Patent ID: 8051984

Claim:
An improved, seed pack envelope formed of a sheet of envelope material having a front panel, a back first panel connected to the front panel along a first fold crease at a first edge of the front panel, a side second panel connected to the front panel along a second fold crease at a second edge of the front panel and a side third panel connected to the front panel along a third bottom fold crease at a third edge of the front panel, the back first panel being folded back 180° onto the front panel and the side second and third panels being folded back 180° and bonded to the back first panel to form the envelope, two of the fold creases being laterally opposite fold creases along laterally opposite side edges of the envelope, wherein the improvement comprises: (a) an aperture extending not only through and entirely across the front panel from one of the laterally opposite fold creases to the other laterally opposite fold crease but also further extending beyond the laterally opposite fold creases into the panels that are connected to the front panel along the laterally opposite fold creases; (b) a transparent sheet of window material extending beyond the aperture so as to overlap the sheet of envelope material in a peripheral overlap area around the aperture, the transparent sheet having a width greater than the distance between the laterally opposite side edges and folded along the laterally opposite side edges, the transparent sheet being bonded at the peripheral overlap area to at least the front panel and the panels that are connected to the front panel along the laterally opposite fold creases, the portion of the transparent sheet of window material that extends across the front panel being folded 180° and lying against the portion of the transparent sheet of window material that extends across the panels that are connected to the front panel along the fold creases; (c) the panels ( 14 , 18 ), that are connected to the front panel ( 12 ) along creases ( 16 , 20 ) that are along the laterally opposite side edges, having a lower portion ( 50 , 52 ) extending beyond the bottom fold crease ( 24 ) and integrally connected to the panel ( 22 ) that is connected to the front panel ( 12 ) along the bottom fold crease ( 24 ) so that lower portions ( 50 , 22 , 52 ) of all three panels that are connected to the front panel ( 12 ) are folded 180° along the bottom fold crease ( 24 ); (d) the aperture having gussets ( 40 ) formed in the sheet of envelope material at the opposite ends of the bottom fold crease, the gussets ( 40 ) extending across a portion of the front panel at bottom corners of the envelope and beyond the laterally opposite side edges to laterally opposite sides of the aperture; and (e) the transparent sheet of window material ( 34 ) extending at least from the aperture onto, and bonded to, all three lower portions ( 50 , 22 , 52 ) and to the gussets ( 40 ) so that the bottom corners of the envelope are formed by four two-layer laminated layers of envelope material and window material.