Method and apparatus for cross-folding signatures

Details Method and apparatus for cross-folding signatures Method and apparatus for cross-folding signatures

1994-12-09

1996-08-20

Ryznic, John E.

Manufacturing container or tube from paper; or other manufacturi

Bending

Folding

493471, B41F 1360

Patent

active

055474527

ABSTRACT:
A collecting cylinder and a folding flap cylinder cooperate to form a cross-folding device for signatures in a rotary printing press. The leading edge of each signature is initially retained on the collecting cylinder and is held there after insertion of the cylinder into the folding flap. The trailing edge of the signature is transferred to grippers on the folding flap cylinder at a point where the two cylinders are in contact. Operation of the cross-folding device results in reduced folded product damage.

REFERENCES:
patent: 3870292 (1975-03-01), Bradley
patent: 4036487 (1977-07-01), Heimlicher
patent: 4666139 (1987-05-01), Filewich
patent: 4893803 (1990-01-01), Petersen
patent: 5035993 (1991-07-01), Staeb
patent: 5057064 (1991-10-01), Michalik
patent: 5201701 (1993-04-01), Roettger et al.
patent: 5417642 (1995-05-01), Boronka et al.
patent: 5429578 (1995-07-01), Calbrix et al.

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