Patent ID: 8777830

Claim:
A paper folding device, comprising; a first folding unit for forming a first folding line on paper fed to a first feeding position; a first driving unit for driving said first folding unit for forming said first folding line on said paper; a first feeding unit for feeding the paper, having said first folding line formed by said first folding unit, to a second feeding position; a second folding unit for forming a second folding line on the paper fed to said second feeding position; and a second driving unit for driving said second folding unit for forming said second folding line on said paper; wherein said first folding unit includes a pair of rollers, and a knife-shaped first folding plate member pushing said first folding line to said pair of rollers; and said first driving unit moves said first folding plate member to the paper fed to said first feeding position until load on said first folding plate member exceeds a prescribed value; said device further comprising; an obtaining unit obtaining a characteristic of said paper; and a determining unit for determining a time period from start of driving of said first folding unit by said first driving unit to start of driving of said second folding unit by said second driving unit, based on the characteristic of paper obtained by said obtaining unit.