Abstract: A photo-polymerizable ink-jet ink composition comprises a photo-polymerizable resin consisting of photo-polymerizable monomers, a photo-polymerization initiator, and a coloring material and is substantially free from a solvent. The photo-polymerizable monomers contain a hexa-functional monomer in a proportion falling within the range of 10% by weight to 30% by weight with respect to a total amount of the ink composition. The photo-polymerizable monomer other than the hexa-functional monomer is selected from the group consisting of a bi-functional monomer, a combination of a bi-functional monomer and a mono-functional monomer, a combination of a bi-functional monomer and a tri-functional monomer, and a combination of a bi-functional monomer, a mono-functional monomer, and a tri-functional monomer.

Abstract: A cationically polymerizable composition is provided, which comprises a cationically polymerizable compound, a cationic polymerization initiator, and a specific tertiary alkanolamine or tertiary alkylamine. The cationically polymerizable compound is preferably an alicyclic epoxy compound and an oxetane compound. The above amine accounts for 0.01 to 1.0% by weight, preferably 0.05 to 0.5% by weight of the total of the cationically polymerizable composition and the cationic polymerization initiator accounts for 0.1 to 20 parts by weight based on 100 parts by weight of the cationically polymerizable compound. The composition is excellent in storage stability and dispersion stability of colorants contained therein.

Abstract: An inkjet printer performing printing a print paper (3) by ejecting an UV-curing type ink to the print paper (3) through an inkjet print head (5) includes an ultraviolet irradiation device (A) having an ultraviolet light generation section (10) for generating ultraviolet light and optical fibers (11a, 11b) through which the ultraviolet light generated by the section (10) is guided to a position close to the inkjet print head (5). In the inkjet printer, ink ejection and ink curing are repeated in order to form a thick film, where the inkjet print head (5) performs the ink ejection for ejecting the UV-curing type ink to the print paper (3), and the ultraviolet irradiation device (A) performs the ink curing for curing the ink printed on the print paper (3) immediately following the ink ejection.

Abstract: A plurality of bonding pads formed on a slider are integrally joined to an elastic flexure for a disk drive suspension. The pads are ultrasonically bonded to the slider with leads that are held by the flexure. The bonding portions of the leads face and are pressed against the pads with ultrasonic waves. The leads are plastically deformed during these steps to prevent the flexure from being deformed after the ultrasonic bonding process.

Abstract: An ultraviolet radiation curable ink is provided, which does not make the printed image hazy or blurred, and does not drip or leak from the ink container or printing drum, hence being excellent in both printability and operability. The ultraviolet radiation curable ink comprises an ultraviolet radiation curable resin monomer or oligomer as a varnish, and the ink has a viscosity of 2.0 to 13.0 Pa·s measured at a shear rate of 100 (l/s) at 23° C., and has an yield value of 25 Pa or higher at 23° C. The ink can contain a viscosity regulator, for example, as a powder. It is preferable that the content of powdery ingredients in the ink is 30 wt % or less based on the total weight of the ink.