Title:
ELECTRONIC BLACKBOARD
Document Type and Number:
Japanese Patent JPH054484
Kind Code:
A
Abstract:
PURPOSE: To easily put down a desired straight line on a blackboard.
CONSTITUTION: A support board 17 is provided to retain a screen sheet on which to write with a writing instrument from its rear side, a plurality of projecting or grooved writing instrument guides 18 are formed on the support board 17 as in the form of straight lines and the writing instrument is brought into contact with the writing instrument guide 18 formed on the support board 17 from above the screen sheet to be guided along the writing instrument guide 18 in a linear form, thereby drawing a straight line at ease.
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Inventors:
BUGIYAMA ISATO
OGASAWARA TSUTOMU
OGASAWARA TSUTOMU
Application Number:
JP15425091A
Publication Date:
January 14, 1993
Filing Date:
June 26, 1991
Export Citation:
Assignee:
RICOH KK
International Classes:
B43L1/04; H04N1/00; (IPC1-7): B43L1/04; H04N1/00
Attorney, Agent or Firm:
Akira Kashiwagi
Next Patent: PLOTTER CAPABLE OF OUTPUTTING ARBITRARY RANGE