Device for steering and tensioning a web

摘要

The web (50) is partially wrapped around a rotatable guide roller (32). A first end (36) of the guide roller (32) is carried on a tiltable support member (38). The opposite end (39) is attached to a pivotal bearing (40). A non-contact sensor (41) is positioned to detect lateral misalignment of the web (50). A control device (44) responsive to the sensor (41) controls the tilting of the support member (38) thereby to correct for lateral misalignment of the web (50). Pressure devices (45, 47) exert a predetermined pressure on each end of the guide roller (32) independently of the position of the tiltable support member (38), to push the guide roller (32) towards the web (50) to generate the desired tension. <IMAGE>