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US 4,051,609 AGranted
Method of making reusable writing board and the product thereof
OwnerThomas P. Boursawinventor
Life of this patent
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OwnerThomas P. Boursawinventor
Estimating the term…
A reusable writing board of "slate board" is both improved and of lower cost, avoiding use of the usual separate black-cardboard piece stapled to a backing. In a single printing operation, which is needed for face-printing anyway, the "slate" or background surface is provided on the same piece of paperboard. After further machine steps, a final operation of gluing and folding produces the finished slate board with a decoratively-printed head panel glued to extend down protectively over the top edge of the plastic work sheet covering the printed background. If desired, educational or informative discs can be rotatably secured under the head fold. Also, if desired, an air pocket can be formed under the head fold such that after writing by impressions through the work sheet, a sudden slap on the cover of the air pocket will raise the work sheet pneumatically to erase the writing.
A reusable pressure-sensitive writing board of the type having cover sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereon and to then show, until reloosened, a contrast between the clinging area and the nonclinging area, characterized by being formed, except for its cover sheet means, essentially from a single sheet of cardboard folded and including a back portion, a flap folded forwardly therefrom and down thereover and including on the forward face thereof a printed background with a pressure-tacky surface;
A method of making a pressure-sensitive reusable writing board of the type having cover sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereon and to then show, until loosened, a contrast between the clinging area and the nonclinging area, characterized by:
A method of making a pressure-sensitive reusable writing board of the type having cover sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereon and to then show, until loosened, a contrast between the clinging area and the nonclinging area, characterized by:
A method of making a pressure-sensitive reusable writing board of the type having cover sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereon and to then show, until loosened, a contrast between the clinging area and the nonclinging area, characterized by;
A method of making a pressure-sensitive reusable writing board of the type having cove sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereof and to then show, until loosened, a contrast between the clinging area and the nonclinging area, characterized by:
A method of making a pressure-sensitive reusable writing board of the type having cover sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereon and to then show, until loosened, a contrast between the clinging area and the nonclinging area, characterized by:
A reusable pressure-sensitive writing board of the type having cover sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereon and to then show, until reloosened, a contrast between the clinging area and the nonclinging area, characterized by being formed, except for its cover sheet means, essentially from a single sheet of carboard folded and including a back portion, a flap folded forwardly therefrom and down thereover and including on the forward face thereof a clay-coated surface bearing a printed background with a pressure-tacky surface;
A reusable pressure-sensitive writing board of the type having cover sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereon and to then show, until reloosened, a contrast between the clinging area and the nonclinging area, characterized by being formed, except for its cover sheet means, essentially from a single sheet of cardboard folded and including a back portion, a flap folded forwardly therefrom and down thereover and including on the forward face thereof a printed background with a pressure-tacky surface, and having its rear face area adhered to the backing, generally throughout the writing area, for stiffness;
A method of making a pressure-sensitive reusable writing board of the type having cover sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereon and to then show, until loosened, a contrast between the clinging area and the nonclinging area, characterized by printing on one face of a sheet of cardboard the background for the writing surface and in other areas such face-printing as is desired, providing a pressure-tacky surface for the printed background, adhering a narrow portion of the cover sheet means to the cardboard in such position that the cover sheet means will lie over the background;
A method of making a pressure-sensitive reusable writing board of the type having cover sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereon and to then show, until loosened, a contrast between the clinging area and the nonclinging area, characterized by:
A reusable pressure-sensitive writing board of the type having cover sheet means overlying a background, initially loosely, adapted to cling to the background where impressed thereon and to then show, until reloosened, a contrast between the clinging area and the nonclinging area, characterized by having its background formed of a sheet of cardboard having a clay-coated surface bearing a printed background with a pressure-tacky surface.
Dependencies are inferred from the claim text.