EP0088476B1 - Process for producing a perforated foil for an electric dry-shaver with raised regions on the face contacting the skin - Google Patents

Process for producing a perforated foil for an electric dry-shaver with raised regions on the face contacting the skin Download PDF

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Publication number
EP0088476B1
EP0088476B1 EP83200299A EP83200299A EP0088476B1 EP 0088476 B1 EP0088476 B1 EP 0088476B1 EP 83200299 A EP83200299 A EP 83200299A EP 83200299 A EP83200299 A EP 83200299A EP 0088476 B1 EP0088476 B1 EP 0088476B1
Authority
EP
European Patent Office
Prior art keywords
foil
photoresist
thickness
producing
shear
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
Application number
EP83200299A
Other languages
German (de)
French (fr)
Other versions
EP0088476A1 (en
Inventor
Friedrich Blume
Lutz Voigtmann
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
Priority to AT83200299T priority Critical patent/ATE22710T1/en
Publication of EP0088476A1 publication Critical patent/EP0088476A1/en
Application granted granted Critical
Publication of EP0088476B1 publication Critical patent/EP0088476B1/en
Expired 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C25D1/08—Perforated or foraminous objects, e.g. sieves

Definitions

  • the invention relates to a method for producing a sieve-like shaving foil for an electrically operated dry shaving apparatus with elevations on its surface facing the skin.
  • Such shaving foils have the advantage that they slide easily on the skin even if it is oily or moist. This is not only perceived as pleasant during shaving, but it also significantly improves the quality of the shave.
  • a method for producing a shaving foil with elevations for an electrically operated dry shaving apparatus in which a metal plate is covered with the pattern of the perforated field and then a metal intermediate foil at the points corresponding to the grid of the sieve, the thickness of which Hole edge elevations are correspondingly greater than the thickness of the perforated field cover, are built up galvanically, and in which finely divided solid particles are applied to the surface of the intermediate metal foil and only then is the shaving foil galvanically deposited in a manner known per se and is removed from the intermediate metal foil by tearing.
  • the known method has the disadvantage that elevations are formed not only on the surface of the shaving foil facing the skin, but also in the region of the hole edge. This can result in undercuts, which on the one hand make the tearing of the shaving foil considerably more difficult, and on the other hand often result in a negative cutting angle at the cutting edges of the hole edge elevations, which adversely affects the cutting behavior.
  • the invention has for its object to provide a method for producing a screen-like shaving foil for an electrically operated dry shaving apparatus with elevations on its surface facing the skin, which eliminates the disadvantages mentioned, by eliminating undercuts and negative cutting angles at the cutting points of the hole edge elevations and this enables an even more economical and precise production of shaving foils in large quantities with improved cutting behavior.
  • the invention solves the problem by a method for producing a screen-like shaving foil for an electrically operated dry shaving apparatus with elevations on its surface facing the skin by covering an electrically conductive plate with the pattern of the perforated field and then galvanically building up an intermediate metal foil on the screen corresponding to the grid of the screen Places, the thickness of which is greater than the thickness of the perforated field cover corresponding to the hole edge elevations, and galvanic deposition of the shear foil on the metal intermediate foil and removal from the metal intermediate foil by tearing, whereby according to the invention the electrically conductive plate is provided with elevations of less height than the thickness of the perforated field cover.
  • the electrically conductive plate can be a metal plate; but it can also be a plate made of a non-electrically conductive material, the surface of which is designed to be electrically conductive.
  • the plate can be provided with the elevations before the covering with the pattern of the perforated field, for example by sandblasting, etching, non-cutting deformation.
  • the metal intermediate foil is deposited in a manner known per se; this has elevations only in the area of the height growth of the elevations on the plate and not in the hole edge area; this prevents the formation of undercuts on the shaving foil, which is now deposited in a manner known per se, and there are also no negative cutting angles at the cutting points of the hole edge elevations, the elevations are at the desired locations.
  • a brass plate is sandblasted to a roughness of a maximum of 15 11m. Then a photoresist layer 25 11m thick is applied and exposed and developed according to the desired shaving foil geometry through a template. Then a firmly adhering layer of a maximum of 10 jim is built up in a nickel bath. The passivating layer is then passivated and the metal intermediate foil, the thickness of which is greater than the thickness of the perforated area cover corresponding to the hole edge elevations, is built up in a non-leveling nickel bath, and the shaving foil is electrodeposited thereon after passivation in a slightly leveling nickel bath. The intermediate metal foil and the shaving foil are pulled off together and then the shaving foil is obtained by separation from the intermediate metal foil.
  • a brass plate is coated with a thickness of 25 tim with a photopolymer film, exposed according to the shear film geometry and developed.
  • a layer of nickel and silicon carbide with a thickness of 15 11 m is galvanically adhered from a silicon carbide containing a nickel bath containing a grain size of 5 to 10 ⁇ m, passivated and the metal intermediate foil, the thickness of which increases the perforations correspondingly larger than that.
  • the thickness of the perforated field cover is applied galvanically from a nickel bath.
  • the shaving foil is deposited on the metal intermediate foil from a slightly leveling nickel bath. The shaving foil is obtained by separating it from the intermediate metal foil.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

A method for producing a shear element having protrusions on the skin contacting surface thereof, including the steps of coating an electrically conductive surface with a photoresist, exposing the photoresist to a hold pattern and developing the photoresist to produce a grid pattern wherein the electrically conducting surface is exposed, the grid pattern defining hole areas wherein the electrically conductive surface is covered by islands of photoresist of a predetermined thickness, introducing irregularities into the surface elevation of the exposed grid, the surface irregularities being of lesser dimension of the thickness of the photoresist islands, depositing an intermediate foil onto the exposed grid overlying the introduced surface irregularities, the intermediate foil being of sufficient thickness to extend above the photoresist islands when deposited, depositing a shear foil overlying the intermediate foil, and removing the shear foil from the intermediate foil, thus producing a shear foil having protrusions on the skin contacting surface thereof but having relatively smooth surface in the regions surrounding shear openings corresponding to the locations of the photoresist islands.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer siebartigen Scherfolie für einen elektrisch betriebenen Trockenrasierapparat mit Erhebungen auf ihrer der Haut zugewandten Fläche.The invention relates to a method for producing a sieve-like shaving foil for an electrically operated dry shaving apparatus with elevations on its surface facing the skin.

Solche Scherfolien haben den Vorteil, dass sie auch dann auf der Haut leicht gleiten, wenn diese fettig oder feucht ist. Dies wird während der Rasur nicht nur als angenehm empfunden, sondern die Güte der Rasur wird dadurch erheblich verbessert.Such shaving foils have the advantage that they slide easily on the skin even if it is oily or moist. This is not only perceived as pleasant during shaving, but it also significantly improves the quality of the shave.

Aus der DE-A1 3 003 379 ist ein Verfahren zur Herstellung einer Scherfolie mit Erhebungen für einen elektrisch betriebenen Trockenrasierapparat bekannt, bei welchem eine Metallplatte mit dem Muster des Lochfeldes abgedeckt und anschliessend eine Metallzwischenfolie an den dem Gitter des Siebes entsprechenden Stellen, deren Dicke den Lochranderhöhungen entsprechend grösser als die Dicke der Lochfeldabdeckung ist, galvanisch aufgebaut wird, und bei dem auf die Oberfläche der Metallzwischenfolie feinverteilte Feststoffpartikel aufgebracht werden und erst danach in an sich bekannter Weise die Scherfolie galvanisch abgeschieden und von der Metallzwischenfolie durch Abriss entfernt wird.From DE-A1 3 003 379 a method for producing a shaving foil with elevations for an electrically operated dry shaving apparatus is known, in which a metal plate is covered with the pattern of the perforated field and then a metal intermediate foil at the points corresponding to the grid of the sieve, the thickness of which Hole edge elevations are correspondingly greater than the thickness of the perforated field cover, are built up galvanically, and in which finely divided solid particles are applied to the surface of the intermediate metal foil and only then is the shaving foil galvanically deposited in a manner known per se and is removed from the intermediate metal foil by tearing.

Das bekannte Verfahren hat den Nachteil, dass nicht nur an der der Haut zugewandten Fläche der Scherfolie Erhebungen gebildet werden, sondern auch im Lochrandbereich. Dadurch können sich Hinterschneidungen ergeben, die den Abriss der Scherfolie zum einen erheblich erschweren, zum anderen häufig einen negativen Schneidwinkel an den Schneidkanten der Lochranderhöhungen ergeben, der das Schneidverhalten ungünstig beeinflusst.The known method has the disadvantage that elevations are formed not only on the surface of the shaving foil facing the skin, but also in the region of the hole edge. This can result in undercuts, which on the one hand make the tearing of the shaving foil considerably more difficult, and on the other hand often result in a negative cutting angle at the cutting edges of the hole edge elevations, which adversely affects the cutting behavior.

Die Erfindung hat die Aufgabe, ein Verfahren zur Herstellung einer siebartigen Scherfolie für einen elektrisch betriebenen Trockenrasierapparat mit Erhebungen auf ihrer der Haut zugewandten Fläche zur Verfügung zu stellen, das die genannten Nachteile behebt, indem Hinterschneidungen und negative Schneidwinkel an den Schneidstellen der Lochranderhöhungen ausgeschlossen werden und dadurch eine noch wirtschaftlichere und genauere Herstellung von Scherfolien in grossen Stückzahlen bei verbessertem Schneidverhalten ermöglicht wird.The invention has for its object to provide a method for producing a screen-like shaving foil for an electrically operated dry shaving apparatus with elevations on its surface facing the skin, which eliminates the disadvantages mentioned, by eliminating undercuts and negative cutting angles at the cutting points of the hole edge elevations and this enables an even more economical and precise production of shaving foils in large quantities with improved cutting behavior.

Die Erfindung löst die Aufgabe durch ein Verfahren zur Herstellung einer siebartigen Scherfolie für einen elektrisch betriebenen Trockenrasierapparat mit Erhebungen auf ihrer der Haut zugewandten Fläche durch Abdecken einer elektrisch leitenden Platte mit dem Muster des Lochfeldes und anschliessendem galvanischen Aufbauen einer Metallzwischenfolie an den dem Gitter des Siebes entsprechenden Stellen, deren Dicke den Lochranderhöhungen entsprechend grösser als die Dicke der Lochfeldabdeckung ist, und galvanischer Abscheidung der Scherfolie an der Metallzwischenfolie und Entfernung von der Metallzwischenfolie durch Abriss, wobei erfindungsgemäss die elektrisch leitende Platte mit Erhebungen von geringerer Höhe als die Dicke der Lochfeldabdekkung versehen wird.The invention solves the problem by a method for producing a screen-like shaving foil for an electrically operated dry shaving apparatus with elevations on its surface facing the skin by covering an electrically conductive plate with the pattern of the perforated field and then galvanically building up an intermediate metal foil on the screen corresponding to the grid of the screen Places, the thickness of which is greater than the thickness of the perforated field cover corresponding to the hole edge elevations, and galvanic deposition of the shear foil on the metal intermediate foil and removal from the metal intermediate foil by tearing, whereby according to the invention the electrically conductive plate is provided with elevations of less height than the thickness of the perforated field cover.

Die elektrisch leitende Platte kann eine Metallplatte sein; es kann aber auch eine Platte aus einem nicht elektrisch leitendem Material sein, deren Oberfläche elektrisch leitend ausgebildet ist.The electrically conductive plate can be a metal plate; but it can also be a plate made of a non-electrically conductive material, the surface of which is designed to be electrically conductive.

Die Platte kann schon vor der Abdeckung mit dem Muster des Lochfeldes mit den Erhebungen versehen werden, zum Beispiel durch Sandstrahlen, Ätzen, spanlose Verformung. Es können aber auch erst die Abdeckung mit dem Muster des Lochfeldes vorgenommen und danach die Erhebungen vorgesehen werden, beispielsweise durch galvanische Abscheidung von Metall zusammen mit Feststoffen aus einer Dispersion an den stromleitenden Stellen der Platte.The plate can be provided with the elevations before the covering with the pattern of the perforated field, for example by sandblasting, etching, non-cutting deformation. However, it is also possible to first cover with the pattern of the perforated field and then to provide the elevations, for example by electrodeposition of metal together with solids from a dispersion at the electrically conductive points on the plate.

Die vorgenannten Verfahrensschritte können in an sich bekannter Weise mit an sich bekannten Zubereitungen vorgenommen werden.The aforementioned process steps can be carried out in a manner known per se with preparations known per se.

In an sich bekannter Weise wird die Metallzwischenfolie abgeschieden; diese weist Erhebungen nur in dem Bereich des Höhenwachstums der Erhebungen an der Platte auf und nicht im Lochrandbereich; dadurch wird die Bildung von Hinterschneidungen an der nunmehr in an sich bekannter Weise abgeschiedenen Scherfolie verhindert und es bilden sich auch keine negativen Schneidwinkel an den Schneidstellen der Lochranderhöhungen, die Erhebungen befinden sich an den gewünschten Stellen.The metal intermediate foil is deposited in a manner known per se; this has elevations only in the area of the height growth of the elevations on the plate and not in the hole edge area; this prevents the formation of undercuts on the shaving foil, which is now deposited in a manner known per se, and there are also no negative cutting angles at the cutting points of the hole edge elevations, the elevations are at the desired locations.

Die Erfindung wird durch die folgenden Beispiele näher erläutert.The invention is illustrated by the following examples.

Beispiel 1example 1

Eine Messingplatte wird durch Sandstrahlen auf eine Rauhigkeit von maximal 15 11m Rauhtiefe gebracht. Danach wird eine Photolackschicht von 25 11m Dicke aufgebracht und entsprechend der gewünschten Scherfoliengeometrie durch eine Schablone belichtet und entwickelt. Danach wird in einem Nickelbad eine festhaftende Schicht von maximal 10 jim aufgebaut. Anschliessend wird passiviert und in einem nicht einebnenden Nickelbad die Metallzwischenfolie, deren Dicke den Lochranderhöhungen entsprechend grösser als die Dicke der Lochfeldabdeckung ist, aufgebaut und an dieser nach Passivierung in einem gering einebnenden Nickelbad die Scherfolie galvanisch abgeschieden. Die Metallzwischenfolie und die Scherfolie werden gemeinsam abgezogen und danach die Scherfolie durch Abtrennung von der Metallzwischenfolie gewonnen.A brass plate is sandblasted to a roughness of a maximum of 15 11m. Then a photoresist layer 25 11m thick is applied and exposed and developed according to the desired shaving foil geometry through a template. Then a firmly adhering layer of a maximum of 10 jim is built up in a nickel bath. The passivating layer is then passivated and the metal intermediate foil, the thickness of which is greater than the thickness of the perforated area cover corresponding to the hole edge elevations, is built up in a non-leveling nickel bath, and the shaving foil is electrodeposited thereon after passivation in a slightly leveling nickel bath. The intermediate metal foil and the shaving foil are pulled off together and then the shaving foil is obtained by separation from the intermediate metal foil.

Beispiel 2Example 2

Eine Messingplatte wird in einer Dicke von 25 tim mit einer Photopolymerfolie beschichtet, entsprechend der Scherfoliengeometrie belichtet und entwickelt. An den freigelegten Stellen der Platte wird aus einem Siliziumkarbid in einer Korngrösse von 5 bis 10 µm enthaltenden Nickelbad galvanisch eine Schicht aus Nickel und Siliziumkarbid in einer Dicke von 15 11m festhaftend aufgebracht, passiviert und die Metallzwischenfolie, deren Dicke den Lochranderhöhungen entsprechend grösser als die. Dicke der Lochfeldabdeckung ist, galvanisch aus einem Nickelbad aufgebracht. Nach Passivierung wird an der Metallzwischenfolie aus einem gering einebnenden Nickelbad die Scherfolie abgeschieden. Die Scherfolie wird durch Abtrennen von der Metallzwischenfolie gewonnen.A brass plate is coated with a thickness of 25 tim with a photopolymer film, exposed according to the shear film geometry and developed. At the exposed areas of the plate, a layer of nickel and silicon carbide with a thickness of 15 11 m is galvanically adhered from a silicon carbide containing a nickel bath containing a grain size of 5 to 10 µm, passivated and the metal intermediate foil, the thickness of which increases the perforations correspondingly larger than that. The thickness of the perforated field cover is applied galvanically from a nickel bath. After passivation, the shaving foil is deposited on the metal intermediate foil from a slightly leveling nickel bath. The shaving foil is obtained by separating it from the intermediate metal foil.

Claims (1)

  1. A process for producing a perforated foil for an electric dry shaver with raised regions on the face contacting the skin by covering an electrically conducting plate with the pattern of the perforated field and subsequent galvanic building up of a metal intermediate foil at the places corresponding to the lattice of the foil, the thickness of which, corresponding to the raised edges of the holes, is greater than the thickness of the perforated field covering, and electro-deposition of the cutting foil on the metal intermediate foil and removal from the metal intermediate foil by tearing off, characterised in that the electrically conducting plate is provided with raised portions having a lower height than the thickness of the perforated field covering.
EP83200299A 1982-03-06 1983-02-28 Process for producing a perforated foil for an electric dry-shaver with raised regions on the face contacting the skin Expired EP0088476B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83200299T ATE22710T1 (en) 1982-03-06 1983-02-28 METHOD OF MANUFACTURE OF A MESH-LIKE SHAVING FOIL FOR AN ELECTRICALLY POWERED DRY SHAVER WITH PROFILE ON ITS SKIN-FACING SURFACE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823208081 DE3208081A1 (en) 1982-03-06 1982-03-06 METHOD FOR PRODUCING A SHEET-LIKE SHEAR FILM FOR AN ELECTRICALLY OPERATED DRY SHAVER WITH Raises On Its Face Facing The Skin
DE3208081 1982-03-06

Publications (2)

Publication Number Publication Date
EP0088476A1 EP0088476A1 (en) 1983-09-14
EP0088476B1 true EP0088476B1 (en) 1986-10-08

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EP83200299A Expired EP0088476B1 (en) 1982-03-06 1983-02-28 Process for producing a perforated foil for an electric dry-shaver with raised regions on the face contacting the skin

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US (1) US4552832A (en)
EP (1) EP0088476B1 (en)
JP (1) JPS58157985A (en)
AT (1) ATE22710T1 (en)
DE (2) DE3208081A1 (en)

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Also Published As

Publication number Publication date
ATE22710T1 (en) 1986-10-15
EP0088476A1 (en) 1983-09-14
JPS625235B2 (en) 1987-02-03
DE3208081A1 (en) 1983-09-08
US4552832A (en) 1985-11-12
JPS58157985A (en) 1983-09-20
DE3366717D1 (en) 1986-11-13

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