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US3696508A - Shearing system for dry shavers - Google Patents

Shearing system for dry shavers Download PDF

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Publication number
US3696508A
US3696508A US65391A US3696508DA US3696508A US 3696508 A US3696508 A US 3696508A US 65391 A US65391 A US 65391A US 3696508D A US3696508D A US 3696508DA US 3696508 A US3696508 A US 3696508A
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US
United States
Prior art keywords
hole
apertures
slot means
slot
shearing
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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
US65391A
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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
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Filing date
Publication date
Application filed by Braun GmbH filed Critical Braun GmbH
Application granted granted Critical
Publication of US3696508A publication Critical patent/US3696508A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/384—Dry-shaver foils; Manufacture thereof

Definitions

  • ABSTRACT A shearing foil for use with a dry shaving apparatus as an upper cutter having a major hole field formed therein, for allowing entry of the hair thereinto, such hole field containing a plurality of hole-like apertures having a predetermined lateral extension, a plurality of slots having a predetermined length, the length of each of the slots being greater than the largest dimension of the lateral extension of each of the hole-like apertures, the hole-like apertures and the slots being formed in the body of the foil in a mixed fashion and being separated from each other by strips resulting from the formation of adjacent ones of hole-like apertures and the slots.
  • the present invention relates to a shearing'system for dry shavers having an upper cutter which isprovided for the entry of the hair with a pluralityofapertures separated from each other by strips and which are at.
  • Aperture contours became known in a.wide variety of forms which can be divided into two groups-or. types completely differeing in their properties.
  • the other aperture form or type has one dimension which is distinctly larger than the other dimension thereof, such as in a rectangle.
  • Such apertures having one larger dimension than the diameter of the adjacent hole, are capable to catch longer hair pieces along the direction of their longitudinal extent and in the following description are designated as slots.
  • hole fields which are provided only with holes cannot completely eliminate long hair pieces while hole pieces which contain exclusively slots cannot avoid not to cause irritations or abrasions of the skin or, in the event such disadvantage is taken care of by a reduced slot width, they have a bad shaving performance.
  • an object of the present invention to provide a noveland improved 'shearingsystem for a dry shaver having a hole field efficiently combining at least two kinds of apertures capable of accommodating short and long hair pieces at high efficiency of shaving.
  • a hole field is created by the combination of the two types of apertures which is capable of removing short and long hairpieces in one sweep and also the possibility is provided to catch at the same time long hair pieces lying in. different directions without causing a skin irritationand without unfavorably affecting the optimum aperture relation factor.
  • the invention arose from the realization of the problem that the width of the slots, the practical purpose of which is to catch the long hair pieces which were left behind by the apertures adjacently located and being capable only of removing short hair pieces, be kept at a minimum in order to avoid skin irritations.
  • the invention proposes that the holes and slots of the above described type by placed in a hole field in a mixed fashion and, at the same time, to make useful length of the slots larger than the diameter of the associated holes.
  • the holes can be circular, however, it is preferred that they are rather circular-like in shape or polygonal, since the last mentioned shapes in combination with the slots provide an advantageous aperture relation and result in a better cutting angle then the strictly circular holes.
  • holes can be made in any shape polygonal from triangular to hexagonal.
  • combinations are also preferred in which between each pair of holes a slot is placed, that is, with each hole edge or side a slot is associated. In an optimum fashion each having a substantially constantly remaining width which then separates the hole from the slot.
  • the useful length of at least a portion of the slot must be larger than the diameter of the associated'hole in order to be able to accommodate the longer hair pieces.
  • the length of the slots placed between the holes is greater by at least a slot width than the edge of the associated hole.
  • the basic hole form is preferred in a hexagonal shape and it is also a preferred consideration, although not exclusive limitation of the invention, that each edge or side of the hexagon-shaped hole has a slot associated therewith.
  • the hexagon-shape produces a slot position in three directions similarly to a triangle, however, the hole in this form is still greater than a square or triangle would be.
  • the hexagonal hole which in the practice proved itself especially advantageous in simple hole fields as giving rise to favorable sperture factors and, therefore, became known since many years, is particularly preferred for practicing the present invention in the proposed combination with the slots.
  • the slots are formed as parallelograms and are placed in a rosette fashion around each hexagonal hole so that between each pair of hexagonal holes slots are placed in a generally vertical and horizontal directions, the slots running in three different directions and, thereby, they are capable to catch any kind of hair formations in combination with the holes.
  • all the slots are uniform in length then a uniform pattern of holes and slots is created.
  • the invention provides, without thereby changing the hole arrangement, that long slots be provided, that is distributed over the entire hole field in an individually placed fashion. Preferably such longer slots are running in different directions.
  • the triangle as a hole shape is not in any degree less capable to satisfy the requirements of the present invention.
  • This hole shape permits the use of hole edges or sides which deviate from a straight line. With this form a field pattern can be created in which the slots narrow in the middle of their length and widen toward the end so that the slots can be made very long without causing skin irritations and, at the same time, the slots can be made so wide that the hair pieces can be reliably caught therein.
  • FIG. 1 is a schematic representation of a shaving head used with a shaving apparatus
  • FIG. 2 illustrates a shearing foil in plan view
  • FIG. 3 is a magnified view of the portion enclosed in a circle in FIG. 2;
  • FIG. 4 is a schematic representation of a hole field of a shearing foil according to the present invention having square shaped holes with slots having equal length;
  • FIG. 5 is a schematic representation of a hole field similar to FIG. 4 in which a slot is assigned to each hole pair;
  • FIG. 6 is a schematic illustration of a portion of a hole field with hexagonal holes and slots having equal length
  • FIG. 7 is a schematic illustration of a portion of a hole field with hexagonal holes and slots having different length.
  • FIG. 8 is a hole field with triangularly shaped holes.
  • FIG. 1 illustrates a shearing head 8 in which a shearing foil 1 according to the present invention is secured under tension over a cutter block 9 in a known manner.
  • the cutter block or knife block 9 is formed in a lamallae fashion and is arranged under an angle along line 90 shown in FIG. 2. Such arrangement of the knife block 9 is especially advantageous with the configuration of the shearing foil shown in FIG. 4.
  • the shearing foil 1 is provided with a hole field 2 from which a unit portion enclosed in the circle 3 is shown in a magnified fashion in FIG. 6.
  • Foil l is provided with preferably holes 4 for mounting purposes.
  • the shape of the foil 1 as shown in FIG. 2 is square, however, it is within the scope of the invention to adapt the shape of the foil 1 to any shaving head such as to form it in a circular shape in the form of a round screen.
  • the holes are square-shaped having edges 201 and 204 which are straight.
  • Each of these edges 201 and 204 is separated by a strip and 28 from the adjacently located longitudinal slots 21 and 24, having edges similarly running along a straight line.
  • the resulting strips 25 and 28 have consequently constantly remaining widths.
  • the strip 25 is formed by both edges 201 and 211
  • strip 26 is by edges 202 and 212
  • strip 27 by edges 203 and 213
  • the strip 28 is formed by the edges 204 and 214.
  • the slots 24 are arranged in a counter clockwise fashion about the hole 20 which they surround and, it is seen that slot 21 is longer than the edge 201 of hole 20 by the width 220 of slot 22 and by the width of the strip 26 and thereby it is longer than the diagonal of the hole 20. Inasmuch as the holes are arranged symmetrically, the above consideration holds also for the slots 22 and 24.
  • the widths 210, 220, 230 and 240 are equal with each other, therefore, all strips 25 and 28 are also equal in their width.
  • FIG. 5 is an illustration employing square shaped holes, however, it intends to show how holes and slots can be combined in a uniform fashion under conditions when a slot is not enclosed between two holes as it was in FIG. 4.
  • Both holes 30 and 300 are arranged in pairs, that is they are separated only by a strip 39.
  • the hole pair 30, 300 is surrounded by slots 31 and 34 between the two of them having strips 35 and 38.
  • This arrangement has the advantage that on the same hole field more holes 30 and 300 can be arranged than it would be the case with the pattern shown in FIG. 4. Furthermore the slots 32, 34 are longer so that this shearing foil 1 is able to accommodate much longer hair pieces as well. In this embodiment the slots are also running in several directions angularly related with respect to each other.
  • the holes 30, 300 forming the slot pair in FIG. 5 are arranged over each other, that is, the pairs of holes lie in column 6 while along line 60 between each hole a slot is arranged.
  • the hole pair 30, 300 can be placed along the vertical line 60 and long slots can also'be placed along such line.
  • FIG. 6 illustrates aportion of the hole field encircled in FIG. 2 in a magnified fashion, and which ismore particularly shown in a less magnified manner in FIG. 3.
  • All holes40 are formed as hexagons. To each edge of the hexagon a slot 41 and 46 -is arrangedand are separated by strips 401 and 406.
  • strips 40l and 406 are of the same length and similarly shaped, that is, they have a constantly remaining width throughout their length so that with them it is not only possible to catch'the longer hair pieces in any position but also this embodiment provides for an advantageous aperture relation factor.
  • FIG. 7 differs from the embodiment shown in FIG. 6 in that in the latter slots with similar length 41 and 46 are'shown, while in FIG. 7 it is seen that long slots 47 can also be distributed in a hexagonal field. Notwithstanding the fact that in this embodiment small apertures 48 are created which hardly can be said to be adapted to cut the hair and this embodiment has a somewhat reduced aperture relation factor, however, even also this uniform hole field distribution is adapted to take care of long hair pieces by the presence of longer slots.
  • FIG. 8 This is shown in FIG. 8 in which the shearing foil is provided with triangularly shaped holes 50 having edges 500 which are curved and which have a larger radius of curvature than the circle which could be drawn about the corners of the triangular holes 50.
  • slots 51 and 53 are very desirable, since they are especially long, they can easily handle long hair pieces, they are narrow in the middle of their length due to the curve like edges of the associated holes, which fact has the advantage that the skin cannot enter these long slots, therefore, skin irritations are avoided which otherwise would be a common place with very long slots.
  • the slots 51 and 53 widen out about their ends so that long hair pieces are easily taken care of by such slots.
  • a shearing means for use with a dry shaving apparatus as an upper cutter means comprising a body portion having a major hole field formed therein, for allowing entry of the hair thereinto, said hole field containing a plurality of polygonal apertures formed in said body portion and having a predetermined lateral extension, a plurality of slot means having each a predetermined length, the length of each of said slot means being greater than the largest dimension of said lateral extension of each of said polygonal apertures, said polygonal apertures and said slot means being formed in said body portion in a mixed fashion, said body portion including strip means separating said polygonal apertures and said slot means from each other, wherein each of said slot means has an edge running parallel with an adjacent edge of an associated polygonal aperture.
  • each of said slot means in formed between a pair of adjacent hole-like apertures.
  • each of said hole-like apertures is surrounded by adjacent slot means in a rosette-like fashion.
  • each of said hole-like apertures has a hexagonal shape, said slot means being formed in a rosette fashion about said hexagonal apertures and having four longitudinal edges each running parallel with at least one edge of an associated one of said hexagonal hole-like apertures.
  • each of said slot means is formed as a parallelogram and being arranged with respect to said hole-like apertures much that at least one smaller edge of each of said slot means lies along a straight line with an edge of each associated hole-like aperture lying in the same row.
  • a shearing means for use with a dry shaving apparatus as an upper cutter means comprising a body portion having a major hole field formed therein, for allowing entry of the hair thereinto, said hole field containing a plurality of polygonal apertures formed in said body portion and having a predetermined lateral extension, a plurality of slot means having each a predetermined length, the length of each of said slot means being greater than the largest dimension of said lateral extension of each of said polygonal apertures, said polygonal apertures and said slot means being formed in said body portion in a mixed fashion, said body portion including strip means separating said polygonal apertures and said slot means from each other, each of said slot means having an edge running parallel with an adjacent edge of an associated polygonal aperture, each of said polygonal apertures being square-shaped and each of said slot means being rectangularly shaped.
  • Ashearing means for use with a dry shaving apparatus as an upper cutter means comprising a body portion having a major hole field formed therein, for allowing entry of the hair thereinto, said hole field containing a plurality of polygonal apertures formed in said body portion and having a predetermined lateral extension, a plurality of slot means having each a predetermined length, the length of each of said slot means being greater than the largest dimension of said lateral extension of each of said polygonal apertures, said polygonal apertures and said slot means being formed in said body portion in a mixed fashion, said body portion including strip means separating said polygonal apertures and said slot means from each other, each of said slot means having an edge running parallel with an adjacent edge of an associated polygonal aperture, said hole-like apertures being triangularly shaped.
  • a dry shaving apparatus comprising in combination an upper shearing means adapted to come into contact with the face of the user during shaving, an inner shearing means capable of undergoing a shearing movement and lying under pressure against said upper shearing means, said upper cutter means comprising a body portion having a major hole field formed therein, for allowing entry of the hair thereinto, said hole field containing a plurality of hole-like apertures formed in said body portion and having a predetermined lateral extension, a plurality of slot means having a predetermined length, the length of each of said slot means being greater than the largest dimension of said lateral extension of each of said hole-like apertures, said holelike apertures and said slot means being formed in said body portion in a mixed fashion and being separated from each other by strip means of said body portion UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent NO. 3,696,508 Dated October 10. 1972 lnventofls) Werner Messinger It is certified that error appears in the above-identified patent

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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)
US65391A 1969-08-26 1970-08-20 Shearing system for dry shavers Expired - Lifetime US3696508A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU59350 1969-08-26

Publications (1)

Publication Number Publication Date
US3696508A true US3696508A (en) 1972-10-10

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ID=19726140

Family Applications (1)

Application Number Title Priority Date Filing Date
US65391A Expired - Lifetime US3696508A (en) 1969-08-26 1970-08-20 Shearing system for dry shavers

Country Status (21)

Country Link
US (1) US3696508A (hu)
JP (1) JPS5549879B1 (hu)
AR (1) AR194338A1 (hu)
AT (1) AT303566B (hu)
CA (1) CA935985A (hu)
CH (1) CH528954A (hu)
CS (1) CS193008B2 (hu)
DE (1) DE2037871C3 (hu)
DK (1) DK127716B (hu)
ES (1) ES189367Y (hu)
FR (1) FR2056800A5 (hu)
GB (1) GB1311985A (hu)
HK (1) HK71576A (hu)
HU (1) HU162193B (hu)
NL (1) NL166420C (hu)
PL (1) PL80950B1 (hu)
RO (1) RO62046A (hu)
SE (1) SE369054B (hu)
SU (1) SU375834A3 (hu)
YU (1) YU33155B (hu)
ZA (1) ZA705504B (hu)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916522A (en) * 1973-10-08 1975-11-04 Matsushita Electric Works Ltd Outer blade for reciprocal type electric shaver
US3967373A (en) * 1973-03-22 1976-07-06 Matsushita Electric Works, Ltd. Outer blade for electric shaver
US4884338A (en) * 1988-07-18 1989-12-05 Stewart John V Electric shaver improvement
EP0599413A1 (en) * 1992-11-25 1994-06-01 Koninklijke Philips Electronics N.V. Shaving apparatus having a foil-like upper cutter and foil-like lower cutter
US20040168321A1 (en) * 2001-08-09 2004-09-02 Raoul Bader Shaving foil patterning
US20070022608A1 (en) * 2005-07-29 2007-02-01 The Procter & Gamble Company Shaving foil
US20120066909A1 (en) * 2006-11-08 2012-03-22 Martin Kluge Shaving Foil for an Electric Shaving Apparatus
US20130125401A1 (en) * 2003-11-11 2013-05-23 Panasonic Corporation Electric shaver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53131891U (hu) * 1978-03-02 1978-10-19

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093899A (en) * 1959-08-19 1963-06-18 Braun Ag Improvements to the cutting heads of dry shaving apparatus
US3269008A (en) * 1962-07-24 1966-08-30 Braun Ag Shaving apparatus head
US3382580A (en) * 1964-12-07 1968-05-14 Carinthia Elektrogerate Ges M Perforated cutter foil for dry shavers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH245456A (fr) * 1942-08-04 1946-11-15 Clouez Andre Philippe Tondeuse électrique pour poils.
DE940095C (de) * 1951-04-14 1956-03-08 Artur Braun Scherkammfolie fuer Trockenrasierapparate
DE1185951B (de) * 1963-03-19 1965-01-21 Johannes Schaller Ausbildung der kurvenfoermige Begrenzungskanten aufweisenden Loecher von Scherfolien elektrischer Rasierapparate und Verfahren zum Ermitteln deren Konturen
NL6615194A (hu) * 1966-10-27 1968-04-29

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093899A (en) * 1959-08-19 1963-06-18 Braun Ag Improvements to the cutting heads of dry shaving apparatus
US3269008A (en) * 1962-07-24 1966-08-30 Braun Ag Shaving apparatus head
US3382580A (en) * 1964-12-07 1968-05-14 Carinthia Elektrogerate Ges M Perforated cutter foil for dry shavers

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967373A (en) * 1973-03-22 1976-07-06 Matsushita Electric Works, Ltd. Outer blade for electric shaver
US3916522A (en) * 1973-10-08 1975-11-04 Matsushita Electric Works Ltd Outer blade for reciprocal type electric shaver
US4884338A (en) * 1988-07-18 1989-12-05 Stewart John V Electric shaver improvement
EP0599413A1 (en) * 1992-11-25 1994-06-01 Koninklijke Philips Electronics N.V. Shaving apparatus having a foil-like upper cutter and foil-like lower cutter
US5377414A (en) * 1992-11-25 1995-01-03 U.S. Philips Corporation Shaving apparatus having a foil-like upper cutter and a foil-like lower cutter
US7065879B2 (en) * 2001-08-09 2006-06-27 Braun Gmbh Shaving foil patterning
US20040168321A1 (en) * 2001-08-09 2004-09-02 Raoul Bader Shaving foil patterning
US20130125401A1 (en) * 2003-11-11 2013-05-23 Panasonic Corporation Electric shaver
US8806763B2 (en) * 2003-11-11 2014-08-19 Panasonic Corporation Electric shaver
US20070022608A1 (en) * 2005-07-29 2007-02-01 The Procter & Gamble Company Shaving foil
US7845079B2 (en) * 2005-07-29 2010-12-07 The Gillette Company Shaving foil
US20120066909A1 (en) * 2006-11-08 2012-03-22 Martin Kluge Shaving Foil for an Electric Shaving Apparatus
US8701296B2 (en) * 2006-11-08 2014-04-22 Braun Gmbh Shaving foil for an electric shaving apparatus

Also Published As

Publication number Publication date
HU162193B (hu) 1973-01-29
CH528954A (de) 1972-10-15
SU375834A3 (hu) 1973-03-23
RO62046A (fr) 1978-03-15
AT303566B (de) 1972-11-27
GB1311985A (en) 1973-03-28
FR2056800A5 (hu) 1971-05-14
NL7011782A (hu) 1971-03-02
SE369054B (hu) 1974-08-05
DK127716B (da) 1973-12-24
CS193008B2 (en) 1979-09-17
PL80950B1 (hu) 1975-08-30
HK71576A (en) 1976-11-19
DE2037871C3 (de) 1975-03-06
YU33155B (en) 1976-06-30
YU204070A (en) 1975-12-31
DE2037871B2 (de) 1974-07-11
ZA705504B (en) 1971-04-28
ES189367Y (es) 1974-11-16
CA935985A (en) 1973-10-30
NL166420B (nl) 1981-03-16
ES189367U (es) 1974-05-01
AR194338A1 (es) 1973-07-13
NL166420C (nl) 1981-08-17
DE2037871A1 (de) 1971-03-04
JPS5549879B1 (hu) 1980-12-15

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