Method of and apparatus for measuring curl of web, method of and apparatus for correcting curl of web, and apparatus for cutting web

摘要

A web cutting apparatus has a decurling unit for correcting curl of a web unwound from a reel while the web is being fed, a slitter for slitting the web, a cutter for cutting the web into successive sheets each having a predetermined length, a curl measuring unit disposed at an exit end of the runner cutter, and a conveyor for conveying the sheets to a stacker station. The curl measuring unit has a cut completion detecting mechanism for detecting when the web is cut by the cutter, a cutter distance measuring mechanism for detecting the position of the cutter, and a web displacement measuring mechanism for detecting a displacement due to a bend of a free distal end of the web.