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Formax 6604 Series Inserter

The versatile Formax 6604 Series adapts to most any folding and inserting application. Models are available with 2 - 7 stations, offering the flexibility to meet your specific needs. A variety of input configurations includes a high-capacity document feeder for up to 725 sheets, 1 or 2 high-capacity production feeders, standard and special feeders, and short feed trays. The 6604 Series is capable of folding and inserting top, middle and bottom-address documents into top-flap envelopes.

Standard features include a large 10.4” reversible full-color touchscreen control panel, a vertical output stacker which can hold up to 500 filled envelopes, along with a large top-loading envelope hopper with a capacity of up to 500 envelopes. The 6604 includes a new energy-saving feature which automatically puts the inserter into standby mode after 1 hour of being idle.

Various levels of Barcode Recognition (BCR) and Optical Mark Recognition (OMR) are available and feature new CIS scanning technology, which offers greater flexibility and productivity.

Additional options include a thin booklet feeder for up to 325 inserts, high-capacity output conveyor and envelope hopper for up to 1,000 envelopes each, side exit tray, cabinet and 402 Series Joggers.


Speed Up to 4,300 #10 envelopes per hour
Feed Hopper Capacity Up to 325 sheets 20#
Envelope Hopper Capacity Up to 500 envelopes
Vertical Output Stacker Up to 500 filled envelopes (reversed output)
Production Feeder (Optional) 1,200 sheets /325 BREs each, can install 2
Side Exit Tray (Optional) Up to 500 filled envelopes
Paper Size 3.5" to 14" L x 5" to 9" W
Envelope Size 3.5" to 6.4" High x 5.5" to 9.8" Wide
Paper and envelope specs may vary. All media must be tested.


Overall Height 36"
Overall Length 63" (six station models)
Overall Width 18"
Net Weight (approximate) 308 lbs. (six station models)


115 VAC

Formax 6604 Series brochure pdf file

Download the brochure and call 877.460.1212 toll free to speak to a sales representative.