摘要:
Polymer electrolyte membranes for use in fuel cells are produced by first graft polymerizing acrylic acid derivatives or vinylketone derivatives as monomers on polymer substrates and by then performing selective conversion to a sulfonic acid group of hydrogen atoms on the carbon atom adjacent to the carbonyl in the ketone or carboxyl group on the graft chains.
摘要:
The present invention provides a colorant dispersion for a recording ink containing at least a dispersant, a colorant, and water, wherein the dispersant is a polycarboxylic acid dispersant containing units represented by formulae (1) to (3): where R1, R2, and R4 are selected from a hydrogen atom and CH3; R3 is selected from a hydrogen atom and a C1-C3 alkyl group; R5 represents a C1-C3 alkyl group; AO and BO represent a C2-C3 oxyalkylene group; M is selected from alkali metal, alkali earth metal, ammonium, and organic amine; m represents an integer of 1 to 30; and n represents an integer of 5 to 50.
摘要:
An image forming apparatus forms a plurality of tone patterns of different colors, each of which containing a plurality of toner patches having different toner densities. Some of the toner patches in each of the tone patterns are formed with a predetermined fixed developing bias and the rest of the toner patches in each of the tone patterns are formed with developing biases set based on previous developing biases that have been obtained through a previous control process. The largest toner density of the toner patches in each of the tone patterns is determined based on a magnitude relation of previous index values obtained through the previous control process.
摘要:
A technology is disclosed by which, when plural content data are successively transmitted from a server apparatus to a reproduction apparatus through a client apparatus, if the transmission is interrupted, the transmission of the content data can be resumed from the point at which the transmission is interrupted. The transfer device includes a storage section for storing a transmission object list including content identification information corresponding to plural content data to be transmitted from a server apparatus to a reproduction apparatus connected to a client apparatus through the client apparatus. A reception section successively receives the content data from the server apparatus. A transmission section successively transfers the successively received content data to the reproduction apparatus. A control section deletes, every time content data is transferred, the corresponding content identification information from the transmission object list stored in the storage section.
摘要:
The present invention provides an inkjet recording ink containing at least a pigment dispersion liquid A containing at least a first carbon black, a dispersant, and water, and a self-dispersible pigment dispersion liquid B which contains a second carbon black having a surface functional group, wherein a mass ratio (Ac:Bc) of the amount of the first carbon black (Ac) in the pigment dispersion liquid A to the amount of the second carbon black (Bc) having a surface functional group in the self-dispersible pigment dispersion liquid B is 98:2 to 50:50.
摘要:
An image forming apparatus is disclosed that includes an image density control unit that performs control operations based on an image density control condition that is adjustably set to control an output image to have a predetermined image density, an image density control condition modifying unit that calculates a modified image density control condition based on information on an amount of toner exchanged at a developing apparatus within a predetermined period and a parameter for image density control condition calculation and sets the modified image density control condition as the image density control condition to be used by the image density control unit, and a parameter modifying unit that modifies the parameter for image density control condition calculation used by the image density control condition modifying unit based on a toner pattern detection result obtained by detecting a toner pattern formed on a belt member.
摘要:
An image forming apparatus and an image density control method for controlling image density in the image forming apparatus, involving adjusting a toner concentration control reference value in accordance with an amount of the toner replaced in a developing device so as to adjust the image density to maintain a consistent developability and changing image forming intervals in accordance with an amount of the toner replaced in the developing device during continuous printing operation.
摘要:
An image forming apparatus includes an image carrier configured to carry an electrostatic latent image, a developing device configured to develop the electrostatic latent image with a two-component developer including toner and magnetic carrier, a toner supplier configured to supply the toner to the developing device, a toner concentration detector configured to detect toner concentration in the two-component developer inside the developing device, and a controller. The controller is configured to detect first information to determine toner replacement amount in the developing device during a predetermined time period and second information to determine a charge characteristic of the toner in the developing device, change a toner concentration control reference value based on the first information and the second information, and control the toner concentration based on an output from the toner concentration detector and the toner concentration control reference value.
摘要:
An inkjet recording ink which contains: a carbon black; a dispersant; resin emulsion; and water, in which the resin emulsion contains a resin which is at least one of a urethane resin and a styrene-acryl resin, and the ink satisfies the following relationship: 20≦B−A≦50, where A(nm) represents a particle diameter D90 of particles contained in dispersion containing the carbon black, the dispersant, and water, which is before added with the resin emulsion, and B(nm) represents a particle diameter D90 of particles contained in the ink.
摘要:
The present invention provides a colorant dispersion for a recording ink containing at least a dispersant, a colorant, and water, wherein the dispersant is a polycarboxylic acid dispersant containing units represented by formulae (1) to (3): where R1, R2, and R4 are selected from a hydrogen atom and CH3; R3 is selected from a hydrogen atom and a C1-C3 alkyl group; R5 represents a C1-C3 alkyl group; AO and BO represent a C2-C3 oxyalkylene group; M is selected from alkali metal, alkali earth metal, ammonium, and organic amine; m represents an integer of 1 to 30; and n represents an integer of 5 to 50.