A self-service check-out counter for cashier-unattended use and operation includes an laser scanner for automated reading of product identification codes borne by articles to be purchased, a keyboard for manual entry of article-identifying information, a variety of indicators and signalling devices for...http://www.google.com.tw/patents/US4909356?utm_source=gb-gplus-share專利 US4909356 - Fully self-service check-out counter incorporating an integral apparatus for on demand manufacturing of custom-sized bags conforming to the volume of articles received therein
