ITEM SCHEDULING SYSTEM AND APPARATUS THEREFOR

摘要

A film scheduling or booking system is provided in which pre-punched zip sets are employed for film selection and are compared with a master film card to determine whether the requested date is available. The requested date is then marked on the film card in an area arranged as a 365-day calendar. The marked areas on the master film card are optically scanned and both the master film card and the zip set are punched in the marked areas, all in the same operation. The master film card is provided with a reference area ahead of the calendar area and the output of the twelve channels of the optical scanning circuits are all automatically set to a fixed reference level so that thermal drift or saturation of the sensing devices in either the plus or minus direction does not produce improper punching.