A threaded rod hanger has quick lock plunger mechanism that includes plunger pieces within a tapered bore in a housing. The processor generates a descriptor that is sent to the DMA controller causing the DMA controller to read the search key data set. The ink cartridge has an ink cartridge body and a flexible engaging member. The power of the first lens in the main scanning direction is greater than the power of the second lens in the main scanning direction, and the second lens has positive power in the sub scanning direction.