Ricoh Company, Ltd.

Masataka Yoshiike

Masaki Kato

Keisuke Hayashi

Takashi Kinokuni

Hitoshi Usami

Aki Takahashi

A liquid discharge head includes a plurality of nozzles to discharge liquid, a plurality of individual liquid chambers communicating with the plurality of nozzles, respectively, a common liquid chamber to supply the liquid to the plurality of individual liquid chambers, and a liquid supply member including a liquid supply channel to supply the liquid to the common liquid chamber. The liquid supply member includes a first member including a part of the liquid supply channel, a second member including a gas chamber, and an elastic member disposed between the first member and the second member and forming a wall of the liquid supply channel of the first member and a wall of the gas chamber of the second member. The gas chamber of the second member is disposed opposite the liquid supply channel of the first member via the elastic member.

Liquid discharge head, liquid discharge device, liquid supply member, and liquid discharge apparatus

A liquid discharge head includes a nozzle plate, a channel substrate, a common-liquid-chamber substrate, an adhesive, and a sealant. The nozzle plate includes a plurality of nozzles to discharge liquid. The channel substrate includes a plurality of individual liquid chambers communicated with the plurality of nozzles. The common-liquid-chamber substrate includes a common liquid chamber to supply the liquid to the plurality of individual liquid chambers. The adhesive bonds two of the nozzle plate, the channel substrate, and the common-liquid-chamber substrate. The adhesive faces a channel through which the liquid flows. The sealant surrounds the adhesive at an opposite side of the channel relative to the adhesive.

Liquid discharge head, liquid discharge device, and liquid discharge apparatus

A liquid discharge head includes a head body, a cover, a rib, and a sealer. The head body discharges liquid. The head body includes a frame. The cover is mounted on the frame of the head body. The rib is disposed at the frame along a peripheral surface of the cover. The sealer is disposed between the peripheral surface of the cover and a peripheral surface of the rib.

A liquid discharge head includes an actuator substrate, a holding substrate, a common-liquid-chamber substrate, and a vibration absorber. The actuator substrate includes a plurality of individual liquid chambers and a plurality of pressure generating elements. The individual liquid chambers are communicated with a plurality of nozzles to discharge liquid. The pressure generating elements are arrayed to pressurize liquid in the individual liquid chambers. The holding substrate includes a recessed portion to accommodate the pressure generating elements. The common-liquid-chamber substrate includes a common liquid chamber to supply the liquid to the individual liquid chambers. The common-liquid-chamber substrate is bonded to the holding substrate. The vibration absorber is disposed at at least a part of a bonded portion of the common-liquid-chamber substrate and the holding substrate, to absorb vibration. The holding substrate has an opening as a channel communicating the individual liquid chambers with the common liquid chamber.

A head unit includes a plurality of heads; and a head mount on which the plurality of heads is arrayed. The head mount includes a position adjuster to adjust a position of each of the plurality of heads, each of the plurality of heads includes cutouts at both ends of each of the plurality of heads in a head alignment direction, the cutouts of adjacent heads are opposed each other, and the position adjuster is disposed between the opposed cutouts of the adjacent heads.

Head unit and liquid discharge apparatus including same

A head device includes a head and a head holder. The head includes a reference face, a first opposing face, and a second opposing face. The head holder is joined to the head. The head holder includes a reference face contacting the reference face of the head, a first opposing face opposing the first opposing face of the head to form a first space, and a second opposing face opposing the second opposing face of the head to form a second space. The second space is smaller than the first space in a mounting direction in which the reference face of the head is brought into contact with the reference face of the head holder. The head is joined to the head holder with adhesive filled in each of the first space and the second space.

Head device, apparatus incorporating the head device, liquid discharge device, and apparatus for discharging liquid

Disclosed is a liquid discharge head including a nozzle plate including plural nozzles that discharge liquid droplets; a flow channel member that forms plural individual liquid chambers, the plural individual liquid chambers communicating with the corresponding nozzles; and a frame member that forms a common liquid chamber that supplies a liquid to the plural individual liquid chambers. The frame member covers a first outer circumferential surface of the nozzle plate and a second outer circumferential surface of the flow channel member. The frame member includes a protecting portion that covers a peripheral portion of a surface of the nozzle plate, where the protecting portion is made molten and adhered to the surface of the nozzle plate.

Liquid discharge head and image forming apparatus

Disclosed is a liquid ejecting head, including two nozzle sequences, each nozzle sequence including nozzles for ejecting a liquid drop, separate liquid chambers communicating with the nozzles, and two common liquid chambers for supplying a liquid to the separate liquid chambers and correspond to the two nozzle sequences, each common liquid chamber including a supply port for supplying a liquid thereto, an aperture, a cross-section thereof in a second direction orthogonal to a first direction of arrangement of the plural nozzles decreasing toward an end portion thereof in the first direction, wherein the supply port and aperture of one of the two common liquid chambers are provided at one end portion and the other end portion in the first direction, respectively, and the supply port and aperture of another one are provided at the other end portion and the one end portion in the first direction, respectively.

Liquid ejecting head and image forming apparatus

A liquid tank includes a vent-to-atmosphere mechanism configured to open and close a vent-to-atmosphere passageway for venting an internal reservoir space connected to a liquid spray head to atmosphere, the vent-to-atmosphere mechanism including a cylindrical member, a valve seat disposed inside the cylindrical member, a valve plug disposed inside cylindrical member and movable to come in contact with or separate from the valve seat, a movable member disposed inside the cylindrical member on an atmosphere side of the valve plug in a slidable manner to cause a movement of the valve plug, the movable member having an outer surface in movable contact with an inner surface of the cylindrical member and having a communication passageway formed therethrough for communication with atmosphere, and a filter member disposed at the communication passageway to capture foreign material.

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Kanagawa, Japan

Masataka Yoshiike