Patent ID: 8657277
Filing Date: 2014-02-25
Classification: B42B

Abstract:
1. An image forming system comprising: a sheet feed section for feeding a sheet; an image forming section for forming an image on the sheet; a punching section for punching a plurality of holes on one side of the sheet; a sheet accommodation section for accommodating and aligning a plurality of punched sheets to form a bundle of sheets; a thickness measuring section for measuring a thickness of the bundle of sheets accommodated in the sheet accommodation section; a size determining section for determining a size of a ring binder to be used, based on information of the thickness of the bundle of sheets measured by the thickness measuring section; a ring binder supply section for accommodating ring binders of different sizes and supplying the ring binder of a determined size; a ring binding section for receiving the ring binder from the ring binder supply section and mounting the ring binder on the bundle of sheets; a control section provides control in such a way that, in a case of executing a job for ring binding of a plurality of copies, the thickness measuring section is caused to measure a thickness of the bundle in a first set of copies and the size determining section is caused to determines a size of the ring binder to be used, the ring binder of the size determined for the first set of copies is adopted so that ring binding is performed for a second set of copies or copies thereafter, when at least one of a status change in the sheet feed section, a main power source being turned off, or a change in a job ticket is occurred from a suspension to a resumption of the job, the thickness measuring section is caused to measure the thickness of the bundle in a first set of copies subsequent to resumption, and the size determining section is caused to determine the size of the ring binder, wherein the control section continues the job using the ring binder with the determined size, if the size of the ring binder determined for the first copy prior to suspension of the job is the same as the size of the ring binder determined for the first copy subsequent to resumption of the job, and suspends image formation and ring binding of the job, if there is a difference in these two sizes.