A sheet folding device includes a sheet conveyance path, first and second side plates, a first folding roller pair, a first folding guide, and a guide drive mechanism. The first folding guide is reciprocatable between a folding position and a retracted position, and includes a guide main body and first and second arms provided respectively at both ends of the guide main body. The guide drive mechanism includes a drive source provided on the first side plate, a first drive transmission portion that transmits a drive force of the drive source to the first arm, a second drive transmission portion that transmits the drive force to the second arm, and a drive coupling portion that couples the first drive transmission portion to the second drive transmission portion and transmits the drive force from the first drive transmission portion to the second drive transmission portion.

A flap folding arrangement is disclosed. The flap folding arrangement includes an axially extending rim that initially contacts a flap of a product to partially fold the flap as the product is dropped from a feed conveyor into a first pocket of a rotator pan. A controller is adapted to rotate the rotator pan away from a first position which drives the flap into contact with a flap-folding flange and a radially extending rim until the product is positioned at a second position under a flap-folding gate. The controller is adapted to drive a product discharger into contact with the product to drive the product out of the first pocket and away from the folding assembly after rotation of the rotator pan.

An enclosing apparatus for enclosing an enclosure into an envelope at an enclosing position includes a conveyance roller that conveys the envelope to the enclosing position and an envelope conveyance path through which the envelope is conveyed. An enclosing support is disposed in the envelope conveyance path and supports enclosing of the enclosure into the envelope. The enclosing support retracts a flap of the envelope from the envelope conveyance path while the conveyance roller conveys the envelope to the enclosing position.

A folding device is provided for folding a sheet comprises a jaw cylinder, a folding cylinder, a paper guide, and an actuator. The jaw cylinder has a jaw, and the folding cylinder has a hold down element and a folding blade. The folding blade is movable between an extended position and a retracted position. The folding blade is in the extended positron to transfer one or more sheets to the jaw cylinder during a fold off operation, and the folding blade is in the retracted position during a collect operation. The paper guide is positioned between the folding cylinder and the jaw cylinder. The paper guide includes a static guide element and a reciprocating guide element connected to the static guide element, the reciprocating guide element movable between a retracted position and an extended position. The actuator is connected to the reciprocating guide element; the actuator configured and arranged to place the reciprocating guide element into the extended position during the collect operation and into the retracted position during the fold-off operation.

A sheet folding device includes a sheet loading unit, a folding processing unit, and an ejection roller. The folding processing unit includes a folding roller pair. A sheet alignment part and a sheet moving part are provided. A sheet loading tray includes an upstream-side loading part and a downstream-side loading part. The sheet alignment part includes an upstream-side alignment part and a downstream-side alignment part. The downstream-side alignment part includes a side plate, a fixed guide plate, and a movable guide plate supported on the side plate in such a manner as to be swingable between a retreat position and a regulation position.