Patent ID: 8100328

Claim:
A data processing apparatus for IC tags comprising: a reader/writer which reads and/or writes electronic information from/to IC tags which are mounted on a conveying medium and conveyed in a given direction, the IC tags each having a storage device and a wireless transceiver; an antenna of the reader/writer for radio communication between said reader/writer and an IC tag, wherein said antenna is set skew at a predetermined angle to the direction in which the IC tags move and said reader/writer reads and/or writes electronic information by radio communication from/to each of said IC tags mounted on the conveying medium sequentially; an antenna adjuster which adjusts the skew angle of said antenna; and a controller which determines the angle of the antenna to the direction in which the IC tags move, based on information about the arrangement of the IC tags mounted on said conveying medium, and works said antenna adjuster to set the antenna skew at said angle.