Conductive transfer roller

A conductive transfer roller for an image forming apparatus comprises an elastomer foam formed by blowing a blended raw material, which includes elastomer, 1 -4 phr of liquid thiophene as conductive material, and 0.2-6 phr of wood powder as nucleating agent. ... 

In the first test, conducted in July under hot and relatively dry conditions, the grass was cut to 5 cm and raked prior to application of the chlorpyrifos/ chlorothalonil mixture. Deposition rates were determined by strategic placement of 10-cm X 10-cm cotton gauze coupons backed with aluminum foil. The test plot was allowed to dry for 4 h before sampling. The mean transfer efficiencies for chlorpyrifos were 2.37 ng/m (0.087%) for the PUF roller and 1.05 ng/m (0.039%) for the drag sled. The transfer efficiencies were much higher for... 

Several spacer designs are illustrated in Fig. 7.31. For transfer lines with nominal diameters up to 0.2 m the fixed square or triangular spacers are adequate. Rollers are typically used as spacers for longer lines because thermal stresses that result in cooldown necessitate that the contact points not be fixed. Stainless steel and low thermal conductivity organic plastics like Teflon are the most commonly used spacer materials. 

---