Web tracking apparatus

Details Web tracking apparatus Web tracking apparatus

1974-09-10

1976-08-17

Schacher, Richard A.

Advancing material of indeterminate length

By orbitally traveling material-engaging surface

Plural spaced apart rolls

226196, B65H 2302

Patent

active

039749525

ABSTRACT:
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 moving 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.

REFERENCES:
patent: 3315859 (1967-04-01), Owen
patent: 3507437 (1970-04-01), Lips
patent: 3658227 (1972-04-01), Stephens
patent: 3776442 (1973-12-01), Ridley

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