Post processing device with saddle support

An image forming apparatus having a post processing apparatus to process paper sheets comprising:

• an image forming device to form images on paper sheets;
• a center folding member for making center folded sheets by forming a folded line on paper sheets, on which at least one image is formed;
• a loading member for loading the center folded sheets by supporting a valley side of the center-folded sheets;
• a supporting member for picking up a folded part or an adjacent folded part of a valley side of the center folded sheets loaded on the loading member;
• a driving member for swinging the supporting-member;
• and
• a conveyer for conveying the center folded sheets;
• wherein the supporting member swings from a pickup position where the supporting member picks up the center folded sheets on the loading member to a pickup finishing position where the center folded sheets are released and received by the conveyer.

A method for unloading paper sheets comprising:

• folding the paper sheets by a center folding member;
• stacking the center-folded sheets on a loading member
• picking up a folded part or an adjacent folded part of a valley side of the center folded sheets loaded on the loading member;
• and
• moving the center folded sheets from a pickup position where the supporting member picks up the center folded sheets on the loading member to a pickup finishing position where the center folded sheets are released by swinging the supporting member.

A post processing method for image forming paper sheets comprising:

• forming a folded line on paper sheets on which images are formed;
• supporting a folded part or an adjacent folded part in the valley side of a stacked paper sheets by a supporting member;
• binding a booklet by binding the stacked paper sheets supported;
• unloading the booklet from the supporting member by moving the supporting member by a driving member;
• placing the booklet on a booklet stacking table;
• and
• inserting to a cutting device and applying a trimming process.

A post processing apparatus to process paper sheets ejected from an image forming apparatus comprising:

• a center folding member for making a center folded sheet by folding paper sheets on which images are formed;
• a loading member for loading the center folded sheets by supporting a folded part of the valley side of paper sheets folded by the center folding member;
• a binding member for forming a booklet by binding the loaded center folded sheets;
• a supporting member for picking up a folded part or an adjacent folded part of a valley side of the booklet loaded on the loading member;
• a driving-member for swinging the supporting member;
• and
• a conveyer for conveying the booklet;
• and
• a cutting device to applying a trimming process on the booklet;
• wherein the supporting member swings from a pickup position where the supporting member picks up the booklet on the loading member to a pickup finishing position where the booklet is released and received by the conveyer.