Patent ID: 6313928
Filing Date: 2001-11-06
Classification: H04N

Abstract:
A document size detection device, comprising:document detection sensor means positioned at a first location on a document insertion line across a document feed path for detecting a document, said first location being positioned within a width of a first-sized document;document position sensor means positioned at a second location on a scan stand-by line across the document feed path for sensing a position of the document, said second location being positioned within the width of said first-sized document;document size detection sensor means positioned at a third location between said document insertion line and said scan stand-by line, and within an area formed between lateral boundaries of said first-sized document and a second-sized document, for detecting a size of the document;document feed roller means for feeding the document; andcontroller means for controlling said document feed roller means to feed the document up to said scan stand-by line if said document detection sensor means detects the document;wherein said controller means determines the document to be said first-sized document if said document size detection sensor means does not detect the document; andwherein said controller means determines the document to be said second-sized document if said document size detection sensor means detects the document.