US3927581A - Method for manufacturing dry shaver-cutter unit - Google Patents

Method for manufacturing dry shaver-cutter unit Download PDF

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Publication number
US3927581A
US3927581A US455535A US45553574A US3927581A US 3927581 A US3927581 A US 3927581A US 455535 A US455535 A US 455535A US 45553574 A US45553574 A US 45553574A US 3927581 A US3927581 A US 3927581A
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US
United States
Prior art keywords
strip
support member
edges
cutter
wound
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
US455535A
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English (en)
Inventor
Alojzy Antoni Kolodziej
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.)
Ronson Products Ltd
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Ronson Products Ltd
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Filing date
Publication date
Application filed by Ronson Products Ltd filed Critical Ronson Products Ltd
Priority to US05/635,093 priority Critical patent/US4044636A/en
Application granted granted Critical
Publication of US3927581A publication Critical patent/US3927581A/en
Assigned to NIHON SIBER HEGNER, K.K. reassignment NIHON SIBER HEGNER, K.K. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RONSON CORPORATION A CORP OF NJ
Assigned to SECURITY PACIFIC BUSINESS CREDIT INC.,, Lazere Financial Corporation reassignment SECURITY PACIFIC BUSINESS CREDIT INC., SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RONSON CORPORATION
Assigned to FOOTHILL CAPITAL CORPORATION, A CORP. OF CA reassignment FOOTHILL CAPITAL CORPORATION, A CORP. OF CA SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RONSON CORPORATION
Anticipated expiration legal-status Critical
Assigned to RONSON CORPORATION reassignment RONSON CORPORATION RELEASE OF SECURITY INTEREST IN PATENTS Assignors: WELLS FARGO FOOTHILL, INC.
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S76/00—Metal tools and implements, making
    • Y10S76/08—Razor blade manufacturing

Definitions

  • ABSTRACT [30] Foreign Application Priority Data A method is provided for forming the cutter unit of a Apr. 2, 1973 United Kingdom .l 15759/73 dry Shaver by winding Flongated StriPPf cutter terial edgewise nto a hellcal configuranon.
  • the stnp 52 us Cl 76/104 76/DIG' 30/346 is initially formed with longitudinally extending undu- 51 Int. (:1. B21K 11/00; 3263 19/04 lations of after it is helically Wound a longi- [58] Field Of Search 76/104 R, DIG. 8' mdinally extending Support member is Provided 30 34 51; 29 73; 5 164/98 trally of the helical configuration.
  • The-present invention relates generally to cutting units for dry shavers and more particularly to a dry shaver of the type wherein the cutting unit is reciprocally located within a perforated foil.
  • the perforated foil is placed in contact with the skin and hair protruding through the perforations of the foil is cut by the shearing action occurring between the cutting edge of the reciprocated cutter unit and the edges of the perforations.
  • a wire is wound on a mandrel having a circular cross section with a subsequent grinding operation being performed to provide a cutting edge for the cutter unit.
  • Cutters made in accordance with this prior art method of manufacture have not, however, been found satisfactory primarily due to the fact that it is difficult to grind or otherwise provide a cutting edge in the unit. Furthermore, it has been found that the blades themselves develop an inherent weakness. 1
  • the present invention is directed to a method for manufacturing a cutting unit of this type which will exhibit superior operating characteristics and which will not create adverse manufacturing problems.
  • the inner edge of the strip is wound in a helical pattern.
  • the strip may be wound about the mandrel with sufficient tightness such as to enable the mandrel to serve as a central support member for the cutter unit.
  • the cutter strip may be adhered to the mandrel upon which it is wound.
  • the helically wound strip may be removed from the mandrel after the winding operation and a support structure formed from molded plastic material or metal may be subsequently provided. Molding of the plastic or metal support member within the helical configuration formed by the cutter strip will operate to impart structural rigidity to the unit and to form the unit as a rigid body.
  • FIG. 1 is a perspective view depicting a portion of a metallic ribbon or cutter strip used in the method of the present invention in constructing an inner cutter unit;
  • FIG. 2 is a perspective diagram showing the shape of a portion of the cutter strip after it has been wound in a helical configuration and depicting the distortion which occurs in the undulations or waves of the cutter strip or ribbon which has been wound edgewise to form the helix:
  • FIG. 3 is a perspective view of a cutter strip wound in the form of a helix
  • FIG. 4 is a perspective view of a portion of a cutter unit comprising a cutter strip wound in helical form and having a molded support member within which the cutter strip is embedded.
  • FIG. 1 a cutter strip or ribbon 1 which is utilized in the performance of the method of the present invention to form the cutter unit.
  • the strip 1 may be made of any suitable cutter material and it is formed with undulations or waves which extend longitudinally of the strip throughout its length.
  • the strip 1 comprises a pair of longitudinal edges 2 and 3 and it will be seen that when the strip is viewed edgewise looking in the direction of the arrow X the edge 2 of the strip will be formed with a wave pattern which may be generally described as sinusoidal in nature.
  • the strip is shown before it is wound in a helical arrangement and it will be noted that the wave pattern of the edges 2 and 3 is substantially identical with the strip in this condition.
  • the strip shown in FIG. 1 is first wound edgewise into a helical configuration 4, as shown in FIG. 3. With the strip wound in the form shown in FIG. 3, the edge 3 will be located radially inwardly of the edge 2 relative to the overall pattern of the helix which is formed.
  • a mandrel (not shown) may be used and the helix 4 may be formed by winding the strip 1 with the edge 3 abuting the mandrel.
  • the mandrel used will thus serve as a guide structure for winding of the helix 4.
  • the mandrel used may be of a circular cross section having a relatively small radius and because of the form of the strip or ribbon l, the bending or winding operation may be accomodated without damage to the cutter stripl.
  • FIG. 2 The effect of bending or winding the strip 1 into the helical configuration 4 is depicted in FIG. 2. It will be seen that when the winding operation has been performed, the wave pattern of the inner edge 3 will be different from the wave pattern of the outer edge 2. That is, the inner edge 3 will have a wave amplitude which is greater than the wave amplitude of the outer edge 2. Furthermore, the wave lengths of the wave formations of the edges 2 and 3 will be different, with the outer edge 2 having a longer wave length than the inner edge 3. Thus it will be seen that compared with the strip formation shown in FIG.
  • the mandrel which is used as a guide member in winding the strip may also be ultimately utilized as a centrally located support member for the helically wound cutter strip.
  • the strip 1 may be wound tightly upon the mandrel, which may be provided as a hollow body, so that the mandrel forms part of the finished unit and operates to support the helix.
  • the helix 4 may be removed from the mandrel after the winding operation in which case it will be in the condition depicted in FIG. 3. In this condition, absent the central support member, the helical cutter strip would have the characteristics of a helical spring of similar proportion but it will clearly not comprise a rigid structure.
  • the helix may be subsequently partly encased or embedded in a metal or plastic support body in order to impart sufficient structural rigidity to the finished unit.
  • Part of a cutter unit formed by such a procedure is depicted in FIG. 4 which comprises a molded support member 5 located internally and centrally of the helix 4. After it has been embedded in the molded support member 5, the outer edges of the cutter strip may be ground to provide the required cutting edges.
  • the support member 5 extends to more than half the diameter of the helix 4.
  • the support material may be formed to extend to a small distance inwardly from the outer edge of the cutter strip throughout the helix so that a solid core is produced for the cutter unit. With such a configuration, the outer edge of the helix or strip would be exposed to form a suitable cutting edge for the cutter unit.
  • a structurally stable cutter unit may be formed in a manner involving manufacturing procedures which are relatively simple and inexpensive.
  • the cutter strip 1 may be wound about a mandrel which may either be used as a guide body or which may also be used to form the central support core of the cutter unit by tightly winding and- /or adhering the cutter strip directly to the mandrel.
  • the mandrel may be removed after helical winding of the cutter strip and a plastic or metallic inner core may be molded with the helically formed cutter strip imbedded therein to produce a solid, rigid cutter unit exhibiting suitable structural characteristics.
  • a method for making a cutter unit for a dry shaver assembly comprising the steps of providing an elongated strip of cutter material, forming in said strip undulations extending in a longitudinal direction of said strip, winding said strip edgewise into a helical configuration, providing a longitudinal support member for said strip, and embedding portions of said strip in said longitudinal support member to mount said strip thereupon.
  • a cutter unit for a dry shaver assembly comprising an elongated strip of cutter material, said strip being wound edgewise in a helical configuration, undulations extending in a longitudinal direction of said strip, and a longitudinal support member having parts of said strip embedded therein for mounting said strip upon said support member.
  • said strip comprises a length dimension which is greater than a width dimension of said strip, with a pair of generally parallel edges extending in the direction of said length dimension on opposite sides of said strip, said longitudinally extending undulations being formed so that said strip defines a waved configuration having a wave length and amplitude substantially idential along both said edges of said strip before said winding step is performed, and wherein after performance of said winding step said strip is shaped with the wave length and amplitude of the wave pattern extending along one of said edges being increased and decreased, respectively, while the wave length and amplitude defined along the other of said edges is decreased and increased, respectively.
  • edgewise wound strip is formed with one of said edges located radially inwardly of the other of said edges and wherein said radially innermost edge is formed with a wave configuration having a greater amplitude and a lesser wave length than the amplitude and wave length of the other outermost edge.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Dry Shavers And Clippers (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
US455535A 1973-04-02 1974-03-28 Method for manufacturing dry shaver-cutter unit Expired - Lifetime US3927581A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/635,093 US4044636A (en) 1973-04-02 1975-11-25 Method and apparatus for forming a helical cutter strip for a dry shaver assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1575973A GB1420830A (en) 1973-04-02 1973-04-02 Dry shavers

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/635,093 Continuation-In-Part US4044636A (en) 1973-04-02 1975-11-25 Method and apparatus for forming a helical cutter strip for a dry shaver assembly

Publications (1)

Publication Number Publication Date
US3927581A true US3927581A (en) 1975-12-23

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ID=10064967

Family Applications (1)

Application Number Title Priority Date Filing Date
US455535A Expired - Lifetime US3927581A (en) 1973-04-02 1974-03-28 Method for manufacturing dry shaver-cutter unit

Country Status (11)

Country Link
US (1) US3927581A (enrdf_load_stackoverflow)
JP (1) JPS5413825B2 (enrdf_load_stackoverflow)
KR (1) KR790001566B1 (enrdf_load_stackoverflow)
AR (1) AR199145A1 (enrdf_load_stackoverflow)
AT (1) AT330550B (enrdf_load_stackoverflow)
AU (1) AU475322B2 (enrdf_load_stackoverflow)
BR (1) BR7402564D0 (enrdf_load_stackoverflow)
CA (1) CA1008237A (enrdf_load_stackoverflow)
FR (1) FR2223144B1 (enrdf_load_stackoverflow)
GB (1) GB1420830A (enrdf_load_stackoverflow)
IT (1) IT1005916B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044636A (en) * 1973-04-02 1977-08-30 Ronson Corporation Method and apparatus for forming a helical cutter strip for a dry shaver assembly
US4589205A (en) * 1983-03-28 1986-05-20 Matsushita Electric Works, Ltd. Inner cutter for electric shavers
US5444914A (en) * 1992-11-23 1995-08-29 U.S. Philips Corporation Shaving apparatus
WO2006012412A1 (en) 2004-07-23 2006-02-02 The Gillette Company A cutter assembly and method of producing same
WO2006012411A1 (en) * 2004-07-23 2006-02-02 The Gillette Company Sharp undercutter and undercutter fabrication

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1054037A (en) * 1975-11-25 1979-05-08 Alojzy A. Kolodziej Method and apparatus for forming a helical cutter strip for a dry shaver assembly
US7314696B2 (en) 2001-06-13 2008-01-01 Eastman Kodak Company Electrophotographic toner and development process with improved charge to mass stability
US8147948B1 (en) 2010-10-26 2012-04-03 Eastman Kodak Company Printed article
US8626015B2 (en) 2010-10-26 2014-01-07 Eastman Kodak Company Large particle toner printer
US8465899B2 (en) 2010-10-26 2013-06-18 Eastman Kodak Company Large particle toner printing method
US8530126B2 (en) 2010-10-26 2013-09-10 Eastman Kodak Company Large particle toner

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2026630A (en) * 1933-06-19 1936-01-07 Artie B Harris Shearing device
US2178669A (en) * 1936-02-26 1939-11-07 Cooper & Cooper Inc Hair clipper
US3027635A (en) * 1959-06-03 1962-04-03 Donald E Frith Motor-powered shaver with pivotally mounted cutter assembly
US3045344A (en) * 1960-05-27 1962-07-24 Cholet Bertram Electric razor having rotatable cutter of triangular shape
US3060572A (en) * 1959-09-23 1962-10-30 Ever Ready Razor Products Ltd Cutting head for a dry shaver

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2026630A (en) * 1933-06-19 1936-01-07 Artie B Harris Shearing device
US2178669A (en) * 1936-02-26 1939-11-07 Cooper & Cooper Inc Hair clipper
US3027635A (en) * 1959-06-03 1962-04-03 Donald E Frith Motor-powered shaver with pivotally mounted cutter assembly
US3060572A (en) * 1959-09-23 1962-10-30 Ever Ready Razor Products Ltd Cutting head for a dry shaver
US3045344A (en) * 1960-05-27 1962-07-24 Cholet Bertram Electric razor having rotatable cutter of triangular shape

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044636A (en) * 1973-04-02 1977-08-30 Ronson Corporation Method and apparatus for forming a helical cutter strip for a dry shaver assembly
US4589205A (en) * 1983-03-28 1986-05-20 Matsushita Electric Works, Ltd. Inner cutter for electric shavers
US5444914A (en) * 1992-11-23 1995-08-29 U.S. Philips Corporation Shaving apparatus
WO2006012412A1 (en) 2004-07-23 2006-02-02 The Gillette Company A cutter assembly and method of producing same
WO2006012411A1 (en) * 2004-07-23 2006-02-02 The Gillette Company Sharp undercutter and undercutter fabrication
US20090038166A1 (en) * 2004-07-23 2009-02-12 The Gillette Company Sharp undercutter and undercutter fabrication
US20090211103A1 (en) * 2004-07-23 2009-08-27 Richard John Pretlove Cutter assembly and method of producing same
CN100556625C (zh) * 2004-07-23 2009-11-04 吉莱特公司 锋利的底切割器及底切割器的制造
CN100556626C (zh) * 2004-07-23 2009-11-04 吉莱特公司 切割器组合件及其生产方法
US7900360B2 (en) * 2004-07-23 2011-03-08 The Gillete Company Cutter assembly and method of producing same

Also Published As

Publication number Publication date
FR2223144A1 (enrdf_load_stackoverflow) 1974-10-25
GB1420830A (en) 1976-01-14
AR199145A1 (es) 1974-08-08
KR790001566B1 (ko) 1979-10-30
ATA249774A (de) 1975-09-15
CA1008237A (en) 1977-04-12
DE2416325A1 (de) 1974-10-10
BR7402564D0 (pt) 1974-11-19
FR2223144B1 (enrdf_load_stackoverflow) 1977-06-17
IT1005916B (it) 1976-09-30
JPS5030656A (enrdf_load_stackoverflow) 1975-03-26
AT330550B (de) 1976-07-12
JPS5413825B2 (enrdf_load_stackoverflow) 1979-06-02
AU475322B2 (en) 1976-08-19
AU6717874A (en) 1975-10-02
DE2416325B2 (de) 1976-05-20

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Owner name: NIHON SIBER HEGNER, K.K.

Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION A CORP OF NJ;REEL/FRAME:004286/0886

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Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION;REEL/FRAME:004431/0132

Effective date: 19850614

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Free format text: RELEASE OF SECURITY INTEREST IN PATENTS;ASSIGNOR:WELLS FARGO FOOTHILL, INC.;REEL/FRAME:022248/0313

Effective date: 20090209