Oblon, McClelland, Maier & Neustadt, L.L.P.
Ink discharging apparatus and ink discharging method
Provided is an ink discharging apparatus configured to discharge an active-energy-ray-curable ink from an ink discharging head of which members to contact the ink are joined using an epoxy adhesive, wherein the ink contains at least any one selected from the group consisting of an acrylamide compound and an N-vinyl compound, and wherein an elastic modulus decreasing rate represented by a formula (1) below is 50 percent or less, Elastic modulus decreasing rate (%)={(E1−E2)/E1}×100   formula (1) where E1 represents an elastic modulus (GPa) of a cured product obtained by curing the epoxy adhesive at 90 degrees C. for 4 hours, and E2 represents an elastic modulus (GPa) of an immersed product obtained by immersing the cured product in the ink at 60 degrees C. for 4 weeks. 
Ricoh Company, Ltd.
B C B B B C B B B C C
B41J C09D B33Y B41J B29C C09D B41J B41J B33Y C09J C08G
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Hiroaki
Yamada