A document scanner uses charge coupled device sensors. The document scanner is capable of reading a maximum of two lines of information. A document scanner has the ability to acquire images in a transmission mode. Document scanner is a popular, low-cost device gaining widespread acceptance for image acquisition in electrophoresis. A document scanner acts much like a photocopier in that it creates an image of a flat surface, such as a photograph or a sheet of paper.

Dolly casters are specially constructed for heavy-duty applications. It has high impact hard rubber wheel. The dolly casters are the second dolly component. The casters and wheel as a group include several parts such as axle, axle bracket, caster and mounting method and location, and wheel and covering or exterior surface. This group of dolly components supports the dolly weight, carton or unit-of-product weight, and permits employee to move the dolly across the finished floor surface. Each dolly caster is attached to a specific location on the bottom of the deck board. These casters are strategically located under the bottom deck board to balance the carton stack and support an equal portion of the load weight.