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3942results about "Inking apparatus" patented technology

Liquid circulation apparatus, image forming apparatus and liquid circulation method

A liquid circulation apparatus includes: a plurality of liquid ejection elements each of which includes a nozzle, a pressure chamber which is connected to the nozzle and accommodates liquid, and a piezoelectric element which displaces a wall of the pressure chamber to eject the liquid in the pressure chamber through the nozzle; a plurality of individual supply channels which are respectively connected to the liquid ejection elements; a common supply channel which is connected to the individual supply channels, the liquid being supplied from the common supply channel to the liquid ejection elements through the individual supply channels; a plurality of individual circulation channels which are respectively connected to the liquid ejection elements; a common circulation channel which is connected to the individual circulation channels, the liquid being circulated from the liquid ejection elements to the common circulation channel through the individual circulation channels; and a control device which controls a circulation volume of the liquid circulated from the liquid ejection elements to the common circulation channel, by adjusting a supply volume of the liquid supplied from the common supply channel to the liquid ejection elements in accordance with an ejection volume of the liquid ejected from the liquid ejection elements.
Owner:FUJIFILM CORP

Color laser printer

A color laser printer producing a color image using a single laser scanning unit includes a lighting unit including first and second laser diodes emitting beams of one polarization, a polarization prism transmitting or reflecting incident beams depending on a direction of polarization, and third and fourth laser diodes disposed in a different direction from the first and second laser diodes with respect to the polarization prism, a rotary polygon mirror that reflects the beam emitted along the same path from the lighting unit, an f-θ lens that focuses the beam reflected by the rotary polygon mirror, first and second polarization beam splitters, each of which transmits or reflects the beam passing through the f-θ lens depending on the direction of the polarization, and first through fourth photoconductive units on which the beams reflected and transmitted through the first and second polarization beam splitters are incident. In the color laser printer, lengths of optical paths between the f-θ lens and each of the first through fourth photoconductive units are equal. The color laser printer is constructed such that a plurality of light sources emitting the beams of one polarization are arranged separately and the beams emitted from the light sources are combined by the polarization prism to enter the f-θ lens, thereby reducing a thickness of the f-θ lens.
Owner:HEWLETT PACKARD DEV CO LP
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