Appeal No. 2003-0298 Page 9
Application No. 09/497,797
for printing with water based inks through the use of one or more cooling units. A print
cylinder cooling unit 7 is assigned to the upper and lower print cylinders 3, 5. The print
cylinder cooling unit 7 includes a print cylinder inlet pipe 7.1 and a print cylinder outlet
pipe 7.2 for each of the print cylinders 3, 5. A lower print cylinder sensor 19.2 is
arranged near the lower print cylinder 5, and an upper print cylinder sensor 19.1 is
arranged near the upper print cylinder 3. A pair of relative humidity sensors 60.1, 60.2
are mounted within the printing unit 1 to measure the relative humidity of the
atmosphere in the upper print unit section 1.1 and lower printing unit section 1.2, and a
pair of temperature sensors 60.3, 60.4 are mounted within the printing unit 1 to
measure the temperature of the atmosphere in the upper print unit section 1.1 and
lower printing unit section 1.2. A control unit 18 has respective inputs connected to the
print cylinder sensors 19.1, 19.2, the relative humidity and temperature sensors 60.1,
60.2, 60.3, 60.4 and an output connected to the cooling unit 7. The control unit 18
periodically monitors the temperature of the print cylinders 3, 5 via the sensors 19.1,
19.2, and of the atmosphere with the relative humidity sensors 60.1, 60.2 and
temperature sensors 60.3, 60.4, and then controls the print cylinder cooling unit 7 as a
function of the monitored temperature values. A blanket cylinder cooling unit 8 is
assigned to the upper and lower blanket cylinders 4, 6.
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Last modified: November 3, 2007