Canon Kabushiki Kaisha

Ichiro Endo

Shigeru Ohno

Hajime Kobayashi

Yasushi Sato

Seiji Saito

Takashi Nakagiri

Yasuhiro Yano

Toshiyuki Komatsu

Kikuo Kinjo, Deceased

Hiroshi Ito

Yoshio Takasu

Tsuyoshi Eida

Eiichi Inoue

Shigetaro Ogura

Nobuhiro Takekawa

Takao Muramatsu

Teruo Yamanouchi

Noriko Hasegawa

Bubble jet recording is performed using a recording head with an orifice for projecting liquid. A liquid path with a plurality of electrothermal transducers is in fluid communication with the orifice. The transducers are selectively driven to change the amount of liquid ejected from the orifice.

Bubble jet recording with selectively driven electrothermal transducers

A recording apparatus comprises an inlet for accepting a liquid to be delivered to an outlet orifice through a liquid flow path. Liquid is supplied to the inlet for flow through the liquid flow path to a heating element, which heats liquid in the liquid flow path. Heating is sufficient to cause a change of state of the liquid (that is, to generate a bubble) and produce a force acting on the liquid which overcomes the surface tension of liquid at the orifice and thereby projects a droplet of liquid from the orifice. The temperature of the heating element is raised at each actuation to a temperature above the maximum temperature at which the liquid in the liquid flow path is subjected only to nucleate boiling so as to promote substantially instantaneous transfer of heat to the liquid proximate to the heating element and to retard the transfer of heat from the heating element to liquid at other locations in the liquid flow path. A processing circuit changes either the size or number of the projected droplets to effect tone gradation recording.

Bubble jet recording apparatus with processing circuit for tone

A recording apparatus for recording an image sensed by a photosensor comprises an inlet for accepting a liquid to be delivered to an outlet orifice through a liquid flow path. Liquid is supplied to the inlet for flow through the liquid flow path to a heating element, which heats liquid in the liquid flow path in response to signals received by the photosensor. Heating is sufficient to cause a change of state of the liquid (that is, to generate a bubble) and produce a force acting on the liquid which overcomes the surface tension of liquid at the orifice and thereby projects a droplet of liquid from the orifice. The temperature of the heating element is raised at each actuation to a temperature above the maximum temperature at which the liquid in the liquid flow path is subjected only to nucleate boiling so as to promote substantially instantaneous transfer of heat to the liquid proximate to the heating element and to retard the transfer of heat from the heating element to liquid at other locations in the liquid flow path.

Recording apparatus which projects droplets of liquid through generation

Liquid droplets are formed by instantaneous state change by thermal energy of a liquid filled in a thermal chamber, said droplets being deposited onto a recording member to achieve recording.

Bubble jet recording apparatus actuated by interface means

A bubble jet recording apparatus comprises an inlet for accepting a liquid to be delivered to an outlet orifice through a liquid flow path. Liquid is supplied to the inlet for flow through the liquid flow path to a heating element, which heats liquid in the liquid flow path in response to recording signals. Heating is sufficient to cause a change of state of the liquid (that is, to generate a bubble) and produce a force acting on the liquid which overcomes the surface tension of liquid at the orifice and thereby projects a droplet of liquid from the orifice. The temperature of the heating element is raised at each actuation to a temperature above the maximum temperature at which the liquid is heated so as to promote substantially instantaneous transfer of heat to the liquid proximate to the heating element and to retard the transfer of heat from the heating element to liquid at other locations in the liquid floor path.

Bubble jet recording apparatus which projects droplets of liquid through

Bubble jet recording method and apparatus in which a heating element

A liquid jet recording process comprises the step of providing a continuous passageway defining a path through which liquid can flow. The passageway has an inlet thereto and an outlet orifice therefrom and further defines a thermal chamber portion located directly in the path intermediate the inlet and the outlet orifice and spaced upstream from the outlet orifice. Liquid is supplied to the passageway to fill it and an input signal is generated each time it is desired to produce a liquid droplet. The liquid in the thermal chamber portion is heated in response to each input signal and heating is sufficient instantaneously to cause a change of state of the liquid in the thermal portion chamber sufficient to produce a force acting on liquid filling the passageway between the thermal chamber portion and the orifice that overcomes the surface tension of liquid at the orifice and thereby projects a droplet of liquid from the orifice. After projection of the droplet of liquid and with attenuation of the change of state and the force produced thereby, the liquid chamber portion is replenished with liquid. Apparatus for performing the liquid jet recording process is also disclosed.

A liquid jet recording method and apparatus for recording information on a recording medium. A laser beam is irradiated onto an opto-mechanical transducer provided at a position, in a liquid flow path having at its distal end a discharge orifice for ejecting liquid in a predetermined direction and a pressure acting zone, at which a pressure acts on the recording liquid filled in that portion of the flow path, where the pressure as generated is effectively transmitted to the recording liquid filled in the pressure acting zone. This enables the liquid to be ejected from the discharge orifice, by which laser beam irradiation mechanical displacement is caused to deform the wall of the pressure acting zone to thereby bring about abrupt pressure change in the liquid filled in the pressure acting zone to eject the liquid from the discharge orifice in the form of droplets which fly toward the surface of a recording medium, on which the droplets adhere to make a necessary recording.

Liquid jet recording method and apparatus

An image-forming member for forming a metal grain image of the type containing a reducible metal compound which is able to isolate metal from it when reduced, and a reducing agent being capable of reducing the metal compound so that there may be formed a metal grain image by the metal isolated from the metal compound at the portion of the member subjected to the action of energy for producing a metal grain image-forming ability and thermal energy is characterized by the provision of a capturing means which is capable of capturing by-product produced from the metal compound upon the isolation of the metal from the metal compound.

Image forming member

A heat-developable photosensitive material for producing an electrostatic printing master having improved electrostatic characteristics comprises a support, an organic silver salt, a reducing agent, and a binder.

Heat-developable photosensitive material

A heat-developable photosensitive member for forming an electric printing master comprises a support, an organic silver salt layer containing an organic silver salt, a halide and a toning agent dispersed in a binder, and a surface protecting layer or a particular surface, and a reducing agent is contained in at least one layer of the organic silver salt layer and a layer adjacent to the organic layer.

Heat-developable photosensitive member for forming electrostatic

An improved heat-developable photosensitive material is disclosed which comprises an infrared rays-absorbing layer provided in contact with or adjacent to a layer comprising a reducible organic silver salt.

A heat developable photosensitive composition comprises an organic silver salt, a halide and a sulfur compound.

Heat developable photosensitive composition and a heat developable

An image forming method comprises adding a development accelerator for accelerating the developing function at the time of the heat-development to a heat-development type photosensitive raw material containing therein at least an organic silver salt, a halide, and a binder, at the time when the image formation is to be carried out by the process steps of exposure and heat-development.

Image forming method

Toner images are fixed by selectively elevating the temperature of the toner image portions and supplying a fixing agent to the toner image portions at the elevated temperature by utilizing the temperature difference between the toner image portions and the non-image portions.

Growing community of inventors

Yokohama, Japan

Ichiro Endo