Electric razor
US2105223A (en) Hair clipper
US2591403A (en) Shaver head
US2182066A (en) Electric shaver and shearing blade therefor
US2701414A (en) Dry shaving device
US2440586A (en) Shear head for electric dry shavers
US1895763A (en) Safety razor blade
US2461444A (en) Haircutting comb
US2221119A (en) Guard for razors and hair clippers