| 摘要 |
Method for automatically processing sweepstakes entries and mail orders is accomplished by reading a machine code identifying the sender and simultaneously detecting orders from non-orders using a magnetic field detector, without opening the envelopes. During the outgoing mail processing, a machine code indicative of the recipient is preprinted on each carrier envelope or reply sweepstakes insert. This code is read and used to print a machine code corresponding thereto on the return envelope. The return envelope and the reply insert, along with order stamps each having a magnetic ink layer, are inserted into the carrier envelope and mailed out to the recipient. The return envelopes which are received from the recipient (sender) are fed through a sorter, upon which the sorter will detect whether each return envelope contains an order stamp. The machine code printed on the outside face of the envelope is used for identification of the contestant and for sweepstakes entry. If the sorter detects no magnetic stamp in the sealed envelope, it is routed to a non-order batch. If the sorter detects the presence of any magnetic stamp in the sealed envelope, it is routed to an order batch where the envelope is opened for order processing.
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