Document scanning is the first step in upgrading to electronic document management, which promises massive storage capacity, high security and easy retrieval of office documents. Large format document scanners come in a wide variety, and choosing from them according to your need is as demanding yet worth task. Most document scanners are of flatbed type. They come in color as well as black and white. Black and white scanners are much cheaper and would suffice for much of the day-to-day office document management. A duplex scanner can handle pages with one or both of their sides printed. Document scanners with video card interface are available for processing bar codes or patch codes or for increasing the quality of scans.
The speed of the document scanner is an important factor and is expressed in inches per second or meters per minute; some scanner speeds are also expressed in sheets per minute. Some of the high-end document scanners also have the capability to print the documents that scan.Document scanners are rated for a duty cycle in number of pages per day. This is the number of pages that the machine is designed to handle per day and should not be exceeded in order to ensure maximum life. The parts of an overloaded scanner wear out much more quickly. So a scanner of optimum duty cycle should be chosen for maximum economy.
Although most document scanners are of the flatbed type, with the document lying stationary on a glass pane, vertical scanners, in which paper is fed through the top and moves downwards past the sensors, are also popular. Some of the newer scanners are equipped with the revolutionary iJet technology, which allows the user to take printouts from a large format printer directly to the scanner. It also lets the scanner be connected directly to an existing LAN without an attached host PC.
Lanier, Canon, Visionshape, Fujitsu, Vidar, ACTION Imaging, Contex, IDEAL and Oce are among the leading manufacturers of large format document scanners.