Abstract: In order to ensure the prompt processing of payments of bills with personal checks while using automatic mail opening equipment, a return envelope assembly includes a front panel and a rear panel each having a top edge, a bottom edge, and a pair of side edges. The front and rear panels are integral along their bottom edges about a bottom fold line about which they may be folded so as to have their inner surfaces lie in confronting relation after the envelope is formed from a one piece blank. A side flap is integral with each of the side edges of the front panel about respective side fold lines which are structured such that the side flaps may be folded inwardly to lie between the confronting inner surfaces of the front and rear panels. The side flaps are secured to the inner surface of the rear panel using an adhesive and a closure flap is provided to seal an opening defined by the top edges of the front and rear panels.

Abstract: In order to improve binding line output by reducing equipment downtime effects, a book accumulator for a binding line is provided. The binding line book accumulator includes a book accumulating table for accumulating books from and returning books to a binding line in first-in first-out fashion, and it also includes a first diverter for diverting books from the binding line to the book accumulating table and a second diverter for diverting books from the book accumulating table to the binding line. In addition, a control is provided for selectively and independently operating the first and second diverters upon demand in response to a variety of factors.