Apparatus for severing a continuous web at preselected locations spaced lengthwise of the web which includes a first drive for advancing the web at substantially uniform velocity in the direction of its length through a predetermined fixed path. A circular mandrel is mounted for rotation adjacent to...http://www.google.com.au/patents/US4543863?utm_source=gb-gplus-sharePatent US4543863 - Controlled severing of a continuous web
