Reusable data card for constant and variable data - using magnetic fixed data storage and optical erasable storage

摘要

A repeatedly usable card for constant and variable data is designed for data handling processes. Constant and variable data are stored on a card suitable for automatic readers so that the variable data can be erased. Fixed data is stored on a magnetic strip for automatic reading and recorded parallel to the strip for visual reading. Variable data is manually recorded as optically read markings or typescript for automatic reading and is both manually and automatically erasable by physical or chemical processes.