Poster display unit

Details Poster display unit Poster display unit

G - Physics

09

F

G09F 11/00 (2006.01) G09F 11/26 (2006.01) G09F 11/29 (2006.01)

Patent

CA 2312093

There is disclosed a poster display unit which comprises two photoelectric sensors respectively for poster indexing and poster advancement and a programmable logic controller for reading the two sensors.

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