The Formax FD390 Air Feed Document Folder saves time and money. The FD 390 high speed air feed document folder is ideal for mail rooms, print shops, mail houses or virtually any other high volume environment. The bottom in-feed air system allows for continuous loading of forms while the extended out-feed stacker cuts down on the unloading of folded documents. Both features decrease processing time and increase efficiency. A chart for seven common fold settings is located on the out-feed stacker for easy setup. Micro-adjustment knobs are used to fine-tune the stopper position making crisp and accurate folds every time. The rigid steel fold plate construction gives the FD 390 the strength to absorb the impact of up to 65 lb. cover stock and gives a crisp accurate fold every time. Virtually any coated or uncoated job can be processed ranging in paper size from 3" W x 5" L up to 14" W x 20" L. Maintenance-free sealed ball bearings eliminate the need to lubricate bearings and provide a long lasting equipment life. Automatic roller tensioning compensates for different paper thicknesses increasing fold roller life and decreasing setup time. A rack and pinion side guide design compensates for unsquare paper. With this system, side guides are easily adjusted for the paper skew and returned to square. The unique air-blast control increases or decreases airflow to the in-feed table offering better separation of forms and increasing the accuracy of feeding curled forms and/or forms with static electricity.A clearly marked and conveniently located control panel makes for ease of operation. The in-feed and out-feed are located on the same side of the folder decreasing operator fatigue. A fold chart with seven common fold settings is located on the out-feed stacker making setup quick and easy.