Spreading and isolating multiple stacked cards using absorptive hole array

An approach to the separation of multiple stacked cards is presented. Separation of multiple stacked cards is a key operation in many mechatronic devices such as copy machines and cash dispensers. Separation must be performed in small operation area despite water and oil on the cards. We develop a system to separate multiple stacked cards using an array of absorptive holes. First, we show the principle of the separation of multiple stacked cards. Second, we develop a prototype card separation system using an array of absorptive holes. Next, we show experimental results of card separation and evaluate the performance of the prototype. Finally, we analyze the separating process of stacked cards in a quasi-static manner to determine appropriate absorptive pressure.