Wisertek International Corporation

Ji-Chen Wu

Chen-Hua Lin

Hsien-shu Tsai

Ming-Hsun Yang

Arnold Chang-Mou Yang

Wen-kang Sung

Shih-hung Lee

Dong-Sang Chiang

Ching-Yu Chou

Hung-Chou Kang

Fung-Ing Hsu

Huan-Kun Chen

Ming-hsun Yang

A method according to the invention comprises the following steps. At first, a first layer of film is coated over a micro-control apparatus having a plurality of ejecting elements. Next, a plurality of ink chambers, a plurality of ink channels, and a plurality of supporting cylinders are simultaneously formed in the first layer of film by photolithography. More specifically, the plurality of supporting cylinders is located within the plurality of ink channels. Thereafter, a layer of liquid medium is coated over the first layer of film. A photosensitive film is provided over the first layer of film, and then a plurality of ink orifices is formed therein at positions respectively corresponding to the plurality of ink chambers by photolithography. Finally, the micro-control apparatus is connected to a signal input means. Accordingly, a precision alignment of application between ink orifices and ink chambers in manufacturing a conventional printhead is not necessary so that the throughput and yield rate can be increased.

Method for manufacturing a printhead of ink jet printing apparatus

A heat bonding apparatus for manufacturing an ink-jet printhead, whereby a flexible circuit tape is heat-bonded on the an IC chip of an ink-jet printhead so that a signal from the printing apparatus can be transmitted to the IC chip of the ink-jet printhead to control the ink-jet printing operation. The heat bonding apparatus comprises a head seat; a heat bonding head seated in the head seat, the heat bonding head being movable along with the head seat to carry out a heat bonding process; and a heat bonding sheet of arc shape and in the form of an elastic metal sheet. The heat bonding sheet is deformable under pressure and one end of the heat bonding sheet is secured to the heat bonding head so that when the heat bonding sheet is pressed for heat bonding the flexible circuit tape and the IC chip, the heat bonding sheet undergoes deformation and in the mean time pushes the air away from between the flexible circuit tape and the IC chip to let them fully contact each other.

Heat bonding apparatus for manufacturing an ink-jet printhead

A method in accordance with present invention comprises the steps of: forming a micro-control apparatus having a plurality of ejecting elements; forming a first layer of film on said micro-control apparatus and forming a plurality of ink chambers in the first layer of film; forming a second layer of photosensitive film on said first layer of film and forming an ink orifice in said second layer of photosensitive film relative to each of said plurality of ink chambers in the first layer of film by photolithography. The method for manufacturing the printhead in accordance with the present invention is relatively simple. Using this method, the application of a nozzle plate to a dry film photoresist and the precision alignment between ink orifices and ink chambers in manufacturing a conventional printhead can be avoided so that the throughput and yield rate can be increased.

Printhead of ink jet printing apparatus and manufacturing method therefor

Ink-jet printhead and manufacturing process

Method and apparatus of identifying ink stored in an ink-jet cartridge are to change the electrical property such as resistance or capacitance of the ink and to cooperate with a detector to achieve the goal of identifying ink. The method comprises: adding special additive such as salt additive or acid additive into the ink or changing the ratio of the components in the ink, and further providing a detector for detecting the electrical property of the ink and doing logical judgment to identify whether the ink stored in the ink-jet cartridge is the original factory ink or not. The preferred embodiment of the apparatus of identifying ink in ink-jet cartridge is to form the detector on the IC of the print head directly to achieve the goal stating above of detecting the electrical property of the ink stored in the ink-jet cartridge.

Method and apparatus of identifying ink stored in an ink-jet cartridge

This specification discloses an electrode type print head for the printing apparatus and the method for manufacturing the same. The print head is placed in the inkjet cartridge of an inkjet-printing device. The print head comprises a substrate and a flexible nozzle plate with an ink reservoir formed in between. The flexible nozzle plate is attached onto the substrate, and the electrode set of the flexible nozzle plate corresponds to that of the substrate. When currents of different polarities are provided thereon, an absorptive force is generated to pull the flexible nozzle plate closer to the substrate. A pushing force jets the ink out of the print head and onto a printing media to achieve the goal of inkjet printing.

Electrode type print head for printing apparatus and method of manufacturing the same

An ink-jet cartridge with a negative pressure ink reservoir includes a rigid body provided with an ejecting device; an ink reservoir provided within the rigid body, the ink reservoir including two relatively movable plates and a plate body having resilience. The plate body is provided between the two flat plates, and is sealed with the circumferences of the two flat plates to form an enclosed ink reservoir. During ink-jet printing, the pressure within the ink reservoir decreases and the two plates move closer to each other to compress the plate body and the resilience of the plate body causes a negative pressure within the ink reservoir that prevents ink leakage from the ink-jet cartridge.

Ink-jet cartridge with a negative pressure ink reservoir

An ink-jet cartridge for an ink-jet pen is disclosed. The cartridge includes a back pressure chamber in which the level of ink will be self-adjusted to provide ink for ejection and prevent ink from leakage. The ink-jet cartridge includes an ink reservoir for storing ink, a back pressure chamber, a print ink chamber and a print head. The back pressure chamber has one end fluid-communicated with the ink in the ink reservoir, and the other end fluid-communicated with the print ink chamber via an overflow vent which is at a position higher than the ink level of the ink reservoir. A suitable back pressure is applied to the back pressure chamber and the print ink chamber so that, when printing, the increased back pressure in the print ink chamber sucks ink from the ink reservoir through the overflow vent into the print ink chamber; while, when not printing, the extra height of the ink in the back pressure chamber relative to the ink level of the reservoir balances the back pressure at the back pressure chamber and the print ink chamber to prevent ink leakage from the print head. Therefore, it doesn't need a valve or a movable element to accomplish the ink supply and leakage prevention.

Ink-jet cartridge

An ink cartridge for an ink jet printing device includes a rigid body having an ink chamber for containing ink within the body and an ink output port at one end of the body such that the ink within the ink chamber is output from the output port. A porous transmit medium is placed within the ink chamber and has one end adjacently connected to the ink output port such that the ink within the ink cavity is transmitted to the ink output cavity from the transmit medium by capillary action. The porous transmission medium is in an n-shaped form, including an input end, an output end, and an impermeable sheath between the input end and the output end. Thus, in the process of ink jet printing, at the instant when the ink within the ink output port is ejected, the porous transmit medium transmits the ink to the ink output chamber. As a result, no leakage of ink and smooth ink delivery are achieved. In addition, the structure of the cartridge is simple and assembly is early. The cartridge does not occupy space of the ink chamber.

Ink-jet cartridge for an ink-jet printing apparatus

The ink-jet cartridge of the present invention includes two magnetic plates attached to the two sides of a flexible ink reservoir and facing each other with their sides of the same magnetic polarity. Alternatively, the two magnetic plates are attached to two flexible bags within the rigid ink reservoir and face each other with their sides of the same magnetic polarity. Due to the repulsive force generated by the two magnetic plates, a pressure regulating effect can be achieved within the ink reservoir to prevent ink leakage and provide smooth ink delivery while printing.

Ink jet cartridge for an ink jet printing apparatus

The present invention provides any ink jet pen an apparatus for storing and printing ink, wherein a valve is connected between the ink reservoir and the ink chamber for controlling the ink flow between the ink reservoir and the ink chamber and adjusting the air pressure in the ink chamber to keep the pressure in the ink chamber within the allowed range as the ink gradually gets depleted or the environmental pressure changes. The valve having a plunger and a plunger chamber, wherein the plunger chamber is connected to the atmosphere via an atmospheric opening and connected to the ink chamber via a feedback opening which adjusts the pressure in the ink chamber to move the plunger. When a difference between the atmospheric pressure and inner pressure of the ink chamber develops, the plunger will be pushed by the pressure of the atmosphere or the ink chamber to determine whether the ink reservoir is connected to the ink chamber and to adjust the ink chamber inner pressure. Therefore, the cartridge can provide a proper ink supply and thorough ink usage and leakage prevention.

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Hsinchu, Taiwan

Ji-Chen Wu