A universal serial bus device is comprised of a receiver for receiving signals from a USB host through data lines, and a pull-up resistor circuit connecting pull-up resistors to data lines in response to control signals. The raster formatted print data or image formatted print data is received at the different printing pipeline stages according to the print data’s level of rasterization. When the shutter wing is in the closed position, the blades form a folded shape with a waist section large enough to cover the entire aperture.