Sheet-printing-press grip mechanism - has suction positioned of elastic material supplied via socket valve in transfer drum

摘要

The grip mechanism has a one-piece body containing an air-pressure and suction passage in parallel to the shaft or drum axis. This is connected to auxiliary passages leading to the periphery in a rake pattern in the direction of the feed table. At the outlets from the passages are suction positions in an oblique; arrow-shaped, straight or undulating pattern. These have surfaces ground prallel to the surfaces of the table and printing cylinder, and of elastic material pref. coated with polyurethane. the main passage has a central union for a feed pipe connected to a rotary valve on the drum or shaft. ADVANTAGE - Precision transfer of sheets without distorting them.