Dual belt drive

A reversible document transport wherein gear tooth type drive belts are used to engage each other and a document while the document is carried in a first then a second direction in the transport path past processing stations, comprising:

• a drive belt, an idler belt, first and second roller sets and a reversible drive means, said drive belt extending around said first roller set and driven by one roller which is attached to said drive means, said idler belt extending around said second roller set and having the gear teeth thereon engaging similar gear teeth on the drive belt, some of the rollers of the second roller set being spring biased holding the idler belt in contact with the drive belt and the document which is carried between the drive and idler belts maintaining the document in a fixed indexed position while it is moving from one processing station to another and until it is removed from the transport path while traveling in said second direction.