Device for aligning a line of material accurately in relation to the edges

摘要

An apparatus for aligning a longitudinal edge of a flexible and continuously longitudinally moving web has a support having a longitudinally nondisplaceable face extending transversely across and immediately adjacent the edge and an alignment element having a plurality of parallel and elongated formations engageable with the web. An actuator displaces the element between an aligning position with the formations extending at an acute angle to the edge, pressing the web against the support face, and urging the moving web transversely outward at the edge and a standby position with the formations out of operative engagement with the web.