Patent ID: 8335024

Claim:
An image scanning method of an image scanning device including a scanning unit, the image scanning method comprising: simultaneously feeding documents in a first path and scanning, by the scanning unit, a first document of the simultaneously fed documents, wherein the simultaneously fed documents are stacked such that the first document is between the scanning unit and a second document, of the simultaneously fed documents, when the first document is scanned; outputting the first document through an exit unit of the image scanning device; and reversely driving the exit unit after the first document is output to reversely feed the second document in a second path, and scanning, by the scanning unit, the second document, comparing a spaced distance between the first and second documents with a predetermined minimum distance used to reversely drive the exit unit, wherein the second path is used to reversely feed the second document to an upstream side of the scanning unit, in view of a feeding direction of the simultaneously fed documents.