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WO1993015918A1 - Planche a dessin thermographique - Google Patents

Planche a dessin thermographique Download PDF

Info

Publication number
WO1993015918A1
WO1993015918A1 PCT/US1993/000186 US9300186W WO9315918A1 WO 1993015918 A1 WO1993015918 A1 WO 1993015918A1 US 9300186 W US9300186 W US 9300186W WO 9315918 A1 WO9315918 A1 WO 9315918A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
drawing device
thermographic
generally
set forth
Prior art date
Application number
PCT/US1993/000186
Other languages
English (en)
Inventor
John N. Handy
Original Assignee
Mattel, Inc.
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 Mattel, Inc. filed Critical Mattel, Inc.
Publication of WO1993015918A1 publication Critical patent/WO1993015918A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00—Repeatedly-usable boards or tablets for writing or drawing

Definitions

  • This invention relates generally to drawing and recording apparatus and particularly to such devices intended to be erasable and capable of repeated use.
  • U.S. Patent 4,212,393 issued to Lenkof sets forth MAGIC PICTURES in which pictures consist of printed papers having various figures outlined therein in a dark color such as black. The space within the outlines is printed with a uniform water soluble ink distribution including one or more latent water soluble coloring materials printed in a dot-like pattern. When the insoluble imprints of ink are contacted by a water bearing felt tip pen, the coloring material is released producing a colored area on the paper.
  • U.S. Patent 4,176,273 issued to Fujie, et al. sets forth a LIGHT AND HEAT WRITING PEN FOR PHOTOSENSITIVE MATERIAL utilized in developing photoconductive material.
  • the pen includes an elongated cylindrical housing supporting a nib formed of a material of high thermal conductivity and pervious to light.
  • the pen further includes a battery powered light source for illuminating the photosensitive material through the nib and a heater embedded within the nib coupled to the battery power source for elevating the nib temperature.
  • U.S. Patent 3,235,706 issued to Newmann, et al. sets forth a ELECTRICALLY HEATED DRAWING INSTRUMENT having an elongated generally cylindrical housing supporting an electric heating element together with a conventional lightbulb.
  • the lightbulb and heating element are coupled to a source of conventional electric power.
  • a flexibly mounted support member is adapted to receive a meltable marker such as a wax crayon in proximity to the heating element.
  • the marker holder may be flexibly moved to a position in which the meltable marker or crayon is contacted by the heating element and caused to melt and flow for deposit upon a paper or other recording surface.
  • thermographic layer 21 is the provision of a layer of material which is visually distinguishable from the color or other optical characteristic of thermographic layer 22.
  • Thermographic layer 22 is supported upon color layer 21 and, in its preferred form, comprises a thermographic paint material having a light transmissive characteristic which changes in response to temperature changes.
  • Thermographic paints of the character useful for thermographic layer 22 are well known in the art and may, for example, comprise the thermochromic paint sold by Matsui Shikiso Chemical Company, Ltd., Kyoto, Japan, under the trademark Chromic Epoxy Spray Paint. It will be apparent to those skilled in the art, however, that a variety of thermographic or thermochromic material may be utilized to form thermographic layer 22 with the essential feature being the presentation of a generally opaque characteristic or a more light transmissive characteristic depending upon the material temperature.
  • the heating action provided by nib 52 upon the contacted area of thermographic layer 22 provides a localized heating thereof and thus causes thermographic layer 22 to assume the above-described light transmissive characteristic thereby exposing a portion of color layer 21 through the thermographic layer.
  • nib 52 and pin 50 have been moved by user hand 60 across thermographic layer 22 to create a plurality of drawn objects 45, 46 and 47 which, for purposes of example, are configured to generally represent fanciful depictions of flowers or the like.
  • the important characteristic of objects 45, 46 and 47 is their formation due to the localized heating of thermographic layer 22 to produce transparent or light transmissive image objects.
  • the underlying colored elements of color layer 21 are therefore exposed and cause objects 45, 46 and 47 to assume a brightly colored appearance against the dark background of the remainder of thermographic layer 22.
  • image object 46 reveals a plurality of colored areas 36, 37 and 38 while image object 47 reveals a plurality of colored areas 39, 40 and 41 and thus appear in their preferred form as brightly colored objects.
  • the user is, of course, free to sketch virtually any pattern or image objects upon thermographic layer 22. At some point, it will be desirable to restore thermographic layer 22 to its previously dark background configuration over some or all of the area within recess 15. To produce this erasing action, an eraser generally referenced by numeral 70 is provided.
  • Eraser 70 comprises a hollow housing 71 having an interior cavity 75 (better seen in Figure 4) and further defining a pad 72 and a cap 73.
  • eraser 70 is intended to receive a quantity of liquids such as water having a substantially cooler temperature than the thermographic transition temperature of thermographic layer 22.
  • eraser 70 having a quantity of cooled liquid or the like received therein is placed in contact with the to-be- erased portion of thermographic layer 22 such that pad 72 communicates with layer 22.
  • thermographic drawing device utilizes a thermographic material which facilitates a clear characteristic in response to higher temperature and an opaque characteristic under lower temperature
  • pen 50 may accommodate a cooling apparatus while eraser 70 accommodates a heating apparatus.
  • Figure 2 sets forth a section view of drawing device 10 taken along section lines 2-2 in Figure 1.
  • Drawing device 10 includes a molded plastic housing 11 defining a palette recess 15 and a generally planar palette surface 20. Housing 11 further defines an elongated pen recess 17 for receiving a pen 50 shown in dashed-line representation.
  • a plurality of elongated support ribs 27 extend beneath palette surface 20 and are integrally formed with housing 11. Support ribs 27 provide additional support for palette surface 20 to absorb the writing pressure and similar forces against palette surface 20 anticipated by a typical user.
  • Housing 11 further defines a plurality of closed end bosses such as bosses 23 and 24 which, in their preferred form, are spaced about the periphery of palette recess 15.
  • a palette frame 18 is configured to be received within palette recess 15 and includes a corresponding plurality of cylindrical posts such as posts 25 and 26.
  • Posts 25 and 26 are received within bosses 23 and 24 respectively of housing 11 and cooperate therewith to secure palette frame 18 within recess 15.
  • housing 11 defines a plurality of bosses such as bosses 23 and 24 spaced about the periphery of palette recess 15.
  • palette frame 18 defines a corresponding plurality of cylindrical posts such as posts 25 and 26 to be received within such bosses and to cooperate therewith to secure and maintain palette frame 18 within palette recess 15.
  • a color layer 21 extends across and preferably covers palette surface 20.
  • a thermographic material layer 22 is received upon and supported by color layer 21 in the manner described above.
  • housing 11 including sidewall 14, palette surface 20 and support ribs 27 together with the above-mentioned bosses such as bosses 23 and 24 are formed of a single integral molded plastic unit.
  • FIG. 3 sets forth a section view of pen 50 taken along section lines 3-3 in Figure 1.
  • Pen 50 includes a generally cylindrical housing 51 forming a cylindrical interior battery cavity 55 extending therethrough.
  • a domed-shaped end cap 53 is received upon and secured to housing 5 . 1 by use of a conventional snap-fitting attachment.
  • Housing 51 further defines an elongated slot 66 which receives a conventional switch button 54 which in turn is supported by a conventional slide switch 49 received within cavity 55.
  • switch button 54 is slidably movable within slot 66 to operate conventional switch 49.
  • a generally disk-shaped contact support 58 is received and supported within end cap 53.
  • a coiled spring contact 59 is secured to and supported by contact support 58.
  • Contact support 58 and spring contact 59 are removable from cylindrical housing 51 with the removal of end cap 53.
  • a pair of conventional batteries 56 and 57 are received within battery cavity 55 and provide a source of electrical power for pen 50.
  • Housing 51 further supports a generally frusto- conical nib shroud 62 in a conventional attachment.
  • Shroud 62 further defines an aperture 63 near the apex portion thereof.
  • a nib 52 is received within shroud 62 and extends through aperture 63.
  • a nib support 61 is received within shroud 62 and cavity 55 and defines a generally annular member which in turn receives and supports nib 52.
  • An electrical contact 64 is received within nib support 61 and is maintained in electrical connection with the enclosed heating element within nib 52 (not shown) .
  • nib 52 in accordance with conventional fabrication techniques supports an internal heating element which in response to the application of electrical power produces a heating action and elevates the temperature of nib 52.
  • cylindrical housing 51, end cap 53, and nib shroud 62 are formed of molded plastic materials or the like in accordance with conventional plastic molding processes.
  • the user manipulates switch button 54 to close switch 49 and complete the above-mentioned conventional electrical circuit which causes the electrical energy within batteries 56 and 57 to heat nib 52 to a sufficient temperature to produce the above- described local heating of portions of thermographic layer 22 which the user touches in the drawing process shown in Figure 1.
  • switch 49 is returned to the off position interrupting the flow of electrical power to nib 52 and conserving the electrical energy within batteries 56 and 57.
  • thermographic layer 22 drawing device 10 may be operated in response to the heat produced by the user's fingers or hand to provide a "finger painting" type activity.
  • Figure 4 sets forth a section view of eraser 70 taken along section lines 4-4 in Figure 1.
  • eraser 70 includes a housing 71 defining an upwardly extending generally cylindrical neck 74 which in turn defines a cylindrical neck passage 79. Housing 71 further defines a peripheral lip 76 which in turn defines an internal groove 77 on the interior portion thereof.
  • Eraser 70 further includes a thin walled pad member 72 which includes a generally planar lower surface 70 together with an outwardly extending lip 78.
  • lip 78 is received within groove 77 to position surface 80 in a downwardly extending position and to complete an interior cavity 75 within the combination of housing 71 and pad 72.
  • the attachment between lip 78 and housing 71 within groove 77 is, to a large extent, a matter of design choice and may, for example, utilize conventional sonic welding, adhesive attachment, or a precise snap- fit.
  • the essential quality of the assembly of pad 72 to housing 71 is the provision of a liquid- tight seal therebetween whereby cavity 75 forms a liquid- tight reservoir within eraser 70 which is completely sealed with the exception of neck passage 79.
  • a sealing cap 73 is received upon and securable to neck 74 by a conventional attachment such as snap-fitting or the like.
  • a conventional threaded attachment is shown between neck 74 and cap 73.
  • interior cavity 75 is partially filled with a quantity of water 81.
  • a pair of ice cubes 82 and 83 are received within interior cavity 75 and are utilized to cool water 81.
  • the cooling action of water 81 operates upon pad 72 to cool surface 80 to a sufficiently low temperature to reverse the heating process which the user applied to thermographic material layer 22 (seen in Figure 1) to form drawn objects 45 through 47 as described above.
  • eraser 70 is, in accordance with user choice, placed upon and held in contact with all or part of thermographic layer 22 to produce cooling thereof.
  • the cooling action of eraser 70 upon the contacted areas of thermographic layer 22 reverses the thermochromic action of layer 22 and restores it to its darkened opaque characteristic producing the apparent "erasure" of image objects previously drawn upon drawing device 10.

Landscapes

  • Toys (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

Planche à dessin thermographique (10) comprenant un boîtier (11) en plastique moulé de forme générale plane qui, à son tour, définit une surface en panneu encastré de forme générale plane (20). La surface du panneau supporte une couche de matériau (21) de préférence coloré, sur laquelle est formée une couche de revêtement (22) de matériau thermochrome ou thermographique. Selon le mode de réalisation préféré, le matériau thermographique généralement foncé est opaque à faible température et acquiert une configuration transmettant la lumière ou transparente lorsqu'il atteint des températures plus élevées. Afin d'obtenir un essai de dessin superposé, un stylo chauffé permet à l'utilisateur de chauffer localement des parties du revêtement thermographique de manière à provoquer sa conversion vers une configuration transmettant la lumière ou transparente, ce qui a pour effet d'exposer la couche colorée inférieure et de donner l'apparence d'objets dessinés aux couleurs vives. De plus, un dispositif d'effacement (70) possédant une partie creuse interne (75) destiné à recevoir du liquide frais fonctionne par refroidissement de la couche thermographique, rétablissant le matériau thermographique dans sa configuration foncée, ce qui obscurcit la zone colorée inférieure.
PCT/US1993/000186 1992-02-07 1993-01-11 Planche a dessin thermographique WO1993015918A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US83225992A 1992-02-07 1992-02-07
US07/832,259 1992-02-07

Publications (1)

Publication Number Publication Date
WO1993015918A1 true WO1993015918A1 (fr) 1993-08-19

Family

ID=25261141

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/000186 WO1993015918A1 (fr) 1992-02-07 1993-01-11 Planche a dessin thermographique

Country Status (3)

Country Link
AU (1) AU3440493A (fr)
MX (1) MX9300571A (fr)
WO (1) WO1993015918A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474312A (en) * 1946-09-21 1949-06-28 Polychrome Corp Stylus
US3443312A (en) * 1962-06-04 1969-05-13 Hitachi Ltd Method of making gas-filled enclosed switchgear with copper contacts
US3689937A (en) * 1970-11-09 1972-09-05 Evershed Vignoles Ltd Recording styli and control circuits for styli
US4139965A (en) * 1977-09-12 1979-02-20 Mattel, Inc. Device using coated paper and chemical reactive marker
US4176273A (en) * 1976-10-19 1979-11-27 Olympus Optical Company Limited Light and heat writing pen for photosensitive material
US4590381A (en) * 1985-06-13 1986-05-20 Pineapple Industries, Inc. Phosphorescent marking system
US4633436A (en) * 1983-12-16 1986-12-30 International Business Machines Corp. Real-time rub-out erase for an electronic handwriting facility

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474312A (en) * 1946-09-21 1949-06-28 Polychrome Corp Stylus
US3443312A (en) * 1962-06-04 1969-05-13 Hitachi Ltd Method of making gas-filled enclosed switchgear with copper contacts
US3689937A (en) * 1970-11-09 1972-09-05 Evershed Vignoles Ltd Recording styli and control circuits for styli
US4176273A (en) * 1976-10-19 1979-11-27 Olympus Optical Company Limited Light and heat writing pen for photosensitive material
US4139965A (en) * 1977-09-12 1979-02-20 Mattel, Inc. Device using coated paper and chemical reactive marker
US4633436A (en) * 1983-12-16 1986-12-30 International Business Machines Corp. Real-time rub-out erase for an electronic handwriting facility
US4590381A (en) * 1985-06-13 1986-05-20 Pineapple Industries, Inc. Phosphorescent marking system

Also Published As

Publication number Publication date
AU3440493A (en) 1993-09-03
MX9300571A (es) 1993-09-01

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