Printer cartridge with toner wall

摘要

An improved printer cartridge is provided with a barrier for reducing pressure on printing assembly components in an extended yield cartridge. A printing assembly, including cartridge casing, magnetic developer roller, and hopper, is provided for use with laser printers. A barrier formed by a base and a wall is positioned within the cartridge casing, between the magnetic developer roller and a feed section of the hopper. The wall of the barrier is tangent to the magnetic developer roller, minimizing the area of the magnetic developer roller which is exposed to a medium stored within the hopper and feed section, such as toner. Since exposed surface area is reduce, the amount of pressure on the magnetic developer roller is correspondingly reduced, allowing for an increase in lifespan for the magnetic roller and interactive components, primarily a doctor blade and sealing blade.

主权项

1. A printer cartridge comprising:
a cartridge casing; a magnetic developer roller located within said cartridge casing; a hopper for holding a medium; said hopper having a feed section; a barrier located within said feed section and positioned tangentially adjacent to said magnetic developer roller so that said magnetic developer roller is exposed to less of said medium, thereby reducing forces applied to said magnetic developer roller by said medium, and so that a medium free chamber located adjacent to said magnetic developer roller and adjacent to said barrier is formed; said barrier being in contact with said medium on a first side and in contact with said medium free chamber on a second side opposed to said first side; a doctor blade in contact with said magnetic developer roller for dislodging excess medium as the magnetic developer roller rotates and for creating with said barrier a region on said magnetic developer roller which is exposed to said medium; and a sealing blade located at an opposite end of said medium free chamber from said barrier and forming an end of said medium free chamber.