Simple pressure seal units and methods

A simplified pressure sealing apparatus (10) for acting on business forms (17) having pressure activated cohesive (72) to seal the cohesive has only two (12, 13) or three (35) pressure-seal rollers for effecting proper sealing. The pressure seal rollers may receive a folded business form substantially immediately from the output of a folder (11), or one of the pressure-seal rollers (35) may function to both assist in folding the form, and then pressure sealing it. The form may be held in a chute (34) above the nip (16) between the first and second pressure-seal rollers (12, 13) to be fed by gravity to the rollers, or a separate set of idler nip wheels (60) may hold the form in position once it has passed completely through the sealing nip. In either case the form may pass completely through the sealing nip yet to be moved through the sealing nip in the opposite direction, and then diverted to a stack (145).