Patent ID: 6184991
Filing Date: 2001-02-06
Classification: B41J,G01N

Abstract:
A detection system for measuring a dry time of a printing composition used by a printing device, the detection system comprising:a source configured to transmit a first light signal toward a quantity of printing composition deposited on a print medium, the printing composition reflecting a second light signal in response to illumination by the first light signal, the second light signal having a magnitude that decreases to a substantially constant value as the printing composition dries over a period of time;a sensor configured to detect the second light signal and convert the second light signal into an electrical signal having a value proportional to the magnitude of the second light signal; anda controller coupled to the sensor, the controller configured to receive the electrical signal from the sensor over the period of time the printing composition dries and determine a dry time for the printing composition based upon the electrical signal.