| 摘要 |
A business form (mailer) has top and bottom plies that are slightly larger than an insert ply. The insert ply is connected to the top and bottom plies along one lengthwise and one widthwise edge, but is free of connection at the other lengthwise and widthwise edges. Perforations in the insert ply parallel to the connected lengthwise and widthwise edges form a detachable portion, particularly a check. A check may be made of bond paper yet information printed on the check stub (between a lengthwise edge and perforation parallel to it) is transferred to the lower ply by a self-imaging spot disposed on the top surface of the bottom ply underneath the check stub.
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