Web tracking apparatus

Details Web tracking apparatus Web tracking apparatus

B - Operations, Transporting

65

H

271/47

B65H 23/02 (2006.01) G03G 15/00 (2006.01)

Patent

CA 1037985

WEB TRACKING APPARATUS ABSTRACT OF THE DISCLOSURE Web tracking apparatus for a flexible, closed loop web moving in a closed loop path defined by two or more cylindrical, hard surface supports mounted on a frame and having substantially parallel longitudinal axes which are substantially perpendicular to a plane passing through the respective midpoints of the supports. Included are at least two laterally constraining web supports,at least one of which is a passive positional lateral constraint and includes a cylindrical web-engaging surface which presents substantially no resistance to lateral movement of the mov- ing web, and edge guides mounted adjacent to the cylindrical surface in a predetermined spatial relation to the frame, and having spaced web engaging portions fixed a distance apart which corresponds substantially to width of the web for engaging the edges of the moving web.

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