| 摘要 |
A return mailer blank is provided for packaging a generally flat and/or rectilinear object. The mailer blank includes a flexible padding layer in sealed sandwich relation between opposed mutually matching envelope sheet layers serving as a mailing address layer and a return address layer. The mailer blank has an end-flap pair which foldably comprises a rain-flap pair that serves when folded to provide protection against weathering or moisture in the area adjoining a seal flap. The mailer blank in one embodiment has first and second main panels, each with an end-flap pair which are structured such that when folded one end flap fits into a pocket of the other, e.g. in tongue and groove fashion, to enable securing the ends of the package for forward mailing and return mailing.
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