| 摘要 |
A card reader for reading data strips carried on cards, the reader having a housing with an input slot carrying a removable card alignment tray to receive the cards. A sensor is used to detect the presence of an inserted card and cause the card, once sensed, to be drawn in by card driving mechanisms and forced into, and held, in alignment. Alignment is three dimensional in that the card is held against two perpendicular guides and flat against a window. A detector senses when the card is in its aligned position and actuates an optical scanner to scan the data strip on the card. Scanning is through the window, assuring that the plane of the card is correct. When scanning is completed, the input mechanism is reversed to eject the card. Proper alignment of the data strip relative to the scanner, occurs because (a) the scanner itself is positioned by a track, (b) the alignment tray (which holds the card being read) has end and side alignment guides to position the card relative to the scanner, and (c) the data strip is in a known, predetermined position on the card.
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