Appeal No. 1997-1379
Application 08/194,748
wherein said status detector comprising [sic] first
detector means for detecting the presence of product on
the station conveyor means,
wherein said system further comprising [sic] second
detector means for detecting the presence of product
unloaded onto the station conveyor means from the
carrier,
wherein said means for controlling comprising [sic]
collision avoidance means for avoiding collision of
products by preventing the unloading of products onto the
station conveyor means by the carrier responsive to
detection by said first detector means, and
wherein said first communication means comprises:
first and second light emitting elements
provided on the carrier and producing an unloading
request signal and a loading request signal,
respectively;
first and second light sensing elements provided
on the station conveyor means and receiving said
unloading request signal and loading request signal,
respectively;
a third light emitting element provided on the
station conveyor means and producing an unloading OK
signal in accordance with said unloading request signal
when there is no product on the station conveyor means;
a fourth light emitting element provided on the
station conveyor means and producing a loading OK signal
in accordance with said loading request signal when the
presence of product has been detected by the first
detector means and the presence of unloaded product not
detected by the second detector means; and
third and fourth light sensing elements provided
on the carrier and receiving said unloading OK signals
and loading OK signal, respectively.
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