Sheet processing apparatus and image forming apparatus having the same

An image forming apparatus comprising:

• an image forming portion that forms an image on a sheet;
• and a sheet processing apparatus that performs processing to the sheet on which the image is formed,
• wherein the sheet processing apparatus includes:
• a sheet stacking portion that stacks a sheet discharged from a sheet discharge portion;
• a sheet bundle displacing unit that displaces a sheet bundle stacked on the sheet stacking portion to partially expose sheet surfaces;
• and
• a glue applying unit that applies the glue to the exposed parts of the sheet surfaces of the displaced sheet bundle on the sheet stacking portion.

A sheet processing apparatus comprising:

• a sheet stacking portion that stacks a sheet discharged from a sheet discharge portion;
• a sheet bundle displacing unit that displaces a sheet bundle stacked on the sheet stacking portion to partially expose sheet surfaces;
• and
• a glue applying unit that applies the glue to the exposed parts of the sheet surfaces of the displaced sheet bundle on the sheet stacking portion,
• wherein the glue applying unit applies a glue on the exposed sheet surfaces while moving along the exposed sheet surfaces of the sheet bundle,
• the glue applying unit applies a glue on the exposed sheet surfaces while moving along the exposed sheet surfaces of the sheet bundle, and
• the glue applying unit completes a glue applying process without applying a glue to the uppermost sheet.

A sheet processing apparatus comprising:

• a sheet stacking portion that stacks a sheet discharged from a sheet discharge portion;
• a sheet bundle displacing unit that displaces a sheet bundle stacked on the sheet stacking portion to partially expose sheet surfaces;
• a glue applying unit that applies the glue to the exposed parts of the sheet surfaces of the displaced sheet bundle on the sheet stacking portion;
• and
• a sheet shifting unit that shifts the uppermost sheet on the sheet stacking portion largely more than the other sheets,
• wherein the glue applying unit applies a glue on the exposed sheet surfaces while moving along the exposed sheet surfaces of the sheet bundle.

A sheet processing apparatus comprising:

• a sheet stacking portion that stacks a sheet discharged from a sheet discharge portion;
• a sheet bundle displacing unit that displaces a sheet bundle stacked on the sheet stacking portion to partially expose sheet surfaces;
• and
• a glue applying unit that applies the glue to the exposed parts of the sheet surfaces of the displaced sheet bundle on the sheet stacking portion;
• wherein the glue applying unit applies a glue on the exposed sheet surfaces while moving along the exposed sheet surfaces of the sheet bundle, and
• the glue applying unit applies a glue to corners of the exposed sheet surfaces, and a corner shifting unit that shifts a corner of the uppermost sheet of the sheet bundle of which the sheet surfaces are exposed on the sheet stacking portion is provided.

A sheet processing apparatus comprising:

• a sheet stacking portion that stacks a sheet discharged from a sheet discharge portion;
• a sheet bundle displacing unit that displaces a sheet bundle stacked on the sheet stacking portion to partially expose sheet surfaces;
• and
• a glue applying unit that applies the glue to the exposed parts of the sheet surfaces of the displaced sheet bundle on the sheet stacking portion;
• wherein the glue applying unit applies a glue on the exposed sheet surfaces while moving along the exposed sheet surfaces of the sheet bundle, and
• a separation unit that separates the uppermost sheet from the other sheets of the sheet bundle of which the sheet surfaces are exposed on the sheet stacking portion.