Paper treating unit and image forming system using the same

An image forming apparatus system, comprising:

• an image forming apparatus that forms an image on paper;
• and
• a paper treating unit;
• wherein the paper treating unit includes:
• a paper exhausting roller that delivers the paper passed from the image forming apparatus in a paper proceeding direction;
• a paper loading table for loading the paper at a paper loading position;
• a first paper aligning member that regulates the position of the paper in the paper proceeding direction;
• a first sliding unit for sliding back and forth said first paper aligning member, said first paper aligning member regulating the position of the paper by sliding back and forth in the paper proceeding direction;
• a second paper aligning member disposed upstream of the first paper aligning member in the paper proceeding direction to regulate the position of the paper in the paper proceeding direction;
• a third paper aligning member disposed along the paper proceeding direction to regulate the position of the paper in a width direction perpendicular to the paper proceeding direction;
• a second sliding unit for sliding back and forth said third paper aligning member, said third paper aligning member regulating the position of the paper by sliding back and forth in the width direction perpendicular to the paper proceeding direction;
• and
• a position detecting unit that detects the position of the first paper aligning member, the second paper aligning member and the third paper aligning member;
• and
• the first paper aligning member and the third paper aligning member are disposed independently of the paper loading table.

A paper treating unit comprising:

• a paper exhausting roller that delivers paper passed from a paper exhausting unit in a paper proceeding direction;
• a paper loading table that loads the paper at a paper loading position;
• first regulating means for regulating the position of the paper in the paper proceeding direction;
• first sliding means for sliding back and forth said first regulating means, said first regulating means regulating the position of the paper by sliding back and forth in the paper proceeding direction;
• second regulating means, disposed upstream of the first regulating means in the paper proceeding direction, for regulating the position of the paper in the paper proceeding direction;
• third regulating means, disposed along the paper proceeding direction, for regulating the position of the paper in a width direction perpendicular to the paper proceeding direction;
• second sliding means for sliding back and forth said third regulating means, said third regulating means regulating the position of the paper by sliding back and forth in the width direction perpendicular to the paper proceeding direction;
• and
• position detecting means for detecting the position of the first regulating means, the second regulating means and the third regulating means,
• wherein the first regulating means and the third regulating means are disposed independently of the paper loading table.