Abstract: Electrical contact devices for supplying a bias voltage to a developer roller and a primary charge roller of a toner cartridge used in an image forming system. The electricity may be communicated through electrical contact devices with or without modular inserts, using spring wires, flat springs, coil springs, unicorn springs, endfelt seals that also act as bias voltage contacts, magnetic seals that also act as bias voltage contacts, insulator spacers that also act as bias voltage contacts, scraper devices that also act as bias voltage contacts, and two legged spring contacts. Also, improved endfelts may be made using a combination of foam that has been flocked or with a surface of fibers that simulates a velvet surface and even a conductive flocking where the endfelt seal may act both as a seal and also an electrical contact.

Abstract: Electrical contact devices for supplying a bias voltage to a developer roller and a primary charge roller of a toner cartridge used in an image forming system. The electricity may be communicated through electrical contact devices with or without modular inserts, using spring wires, flat springs, coil springs, unicorn springs, endfelt seals that also act as bias voltage contacts, magnetic seals that also act as bias voltage contacts, insulator spacers that also act as bias voltage contacts, scraper devices that also act as bias voltage contacts, and two legged spring contacts. Also, improved endfelts may be made using a combination of foam that has been flocked or with a surface of fibers that simulates a velvet surface and even a conductive flocking where the endfelt seal may act both as a seal and also an electrical contact.