Patent ID: 8010409

Claim:
An article sales data processing apparatus comprising: a tag antenna plate that receives signals transmitted from electronic tags associated with a plurality of articles; an electronic tag reader that reads electronic tag data stored in each of said electronic tags existing within a communication range of the tag antenna plate, through the signals transmitted from said plurality of electronic tags; an electronic tag data storage section that stores electronic tag data read by the electronic tag reader; an article item storage section that stores article sales data; determination means for determining whether the same data as electronic tag data read from the electronic tag using the electronic tag reader is stored in the electronic tag data storage section; electronic tag data processing means for adding the electronic tag data read from the electronic tag to the electronic tag data storage section in the case where the determination means determines that the same data is not stored, while not adding the electronic tag data read from the electronic tag to the electronic tag data storage section in the case where the determination means determines that the same data is stored; mode switching means for switching an operating mode between an input mode and a cancel mode; article sales data addition means for adding, when electronic tag data is added to the electronic tag data storage section by the electronic tag data processing means in a state where the input mode is selected, the article sales data acquired based on the electronic tag data to the article item storage section; electronic tag data clear means for clearing all electronic tag data stored in the electronic tag data storage section and not clearing article sales data stored in the article item storage section when the operating mode is switched from the input mode to cancel mode before termination of one transaction; article sales data cancel means for deleting the article sales data acquired from electronic tag data from the article item storage section when the electronic tag data is added to the electronic tag data storage section by the electronic tag data processing means in a state where the cancel mode is selected; transaction termination processing means for performing termination processing of one transaction based on the article sales data stored in the article item storage section when the termination of that one transaction is declared; and article sales data clear means for clearing the article sales data stored in the article item storage section after the transaction termination processing is performed by the transaction termination processing means while the data in the electronic tag data storage section is maintained.