Envelope-type mailing folder

Claim 1

In an envelope-type mailing folder formed from a unitary blank of foldable paperboard, the combination of: (a) a rear panel; (b) a pair of end panels foldably joined to opposite ends of said rear panel and folded to overlie marginal end portions of said rear panel; (c) a front panel foldably joined along one side edge to a side edge of said rear panel; (d) said front panel overlying said rear panel and said end panels and being secured to the latter to form with both said rear panel and said end panels an internal, primary pocket for receiving material to be transported in said folder; (e) a closure flap foldably joined to another side edge of said front panel and being folded to overlie and be secured to said rear panel to close said primary pocket; (f) a transparent, plastic film having marginal areas secured to a portion of said front panel, said end panels and an outer surface of said rear panel extending the entire length thereof to form with said rear panel a separate, external secondary pocket for receiving and displaying other material, said plastic film including a pair of sheets having adjacent marginal areas disposed in overlapped relation to provide access to said secondary pocket.