A check-out device includes a scanner for reading an article code fixed to an article, an entry conveyor for conveying the article after reading the article code, a weigh scale for measuring weight of an article on the entry conveyor to produce measured weight data, a RAM for storing article data of...http://www.google.com/patents/US6315199?utm_source=gb-gplus-sharePatent US6315199 - Self-service check-out device with checking of articles before enabling sales process of articles
