Sheet punching device with humidifier

摘要

A sheet processing apparatus is described which is used to process a sheet transferred from an image forming apparatus such as a copying machine. A sheet processing apparatus is provided with a punching unit which cuts off part of a sheet conveyed along a conveying route, and a humidifying unit located on this conveying route in the upstream side of the punching unit and configured to humidify a predetermined area which is selected from the entire area of the sheet and includes punch areas to be cut off from the conveyed sheet by the punching unit. The cutting wastes can thereby be electrostatically discharged without leaving the sheet excessively wet.

主权项

1. A sheet processing apparatus comprising:
a cutter unit configured to cut off a cut area which is part of a sheet conveyed in a sheet conveying direction along a conveying route; and a humidifying unit located on said conveying route in the upstream side of said cutter unit and configured to partially humidify said sheet to selectively humidify said cut area, wherein said humidifying unit selectively humidifies in a sheet width direction perpendicular to the sheet conveying direction, from among the entire area of said sheet, only said cut area or a predetermined area of said sheet including said cut area, and wherein said humidifying unit comprises a pair of rotary members engaged with each other under pressure to form a nip portion therebetween and configured to provide a humidifying liquid for a sheet which is passed between said nip portion, and a supply unit configured to supply said pair of rotary members with said humidifying liquid.