Abstract: A photoconductive composition comprising at least one disazo compound represented by the following general formula (I): ##STR1## wherein X, L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5, L.sub.6, A, m and n are as defined in the description and an electrophotographic light-sensitive material containing the disazo compound are disclosed.The disazo compound is effective for improving both sensitivity and durability of the light-sensitive material.

Abstract: A process for producing toner, which comprises dispersing a monomer system comprising a polymerizable monomer and a polar polymer in a dispersion medium containing a dispersant having a charging polarity opposite to that of said polar polymer, and subjecting said monomer system to the suspension polymerization. By this process, toner particles excellent in fixing characteristic, developing characteristic and abrasion resistance can be obtained with a narrow particle size distribution.

Abstract: A method of purging an excess of a liquid developer in an electrophotographic apparatus including the steps of pressing an electrophotosensitive film formed with an electrostatic latent image against an opening of a developing chamber to close the opening, supplying the liquid developer into the developing chamber to toner-develop the electrostatic latent image, discharging the liquid developer, and supplying gas under pressure into the developing chamber to purge the liquid developer remaining in the developing chamber as well as excess of the liquid developer attaching to the electrophotosensitive film. In the method, the flow rate of the gas at the surface of the electrophotosensitive film may be changed according to a predetermined time chart so that the excess of the liquid developer remaining after the process of development can be quickly purged without degrading the picture quality.

Abstract: Disclosed is an improved layered photoresponsive imaging member comprised of a supporting substrate; a vacuum evaporated photogenerator layer comprised of a perylene pigment selected from the group consisting of a mixture of bisbenzimidazo(2,1-a-1',2'-b)anthra(2,1,9-def:6,5,10-d'e'f')diisoquinoline -6,11-dione, and bisbenzimidazo(2,1-a:2',1'-a)anthra(2,1,9-def:6,5,10-d'e'f')diisoquinoline -10,21-dione, and N,N'-diphenyl-3,4,9,10-perylenebis(dicarboximide); and an aryl amine hole transport layer comprised of molecules of the following formula: ##STR1## dispersed in a resinous binder and wherein X is selected from the group consisting of halogen and alkyl.

Abstract: A xerographic system which makes two, or more, copies for each exposure by developing the image twice. This can be done by either providing two developing, drying and transfer stations within the system, or by reversing the direction of the exposed plate so that it is processed twice by these stations. This technique is possible because a large part of the image remains on the plate after the first development cycle.

Abstract: Disclosed is a method of forming a trench pattern in a ceramic green sheet for subsequently filling with a conductive paste resulting in a fully inlaid conductor pattern therefrom. Starting with a green sheet, a high contrast ink drawing of the desired conductor pattern is formed thereon. The drawing may be formed by direct printing on the green sheet or by first printing it on a flexible substrate such as paper and then transferring by xerography to the green sheet. Next, the green sheet is illuminated with an intense noncoherent light source to cause a high degree of absorption of the light energy by the inked areas and volatilization of the green sheet binder material thereunder, thereby forming a trench pattern conforming to the drawn pattern.

Abstract: A photoconductive film comprises an azulenium salt represented by the general formula (1) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 are each independently hydrogen, halo or a monovalent organic residue; or at least one of the combinations of R.sub.1 with R.sub.2, R.sub.3 with R.sub.4, R.sub.4 with R.sub.5, R.sub.5 with R.sub.6, and R.sub.6 with R.sub.7 may form an unsubstituted or substituted aromatic ring; R.sub.8 and R.sub.9 are each independently unsubstituted or substituted alkyl, aryl, or aralkyl; or R.sub.8 and R.sub.9, together with the nitrogen atom to which they are attached, may be joined to form an aromatic ring; R.sub.10, R.sub.11, R.sub.12, and R.sub.13 are each independently hydrogen, halo, alkyl, alkoxy, or hydroxyl; and n is 0, 1, or 2.

Abstract: A liquid developer for electrostatic photography is described, containing, (i) a toner containing a resin as a main component and (ii) a copolymer comprising two repeating units represented by formula (Ia) or (Ib) and formula (II): ##STR1## or a copolymer comprising three repeating units represented by formula (IIIa) or (IIIb), formula (VI) and formula (V): ##STR2##

Abstract: A toner for electrophotography, comprising an azoic pigment having a silica core as a coloring component, said azoic pigment comprising a core of a fine powder of silica and a coating of a mono- or polyazoic dye chemically bound to the surface of the silica core through an aminosilane coupling agent.

Abstract: A photoconductive member is provided which comprises a substrate and a photoconductive light receiving layer made up of an amorphous material containing silicon atoms and germanium atoms, the light receiving layer containing nitrogen atoms and having a first layer region (1), a third layer region (3), and a second layer region (2) of nitrogen atom distribution concentrations C(1), C(3), and C(2), respectively, in the thickness direction, in that order from the substrate side to the opposite side, wherein C(3) is higher than any of C(2) and C(1) and one of C(1) and C(2) is not zero.

Abstract: The present invention provides a method for triggering a light triggered thyristor (LT.sup.2) which method comprises using a light source to provide background excitation of carriers in at least the amplifying gate areas of the LT.sup.2 prior to triggering the device. The background excitation is of a low level and will not trigger the device or cause excessive leakage current. At the desired time a second light signal is used to trigger the LT.sup.2.

Abstract: An electrophotographic imaging member is described comprising a substrate, a layer comprising an amorphous hole injecting material selected from the group consisting of halogen doped selenium, gold, silver, platinum and carbon black, the halogen doped selenium consisting essentially of selenium and between about 200 parts per million and about 2,000 parts per million by weight halogen, and at least one thermal hole generating selenium alloy photoconductive layer. This electrophotographic imaging member may contain other layers such as a hole transport layer, a layer between the hole transport layer and thermal hole generating selenium alloy photoconductive layer, and a thin protective overcoating layer suitable for Carlson type imaging processes. An electrophotographic imaging process employing this electrophotographic imaging member is also described.

Abstract: Photoconductive film having a photoconductive pigment obtained by silylation of pigment having at least one hydroxy group, and electrophotographic photosensitive member making use thereof.

Abstract: A method for producing an image forming member having a deposited layer with photoconductivity formed on a support by introducing a starting material in gaseous state into a deposition chamber which is reduced to a desired pressure and exciting discharging in the gas atmosphere of said starting material, comprises constituting at least a part of said deposited layer of a layer (A) comprising silicon atoms, carbon atoms and hydrogen atoms, said layer (A) being formed of at least one of the compounds represented by the formula:R.sub.m Si.sub.n H.sub.2n+2-m (I)where R is an alkyl having 1 to 15 carbon atoms, m is an integer of 1 to 15, n is an integer of 1 to 5, and m and n satisfy the relation of 2n+2>m.

Abstract: A microcapsule toner having a colored core material coated successively with a first resin wall and a second resin wall can be provided with both excellent pressure fixing characteristic and physical stability when the first resin wall has affinity to both the core material and the second resin wall, and can suitably be used for electrophotography, electrostatic printing, etc.

Abstract: A liquid electrophoretic developer composition suitable for rendering visible electrostatically charged areas, which composition contains in an electrically insulating non-polar carrier liquid having a volume resistivity of at least 10.sup.9 ohm.cm and a dielectric constant less than 3, dispersed coloring matter acting as toner particles and at least one polymer comprising cationic groups neutralized with counter anions, the said cationic groups being positively charged groups of metal ion containing coordination compounds.

Abstract: An image holding member for electrostatic images or toner images has a three-layered insulating layer at the surface. The insulating layer is composed of an upper layer mainly composed of an organic solvent soluble thermoplastic resin, an intermediate layer mainly composed of an organic solvent soluble thermoplastic resin and a cured thermosetting resin, and a lower layer mainly composed of a cured thermosetting resin.

Abstract: A developing method wherein a developer layer formed on a developer feeding carrier is conveyed, into an oscillating electric field, and an electrostatic latent image on an image retainer is developed by the developer of the developer layer inside the oscillating electric field. The developer has carrier particles and toner particles and the average particle size of the carrier particles is from 5 to 50 .mu.m. The average particle size of the toner particles is up to 20 .mu.m. The carrier particle and the toner particle are sphered.

Abstract: A method of and apparatus for developing an electrostatic latent image wherein an oscillating electric field is formed between a developing member and an electrostatic latent image receptor in synchronism with the rotation of the developing member. A voltage having a waveform obtained by periodically superposing a pulse-like voltage is applied on the developing member.

Abstract: In an electronic component manufacturing system, slices are transported in serial fashion between a plurality of work stations. As the slices move through the system, each work station performs a separate manufacturing operation on each slice. The manufacturing operations are performed in immediate succession and within the same time interval so that the slices are processed rapidly and so that slices do not accumulate between the work stations. The slices are maintained in sequence through the system so that the operation of the system is more easily controlled.