Inventors:
Nandakumar Vaidyanathan - Litchfield NH, US
Steven Degon - Northboro MA, US
Robert Bruce Lowd - Chestnut Hill MA, US
Brian Roland Lamoureux - Pelham NH, US
Keith Vaillancourt - Pelham NH, US
James Hand - Pelham NH, US
Assignee:
Presstek, Inc. - Hudson NH
International Classification:
B65H 23/18
US Classification:
2424121, 2424122, 2424135, 2424181, 2424206, 2425382, 226 45, 700122
Abstract:
A system of detecting and adjusting the normal force exerted by a web material around the circumferential surface of a cylinder is provided. Sensors associated with the cylinder surface are wired to a processor that compares detected normal web forces with a set value. An actuation device is activated by the processor to adjust the normal force exerted by the web by, e. g. , adjusting the tension in the web material. A positioning device that preferably translates a web-wound spool is also provided as an option for the actuation device.