Patent ID: 6450401
Filing Date: 2002-09-17
Classification: B43L

Abstract:
A writing board with an electronic calculator comprising:a case member including a frame defining an opening in a top surface of said case member; a recording sheet including a microcapsule magnetic sheet disposed in said case member with a top face of said recording sheet exposed through said opening of said case member; a magnetized member for writing on said recording sheet; a magnetized erasing sheet positioned under said recording sheet in parallel with said recording sheet; an erasing button provided in said case member; an electronic calculator disposed on said top surface of said case member; a driving device powered by a motor and connected to said erasing sheet; said driving device being adapted to drive said erasing sheet to produce a reciprocating movement in said erasing sheet maintaining said erasing sheet substantially in parallel with said recording sheet, from a first position wherein said erasing sheet is away from said recording sheet so that said erasing sheet does not magnetically affect and erase writings on said recording sheet, to a second position wherein said erasing sheet is close enough to said recording sheet so that said erasing sheet magnetically affects to erase the writings on said recording sheet, said driving device being provided with a switching device which is adapted to be turned on by depressing said erasing button.