Compact, single fold plate, bi-roll folder, with z-fold capabili

Details Compact, single fold plate, bi-roll folder, with z-fold capabili Compact, single fold plate, bi-roll folder, with z-fold capabili

1990-07-31

1991-12-31

Look, Edward K.

Sheet-material associating

Associating and folding

Sheet associating

270 47, 493421, B42C 100

Patent

active

050765566

ABSTRACT:
A sheet folding apparatus is disclosed which includes an inlet for receiving a sheet material from outside of the sheet folding apparatus, an outlet for discharging the sheet material to outside of the sheet folding apparatus, and a folding mechanism within the apparatus for placing one or more folds in the sheet material. The folding mechanism includes a fold position controlling chamber having first and second ends and including at least one fold plate stop spaced from the first end for blocking the fold position controlling chamber, first and second fold producing rollers contacting each other at peripheral surfaces thereof and located adjacent the first end of the fold position controlling chamber for withdrawing a sheet from the fold position controlling chamber and placing a fold therein and a recirculation passage extending around the periphery of one of the first and second fold producing rollers so that a sheet can be conveyed around the outer periphery thereof and be inserted back into the fold position controlling chamber after being withdrawn from the fold position controlling chamber by the first and second fold producing rollers. The once-folded sheet can then be directed to the outlet or back through the first and second fold producing rollers to place a second fold therein. This structure permits one or more folds to be placed in sheet material while requiring only a single fold position controlling chamber and one pair of fold producing rollers.

REFERENCES:
patent: 2589436 (1952-03-01), Rouan
patent: 2807463 (1957-09-01), Smith
patent: 3804399 (1974-04-01), Rupp
patent: 4455081 (1984-06-01), Yoshimura et al.
patent: 4518380 (1985-05-01), Shimizu et al.
patent: 4586704 (1986-05-01), Lehmann et al.
patent: 4717134 (1988-01-01), Iida et al.
patent: 4900391 (1990-02-01), Mandel et al.
patent: 4905977 (1990-03-01), Vijuk

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