发明授权
US3986612A Random access card storage and retrieval system 失效
随机存取存储和检索系统

Random access card storage and retrieval system
摘要:
Apparatus for transferring a designated card or card-like article such as a microfiche into or out of a stack of similar cards by producing a separation in the stack at a selected location with a stream of air and moving the designated card into or out of the separation with a vacuum pickup arm. The selected stack location is verified by reading means located outside of the stack and directed at retroreflective marks on the card exposed by the separation.
公开/授权文献
信息查询
0/0