| 摘要 |
The mailing system includes an elongated single paper ply folded along spaced parallel longitudinal foldlines to form flaps which overlie an insert disposed between the flaps and a central web portion of the first ply. The flaps terminate short of one another and a second ply of transparent material is adhesively secured between the flaps to provide an address window for the insert. The end margins of the flaps and second ply on the one hand and the central web portion on the other hand are adhesively secured one to the other to seal the mailer. Transverse lines of perforations are provided inset of the end seals to enable the mailer to be opened and the insert extracted.
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