Vacuum sucks the cards one by one from the stack into a set of rollers. Rollers pull the cards from the reader and into a stacker, where they remain in the same order in which they were fed. The votes are transmitted as data through a serial cable to a mainframe or personal computer for tabulation. Detached chad can jam two cards together, increasing misfeeds. Detached chad can jam over the light or sensor, causing holes not to be read until the chad blows out of the way.
Detached chad can migrate from one card to the next.
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