A collation folding device (12) comprising one or more fold rollers (36) mounted in fixed positions. Below and adjacent to the fold rollers are adjustable nip rollers (38) to form nip spacing between the rollers. The adjustable nip roller is mounted on a nip axis shaft (40). An adjustment mechanism (48) is used for moving the nip axis shaft to adjust the nip spacing. The nip adjustment mechanism includes a bearing block cam follower (51) on which the nip axis shaft is fixedly mounted and supported. An eccentric cam (52) in operative contact with the bearing block cam follower. Rotation of the eccentric cam on the eccentric cam axis drives the bearing block cam follower in its linear motion to adjust the nip spacing.