Adjustable folding apparatus for zigzag folding

Claim 1

In a folding apparatus having a frame member and including at least one oscillating channel guide device for delivering a web of paper or other material downwardly from a web conveyor in zigzag folds, said device having opposite sides, means for effecting a synchronous movement of said channel guide device including at least one rotatable cam having elongated arms connected to said opposite sides of said channel guide device at first pivot points for reciprocating same upon rotation of said cam, said cam being mounted on a drive shaft by fastening means extending through an elongated opening extending substantially along the longitudinal axis of said arms, said device having at least a first and second pair of bearing openings therein which are respectively co-axial and which extend parallel to said drive shaft, said openings being spaced from said first pivot points, and a first pair of co-axial rod members and a second pair of co-axial rod members, each pair respectively mounted on said frame member for axial shifting movement into and out of engagement with said first and second pair of co-axial openings for establishing second pivot points in said channel guide device, means for moving each respective pair of rod members into engagement with said first and second pair of co-axial openings thereby establishing alternate second pivot points in said device, whereby the amplitude of said channel guide device may be adjusted depending on the particular engagement between said co-axial rod members and one of said co-axial openings.