Cold pressure transfix in a simplified printer

A cold pressure fusing apparatus for use in a xerographic copying machine for fixing a developed toner image to a substrate, comprising:

• a photoconductor mounted in said machine;
• the photoconductor surface supporting developed toner images, the photoconductor able to withstand high temperatures,
• a pressure roll mounted in said machine, the pressure roll in contact with the photoconductor, the pressure roll and photoconductor surface forming a nip for securing developed toner images to substrates, the temperature of at least one of the pressure roll and photoconductor surface being high with respect to the other, and
• a pressure control for applying pressure at the nip to secure developed toner images to the substrates, a pressure at the nip being low and the photoconductor being warmed to a temperature above room temperature,
• the pressure roll providing pressure as a function of the type of substrate, and the toner material to secure the developed toner image to the substrate.

A method of providing a fixed toner image on a substrate, wherein the image is a fixed dry powder image of toner powder having a predetermined threshold pressure and wherein fixing is achieved solely by the application of pressure applied to the powder image on the substrate, comprising the steps of:

• creating an electrostatic charge image pattern on a photosensitive surface;
• depositing dry electrostatic toner powder upon said substrate to form the image pattern;
• fixing the toner powder image to said substrate by a threshold pressure, the threshold pressure being a function of the type of substrates and the toner powder material;
• and
• applying heat at the point of fixing the powder image to the substrate.