US3839130A - Magnetic display board symbols - Google Patents

Magnetic display board symbols Download PDF

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Publication number
US3839130A
US3839130A US00360816A US36081673A US3839130A US 3839130 A US3839130 A US 3839130A US 00360816 A US00360816 A US 00360816A US 36081673 A US36081673 A US 36081673A US 3839130 A US3839130 A US 3839130A
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Prior art keywords
display board
article
layer
accordance
magnetic display
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Expired - Lifetime
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US00360816A
Inventor
C Dean
Callum D Mc
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Hutchinson Aerospace and Industry Inc
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Barry Wright Corp
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Publication date
Application filed by Barry Wright Corp filed Critical Barry Wright Corp
Priority to US00360816A priority Critical patent/US3839130A/en
Priority to FR7403035A priority patent/FR2230032A1/fr
Priority to CA193,003A priority patent/CA1027359A/en
Priority to JP49022467A priority patent/JPS5011598A/ja
Priority to NL7405678A priority patent/NL7405678A/xx
Priority to BR3869/74A priority patent/BR7403869D0/en
Priority to IT51038/74A priority patent/IT1011428B/en
Priority to DE2423907A priority patent/DE2423907A1/en
Application granted granted Critical
Publication of US3839130A publication Critical patent/US3839130A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/30—Scaffolding bars or members with non-detachably fixed coupling elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F5/00—Designs characterised by irregular areas, e.g. mottled patterns
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
    • G09F7/02—Signs, plates, panels or boards using readily-detachable elements bearing or forming symbols
    • G09F7/04—Signs, plates, panels or boards using readily-detachable elements bearing or forming symbols the elements being secured or adapted to be secured by magnetic means
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/15—Sheet, web, or layer weakened to permit separation through thickness
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24851—Intermediate layer is discontinuous or differential
    • Y10T428/24868—Translucent outer layer
    • Y10T428/24876—Intermediate layer contains particulate material [e.g., pigment, etc.]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • Y10T428/24909—Free metal or mineral containing
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof

Definitions

  • ABSTRACT A magnetic display board article comprises a thin, pla- 52 US.
  • the present invention relates to visual display devices in general and more particularly concerns magnetic display board symbols of rugged construction for long use with little degradation that are relatively inexpensive and easy to fabricate.
  • large area sheet laminates of permanently bonded layers comprise multiple symbol-forming article components therein as distinct patterns enclosed by scoring indentations.
  • the individual symbol forming article components can be broken out manually by bending the sheet to break through at the score line.
  • Each symbol forming component has permanent printed lines therein conforming to the score lines to enhance recognition.
  • the laminate comprises a thin, planar layer of ferrous, magnetically attractable particles of one or several particle thickness sandwiched between first and second planar, nonmagnetic layers at least one of which preferably is rigid enough to make the article as a whole rigid.
  • a first one of said nonmagnetic layers comprises the back face of the sheet.
  • the second layer is opaque and thicker than the first layer, preferably twice as thick or more.
  • the above-described printed matter is preferably imprinted on the face of said second layer away from the magnetic particle layer.
  • the printed face of the second layer is overlaid with a third nonmagnetic layer which is preferably made of clear plastic and has a lesser thickness than the second layer.
  • the second layer may be of single layer form or subdivided into multiple sublayer components. All of the above layers and sublayers are permanently bonded to each other.
  • the magnetic particle layer preferably comprises iron particles in a size range of 0.016 to 0.003 inches diameter of equivalent spheres or irregular shapes. This layer has sufficient density of particles that it has substantial areal continuity through side to side contacts between particles. It has been discovered that the ferromagnetic particle layer is protected from oxidation and consequent degradation of its ferro magnetic properties by the laminate construction and that sharp cutting edges are eliminated thereby consistent with obtaining the necessary magnetic attractable properties.
  • the laminate as a whole is resistant to delamination.
  • FIG. 1 is a plan view of a portion of a laminate sheet containing multiple symbol forming components therein;
  • FIG. 2 is a sectional view of a thickness of such sheet viewed as indicated by arrows 2-2 in FIG. 1.
  • FIG. 1 there is shown a rigid sheet 10 comprising a number of distinct symbol forming patterns 12 which are defined by score lines 14.
  • the sheet can be broken apart manually by bending so that the individual components 12 are separated at the score lines 14.
  • Each component has a printed pattern 16 therein corresponding to the score line 14 outline.
  • the pattern is spaced from the score line to define a B-pattem border 18 in the component.
  • Buffer zones 20 are provided between adjacent components so that no score line is at a common such component defining edges of both components.
  • the sheet 10 is of large area form, at least one half inch by one half inch in length and width dimensions thereof and preferably in excess of 6 inches by 6 inches and may be of the order of 48 inches by 96 inches.
  • the laminate thickness is between 30 and 60 mils, but may exceed these limits as required.
  • FIG. 2 shows an enlarged sectional view of a portion of the sheet 10.
  • the laminated sheet comprises a layer 22 of ferromagnetic iron powder particles of single particle thickness or several thicknesses which has areal continuity by side to side contact of particles in the single layer thickness thereof.
  • the ferromagnetic particle layer is sandwiched by a first plastic layer 24 and a second plastic or paper layer 26.
  • the third plastic layer 28 overlies the second layer 26 forming an interface 30 therebetween.
  • the first layer 24 and the third layer 28 are preferably clear rigid vinyl sheets.
  • the second layer 26 is preferably an opaque single vinyl sheet or a permanently bonded plurality of rigid vinyl sublayers. Other plastics may be substituted for vinyl.
  • a matte surface 32 is provided on layer 24 to enhance its frictional contact with a display board.
  • the smooth surface is provided on layer 28 to allow erasable writing thereon with a grease pencil or the like.
  • the permanent pattern defining printed matter is contained at the interface 30 between layers 26 and 28 and is preferably imprinted on layer 26 or on its topmost sublayer.
  • a preferred fabrication process for making the laminated particle 10 is as follows.
  • Two 0.015 inches rigid, opaque vinyl sheets are laminated by subjecting them to heat and pressure at 120C. or higher and at least 5 psi for at least seconds to produce layer 26 as a laminate. Then one side of the so-formed laminate is printed with the patterns indicated in FIG. 1 or any other desired permanent information or representation or left blank. The other side of the laminate is sprayed with a plastic adhesive of heat reactivating type. Iron powder particles are applied thereto as a monolayer by flocking. The iron particles are then overlaid with a 0.0018 inches vinyl layer, and the vinyl layer/iron particle layer/vinyl layer is then hot pressed under the same conditions as described above in connection with bonding the sublayers of layer 26. Steel rule dies may be used to cut out the scoring patterns (FIG. ll), if scoring patterns are desired.
  • the iron particles are imbedded in the surface of the layer 26 by the hot pressing process, thereby allowing layer 24 to contact layer 26 for permanent bonding of the layers and encapsulation of the iron particles consistent with maintaining areal continuity of the magnetic particles by side-to-side contact of a substantial number (preferably a majority) thereof for purposes of assuring an adequate density of particles affording the necessary magnetic coercive force for attractability to a magnetic display board or device. Such attractability is further assured by using a very thin layer 24 to minimize separation of the iron particle layer from the board.
  • the multiple sublayers of layer 26 can be made of paper instead of plastic.
  • the individual symbol forming article components 12 (FIG. 1) can be precut rather than maintained together on a scored sheet.
  • the laminate can also be used as a display board, per se, in combination with symbol forming magnets.
  • scoring includes conventional scoring or indentation or other marking forming an indicated site for cutting by punching, scissors, saw or other shear cutting means.
  • a magnetic display board article comprising means forming a thin planar layer of ferromagnetic particles of 0.016 to 0.003 inch diameter of one to four particle thicknesses,
  • first and second rigid planar nonmagnetic layers straddling the ferromagnetic particle layer and being permanently bonded thereto and to each other to form a permanent laminate
  • said first and second layers having sufficient rigidity to impart rigidity to the article as a whole wherein said article is a sheet with areal length and width dimensions of at least one-half inches by one-half inches with enclosed area scored symbol patterns in at least one face thereof.
  • a magnetic display board article in accordance with claim 3 wherein said thicker layer is subdivided into sublayers which are permanently bonded to each other. 5.
  • a magnetic display board article in accordance with claim 2 wherein said thicker layer is subdivided into sublayers which are permanently bonded to each other. 6.
  • a magnetic display board article in accordance with claim 1 wherein said ferromagnetic particle layer has areal continuity through particle to particle contact in the plane of the layer. 7.
  • a magnetic display board article in accordance with claim 1 wherein the article comprises a printed pattern of discrete outlines printed thereon and surrounded by closely spaced corresponding scoring patterns.
  • the article has cut edges, finger handling areal dimensions and shape.
  • the article is cut around a printed linear outline of a geometric design thereon with cut edges corresponding to and closely spaced to the outline.
  • a magnetic display board article in accordance with claim 1 as a display board.

Abstract

A magnetic display board article comprises a thin, planar laminate of a ferrous, magnetically attractable particle layer sandwiched between rigid plastic or paper layers. The article is preferably formed as a multiple symbol-containing sheet and may have scored, die-cut patterns therein and printed matter within each symbol pattern following the score outline. Each symbol pattern is manually removable along the scored edges to separate it from the sheet.

Description

United States Patent 1 1 1111 3,839,130 Dean et a1. Oct. 1, 1974 [54] MAGNETIC DISPLAY BOARD SYMBOLS 3,122,684 2/1964 Genin 40/142 A Inventors: Carl J. Dean, southbridge; Donald 3,189,981 6/1965 Gemn et al. 40/142 A B. McCallum, Douglas, both of FOREIGN PATENTS OR APPLICATIONS Mass- 842,480 7/1960 Great Britain 35/7 A [73] Assignee: Barry-Wright Corporation,
watertown Mass Primary Exammer-W1ll1am E. Schulz Attorney, Agent, or Firm-Milton E. Gilbert [22] Flled: May 16, 1973 [21] Appl. No.: 360,816 [57] ABSTRACT A magnetic display board article comprises a thin, pla- 52 US. (:1 161/18, 35/7 A,.40/l06.45, nar laminate of a ferrous, magnetically attractable P 40 42 ticle layer sandwiched between rigid plastic or paper 151 1111.01 B44t 7/00 layers The article is preferably formed as a multiple [58] Field 61 Search 161/18; 35/7 A, 53; Symbol-containing Sheet and y have scored, die-Cut 46/234, 236; 40/ 106.45, 142 A patterns therein and printed matter within each symbol pattern following the score outline. Each symbol [56] R f n Cited pattern is manually removable along the scored edges to separate it from the sheet,
2,002,077 5 1935 Darling et a1. 161/18 UX 11 Claims, 2 Drawing Figures PATENTED T 1 74 1 MAGNETIC DISPLAY BOARD SYMBOLS BACKGROUND OF THE INVENTION The present invention relates to visual display devices in general and more particularly concerns magnetic display board symbols of rugged construction for long use with little degradation that are relatively inexpensive and easy to fabricate.
It is an important object of the present invention to provide magnetically attractable symbol forming articles which are resistant to degradation in the course of long term usage.
It is a further object of the invention to provide such articles which are easy to fabricate, consistent with the foregoing object.
It is a further object of the invention to provide such articles which are economical consistent with one or both of the preceding objects.
It is a further object of the invention to provide protected permanent printing in such articles consistent with one or more of the preceding objects.
It is a further object of the invention to provide in such articles a capability of temporary printing thereon consistent with one or more of the preceding objects.
It is a further object of the invention to provide a safe article of the class described consistent with one or more of the preceding objects.
It is a further object of the invention to provide conveniently handleable articles of the class described consistent with one or more of the preceding objects.
It is a further object of the invention to provide subdivisible or discrete articles of the class described, with or without printed matter thereon consistent with one or more of the preceding objects.
It is a further object of the invention to provide compact articles of the class described consistent with one or more of the preceding objects.
SUMMARY OF THE INVENTION In accordance with the invention, large area sheet laminates of permanently bonded layers comprise multiple symbol-forming article components therein as distinct patterns enclosed by scoring indentations. The individual symbol forming article components can be broken out manually by bending the sheet to break through at the score line. Each symbol forming component has permanent printed lines therein conforming to the score lines to enhance recognition.
The laminate comprises a thin, planar layer of ferrous, magnetically attractable particles of one or several particle thickness sandwiched between first and second planar, nonmagnetic layers at least one of which preferably is rigid enough to make the article as a whole rigid. A first one of said nonmagnetic layers comprises the back face of the sheet. The second layer is opaque and thicker than the first layer, preferably twice as thick or more. The above-described printed matter is preferably imprinted on the face of said second layer away from the magnetic particle layer. The printed face of the second layer is overlaid with a third nonmagnetic layer which is preferably made of clear plastic and has a lesser thickness than the second layer. The second layer may be of single layer form or subdivided into multiple sublayer components. All of the above layers and sublayers are permanently bonded to each other.
The magnetic particle layer preferably comprises iron particles in a size range of 0.016 to 0.003 inches diameter of equivalent spheres or irregular shapes. This layer has sufficient density of particles that it has substantial areal continuity through side to side contacts between particles. It has been discovered that the ferromagnetic particle layer is protected from oxidation and consequent degradation of its ferro magnetic properties by the laminate construction and that sharp cutting edges are eliminated thereby consistent with obtaining the necessary magnetic attractable properties. The laminate as a whole is resistant to delamination.
These and other objects, features and advantages of the invention are described below in the following detailed description of preferred embodiments of the invention taken in connection with the accompanying drawing in which BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a plan view of a portion of a laminate sheet containing multiple symbol forming components therein; and
FIG. 2 is a sectional view of a thickness of such sheet viewed as indicated by arrows 2-2 in FIG. 1.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Referring now to the drawing and more particularly FIG. 1 thereof, there is shown a rigid sheet 10 comprising a number of distinct symbol forming patterns 12 which are defined by score lines 14. The sheet can be broken apart manually by bending so that the individual components 12 are separated at the score lines 14. Each component has a printed pattern 16 therein corresponding to the score line 14 outline. The pattern is spaced from the score line to define a B-pattem border 18 in the component. Buffer zones 20 are provided between adjacent components so that no score line is at a common such component defining edges of both components.
The sheet 10 is of large area form, at least one half inch by one half inch in length and width dimensions thereof and preferably in excess of 6 inches by 6 inches and may be of the order of 48 inches by 96 inches. The laminate thickness is between 30 and 60 mils, but may exceed these limits as required.
FIG. 2 shows an enlarged sectional view of a portion of the sheet 10. The laminated sheet comprises a layer 22 of ferromagnetic iron powder particles of single particle thickness or several thicknesses which has areal continuity by side to side contact of particles in the single layer thickness thereof. The ferromagnetic particle layer is sandwiched by a first plastic layer 24 and a second plastic or paper layer 26. The third plastic layer 28 overlies the second layer 26 forming an interface 30 therebetween. The first layer 24 and the third layer 28 are preferably clear rigid vinyl sheets. The second layer 26 is preferably an opaque single vinyl sheet or a permanently bonded plurality of rigid vinyl sublayers. Other plastics may be substituted for vinyl.
A matte surface 32 is provided on layer 24 to enhance its frictional contact with a display board. The smooth surface is provided on layer 28 to allow erasable writing thereon with a grease pencil or the like. The permanent pattern defining printed matter is contained at the interface 30 between layers 26 and 28 and is preferably imprinted on layer 26 or on its topmost sublayer.
A preferred fabrication process for making the laminated particle 10 is as follows.
Two 0.015 inches rigid, opaque vinyl sheets are laminated by subjecting them to heat and pressure at 120C. or higher and at least 5 psi for at least seconds to produce layer 26 as a laminate. Then one side of the so-formed laminate is printed with the patterns indicated in FIG. 1 or any other desired permanent information or representation or left blank. The other side of the laminate is sprayed with a plastic adhesive of heat reactivating type. Iron powder particles are applied thereto as a monolayer by flocking. The iron particles are then overlaid with a 0.0018 inches vinyl layer, and the vinyl layer/iron particle layer/vinyl layer is then hot pressed under the same conditions as described above in connection with bonding the sublayers of layer 26. Steel rule dies may be used to cut out the scoring patterns (FIG. ll), if scoring patterns are desired.
The iron particles are imbedded in the surface of the layer 26 by the hot pressing process, thereby allowing layer 24 to contact layer 26 for permanent bonding of the layers and encapsulation of the iron particles consistent with maintaining areal continuity of the magnetic particles by side-to-side contact of a substantial number (preferably a majority) thereof for purposes of assuring an adequate density of particles affording the necessary magnetic coercive force for attractability to a magnetic display board or device. Such attractability is further assured by using a very thin layer 24 to minimize separation of the iron particle layer from the board.
It is evident that variations can be made within the above described embodiments. For instance, the multiple sublayers of layer 26 can be made of paper instead of plastic. The individual symbol forming article components 12 (FIG. 1) can be precut rather than maintained together on a scored sheet.
The laminate can also be used as a display board, per se, in combination with symbol forming magnets.
There has been described a novel display board symbol forming article which is resistant to delamination, magnetic material oxidation in service and is simple, convenient and economical to fabricate and use. There are no sharp edges on the multiple symbol sheets or on individual symbol forming articles.
As used herein scoring includes conventional scoring or indentation or other marking forming an indicated site for cutting by punching, scissors, saw or other shear cutting means.
It is evident that those skilled in the art may now make numerous other uses and modifications of and departures from the specific embodiments described herein without departing from the inventive concepts. Consequently, the invention is to be construed as embracing each and every novel feature and novel combination of features present in or possessed by the apparatus and techniques herein disclosed and limited solely by the scope and spirit of the appended claims.
What is claimed is:
1. A magnetic display board article comprising means forming a thin planar layer of ferromagnetic particles of 0.016 to 0.003 inch diameter of one to four particle thicknesses,
and means forming first and second rigid planar nonmagnetic layers straddling the ferromagnetic particle layer and being permanently bonded thereto and to each other to form a permanent laminate,
at least one of said first and second layers having sufficient rigidity to impart rigidity to the article as a whole wherein said article is a sheet with areal length and width dimensions of at least one-half inches by one-half inches with enclosed area scored symbol patterns in at least one face thereof.
means forming a third nonmagnetic layer which is I transparent at least in part and overlies said thicker layer and is permanently bonded thereto on the face thereof away from said particle layer, and means defining printed matter at the interface of said third layer and the thicker one of said first two non-magnetic layers. 4. A magnetic display board article in accordance with claim 3 wherein said thicker layer is subdivided into sublayers which are permanently bonded to each other. 5. A magnetic display board article in accordance with claim 2 wherein said thicker layer is subdivided into sublayers which are permanently bonded to each other. 6. A magnetic display board article in accordance with claim 1 wherein said ferromagnetic particle layer has areal continuity through particle to particle contact in the plane of the layer. 7. A magnetic display board article in accordance with claim 1 wherein the article comprises a printed pattern of discrete outlines printed thereon and surrounded by closely spaced corresponding scoring patterns. 8. A magnetic display board article in accordance with claim 1 wherein the article has cut edges, finger handling areal dimensions and shape. 9. A magnetic display board article in accordance with claim 8 wherein the article is cut around a printed linear outline of a geometric design thereon with cut edges corresponding to and closely spaced to the outline. 10. A magnetic display board article in accordance with claim 1 as a display board.
11. A magnetic display board article in accordance with claim 1 as a symbol former movable on a display board.

Claims (11)

1. A magnetic display board article comprising means forming a thin planar layer of ferromagnetic particles of 0.016 to 0.003 inch diameter of one to four particle thicknesses, and means forming first and second rigid planar non-magnetic layers straddling the ferromagnetic particle layer and being permanently bonded thereto and to each other to form a permanent laminate, at least one of said first and second layers having sufficient rigidity to impart rigidity to the article as a whole wherein said article is a sheet with areal length and width dimensions of at least one-half inches by one-half inches with enclosed area scored symbol patterns in at least one face thereof.
2. A magnetic display board article in accordance with claim 1 wherein one of said nonmagnetic layers is thicker than the other.
3. A magnetic display board article in accordance with claim 2 and further comprising means forming a third nonmagnetic layer which is transparent at least in part and overlies said thicker layer and is permanently bonded thereto on the face thereof away from said particle layer, and means defining printed matter at the interface of said third layer and the thicker one of said first two non-magnetic layers.
4. A magnetic display board article in accordance with claim 3 wherein said thicker layer is subdivided inTo sublayers which are permanently bonded to each other.
5. A magnetic display board article in accordance with claim 2 wherein said thicker layer is subdivided into sublayers which are permanently bonded to each other.
6. A magnetic display board article in accordance with claim 1 wherein said ferromagnetic particle layer has areal continuity through particle to particle contact in the plane of the layer.
7. A magnetic display board article in accordance with claim 1 wherein the article comprises a printed pattern of discrete outlines printed thereon and surrounded by closely spaced corresponding scoring patterns.
8. A magnetic display board article in accordance with claim 1 wherein the article has cut edges, finger handling areal dimensions and shape.
9. A magnetic display board article in accordance with claim 8 wherein the article is cut around a printed linear outline of a geometric design thereon with cut edges corresponding to and closely spaced to the outline.
10. A magnetic display board article in accordance with claim 1 as a display board.
11. A magnetic display board article in accordance with claim 1 as a symbol former movable on a display board.
US00360816A 1973-05-16 1973-05-16 Magnetic display board symbols Expired - Lifetime US3839130A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00360816A US3839130A (en) 1973-05-16 1973-05-16 Magnetic display board symbols
FR7403035A FR2230032A1 (en) 1973-05-16 1974-01-30
CA193,003A CA1027359A (en) 1973-05-16 1974-02-20 Magnetic display board symbols
JP49022467A JPS5011598A (en) 1973-05-16 1974-02-27
NL7405678A NL7405678A (en) 1973-05-16 1974-04-26
BR3869/74A BR7403869D0 (en) 1973-05-16 1974-05-13 MAGNETIC VISUAL DISPLAY PANEL ARTICLE
IT51038/74A IT1011428B (en) 1973-05-16 1974-05-16 MAGNETIC VISUAL PRESENTATION DEVICE
DE2423907A DE2423907A1 (en) 1973-05-16 1974-05-16 MAGNETIC DISPLAY ELEMENT

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US00360816A US3839130A (en) 1973-05-16 1973-05-16 Magnetic display board symbols

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US3839130A true US3839130A (en) 1974-10-01

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US00360816A Expired - Lifetime US3839130A (en) 1973-05-16 1973-05-16 Magnetic display board symbols

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US (1) US3839130A (en)
JP (1) JPS5011598A (en)
BR (1) BR7403869D0 (en)
CA (1) CA1027359A (en)
DE (1) DE2423907A1 (en)
FR (1) FR2230032A1 (en)
IT (1) IT1011428B (en)
NL (1) NL7405678A (en)

Cited By (17)

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US4063369A (en) * 1975-12-15 1977-12-20 Mary Louise Hart Visual communication tool for children
US4125653A (en) * 1977-01-31 1978-11-14 Muzik Glenn M Graphic laminate and method of making same
US4489513A (en) * 1982-11-24 1984-12-25 Reiner Jack L Multiplex sign indicia
WO1985000456A1 (en) * 1983-07-05 1985-01-31 Mark Andrew Stemm Systems analysis board
WO1985000528A1 (en) * 1983-07-21 1985-02-14 Neil Shields Roberts Game set and board
US4584223A (en) * 1984-06-20 1986-04-22 Krapf Wallace A Magnetic display panels
US4663874A (en) * 1984-02-24 1987-05-12 C. I. Kaseo Co., Ltd. Magnetically attachable sign
FR2610437A1 (en) * 1987-02-02 1988-08-05 Kjan Alain Magnetic sandwich panels
US5452508A (en) * 1993-04-14 1995-09-26 Wu; Michael Method for manufacturing surface three-dimensional figures on magnetic material
US5503891A (en) * 1994-10-25 1996-04-02 Marflex International Inc. Flexible magnet attractant display mat
US5993218A (en) * 1996-10-07 1999-11-30 Magnetic Poetry, Inc. Multi-sided word kit
US6010338A (en) * 1996-11-29 2000-01-04 Watson; Kelly H. Magnetic frame kit
US6153280A (en) * 1998-06-08 2000-11-28 Magnet, Llc Perforated magnetic card
US6347469B1 (en) 2000-03-22 2002-02-19 Magnet Llc Magnetic message display and method of selectively framing messages of same
WO2003015879A2 (en) * 2001-08-20 2003-02-27 Da Tseng Ferro-sticker
US20050241197A1 (en) * 2004-04-30 2005-11-03 Acco Brands, Inc. Message board assembly
US20070099159A1 (en) * 2005-10-31 2007-05-03 Karin Valencia Foreign language instructional aid

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DE2756571C3 (en) * 1977-12-19 1981-04-16 Walter 7800 Freiburg Barner Adhesive plate
DE3209797C1 (en) * 1982-03-18 1983-10-27 magnetoplan GmbH, 6200 Wiesbaden Attaching plate, in particular a writing support
JP2000321987A (en) * 1999-05-06 2000-11-24 Plan R:Kk Color scheme examination method, color scheme examination implement and system for color scheme examination
JP5556314B2 (en) * 2010-04-02 2014-07-23 セイコーエプソン株式会社 Print medium, wristband, and method for creating wristband

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US2002077A (en) * 1933-03-24 1935-05-21 Thomas H Darling Magnetic puzzle
GB842480A (en) * 1956-11-15 1960-07-27 Holtz Hermann A chart for statistical and like purposes
US3122684A (en) * 1961-08-10 1964-02-25 Child Guidance Toys Inc Magnetized game board configurations
US3189981A (en) * 1961-05-25 1965-06-22 Child Guidance Toys Inc Method of assembling magnetized rubber-like strips in plastic configurations

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US2002077A (en) * 1933-03-24 1935-05-21 Thomas H Darling Magnetic puzzle
GB842480A (en) * 1956-11-15 1960-07-27 Holtz Hermann A chart for statistical and like purposes
US3189981A (en) * 1961-05-25 1965-06-22 Child Guidance Toys Inc Method of assembling magnetized rubber-like strips in plastic configurations
US3122684A (en) * 1961-08-10 1964-02-25 Child Guidance Toys Inc Magnetized game board configurations

Cited By (19)

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US4063369A (en) * 1975-12-15 1977-12-20 Mary Louise Hart Visual communication tool for children
US4125653A (en) * 1977-01-31 1978-11-14 Muzik Glenn M Graphic laminate and method of making same
US4489513A (en) * 1982-11-24 1984-12-25 Reiner Jack L Multiplex sign indicia
WO1985000456A1 (en) * 1983-07-05 1985-01-31 Mark Andrew Stemm Systems analysis board
WO1985000528A1 (en) * 1983-07-21 1985-02-14 Neil Shields Roberts Game set and board
US4663874A (en) * 1984-02-24 1987-05-12 C. I. Kaseo Co., Ltd. Magnetically attachable sign
US4584223A (en) * 1984-06-20 1986-04-22 Krapf Wallace A Magnetic display panels
FR2610437A1 (en) * 1987-02-02 1988-08-05 Kjan Alain Magnetic sandwich panels
US5452508A (en) * 1993-04-14 1995-09-26 Wu; Michael Method for manufacturing surface three-dimensional figures on magnetic material
US5503891A (en) * 1994-10-25 1996-04-02 Marflex International Inc. Flexible magnet attractant display mat
US5993218A (en) * 1996-10-07 1999-11-30 Magnetic Poetry, Inc. Multi-sided word kit
US6010338A (en) * 1996-11-29 2000-01-04 Watson; Kelly H. Magnetic frame kit
US6153280A (en) * 1998-06-08 2000-11-28 Magnet, Llc Perforated magnetic card
US6347469B1 (en) 2000-03-22 2002-02-19 Magnet Llc Magnetic message display and method of selectively framing messages of same
WO2003015879A2 (en) * 2001-08-20 2003-02-27 Da Tseng Ferro-sticker
WO2003015879A3 (en) * 2001-08-20 2004-03-18 Da Tseng Ferro-sticker
US20050241197A1 (en) * 2004-04-30 2005-11-03 Acco Brands, Inc. Message board assembly
US7246458B2 (en) * 2004-04-30 2007-07-24 Acco Brands Usa Llc Message board assembly
US20070099159A1 (en) * 2005-10-31 2007-05-03 Karin Valencia Foreign language instructional aid

Also Published As

Publication number Publication date
CA1027359A (en) 1978-03-07
IT1011428B (en) 1977-01-20
DE2423907A1 (en) 1974-12-05
NL7405678A (en) 1974-11-19
FR2230032A1 (en) 1974-12-13
JPS5011598A (en) 1975-02-06
BR7403869D0 (en) 1974-12-31

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