| 摘要 |
A high-speed apparatus that processes a stack of documents such as bank checks. The apparatus includes a feeder for serially feeding the documents, an error-indicating character reader for reading characters on the documents, an operator's console for manually inputting characters rejected by the character reader, and a sorter for sorting the documents into groups. The error-indicating character reader includes a character reader, a printer located a fixed distance from the character reader and an AC synchronous motor that drives each document serially past the reader and printer in a continuous motion. The character reader provides a first electrical signal when it cannot read a character. A motor velocity detecting means provides a second electrical signal representative of the motor velocity. A variable delay means that includes a phase locked loop and shift register circuitry delays the first electrical signal (can't read from the character reader) a variable time which time depends upon the second electrical signal (motor velocity). The output of the variable delay means commands the printer to print a mark beside the unreadable (rejected) character.
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