Print Band Lubrication Method
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
Significantly less platen wear is experienced in band printers by coating the platen surface with a polyimide resin and lubricating the mating band surface with polytetrafluoroethylene (PTFE). In the figure, drive pulley 1 and idler pulley 2 move print band 3 across the surface of platen 4 adjacent print hammers 5. Platen 4 is coated on its band-engaging surface 6 with a polyimide resin, such as VESPEL SP-211*. Band 3, during its movement, functionally engages block 7 of PTFE, such as TEFLON*, continually urged against the band by spring 8. As the band rotates, PTFE is deposited on the surface as a thin film of lubricant. * Trademark of E. I. du Pont de Nemours & Co.