55 results about "Bleeding controls" patented technology

A control strategy for bleeding an anode side of fuel cell stack in a fuel cell system that improves water management and addresses durability and performance concerns. The method includes determining when to begin the anode bleed, typically by estimating or measuring the amount of nitrogen in the anode side of the stack. The method also includes determining when to end the anode bleed based on the volume of gas that has been bled. The method determines the mole flow rate of the anode gas flowing through a bleed valve, integrates the mole flow rate to get the number of moles of the gas that have passed through the bleed valve, determines a desired amount of moles to be bled, and ends the bleed when the actual number of moles of the gas equals the desired number of moles of the gas.

The present invention provides an ink for inkjet printing, comprising an aqueous vehicle, a pigment colorant and an effective amount of 3-butoxypropylamine as a bleed control agent. The ink exhibits reduced intercolor bleed when printed, for example, on plain paper.

An ink jet ink composition comprised an anti-curl agent and ink jet printing processing using such ink jet ink composition. The ink jet ink composition includes a hyperbranched polymer. The hyperbranched polymer acts as an anti-curl agent to control curl during a printing process. The anti-curl agent, i.e., the hyperbranched polymer, may be present in the ink amounts less than conventional anti-curl agents and still effectively control curl without detrimentally effecting intercolor bleed control water fastness or drying. Additionally, the ink composition do not exhibit increases in viscosity, and problems associated therewith, that occur in ink composition using conventional anti-curl agents.

An ink-jet ink which includes a liquid vehicle and a polymer-dispersed pigment dispersed in the liquid vehicle is disclosed and described. More specifically, the polymer-dispersed pigment can include a pigment encapsulated with a polymer having hydrophilic and hydrophobic moieties. The polymer can be a polymerization product of at least a first monomer having a hydrophilic group, and a second monomer having a hydrophobic group. Further, the polymer can be configured such that the polymer-dispersed pigment is stable in the liquid vehicle at a pH of from about 5.5 to about 8.5. Such polymer-dispersed pigments allow for formation of ink-jet inks with improved options for bleed control mechanisms and increased reliability of ink-jet architecture.

The invention provides a silicon-controlled dimming LED drive circuit. The source electrode of a bleeding switch MOS transistor is connected with the circuit ground through a resistor, the drain electrode of the bleeding switch MOS transistor is connected to the voltage signal end of a bus through a bleeding resistor, and the grid electrode of the bleeding switch MOS transistor is connected with the circuit ground through a second capacitor and is also connected with the output end of a first switch of a bleeding control module through a resistor. A first sampling resistor is coupled between the bleeding switch MOS transistor and the first input end of a comparator of the bleeding control module so as to obtain a first sampling voltage signal. The bleeding control module receives the first sampling voltage signal through the first input end of the comparator, compares the first sampling voltage signal with the voltage signal of a reference voltage source and controls switching-on and switching-off of the first switch, so that the bleeding switch MOS transistor is driven to control the minimum input current of the LED drive circuit, and therefore the holding current of a silicon-controlled dimmer is controlled. Through the intelligent control by the bleeding control module, the input current of the LED drive circuit can meet the requirement for the holding current of the silicon-controlled dimmer.

The invention provides an ink for inkjet printing, comprising a self-dispersing pigment colorant and a bleed control agent selected from the group consisting of catechol, 4-methylcatechol and any combination thereof. The ink advantageously exhibits reduced intercolor bleed when printed, for example, on plain paper.