Patent ID: 7222936

Claim:
An imaging apparatus, comprising: a housing having a cartridge exchange opening; a printhead carrier system contained in said housing, said printhead carrier system having a printhead carrier; a cover pivotably attached to said housing, said cover having an engagement surface, wherein when said cover is in a closed position said cartridge exchange opening is not exposed; and a switch unit having a switch actuator and a switch, said switch having an output selectable between a plurality of states, said switch actuator being configured for actuating said switch, said engagement surface of said cover being positioned to engage said switch actuator to select one of said plurality of states of said switch when said cover is in said closed position, and said switch actuator being linked with a button that is accessible by a user to facilitate manual manipulation of said switch actuator by a force applied to said button by said user to manually select one of said plurality of states of said switch, said printhead carrier being positioned based on said output of said switch.