EP0365570A1 - Process for producing relief patterns - Google Patents

Process for producing relief patterns

Info

Publication number
EP0365570A1
EP0365570A1 EP19880905766 EP88905766A EP0365570A1 EP 0365570 A1 EP0365570 A1 EP 0365570A1 EP 19880905766 EP19880905766 EP 19880905766 EP 88905766 A EP88905766 A EP 88905766A EP 0365570 A1 EP0365570 A1 EP 0365570A1
Authority
EP
European Patent Office
Prior art keywords
screen printing
keys
relief patterns
pattern
varnish
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.)
Withdrawn
Application number
EP19880905766
Other languages
German (de)
French (fr)
Inventor
Hannes Riebl
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0365570A1 publication Critical patent/EP0365570A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/16—Braille printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J5/00—Devices or arrangements for controlling character selection
    • B41J5/08—Character or syllable selected by means of keys or keyboards of the typewriter type
    • B41J5/12—Construction of key buttons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/008—Sequential or multiple printing, e.g. on previously printed background; Mirror printing; Recto-verso printing; using a combination of different printing techniques; Printing of patterns visible in reflection and by transparency; by superposing printed artifacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/18—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks
    • H01H2009/189—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks with a tactile symbol or indication, e.g. for blind people
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00—Facilitation of operation; Human engineering
    • H01H2217/014—Facilitation of operation; Human engineering handicapped
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00—Facilitation of operation; Human engineering
    • H01H2217/024—Profile on actuator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/028—Printed information
    • H01H2219/034—Coloured areas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/002—Screen printing

Definitions

  • the invention relates to a method for producing relief patterns according to the preamble of claim 1.
  • the invention is therefore based on the object of providing relief patterns as a delimitation on keys or touch fields To produce the shape of contact actuating knobs on foils, to improve the grip or the like in a similarly simple, inexpensive manner, which are also more resistant than embossed or otherwise shaped relief patterns.
  • the relief patterns in question can be produced easily and permanently without expensive tools by avoiding break-prone embossed edges or the like.
  • Normal screen printing techniques can be used. This is all the more important where, for example, keys, touch panels or the like or the foils in question are to be screen-printed anyway.
  • the screen printing varnish applied according to the invention can be transparent or colored, as desired. In the former case, the relief pattern applied underneath gives undiminished colorations or imprints. Appropriate adjustment of the screen printing varnish and / or multiple printing allows a high relief height to be achieved within wide limits with high precision. -
  • FIG. 1 shows a broken top view of a computer keyboard provided with relief patterns according to the claimed method
  • FIG. 2 shows a broken cross section through one of the relevant keys according to section line II-II in FIG. 1, greatly enlarged, and
  • FIG. 3 in a similar enlargement a section through a section of a touch panel with a film as a cover, such as is used in pocket calculators.
  • the keyboard shown as an example in Fig. 1 in natural size presents a Sonderentwickl 'ung for disabled, esp. Spastiker,. These include, but still the different color in the rest of the keys are 2 this keyboard ver after bean ⁇ cast-method with a relief strip pattern 4 ⁇ see such that this surrounds a middle round or - in the case of elongated keys - an elongated recess 6 rounded at its ends.
  • the stripe pattern 4 consists of a plurality - in the case of "normal" keys, for example 11 - parallel stripes 8 made of transparent screen printing varnish.
  • the individual distances 10 between the strips 8 are somewhat narrower than the strips 8 themselves, the pitch in this example being 1.5 mm.
  • the strips 8 have an approximately semicircular profile, which is generally in one with an appropriately viscous screen printing varnish Operation is to be obtained. If necessary, however, multiple printing can be carried out, the lacquer being at least partially cured between the individual printing processes.
  • the transparent screen printing varnish allows the coloring underneath as well as colored imprints 12 of the keys to appear without hindrance.
  • the keys 2 have a colored border 14, which can also be produced as a relief pattern according to the claimed method. In many cases such a border may be sufficient to make it easier to find or find the keys, but the stripe pattern 4 is an additional relief in this regard.
  • the film 16 shown in FIG. 3 is on the upper side in the described screen printing technique with a relief pattern in the form of a network 18 for the obvious separation of the individual tactile areas, e.g. 20, 22 and 24 and on the underside provided with contact actuating knobs 26 for selective contact on contact spring leaves 28.
  • the net 18 can be colored in any way, independently of the knobs 26.
  • the knobs 26 do not appear on the upper side, and any fragile edges are missing.
  • a relief pattern applied by the method according to the invention results in a better one Grip.
  • a relief pattern applied by the method according to the invention provides an additional, perceptible delimitation.

Abstract

Un procédé permet de produire par sérigraphie des motifs en relief délimités sur des touches ou des parties de touches, ces motifs prenant la forme de boutons d'actionnement par effleurement sur des pellicules qui améliorent leur adhésivité ou similaire. Si nécessaire l'impression peut se faire en plusieurs passages. On utilise de préférence un vernis sensible aux rayons ultra-violets comme vernis de sérigraphie. Dans le cas où l'on produit des boutons d'actionnement par effleurement adjacents à des motifs en relief situés du côté supérieur, on peut imprimer les deux côtés d'une même pellicule.A process makes it possible to produce, by screen printing, relief patterns delimited on keys or parts of keys, these patterns taking the form of touch-actuating buttons on films which improve their adhesiveness or the like. If necessary, printing can be done in several passes. Preferably a varnish sensitive to ultraviolet rays is used as screen printing varnish. In the case of producing touch actuation buttons adjacent to relief patterns located on the upper side, it is possible to print both sides of the same film.

Description

Verfahren zum Herstellen von Reliefmustern Process for making relief patterns
Die Erfindung betrifft ein Verfahren zum Herstellen von Reliefmustern gemäß Gattungsbegriff des Anspruchs 1.The invention relates to a method for producing relief patterns according to the preamble of claim 1.
Es ist bekannt, Folien zum Bekleben von Tasten, Tastfeldern oder dergl. durch Prägung mit einem Reliefmuster in Form einer Umrandung, Abteilung oder dergl. zu versehen. Derar¬ tige Reliefmuster sollen das Auffinden bzw. genaue Treffen durch Zuhilfenahme des Tastsinns erleichern. Indessen erfor¬ dert das Prägen verhältnismäßig teure Werkzeuge. Auch läßt die Prägung Kanten entstehen, die eine Bruchanfälligkeit aufweisen. Sofern auch noch unterseitige Noppen hinzutreten sollen, wie dies für eine präzise Kontaktbetätigung er¬ wünscht sein kann, und diese unterseitigen Noppen oberseitig nicht in Erscheinung treten sollen, müssen zwei Folien geprägt und daraufhin paßgenau miteinander verklebt werden.It is known to provide foils for sticking buttons, touch fields or the like by embossing with a relief pattern in the form of a border, department or the like. Relief patterns of this type are intended to make it easier to find them or to make precise matches by using the sense of touch. However, the stamping requires relatively expensive tools. The embossing also creates edges that are prone to breakage. If nubs on the underside are also to be added, as may be desired for precise contact actuation, and nubs on the underside should not appear on the upper side, two foils must be embossed and then glued to one another with a precise fit.
Aus der DE-PS 34 04 723 ist es andererseits bekannt, durch Blinde ertastbare Symbole, wie Blindenschriften, Hinweis¬ schilder und Etiketten, unter Verwendung des Siebdrucks mit UV-Trocknung herzustellen.From DE-PS 34 04 723 it is known, on the other hand, to produce symbols that can be felt by the blind, such as Braille, information signs and labels, using screen printing with UV drying.
Der Erfindung liegt von daher die Aufgabe zugrunde, Relief¬ muster als Eingrenzung auf Tasten oder Tastfeldern, in Gestalt von Kontaktbetätigungsnoppen an Folien, zur Verbesse¬ rung der Griffigkeit oder dergl. auf ähnlich einfache, kostengünstige Weise herzustellen, die zudem widerstands¬ fähiger sind als geprägte oder sonstwie geformte Relief¬ muster.The invention is therefore based on the object of providing relief patterns as a delimitation on keys or touch fields To produce the shape of contact actuating knobs on foils, to improve the grip or the like in a similarly simple, inexpensive manner, which are also more resistant than embossed or otherwise shaped relief patterns.
Diese Aufgabe ist erfindungsgemäß durch das Kennzeichnungs¬ merkmal des Anspruchs 1 gelöst. Die Unteransprüche geben vorteilhafte Ausgestaltungsmöglichkeiten an.This object is achieved according to the invention by the characterizing feature of claim 1. The subclaims indicate advantageous design options.
Die betreffenden Reliefmuster lassen sich ohne teure Werk¬ zeuge leicht und dauerhaft herstellen, indem bruchanfällige Prägekanten oder dergl. vermieden werden. Dabei können ganz normale Siebdrucktechniken Anwendung finden. Dies ist umso mehr dort von Bedeutung, wo etwa Tasten, Tastfel¬ der oder dergl. bzw. die betreffenden Folien ohnehin im Siebdruck bedruckt werden sollen. Je nach Wunsch kann der erfindungsgemäß aufgebrachte Siebdrucklack transparent oder farbig sein. Im ersteren Fall läßt das aufgetragene Reliefmuster darunter befindliche Färbungen oder Aufdrucke ungeschmälert in Erscheinung treten. Durch entsprechende Einstellung des Siebdrucklackes und/oder durch Mehrfachdruck läßt sich mit hoher Präzision eine in weiten Grenzen belie¬ big große Reliefhöhe erreichen. -The relief patterns in question can be produced easily and permanently without expensive tools by avoiding break-prone embossed edges or the like. Normal screen printing techniques can be used. This is all the more important where, for example, keys, touch panels or the like or the foils in question are to be screen-printed anyway. The screen printing varnish applied according to the invention can be transparent or colored, as desired. In the former case, the relief pattern applied underneath gives undiminished colorations or imprints. Appropriate adjustment of the screen printing varnish and / or multiple printing allows a high relief height to be achieved within wide limits with high precision. -
Von besonderem Vorteil hat sich das erfindungsgemäße Be¬ drucken von Computer- oder Schreibmaschinentasten mit einem e-ine mittlere Aussparung bildenden Muster, z.B. Streifen¬ muster, erwiesen. Sodann können Handgriffe, Drehknöpfe und dergl. zur Verbesserung ihrer Griffigkeit mit entspre¬ chenden Reliefmustern bedruckt werden. Im Falle der Her¬ stellung von Kontaktbetätigungsnoppen an Folien erübrigt sich das Aufkleben einer zweiten Folie.The printing according to the invention of computer or typewriter keys with a pattern forming an central recess, e.g. Stripe pattern, proven. Then handles, knobs and the like can be printed with corresponding relief patterns to improve their grip. In the case of the production of contact actuating knobs on foils, the gluing of a second foil is unnecessary.
Nachfolgend werden Ausführungsbeispiele des erfindungs- gemäßen Verfahrens anhand der Zeichnungen genauer beschrie¬ ben. Von diesen zeigtExemplary embodiments of the inventive according to the method described in more detail with reference to the drawings. Of these shows
Fig. 1 eine abgebrochene Draufsicht auf eine nach dem bean¬ spruchten Verfahren mit Reliefmustern versehene Computer-Tastatur,1 shows a broken top view of a computer keyboard provided with relief patterns according to the claimed method,
Fig. 2 einen abgebrochenen Querschnitt durch eine der be¬ treffenden Tasten gemäß Schnittlinie II-II in Fig. 1, stark vergrößert, undFIG. 2 shows a broken cross section through one of the relevant keys according to section line II-II in FIG. 1, greatly enlarged, and
Fig. 3 in ähnlicher Vergrößerung einen Schnitt durch einen Ausschnitt eines Tastfeldes mit einer Folie als Abdeckung, wie es etwa bei Taschenrechnern Verwendung findet.Fig. 3 in a similar enlargement a section through a section of a touch panel with a film as a cover, such as is used in pocket calculators.
Die in Fig. 1 in natürlicher Größe beispielhaft gezeigte Tastatur stellt eine Sonderentwickl'ung für Behinderte, insbes. Spastiker, dar. Dazu noch sind jedoch die im übrigen verschiedenfarbigen Tasten 2 dieser Tastatur nach dem bean¬ spruchten Verfahren mit einem Relief-Streifenmuster 4 ver¬ sehen derart, daß dieses eine mittlere runde bzw. - bei länglichen Tasten - eine an ihren Enden abgerundete läng¬ liche Aussparung 6 umgibt.The keyboard shown as an example in Fig. 1 in natural size presents a Sonderentwickl 'ung for disabled, esp. Spastiker,. These include, but still the different color in the rest of the keys are 2 this keyboard ver after bean¬ cast-method with a relief strip pattern 4 ¬ see such that this surrounds a middle round or - in the case of elongated keys - an elongated recess 6 rounded at its ends.
Wie ersichtlich, besteht das Streifenmuster 4 aus einer Mehrzahl - bei "normalen" Tasten beispielsweise 11 - zu¬ einander parallelen Streifen 8 aus transparentem Siebdruck¬ lack. Die einzelnen Abstände 10 zwischen den Streifen 8 sind etwas schmäler als die Streifen 8 selbst, wobei das Teilungsmaß in diesem Beispiel 1,5 mm beträgt.As can be seen, the stripe pattern 4 consists of a plurality - in the case of "normal" keys, for example 11 - parallel stripes 8 made of transparent screen printing varnish. The individual distances 10 between the strips 8 are somewhat narrower than the strips 8 themselves, the pitch in this example being 1.5 mm.
Wie aus Fig. 2 ersichtlich, besitzen die Streifen 8 ein etwa halbrundes Profil, das mit einem entsprechend viskos eingestellten Siebdrucklack im allgemeinen in einem einzigen Arbeitsgang zu erhalten ist. Im Bedarfsfall kann jedoch ein Mehrfachdruck erfolgen, wobei zwischen den einzelnen Druck¬ vorgängen eine zumindest teilweise Aushärtung des Lackes vorgenommen werden wird.As can be seen from FIG. 2, the strips 8 have an approximately semicircular profile, which is generally in one with an appropriately viscous screen printing varnish Operation is to be obtained. If necessary, however, multiple printing can be carried out, the lacquer being at least partially cured between the individual printing processes.
Der transparente Siebdrucklack läßt die darunter befindliche Farbgebung wie auch farbige Aufdrucke 12 der Tasten unge¬ hindert in Erscheinung treten.The transparent screen printing varnish allows the coloring underneath as well as colored imprints 12 of the keys to appear without hindrance.
Zusätzlich zu dem Streifenmuster 4 und dem farbigen Aufdruck 12 weisen die Tasten 2 eine farbige Umrandung 14 auf, die gleichfalls als Reliefmuster nach dem beanspruchten Verfah¬ ren hergestellt werden kann. In vielen Fällen mag eine solche Umrandung genügen, um das Treffen bzw. Auffinden der Tasten zu erleichtern, doch bildet das Streifenmuster 4 in dieser Hinsicht eine zusätzliche Erleichterung.In addition to the stripe pattern 4 and the colored imprint 12, the keys 2 have a colored border 14, which can also be produced as a relief pattern according to the claimed method. In many cases such a border may be sufficient to make it easier to find or find the keys, but the stripe pattern 4 is an additional relief in this regard.
Die in Fig. 3 gezeigte Folie 16 ist oberseitig in der be¬ schriebenen Siebdrucktechnik mit einem Reliefmuster in Gestalt eines Netzes 18 zur sinnfälligen Trennung der einzel¬ nen Tastbezirke wie z.B. 20, 22 und 24 sowie unterseitig mit Kontaktbetätigungsnoppen 26 versehen zur punktuellen Auflage auf Kontaktfederblättchen 28. Dabei kann das Netz 18, unabhängig von den Noppen 26 beliebig eingefärbt sein. Die Noppen 26 treten oberseitig nicht in Erscheinung, und irgendwelche bruchanfälligen Kanten fehlen.The film 16 shown in FIG. 3 is on the upper side in the described screen printing technique with a relief pattern in the form of a network 18 for the obvious separation of the individual tactile areas, e.g. 20, 22 and 24 and on the underside provided with contact actuating knobs 26 for selective contact on contact spring leaves 28. The net 18 can be colored in any way, independently of the knobs 26. The knobs 26 do not appear on the upper side, and any fragile edges are missing.
Insbes. bei Aufbringen des Reliefmusters im Mehrfachdruck empfiehlt es sich, als Siebdrucklack einen UV-Lack zu ver¬ wenden. Darüber hinaus ist ein solcher besonders lösungs¬ mittelbeständig.Esp. when applying the relief pattern in multiple printing, it is advisable to use a UV varnish as the screen printing varnish. In addition, such is particularly solvent-resistant.
In vielen Fällen, so beispielsweise auch bei Schalthebeln, Drehknöpfen und dergl. ergibt ein nach dem erfindungsge¬ mäßen Verfahren aufgebrachtes Reliefmuster eine bessere Griffigkeit. Bei Tastfeldern, die normalerweise lediglich optisch gegeneinander abgegrenzte Tasten aufweisen, wie dies etwa bei Taschenrechnern neuerdings vielfach anzutref¬ fen ist, ergibt ein nach dem erfindungsgemäßen Verfahren aufgebrachtes Reliefmuster eine zusätzliche, erfühlbare Abgrenzung. In many cases, for example also with shift levers, rotary knobs and the like, a relief pattern applied by the method according to the invention results in a better one Grip. In the case of touch fields, which normally only have optically delimited keys, as is often found recently in pocket calculators, a relief pattern applied by the method according to the invention provides an additional, perceptible delimitation.

Claims

Patentansprüche: Claims:
1. Verfahren zum Herstellen von Reliefmustern als Eingren¬ zung auf Tasten oder Tastfeldern, in Gestalt von Kontakt¬ betätigungsnoppen an Folien, zur Verbesserung der Griffig¬ keit oder dergl., dadurch g e k e n n z e i c h n e t , daß das Muster (4) im Siebdruckverf hren erzeugt wird.1. A method for producing relief patterns as a limitation on keys or touch fields, in the form of contact actuating knobs on foils, for improving the grip or the like, so that the pattern (4) is produced by screen printing.
2. Verfahren nach Anspruch 1, dadurch g e k e n n ¬ z e i c h n e t , daß als Siebdruckverfahren das UV-Lack- Siebdruckverfahren angewandt wird.2. The method according to claim 1, characterized g e k e n n ¬ z e i c h n e t that the UV varnish screen printing process is used as a screen printing process.
3. Verfahren nach Anspruch 1 oder 2, dadurch g e k e n n ¬ z e i c h n e t , daß das Muster (4) im Mehrfachdruck mit zumindest teilweisem Aushärtenlassen zwischen den einzelnen Druckvorgängen erzeugt wird.3. The method according to claim 1 or 2, characterized g e k e n n ¬ z e i c h n e t that the pattern (4) is produced in multiple printing with at least partial curing between the individual printing processes.
4. Verfahren nach einem der vorhergehenden Ansprüche, da¬ durch g e k e n n z e i c h n e t , daß das Muster (4) in Form paralleler Streifen (8) mit gegenseitigen Abständen (10) aufgebracht wird.4. The method according to any one of the preceding claims, da¬ by g e k e n n z e i c h n e t that the pattern (4) in the form of parallel strips (8) with mutual distances (10) is applied.
5. Verfahren nach Anspruch 4, dadurch g e k e n n ¬ z e i c h n e t , daß die Streifen (8) mit einem Teilungsmaß zwischen etwa 1 und 2 mm, vorzugsweise von etwa 1,5 mm, aufgebracht werden. '5. The method according to claim 4, characterized g e k e n n ¬ z e i c h n e t that the strips (8) with a pitch between about 1 and 2 mm, preferably of about 1.5 mm, are applied. '
6. Verfahren nach einem der vorhergehenden Ansprüche, da¬ durch g e k e n n z e i c h n e t , daß unterseitige Kon¬ taktbetätigungsnoppen mit oberseitigen Reliefmustern für Tastfelder auf ein und derselben Folie erzeugt werden. 6. The method according to any one of the preceding claims, characterized by the fact that contact actuation nubs on the underside are produced with relief patterns on the top side for touch fields on one and the same film.
EP19880905766 1987-06-23 1988-06-22 Process for producing relief patterns Withdrawn EP0365570A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873720702 DE3720702A1 (en) 1987-06-23 1987-06-23 METHOD FOR PRODUCING RELIEF PATTERNS
DE3720702 1987-06-23

Publications (1)

Publication Number Publication Date
EP0365570A1 true EP0365570A1 (en) 1990-05-02

Family

ID=6330115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880905766 Withdrawn EP0365570A1 (en) 1987-06-23 1988-06-22 Process for producing relief patterns

Country Status (3)

Country Link
EP (1) EP0365570A1 (en)
DE (1) DE3720702A1 (en)
WO (1) WO1988010193A1 (en)

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IL106069A0 (en) * 1992-06-25 1993-10-20 Ontario Ltd 498775 Silk screen tactile prints and process
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JP2004086438A (en) 2002-08-26 2004-03-18 Brother Ind Ltd Molded component, operation panel, electronic apparatus, and method of manufacturing molded component
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FR2907564B1 (en) * 2006-10-24 2015-04-10 Joseph Bernard Lamerand KEYBOARD, IN PARTICULAR FOR COMPUTER
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DE3236256A1 (en) * 1982-09-30 1984-04-05 Manfred 7307 Aichwald Dörler Film, in particular key membrane for actuation of electric contacts, and process for its production
DE3404723A1 (en) * 1984-02-10 1985-09-05 Kolbe-Druck GmbH & Co KG, 4804 Versmold Production of symbols which can be felt by blind persons

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Also Published As

Publication number Publication date
DE3720702A1 (en) 1989-01-05
WO1988010193A1 (en) 1988-12-29
DE3720702C2 (en) 1989-05-11

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