Document size detection device for an image recording and forming apparatus

摘要

A document size detection device for a facsimile device that improves the accurately of original document width detection. This reduces the errors generated by using an excessive amount of reduction on received facsimile images. The device uses a rotary document width sensor to increase the degree of accuracy with which the width of a document can be sensed. This also reduces the magnitude of excessive reduction that occurs when a document is improperly loaded and causes a width to be detected that is slightly larger than the actual width.