Patent ID: 8248658

Claim:
An imaging system for forming an image on a sheet, the system comprising: a computer for creating data of an image for printing; and an imaging apparatus for forming the image on a sheet, wherein the imaging apparatus comprises: a sheet-feeding path for conveying the sheet; a detecting section positioned along the sheet-feeding path for detecting a leading edge, a trailing edge and a side edge of the sheet while the sheet is being conveyed along the sheet-feeding path; and a controller for registering a dimension, a memory for storing data of dimensions, wherein, the detecting section detects the leading edge, the trailing edge and the side edge of the sheet while the sheet is being conveyed along the sheet-feeding path and the controller obtains dimensions of a length and a width of the sheet, and then the controller registers the dimensions of the length and the width of the sheet to be stored in the memory as data, wherein the controller comprises: a sheet type determining section which judges whether the dimensions of the measured length and width are equal to dimensions of length and width of a regular sized-sheet by comparing the dimensions of the measured length and width with the dimensions of the regular sized-sheets whose data have been previously stored in the memory; and a registration condition determining section, which judges whether data of dimensions of length and width equal to the dimensions of the measured length and width exist in the memory.