Control for printed matter cut length

摘要

Sensors are coupled to a logic unit (5) which delivers the displacement signal of a displacement sensor during the covering of the first sensor by a brochure, the displacement signal from a second sensor while it is covered, and the displacement signal while one of the sensors is not covered. The signals are output to respective outputs. The three logic outputs are coupled to respective counters (13, 14, 16) and these in turn to a single chip computer. The computer (17) feeds a relay (19) operating a points-switch (20).