Abstract: A curing agent containing a pyridinium salt, in which the pyridinium salt has a benzyl group at a 1-position and has an electron-withdrawing group at a 2-position, and the benzyl group has an electron-donating group. An adhesive composition containing a pyridinium salt and a cationic polymerizable compound, in which the pyridinium salt has a benzyl group at a 1-position and has an electron-withdrawing group at a 2-position, and the benzyl group has an electron-donating group. An adhesive film for circuit connection including an adhesive layer formed from the adhesive composition.

Abstract: A powder collecting and transporting device can collect powder left on a conveyer after the powder is sprinkled on cakes and bread into a laterally elongated powder container, and transport the powder in the container to a desired location by air suction. The device includes a hopper having an elongated powder discharge opening at its bottom portion and a cylindrical frame fluidly connected to the bottom portion. In the cylindrical frame, a suction pipe is rotatably provided. The suction pipe has an end portion in communication with a suction device. The suction pipe is formed with a slit at its peripheral surface. The slit forms a spiral line making one round along the longitudinal axis of the suction pipe. A part of the spiral slit is in alignment with the discharge opening to provide a suction port having small area for providing fluid communication between the hopper and the suction pipe.