Sheet processing apparatus sheets with an adhesive

A sheet processing apparatus comprising:

• a sheet holding unit;
• a sheet conveying unit configured to convey a plurality of sheets one by one onto the sheet holding unit during sheet processing, the plurality of sheets including a first sheet and a second sheet that is conveyed immediately after the first sheet;
• an adhesive applying unit configured to apply an adhesive material;
• and
• a control unit configured to cause the adhesive applying unit to not apply the adhesive material on the first sheet after the first sheet is conveyed onto the sheet holding unit when the sheet processing is interrupted before the second sheet is conveyed onto the first sheet.

An image forming apparatus comprising:

• an image forming unit configured to form images on a plurality of sheets, including a first sheet and a second sheet;
• a sheet conveying unit configured to convey each of the sheets to a sheet processing apparatus, the second sheet being conveyed immediately after the first sheet;
• a communication unit configured to transmit a signal to the sheet processing apparatus;
• and
• a control unit configured to control the communication unit to transmit an instruction signal instructing the sheet processing apparatus to apply an adhesive material on the first sheet before the second sheet is conveyed onto the first sheet.