Canon Kabushiki Kaisha

Takaharu Hayasaka

Kenichi Hayashi

Hideki Kushida

Hitoshi Fujimoto

Shigeo Doi

There are provided a sheet processing apparatus and an image forming apparatus which can adjust adhesive strength by a simple configuration. A toner image for adhesive strength adjustment is formed on a toner image of a sheet to be bonded by an image forming portion provided in a copying machine body. An adhesive is applied onto a bonding portion of the sheet by a gluing device provided in a finisher. The bonding portion of the sheet onto which the adhesive is applied and the toner image having the toner image for adhesive strength adjustment of the sheet are bonded together by a second pushing-out member and a pair of second folding rollers provided in the finisher. The amount of toner forming the toner image for adhesive strength adjustment formed by the image forming portion is adjusted to adjust the adhesive strength of the adhesive.

Sheet processing apparatus and image forming apparatus

The present invention provides a sheet processing apparatus and an image forming apparatus which can achieve reduction of running cost. A notch part forming portionA including a punchand a dieforms plural notch parts in an end part of a sheet bundle folded by a sheet folding portion. A discharge roller pairandturns back the notch parts to bind the sheet bundle. As a result, the sheet bundle can easily be opened and the reduction of the running cost can be achieved because stapling is not performed.

A current invention provides a sheet processing apparatus and an image forming apparatus capable of obtaining a sheet bundle which can be double-leaved and released without use of any binding device. A slit S to which a projection Pa provided at an end portion opposite to a side to be bound by a binding portion of a front cover Pis formed in a back cover Pof a sheet bundle PA by an insertion portion forming portion. Further, creases L, Lfor inserting the projection Pa into the slit S while surrounding sheets Pexisting between the front cover Pand the back cover Pare formed in the back cover Pof the sheet bundle PA by a crease forming portion.

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Toride, Japan

Takaharu Hayasaka