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US 3,943,643 AGranted
Pneumatically cleared toy slate
AssigneeScott-Fisher Development Company
InventorsJohn B. Fisher, Donald W. Scott
Life of this patent
Estimating the term…
Abstract
A toy slate of the type that has a wax coated dark slate board, a flexible milky translucent film over the slate board and a relatively impression proof transparent plastic cover layer is provided with a means for forcing a blast of air between the wax covered slate board and the translucent plastic layer thereabove to separate such layer from the slate board and clear the toy slate.
Claims10
A toy slate comprising
- a laminated slate means including a slate board, and a transparent plastic cover sheet having a translucent milky layer thereunder;
- and
- a bellows means operatively connected to the slate means between the slate board and the adjacent layer so that a sudden compressive force applied to the bellows means forces a blast of air to flow between the slate board and the layer to separate the layer from the slate board and erase any marking appearing on the slate means.
A toy slate comprising a carrier board;
- a slate means including a wax coated paper slate board, a translucent flexible plastic film layer extending over the slate board, and a transparent relatively hard plastic cover sheet covering the plastic film layer secured to the carrier board;
- a porous resilient foam block;
- and
- a flexible bag receiving the foam block therein, the bag including a mouth opening, which bag is secured to the slate means and extends a short distance thereinto from one margin thereof with the mouth opening being between the slate board and the adjacent film layer.
1 more element
Dependencies are inferred from the claim text.