US3597844A - Movable cutter for shaving apparatus - Google Patents
Movable cutter for shaving apparatus Download PDFInfo
- 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
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)
- Nonmetal Cutting Devices (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Knives (AREA)
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)
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)
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 |
-
1968
- 1968-05-02 DE DE19681703330 patent/DE1703330A1/de active Pending
-
1969
- 1969-04-24 US US819050A patent/US3597844A/en not_active Expired - Lifetime
- 1969-04-25 NL NL6906481A patent/NL6906481A/xx unknown
- 1969-04-30 CH CH664869A patent/CH493311A/de not_active IP Right Cessation
- 1969-04-30 SE SE6187/69*A patent/SE343007B/xx unknown
- 1969-04-30 AT AT421669A patent/AT297528B/de not_active IP Right Cessation
- 1969-04-30 GB GB1257988D patent/GB1257988A/en not_active Expired
- 1969-04-30 FR FR6913907A patent/FR2007677A1/fr not_active Withdrawn
Patent Citations (5)
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)
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 |
---|---|
SE343007B (fr) | 1972-02-28 |
AT297528B (de) | 1972-03-27 |
GB1257988A (fr) | 1971-12-22 |
DE1703330A1 (de) | 1971-12-30 |
FR2007677A1 (fr) | 1970-01-09 |
CH493311A (de) | 1970-07-15 |
NL6906481A (fr) | 1969-11-04 |
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