EP0466097B1 - Magnetisch betriebene Anzeigevorrichtung und Verfahren zu ihrer Herstellung - Google Patents

Magnetisch betriebene Anzeigevorrichtung und Verfahren zu ihrer Herstellung Download PDF

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Publication number
EP0466097B1
EP0466097B1 EP91111407A EP91111407A EP0466097B1 EP 0466097 B1 EP0466097 B1 EP 0466097B1 EP 91111407 A EP91111407 A EP 91111407A EP 91111407 A EP91111407 A EP 91111407A EP 0466097 B1 EP0466097 B1 EP 0466097B1
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EP
European Patent Office
Prior art keywords
display element
coating
station
magnetic
magnetic particles
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
EP91111407A
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English (en)
French (fr)
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EP0466097A3 (en
EP0466097A2 (de
Inventor
Oded Peled
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Individual
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Individual
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Publication of EP0466097A3 publication Critical patent/EP0466097A3/en
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Publication of EP0466097B1 publication Critical patent/EP0466097B1/de
Anticipated expiration legal-status Critical
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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
    • G09F9/375—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements the position of the elements being controlled by the application of a magnetic field

Definitions

  • the present invention relates to magnetically-actuated display elements, and also to a method of making such display elements.
  • the invention is particularly applicable to making the disc-shape display elements as described, for example, in generic document US-A-3,871,945 and US-A-3,942,274, and is therefore described below with respect to such an application, but it will be appreciated that the invention could advantageously be used in making display elements of other configurations, for example of spherical or cylindrical configuration.
  • Magnetically-actuated displays of the foregoing type comprise a plurality of display elements of disc configuration arranged in a rectangular matrix of horizontal rows and vertical columns, with each display element being coloured with contrasting colours on the its opposite sufaces.
  • Each display element is pivotally mounted to a supporting member to permit it to be pivoted to two stable positions.
  • Each element displays one of the surfaces of contrasting colour, and includes a magnet cooperable with fixed electromagnetic means on the supporting member for pivoting the display element to selected positions in order to produce variable displays among the plurality of display elements.
  • each display element is a magnetic body occupying a relatively small area of the display element.
  • This requires the magnetic body to be of appreciable thickness, and thereby requires the display element also to be of appreciable thickness.
  • Such a construction increases the mass of the display element, and therefore the time and/or power required to change the displays.
  • displays using such a construction are relatively expensive to produce.
  • An object of the present invention is to provide a display element for magnetically-actuated displays having advantages in the above respects.
  • a magnetically-actuated display element comprising a plurality of surfaces of contrasting colour, mounting means for movably mounting the display element to permit it to assume a plurality of stable positions each displaying one of said surfaces of one of contrasting colour, and a magnet carried by the display element and cooperable with fixed electromagnetic means for moving said display element to a selected one of its plurality of stable positions; characterized in that said display element comprises a non-magnetic substrate, and a coating thereover of magnetic particles bound to the non-magnetic substrate by an adhesive.
  • the display element is of disc shape and is formed with a pair of diametrically-opposed ears constituting the mounting means and permitting pivoting the disc to one of two stable positions, one face of the disc being one of the colours, and the opposite face of the disc carrying the coating of magnetic particles and being of the other colour.
  • the other colour is preferably in the form of a coating of colouring matter over the coating of magnetic particles bound to the substrate.
  • the adhesive is preferably an epoxy resin; and the non-magnetic substrate is preferably of plastic material, such as Mylar plastic film. It is contemplated, however, that the non-magnetic substrate may also be of metal, such as copper or aluminum.
  • the present invention also provides a method of making the above-described display elements comprising: feeding a continuous strip of the non-magnetic substrate, having one face coloured with the one colour, through a plurality of stations; coating the opposite face of the strip with the adhesive at one station; coating the adhesive with a layer of the magnetic particles at a second station; drying the adhesive to bind the magnetic particles to the opposite face of the strip at a third station; coating the layer of magnetic particles with the other colour at a fourth station; and punching out the disc-shaped display elements from the strip at a fifth station.
  • relatively thin display elements may be constructed in accordance with the present invention in volume and at low cost.
  • a continuous strip, generally designated 2 of a non-magnetic substrate is continuously fed through a plurality of stations at which various processes are formed on the continuous strip to produce a plurality of display elements 4 at the final station in the process.
  • the continuous strip 2 may be of a plastic material, such as Mylar plastic film; alternatively, it could be of a metal, such as copper or aluminum. In either case, it is of one colour on one face (that hidden from view in the drawing), while the various operations are formed on the opposite face (that exposed to view).
  • the continuous strip 2 is first passed to an adhesive station 10 wherein a coating of adhesive supplied from a reservoir 12 is applied, as by spraying, brushing or calendering, onto the exposed face of the strip to cover substantially the complete surface with the adhesive, as shown at 14.
  • a coating of adhesive supplied from a reservoir 12 is applied, as by spraying, brushing or calendering, onto the exposed face of the strip to cover substantially the complete surface with the adhesive, as shown at 14.
  • the strip is passed through station 20 at which magnetic particles, preferably in fine powder form, are applied from a reservoir 22 to coat substantially the complete surface of the adhesive coating 14, as shown at 24.
  • the strip is then applied through a dryer station 30 wherein the adhesive is dried and thereby to bind the magnetic particles 24 to the respective face of strip 2.
  • the continuous strip 2 is passed through a colour-coating station 40, in which colouring matter is applied, as by spraying, onto the dried coating of magnetic particles.
  • the colour of the mattter applied at station 40 is of course of a contrasting colour from that carried by the hidden surface of the strip.
  • the continuous strip 2 is fed through another drying station 50, and then through a magnetizing station 60 in which an electromagnetic 62 magnetizes the coating of magnetic particles.
  • the magnetic particles are of "hard” magnetic material, so that the particles are thereby permanently magnetized in a predetermined direction.
  • the continuous strip 2 is passed through a punching station 70, wherein a punch 72, in the shape of the display element 4 to be produced, punches out the display elements 4 from the continuous strip 2.
  • the display elements 4 so-produced are of disc shape and include ears 4a at diametrically-opposite sides so as to permit a plurality of such display elements to be pivotally mounted in the form of rectangular matrices in their respective housings, as shown at 80 in Fig. 2. Since such matrices and housings are well-known, for example as described in the above-cited patents, they are not illustrated in detail herein. It will be appreciated, however, that such housings include fixed electromagnets, shown schematically at 82, which are selectively energizable to pivot the display elements to a respective one of their two stable positions, i.e., exposing one or the other face, thereby to selectively expose one or the other of their colours according to the information to be displayed.
  • the continuous strip 2 may be of any suitable non-magnetic material, such as plastic or metal.
  • it should be sufficiently stiff so that the display element, produced by applying to it the various layers described above, retains its shape when such display elements are mounted in the display housing as shown in Fig. 2, but preferably should be sufficiently flexible to permit the display element to be manually flexed in order to snap its ears 4a into the openings provided in the display housing for pivotally mounting the display elements.
  • the invention enables the production of relatively thin display elements in a continuous, low-cost and high-volume manner.
  • the display element may be of cylindrical, spherical, or other shape.
  • the coating of magnetic particles could be applied to a substrate which is adhesively bonded to the display element.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Burglar Alarm Systems (AREA)

Claims (9)

  1. Ein magnetisch betriebenes Anzeigeelement (4), das eine Mehrzahl von Oberflächen kontrastierender Farbe umfaßt, ein Montagemittel (4a) für eine bewegbare Montage des Anzeigeelements (4), um es zu erlauben, eine Mehrzahl von stabilen Positionen einzunehmen, wobei in jeder jeweils eine der kontrastierenden Farboberflächen sichtbar wird, und ein Magnet, das durch das Anzeigeelement getragen wird und mit festen elektromagnetischen Mitteln zusammenwirken kann, um das Anzeigeelement zu einer der ausgewählten Stellungen dessen Mehrzahl von ausgewählten Stellungen zu bewegen; dadurch gekennzeichnet, daß das Anzeigeelement (4) ein nicht-magnetisches Substrat (2) und einen darüberliegenden Überzug aus magnetischen Teilchen (24) umfaßt, der durch ein Klebemittel an das nicht-magnetische Substrat gebunden ist.
  2. Das Anzeigeelement (4) nach Anspruch 1, wobei das Anzeigeelement scheibenförmig ist und mit einem Paar diametral entgegengesetzter Ösen (4a) geformt ist, die das Montagemittel bilden und die der Scheibe erlauben, sich in einer von den zwei stabilen Positionen zu drehen, wobei eine Seite der Scheibe eine der Farben ist, und wobei die gegenüberliegende Seite der Scheibe den Überzug aus magnetischen Teilchen (24) trägt und die andere der Farben ist.
  3. Das Anzeigeelement nach Anspruch 2, wobei die andere der Farben in Form eines Überzuges aus einem Farbmittel über dem Überzug aus magnetischen Teilchen (24), die am Substrat gebunden sind, gebildet ist.
  4. Das Anzeigeelement nach jedem der Ansprüche 1-3, wobei das nicht-magnetische Substrat (2) aus Plastik besteht.
  5. Das Anzeigeelement nach jedem der Ansprüche 1-3, wobei das nicht-magnetische Substrat (2) aus Kupfer besteht.
  6. Das Anzeigeelement nach jedem der Ansprüche 1-3, wobei das nicht-magnetische Substrat (2) aus Aluminium besteht.
  7. Ein magnetisch betriebenes Anzeigeelement, das eine Mehrzahl von Anzeigeelementen (4) nach jedem der Ansprüche 1-6 umfaßt, die in horizontalen Reihen und vertikalen Spalten auf einem Stützteil (80) angeordnet sind, und ein elektromagnetisches Mittel (82), das an dieses Stützteil zur selektiven Bewegung der Anzeigeelemente (4) befestigt ist.
  8. Ein Verfahren zur Herstellung magnetisch betriebener Anzeigeelemente nach jedem der Ansprüche 2-7, umfassend:
       die Zuführung eines kontinuierlichen Streifens (2) des nicht-magnetischen Substrats, dessen eine Seite mit der einen Farbe gefärbt ist, durch eine Mehrzahl von Stationen;
       das Überziehen der gegenüberliegenden Seite des Streifens mit dem Klebemittel an einer Station (10) ;
       das Überziehen des Klebemittels mit einer Schicht der magnetischen Teilchen an einer zweiten Station (30) ;
       das Trocknen des Klebemittels an einer dritten Station (30), um die magnetischen Teilchen an die gegenüberliegende Seite des Streifens (2) zu binden;
       das Überziehen der Schicht der magnetischen Teilchen mit einer anderen Farbe an einer vierten Station (40); und
       das Ausstanzen der scheibenförmigen Anzeigeelemente (4) aus dem Streifen an einer fünften Station (70).
  9. Das Verfahren nach Anspruch 8, wobei die magnetischen Teilchen Teilchen eines Dauermagnetmaterials sind und diese Teilchen permanent an einer Magnetisierungsstation (60) magnetisiert werden, bevor die scheibenförmigen Anzeigeelemente an der Ausstanz-Station (70) aus dem Streifen ausgestanzt werden.
EP91111407A 1990-07-10 1991-07-09 Magnetisch betriebene Anzeigevorrichtung und Verfahren zu ihrer Herstellung Expired - Lifetime EP0466097B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL95017 1990-07-10
IL9501790A IL95017A (en) 1990-07-10 1990-07-10 Magnetically-actuated display elements and method of making same

Publications (3)

Publication Number Publication Date
EP0466097A2 EP0466097A2 (de) 1992-01-15
EP0466097A3 EP0466097A3 (en) 1992-07-22
EP0466097B1 true EP0466097B1 (de) 1995-12-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111407A Expired - Lifetime EP0466097B1 (de) 1990-07-10 1991-07-09 Magnetisch betriebene Anzeigevorrichtung und Verfahren zu ihrer Herstellung

Country Status (7)

Country Link
EP (1) EP0466097B1 (de)
AT (1) ATE131304T1 (de)
CA (1) CA2046462A1 (de)
DE (1) DE69115143T2 (de)
ES (1) ES2081395T3 (de)
GR (1) GR3019210T3 (de)
IL (1) IL95017A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001343914A (ja) 2000-06-05 2001-12-14 Three M Innovative Properties Co 可変イメージ表示体
JP2002062825A (ja) * 2000-08-18 2002-02-28 Sony Corp 画像表示装置及びその製造方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942274A (en) * 1974-04-15 1976-03-09 Ferranti-Packard Limited Strip module for sign element
IT1208358B (it) * 1987-03-31 1989-06-12 Brussino Massimo Procedimento per la produzione di laminato plastico magnetico e laminato magnetico ottenuto con tale procedimento

Also Published As

Publication number Publication date
ES2081395T3 (es) 1996-03-01
CA2046462A1 (en) 1992-01-11
DE69115143D1 (de) 1996-01-18
EP0466097A3 (en) 1992-07-22
GR3019210T3 (en) 1996-06-30
IL95017A0 (en) 1991-06-10
DE69115143T2 (de) 1996-05-09
EP0466097A2 (de) 1992-01-15
ATE131304T1 (de) 1995-12-15
IL95017A (en) 1995-07-31

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