Static Testing of an Infrared Transmissive Ribbon Sensor
Original Publication Date: 1987-Jun-01
Included in the Prior Art Database: 2005-Feb-01
An infrared transmissive ribbon sensor is used in a printer to sense when a ribbon cartridge is exhausted of its supply through an infrared light source transmitting to a sensor through a window in the cartridge when the ribbon supply is exhausted and does not block the window. A testing device enables a static test to determine whether the source and sensor are properly positioned within the printer. A testing device is disposed within a printer where a ribbon cartridge is to be positioned; this is between an infrared light source 1 and an infrared sensor 2.