Envelope configuration for use in a high speed copier with envelope printing capability

Claim 1

The combination of an envelope and a copying machine, said copying machine comprising a paper supply feeder, a stack supporting platform, a sheet transport system, a sheet separating device adapted to contact a stack of envelopes to be fed placed on the platform, to separate the envelopes seriatim, and to direct the same to the starting position for the sheet transport system, said envelope comprising front and back panels folded to form and define a bottom edge of the envelope, said bottom edges of the stack of envelopes being arranged to be the leading edges of the stack of envelopes being directed by said sheet separating device to said transport system, said panels having side edges generally perpendicular to said bottom edge and being joined together by side welding with adhesive material applied to the surfaces adjacent and inwardly, respectively, and a closure flap formed as an extension of one of the panels and being defined by side edges which extend between lines projecting from and coincident with the side edges of said one panel, respectively, and for a distance which when added to the length of said side edges of said panels when the envelope is in a flat orientation is equal to or greater than the distance between said sheet separating device and said starting position of said sheet transport system.