ES237618U - Perfected slate. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improved slate, of the type comprising a writing surface composed of three overlapping sheets, the lower one of which has the contact surface with the intermediate impregnated with a soft material, in such a way that a pointed element applied on the external sheet, transparent, establishes the unión through the sections produced, between the lower and intermediate sheets, seeing through the upper sheet said sections or signs, which disappear by sliding a strip between those lower and intermediate sheets that separate them, being the set of sheets arranged in a frame, closed by the back face that serves as a support to produce the writing, characterized essentially by the fact that the strip is occluded between the lower and intermediate sheets, has its ends coupled to a piece- bridge, which is on the upper outer face of the slate, and has its ends occluded inside the p aredes of the frame, said ends having two extensions, transverse to the bridge piece and parallel to two opposite sides of the frame, sliding inside them which, for this purpose, have longitudinal guiding holes; the bridge piece is provided on the upper side of two projections in the form of parallel hooks, which, in the movement of the bridge piece towards a third side of the frame, coincides with the position of a tubular projection provided therein, throughout from which the writer element is positioned, passing through the hooks, fixing the position of the bridge piece (Machine-translation by Google Translate, not legally binding)