Duplo Seiko Corporation

Chikara Miyamoto

Masanobu Ohashi

An object of the present disclosure is to prevent wrinkles in a folding line portion of a paper irrespective of the conditions such as the type, the size, and the like of the paper, thereby securing the precision of the position of a folding line when a flap (such as a flap portion) of an envelope is folded back. The folding unit comprises a pair of an upper and a lower guide plates that defines part of the paper conveyance path at the folding position, and the folding plate is configured so that, when turning from the placement position to the overlap position, a lower face of the folding plate overlaps an upper face of the upper guide plate of the pair of the upper and the lower guide plates.

Paper folding device

An object of the present invention is to ensure rigid formation of the folds of the protrusions of the paper sheet and smooth conveyance of the folding-processed paper sheet to the downstream side of the folding position in the paper conveyance direction without causing the problems such as jamming. A folding unit includes a lower guide plate arranged at a position facing a folding plate at the folding position, and an arrangement position of a turning shaft of the folding plate is vertically movable with respect to the lower guide plate.

A paper folding device that folds a planar paper sheet while conveying the paper sheet along a paper sheet conveyance surface includes a pair of first conveyance rollers disposed on an upstream side in a paper sheet conveyance direction, a pair of second conveyance rollers disposed on a downstream side in the paper sheet conveyance direction, a switching gate plate installed on the paper sheet conveyance surface between both pairs of the rollers, a folding plate disposed above the switching gate plate, and a control unit that controls an operation of an entire device.

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Kinokawa, Japan

Chikara Miyamoto