Simple pressure seal units and methods

A simplified pressure sealing apparatus for acting on business forms having pressure activated cohesive to seal the cohesive has only two or three 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, or one of the pressure-seal rollers may function to both assist in folding the form, and then pressure sealing it. The form may be held in a flip plate above the nip between first and second pressure-seal rollers, or a separate set of idler nip wheels 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 be moved through the sealing nip in the opposite direction, and then diverted to a stack.