Sensor mechanism for a printing machine
View Patent ↗Controlling a sensor mechanism for a printing machine, in which the sensor mechanism in a printing machine detects, in an initial operational mode, at least one mark and the detection of the mark initiates a second operational mode in which the optical density and the color of the mark are detected by the sensor mechanism.
1. A process for controlling a sensor mechanism ( 1 ) for a printing machine, comprising the steps of: setting a first operational mode for said sensor mechanism ( 1 ) wherein said sensor mechanism ( 1 ) detects at least one mark ( 5 ), and responsive to detection of said mark ( 5 ), initiating a second operational mode for said sensor mechanism ( 1 ) in which said sensor mechanism ( 1 ) measures values of the optical density and the color of said mark ( 5 ).
2. A process according to claim 1 , wherein said optical density of said mark ( 5 ) is determined and subsequently said color of said mark ( 5 ) is determined by using said information pertaining to said optical density.
3. A process according to claim 2 , wherein said detection of said edge of said mark ( 5 ) in said first operational mode initiates beaming of a light containing at least three colors onto said mark ( 5 ) in said second operational mode.
4. A process according to claim 1 , wherein during said first operational mode a determination is made as to whether said mark ( 5 ) is in register.
5. A process according to claim 1 , wherein said values of said optical density and said color of said mark ( 5 ) in said case of different printing media that bear said mark ( 5 ) are multiplied by a correction value that is specific to said printing medium.
6. A process according to claim 1 , wherein said values of said optical density and said color of said mark ( 5 ) relative to different shadings of a conveyor belt ( 3 ) as said bearer of said mark 5 are multiplied by a correction value that is specific to said conveyor belt.
7. A sensor mechanism ( 1 ) for a printing machine, comprising: a first operational mode for detecting a mark ( 5 ); a second operational mode for detecting said optical density of said mark ( 5 ) and said color of said mark ( 5 ); and a triggering mechanism ( 14 ) for initiating said second operational mode when said mark ( 5 ) is detected in said first operational mode.
8. A sensor mechanism according to claim 7 , including a lighting mechanism ( 12 ) for beaming a multicolored light on said mark ( 5 ) in said second operational mode of said sensor mechanism ( 1 ).
9. A sensor mechanism ( 1 ), according to claim 7 , including a differential diode ( 2 ) in said sensor mechanism ( 1 ) for receiving a light beam.