Abstract: A catalyst packing apparatus with which a desired packed density can be easily and surely obtained by use of a suspended type catalyst ejector, wherein correlated data giving a scattering height from which a desired packed density can be obtained has been determined and stored beforehand in a memory part 74, and by setting a desired packed density, prior to the scattering of catalyst, a selecting part 75 selects a scattering height corresponding to the desired packed density from the correlated data in the memory part 74 and delivers the same to an adjusting part 76 which controls the catalyst ejector 30 so as to obtain this scattering height, thereby the catalyst 11 in a reaction tower 10 can be packed at the desired packed density.

Abstract: Provided are a catalyst packing method and a catalyst packing apparatus with which a desired packed density can be easily and surely obtained by use of a suspended type catalyst ejector, wherein correlated data giving a scattering height from which a desired packed density can be obtained has been determined and stored beforehand in a memory part 74, and by setting a desired packed density, prior to the scattering of catalyst, a selecting part 75 selects a scattering height corresponding to the desired packed density from the correlated data in the memory part 74 and delivers the same to an adjusting part 76 which controls the catalyst ejector 30 so as to obtain this scattering height, thereby the catalyst bed 11 in a reaction tower 10 can be packed at the desired packed density.

Abstract: A rotation driving system drives unitedly and rotatably sprinkle rotors, which the disk sprinkle rotors having plural partitive members extending in predetermined distances in a radial direction to the rotating axis are arranged in multistage state with a predetermined distance in a longitudinal direction. In the aforementioned state, by supplying the catalyst to the center of the sprinkle rotor, the catalyst is fed into a reaction tank while releasing in a radial direction of the sprinkle rotor. When the catalyst is fed, a rotation frequency of the sprinkle rotor is defined to be a speed constituent in a radial direction of over zero when the catalyst settles down and to be periodically changed between a maximum rotation frequency and a minimum rotation frequency.

Abstract: A method for measuring and analyzing interference fringes using a hologram interferometer. The hologram interferometer is provided with a holographic optical element which includes a first pattern for diffracting a laser beam as a reference beam in a direction which is different from the surface of an object to be measured and a second pattern for diffracting a laser beam as a measuring beam which is to be radiated onto the surface to be measured, and measures interference fringes resulting from interference between the reference beam and the beam reflected from the measured surface of the object. Interference fringes are measured while the phase of the interference fringes is successively changed by moving the holographic optical element parallel to a surface thereof by given amounts in a direction normal to the gratings of the first pattern, and the configuration of the measured surface is obtained by analyzing the fringes.

Abstract: A negative type photosensitive electrodepositing resin composition comprising (a) a polymer obtained by neutralizing a copolymer of acrylic or methacrylic acid and having an acid number of 20 to 300 with a basic organic compound, (b) a non-water-soluble monomer having two or more photopolymerizable unsaturated bonds in the molecule, (c) a non-water-soluble photoinitiator, and (d) a benzotriazole derivative having one or more carboxyl groups, is effective for giving electrodeposited films with a low voltage or low electric current in a short time, and usable for forming resist patterns with high degree of resolution.

Abstract: A reflecting master hologram is illuminated with collimated coherent beams at an incident angle to provide regular reflected beams and diffracted beams. The regular reflected beams and the diffracted beams are directed to a reflective photoresist plate at the same angles as those at which they are, respectively, reflected by the reflecting master hologram so as to form an intensity pattern, i.e. a bright and dark pattern, of interference fringes on the reflective photoresist plate. The exposed photoresist plate is developed and etched to form a reflective hologram on the plate.

Abstract: A photopolymerizable composition comprising: (a) 100 parts by weight of a compound having at least one ethylenically unsaturated group, (b) 0 to 400 parts by weight of a thermoplastic organic polymer and (c) 0.01 to 20 parts by weight of a photoinitiator, characterized in that an acridine compound of the following general formula (I) is used as the photoinitiator: ##STR1## wherein R represents an alkylene, oxadialkylene or thiodialkylene group having 2 to 20 carbon atoms,and a photopolymerizable element comprising a layer of the photopolymerizable composition formed on a support.

Abstract: Acridine compounds such as 1,4-butylenebis-.beta.-(acridin-9-yl)acrylate, or the like, are high in light sensitivity and suitable as a photopolymerization initiator.

Abstract: A substituted acridine derivative represented by ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are independently hydrogen atoms, alkyl groups, substituted alkyl groups, aryl groups, substituted aryl groups, halogen atoms, or alkoxy groups, and Z.sub.1 is a six-membered heteroaromatic group which has one or two nitrogen atoms in its ring and may have an alkyl substituent having 1 to 8 carbon atoms, or a quinolyl group; and a photopolymerizable composition comprising 0.01 to 10 parts by weight of said derivative, 100 parts by weight of a photopolymerizable compound having a boiling point of 100.degree. C. or higher at atmospheric pressure and at least one kind of ethylenic unsaturated group, and 0 to 400 parts by weight of a thermoplastic organic polymer.

Abstract: Acridine compounds such as 1,4-butylene-bis-.beta.-(acridin-9-yl)acrylate, or the like are high in light sensitivity and suitable as a photopolymerization initiator.

Abstract: A photosensitive resin composition comprising (A) a carboxyl group-containing film-forming property imparting polymer, (B) a copolymerizable vinyl compound, (C) a photopolymerization initiator, and (D) a 1,2,3-benzotriazole derivative is useful for forming a photosensitive film excellent in resistance to plating and stability.