Abstract: A method of cleaning an image retainer by removing remaining toner particles from the retainer after transferring a multi-color toner image which is obtained by a multi-color toner image forming process wherein charging, image writing-in, and developing steps are repeated at least twice, abutting a cleaning member against the retainer after a final image writing-in step of the image forming process has been completed, and releasing the cleaning member from abutment after the cleaning has been completed but not during the image writing-in step for forming a next multi-color toner image.

Abstract: A method of preparing a light sensitive silver halide phtographic material is disclosed. The photographic material comprises a polyester support having a hydrophobic polymer layer containing a vinylidene chloride copolymer and at least one hydrophilic polymer layer. The method comprises steps of coating a hydrophilic polymer layer onto the polyester support, drying the layer until a water content of the layer reaches 60 wt %, and contacting the layer with air having a relative humidity of 5 to 25% for a period 5 seconds to 10 minutes. The photographic material according to the method has such a physical characteristics as dimensional stability for long time storage or anti-cracking of the photographic layer at the preparation period. It is suitable for printing use.

Abstract: There is disclosed a coupler for photography of the formula (I): ##STR1## wherein R.sub.1 and Y each represent a hydrogen atom or a substituent; R.sub.2 represents a substituent; n represents an integer of 0 to 4, and when n is 2 or more, plural number of R.sub.2 's may be the same or different; X represents a hydrogen atom or a substituent which is eliminated by the reaction with the oxidized product of a color developing agent.

Abstract: Disclosed is a reflective support for photography, comprising a polyester film containing titanium oxide particles, wherein the particle size distribution of the titanium oxide particles with particle sizes of 0.05 .mu.m or more satisfies the formula shown below:N/.gamma..gtoreq.50 (I)N: number of the titanium oxide particles with particle sizes of 0.05 .mu.m within 10 .XI.m.times.10 .mu.m area in a transmission type electronmicrography photographed on a film sliced into a thin strip of about 2,000 .ANG. thick;.gamma.: the ratio of d.sub.80 to d.sub.20 when the particle distribution of the titanium oxide particles is measured by the above transmission type electronmicrography photographed:.gamma.=d.sub.80 /d.sub.20d.sub.80, d.sub.20 : respective particle sizes (.mu.m) when the integrated distribution of number of titanium oxide particles is 80% and 20%. Disclosed is also a photographic printing paper comprising the reflective support.

Abstract: There is disclosed the method of preparing a magnetic recording medium having an improved running durability and the excellent electromagnetic conversion characteristics, wherein the magnetic paint for a magnetic layer is prepared by the steps of:kneading the ferromagnetic powder of 100 parts by weight, the first binder of 3 to 15 parts by weight, and a solvent of 10 to 60 parts by weight under a load of a power consumption of 0.05 to 0.5 KW per kg of the ferromagnetic powder to prepare a mixture thereof;kneading the second binder and the mixture under the load of the same power consumption to prepare a coating solution.

Abstract: A silver halide photographic material that contains at least one compound represented by the general formula (2) shown below and at least one compound selected from the group consisting of the compounds represented by the general formulas (3) and (4) shown below: ##STR1## The constituents in the above formulas are clearly defined in the instant specification and claims.

Abstract: An air flow control system for an image recording apparatus such as electrophotographic copying machines, includes an image recording device on which an electrostatic image is formed on the surface of a rotational image retainer. This image is developed to obtain a toner image. The toner image is then transferred to a recording medium which is brought into contact with the image forming surface, and the recording paper is then carried to a fixing device by a carrier device. A first suction inlet is positioned to prevent dispersion of the toner used in developing the toner image. A second suction inlet is positioned in the carrier device to provide suction to carry the recording medium. Air flow is dynamically controlled for both the first and second suction inlets, depending on whether a detector senses the presence or absence of the recording medium.

Abstract: A magnetic recording medium is disclosed. The surface of the magnetic layer has a Ns/Ns(t) ratio of 0.10 to 0.35, wherein the Ns is a number of spikes protruding from an average line of a surface roughness cross section curve by not less than 0.01 .mu.m and the Ns(t) is a total number of spikes protruding from the average line. The medium is improved in electromagnetic characteristics, contamination of magnetic head and rubbing noise.

Abstract: Silver halide photographic material having a hydrophilic colloidal layer that contains at least one cyanine dye with a 3H-pyrolopyridine, 4H-thienopyrrole, 6H-thienopyrrole, 4H-furopyrrole or 6H-furopyrrole nucleus which has in its dye molecule at least two acid groups or at least two substituents each having at least one --CH.sub.2 CH.sub.2 OR group (where R is a hydrogen atom or an alkyl group).

Abstract: A disposal device for photographic processing waste liquor which concentrates the photographic process waste liquor by evaporation. The disposal device has a gas detecting device for detecting gas which may be generated during the evaporation of the waste liquor and a control device for stopping the evaporation based on the detection of a concentration of a specific gas. The processing method for photographic waste liquor involves evaporating the waste liquor to concentrate it and detecting gases which are generated during the evaporation process. When the concentration of a specific gas reaches a certain level, the evaporation step is halted.

Abstract: A developing apparatus for supplying a developer to a photoreceptor so that an electrostatic latent image on the photoreceptor is developed with the developer. The developing apparatus comprises a developer conveyer, having a rigid surface, for conveying the developer to a developing zone; a developer layer-thickness regulator, shaped like a bar and having a rigid surface portion of the curvature radius between 0.5 mm and 15 mm, for regulating the thickness of the developer to be conveyed to the developing zone; and a supporter for supporting the developer layer-thickness regulator.

Abstract: A spool for winding a photographic roll of film in a camera. The spool includes a shaft having a slit formed by opposed walls one of which has a protrusion extending into the slit and positioned between two ribs of the other wall. The protrusion is received in a perforation of the film tongue to wind the film when the spool is turned in a winding direction. When the film is unwound, the film tongue smoothly and reliably slips out of the slit as the perforation wall slides down an angled wall of the protrusion so that the film is released from the spool.

Abstract: A method of improving a magnetic recording medium in the physical and electromagnetic properties is disclosed. The method is comprised, in combination, of the steps of:making a support of one selected from the group consisting of polyehtylene naphthalate and polyehtylene terephthalate;providing on the support, a magnetic recording layer comprising a ferromagnetic metal powder, a carbon black, a lubricant, an abrasive and a binder;providing on the opposite side of the magnetic layer, a back coating layer comprising a carbon black, non-magnetic particles and a binder;wherein the Young's modulus of said magnetic recording medium in a traveling direction is not less than 1100 kg/mm.sup.2.

Abstract: A method for reading a radiographic image by irradiating an image storage panel having a layer formed by vacuum evaporation and containing a stimulable alkali halide binderless phosphor. The irradiation takes place with an excitation ray at an oblique angle to a line normal to the panel and the phosphor comprises a pile-like structure. The method produces sharper images and improved sensitivity.

Abstract: A material for packaging light-sensitive materials having a light-shielding film with a thickness of 30-150 .mu.m comprised of a thermoplastic resin containing 5-25 wt % of an ethylene-propylene based rubber having a Mooney viscosity of 10-100 [ML 1+4 (100.degree.C.)] and an iodine value of 20 (I.sub.2 g/100 g EPFDM) and 1.2-10 wt % of carbon black.

Abstract: Disclosed is an image processing apparatus for processing digital color image data, wherein there are provided an image input circuit for introducing color image signal into a conversion circuit which generates digital color image data including color data and density data, a data processing circuit which includes a plurality of image processing circuits for processing the color data and the density data, and wherein latch circuits are further provided to each of the plurality of image processing circuits so that the color code data and the density data are respectively latched every after passing through the plurality of image circuit.

Abstract: A silver halide photographic light-sensitive material is disclosed, which contains a novel yellow coupler in its silver halide emulsion layer. The yellow coupler is represented by the following Formula I: ##STR1## wherein Y is a hydrogen bond donating group; R is an alkyl group, an aryl group or a heterocyclic group; R.sub.3 is a halogen atom, a hydroxyl group, a nitro group or a monovalent organic group; m is an integer of 0 to 4, provided that the groups represented by R.sub.3 may be the same or different when m is 2 or more; and Z is a hydrogen atom or a substituent capable of splitting off upon reaction with the oxidation product of an aromatic primary amine color developing agent.

Abstract: A silver halide photographic light-sensitive material containing a novel cyan coupler is disclosed. The cyan coupler is represented by the following Formula I: ##STR1## wherein A represents an organic group; X represents a hydrogen atom or a group capable of splitting off upon a reaction with an oxidation product of a color developing agent; Z represents the group of atoms capable of forming a five or six-membered heterocyclic ring together with carbon and nitrogen atoms; Y represents a linkage group; and R represents a hydrogen atom or an organic group.

Abstract: A photoreceptor comprising a photosensitive layer and a support, wherein said photosensitive layer contains a polycarbonate compound binder selected from the group consisting of Formula A and B, ##STR1## wherein R.sub.1 and R.sub.2 are independently hydrogen, substituted or unsubstituted aliphatic, or a substituted or unsubstituted hydrocarbon ring, provided that at least one of R.sub.1 and R.sub.2 has at least 3 carbon atoms, Z represents a group of atoms necessary to constitute a substituted or unsubstituted carbon ring or a substituted or unsubstituted heterocylic ring, R.sub.3 to R.sub.10 in Formulas A and B are independently hydrogen, halogen, substituted or unsubstituted aliphatic, or a substituted or unsubstituted hydrocarbon ring, and n is a number from 10 to 1000.