Printing press and device for the inline monitoring of printing quality in sheet-fed offset printing presses

A printing press for processing sheet printing materials, the printing press comprising:

• at least one printing unit;
• a computer;
• a measuring device for monitoring printing quality during a printing process, said measuring device having a sensing device for measuring by color or spectrally to register the printing material, said sensing device having at least one illuminating device, said at least one illuminating device providing illumination for being synchronized with a measuring time of said sensing device;
• and
• at least one sheet-guiding element for leading the sheet printing material past said sensing device.

A printing press for processing sheet printing materials, the printing press comprising:

• at least one printing unit;
• a computer;
• a measuring device for monitoring printing quality during a printing process, said measuring device having a sensing device for measuring by color or spectrally to register the printing material, said sensing device having at least one measuring module and at least one illuminating device with optical waveguides and at least one light source, said optical waveguides having one end assigned to individual measuring modules and another end assigned to said at least one light source in a thoroughly mixed bundle, said sensing device being a measuring beam having a U-shaped profile with an interior, said U-shaped profile being open towards the printing material, at least one movable measuring carriage being accommodated in said interior of said U-shaped profile, and said at least one light source being disposed outside said measuring carriage;
• and
• at least one sheet-guiding element for leading the sheet printing material past said sensing device.

A printing press for processing sheet printing materials, the printing press comprising:

• at least one printing unit;
• a computer;
• a measuring device for monitoring printing quality during a printing process, said measuring device having a sensing device for measuring by color or spectrally to register the printing material, said sensing device having at least one measuring module and at least one illuminating device with optical waveguides and at least one light source, said optical waveguides having one end assigned to individual measuring modules and another end assigned to said at least one light source in a thoroughly mixed bundle, said sensing device being a measuring beam having a U-shaped profile with an interior, said U-shaped profile being open towards the printing material, at least one movable measuring carriage being accommodated in said interior of said U-shaped profile, and said at least one light source being disposed in said measuring carriage;
• and
• at least one sheet-guiding element for leading the sheet printing material past said sensing device.

A printing press for processing sheet printing materials, the printing press comprising:

• at least one printing unit;
• a computer;
• a measuring device for monitoring printing quality during a printing process, said measuring device having a sensing device for measuring by color or spectrally to register the printing material;
• a transparent cover protecting said sensing device against contamination, said sensing device containing a device for monitoring a condition of said transparent cover;
• and
• at least one sheet-guiding element for leading the sheet printing material past said sensing device.

A printing press for processing sheet printing materials, the printing press comprising:

• at least one printing unit;
• a computer;
• a measuring device for monitoring printing quality during a printing process, said measuring device having a sensing device for measuring by color or spectrally to register the printing material;
• cleaning tools matched to a shape of parts of said sensing device to be cleaned;
• and
• at least one sheet-guiding element for leading the sheet printing material past said sensing device.

A printing press for processing sheet printing materials, the printing press comprising:

• at least one printing unit;
• a computer;
• a measuring device for monitoring printing quality during a printing process, said measuring device having a sensing device for measuring by color or spectrally to register the printing material;
• a transparent cover protecting said sensing device against contamination;
• webs disposed on a side of said transparent cover of said sensing device facing the printing material;
• and
• at least one sheet-guiding element for leading the sheet printing material past said sensing device.