摘要:
An inkjet print cartridge (10) comprises a substrate (28) having a plurality of ink firing chambers (130) along a top surface of said substrate and a first outer edge (86) in close proximity to the ink firing chambers. The ink firing chambers are arranged in first and second arrays and with the firing chambers spaced so as to provide 600 dots per inch printing. An ink channel connects an ink reservoir with the chambers, and include a primary channel (52) connected to the reservoir and to a secondary channel. The primary channel (52) allows ink to flow from the reservoir, around the first outer edge to the secondary channel so as to be proximate to the ink firing chambers. A separate inlet passage (132) for each chamber connects the secondary channel with the chamber for allowing high frequency refill. A group of firing chambers in adjacent relationship forms a primitive (P1-P14) in which only one chamber is activated at a time. A circuit (78) on the substrate connects to the firing elements, while a second circuit (36) on the cartridge connects to the first circuit means, for transmitting firing signals to ink firing elements at a frequency greater than 9 kHz.
摘要:
An inkjet print cartridge (10) comprises an ink reservoir (12); a substrate (28) with a plurality of ink firing chambers (130) and an ink firing element (70) in each chamber along a top surface thereof a first outer edge (86) along a periphery of substrate; and in close proximity to the ink firing chambers. The ink firing chambers are arranged in first and second arrays and are spaced so as to provide 600 dots per inch printing. An ink channel connects the reservoir with the ink firing chambers and includes a primary channel (52) connected to the reservoir and to a secondary channel. The primary channel allows ink to flow from the ink reservoir, around the first outer edge of the substrate to the secondary channel along the top surface of the substrate. A separate inlet passage (132) defined by a barrier layer (134) for each firing chamber connects the secondary channel with the firing chamber. The separate inlet passage has peninsulas (149) and pinch points (146) formed in the barrier layer to prevent cross-talk and overshoot during high frequency operation. A first circuit (78) on the substrate connects to the firing elements while a second circuit (36) on the cartridge connects to the first circuit means, for transmitting firing signals to the ink firing elements at a frequency greater than 9 kHz.
摘要:
A single mask (30,56,64,70) is used to form a tapered nozzle (48) in a polymer nozzle member (46) using laser ablation. In one embodiment of the mask, clear portions of the mask, corresponding to the nozzle pattern to be formed, each incorporate a variable-density dot pattern (36), where the opaque dots (36) act to partially shield the underlying polymer nozzle member from the laser energy. This partial shielding of the nozzle member under the dot pattern results in the nozzle member being ablated to less of a depth than where there is no shielding. By selecting the proper density of opaque dots around the peripheral portions of the mask openings, the central portion of each nozzle formed in the polymer nozzle member will be completely ablated through, and the peripheral portions of the nozzle will be only partially ablated through. By increasing the density of dots toward the periphery of each mask opening, the resulting nozzle may be formed to have any tapered shape. Other mask patterns are also described.
摘要:
An ink fill slot 18 can be precisely manufactured in a substrate 12 utilizing photolithographic techniques with chemical etching, plasma etching, or a combination thereof. These methods may be used in conjunction with laser ablation, mechanical abrasion, or electromechanical machining to remove additional substrate material in desired areas. The ink fill slots may be appropriately configured to provide the requisite volume of ink at increasingly higher frequency of operation of the printhead.
摘要:
A nozzle member (16) for an inkjet print cartridge (14) and method of forming the nozzle member are disclosed. In the method, nozzles or orifices (17) are formed in a flexible polymer tape (18) by Excimer laser ablation. In one embodiment, a substrate (32) containing heating elements (34) is mounted on the back of the nozzle member. Conductors (28) for providing electrical signals to the substrate are located inside the flexible tape and end at a via overlying an associated electrode on the substrate.
摘要:
Ink jet print quality is improved and higher pen speed permitted by a bidirectional printing protocol. According to the new protocol, each individual character to be printed is first partitioned into a leading portion and a trailing portion. The trailing portion includes all trailing edge bits. Only the leading portion is printed on a forward pass of the ink jet pen. The trailing portion is printed on a reverse pass of the pen, so that trailing edge ink drops are instead printed as leading edge ink drops. As a result, satellite ink drops are directed toward the center of the character, where they are covered by primary ink drops, thereby minimizing character edge roughness associated with exposed satellite ink drops.
摘要:
The drop stability of a pen employed in an ink-jet printer and having a plurality of nozzles (12) in a nozzle plate (10) is increased by increasing the viscosity of the ink. For inks comprising water/glycols, the increase in viscosity is easily accomplished by increasing the ratio of glycol to water. In one ink, a 20 % increase in glycol concentration resulted in a 50 % increase in viscosity and a decrease in the variation of angular misdirection by 43 %.