Abstract: A buckle chute folding machine is described which has a single selector knob which selects a variety of fold patterns by simultaneous adjustment of the position of a stop blade in a buckle chute and a deflector bar positionable with respect to a nip roller set to either prevent or allow a second fold to be executed. An automatic paper feed system is provided to feed sheets from a holder tray, each sheet advanced incrementally into the machine to preclude double or overlapped feeding of the sheets through the nip roller sets.

Abstract: A table top buckle chute fold machine is disclosed in which improved and more reliable squaring of the paper to the folding rolls is accomplished by lightly driving an inserted sheet of paper with a friction roller against a selected one of several deflector assemblies. The deflector assemblies each include a deflector member spaced away from the rollers to direct the advancing edge of the paper inwardly so as to be abutted against the back of a recessed guide groove. An intermittently engaged drive roller causes the squared paper to be forcibly advanced against the groove, causing the sheet to buckle and be nipped between another pair of driven nip rollers, forming a first fold at the location determined by the location of the particular deflector assembly activated.