Registration method and means.

摘要

Retractable pin register means for use in sheet member processing equipment comprising a reversible platen (1) to support resilient membrane members (8) comprising at least one recess in the platen having in it a resilient member (8) carrying a pin bar (8) having pins (5) projecting beyond the planar surface of the platen by flexing the side membrane and means (14) for actuating the pin bar (6) on the remote side of the member from the pins whereby to register apertured sheet members on the platen but retractable to allow a free surface for subsequent treatment while holding the sheet members by vacuum or other means.