Featuring programmable PLC controls with readable diagnostics and a vacuum leak check program, fully automatic Rollstock vacuum packaging machines are available in web widths from 285 to 459mm. The guided chain has an auto tensioning system. The dies are manufactured from solid aluminum block and lifted by a triple-knee lever system, driven by a 4-in. air cylinder with variable height control. Accessories include flying or guillotine cross-cut knife systems, hole punching, photo electric registration, code dating, auto labeling and gas flushing for controlled or modified atmosphere packaging.