| 摘要 |
Blank sheet feeding device and the operation method thereof are provided that the reliability of user is increased. A blank sheet feeding device comprises a roller(20) which is arranged in the inner side of the blank molding unit, and is driven so that the blank sheet shaped with the blank molding unit is transferred, an electromagnetic field output mean outputting the electromagnetic field in the roller drive, a sensor unit sensing the location of the blank sheet through roller in the blank sheet transfer, a control means controlling the drive of the roller corresponding to based on the signal sensed through the sensor unit. The sensor unit includes a position detecting sensor(41) sensing the location of the blank sheet, a breakaway detection sensor(43) sensing the breakaway of the blank sheet, an approaching sensor(45) sensing the molding completion time of the blank sheet.
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