Sheet feeder for printing machine has adjustable side walls with integral pressure chambers to improve access

摘要

The sheet feeder has side walls and at least one pressure chamber (18) on one side wall (12). This wall is adjustable and wall and chamber are moved together. A second side wall (13) with pressure chamber (19) is also adjustable. One or both side walls reformed by fold-down sides pivoted about a horizontal axis. Each chamber has an air connection and an intake suction aperture. One or both chambers are vacuum-charged via a pneumatic coupling (21,22).