| 摘要 |
An envelope construction is disclosed in which an inner return envelope is nested. A foldable sheet is disclosed having an envelope built in as a one piece construction. The envelope is built in at the bottom of the sheet with a top opening flap for mailing. The top opening flap is a doubly extended flap that is sealed by glue upon mailing and the same flap is remoistened and sealed to permit the return of a reply envelope to the sender. The envelope can be formed from a single sheet during manufacture or from rolls of paper while cutting the rolls of paper. The envelope construction can also be formed by separate sheets. The envelope disclosed herein is valuable as mailers with within return envelopes for customer convenience in use.
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