CLASSBOARD Russian patent published in 1996 - IPC

FIELD: educational equipment, in particular, registering of information on classboard by chalk. SUBSTANCE: classboard has panel outlined by profiling members at all its sides, panlike members and paper holder. Vertical U-shaped profiling members are provided with pair of longitudinal protrusions and horizontal H-shaped profiled members are provided with two pairs of longitudinal projections positioned at opposite ends of profiled member for retaining panlike member or paper holder on panel. When classboard is used, chalk dust is accumulated in panlike members. Shape of horizontal members provides retaining of panlike member and paper holder on panel without using auxiliary retaining parts. EFFECT: increased convenience in usage, enhanced reliability in operation. 3 cl, 4 dwg