Abstract: A printhead is provided having at least one row that comprises a plurality of sets of n adjacent printing nozzles. Each nozzle is configured to expel ink in response to a fire signal, such that, for each set of nozzles, a fire signal is provided in accordance with the sequence: [nozzle position 1, nozzle position n, nozzle position 2, nozzle position (n?1), . . . , nozzle position x].

Abstract: A method of manufacturing printhead modules which can be combined to form a pagewidth printhead is provided which includes laying out each of the printhead modules on a wafer substrate to be either right-handed or left-handed. At least one of the printhead modules is larger than a reticle step used in laying out that printhead module.

Abstract: A pagewidth inkjet printer is provided having a pagewidth printhead which has a plurality of printhead modules mounted end to end on a carrier to extend across a pagewidth with each printhead module incorporating a plurality of inkjet nozzles and the nozzles of at least one of the printhead modules being rotationally displaced relative to the carrier, and a printer controller for communicating ink dot data to the inkjet nozzles in accordance with a cumulative correction factor for each printhead module. The printer controller measures the amount of rotational displacement of the rotationally displaced printhead module to determine the cumulative correction factor to at least partially compensate for the rotational displacement.

Abstract: An inkjet printhead is provided having a plurality of printhead modules arranged across a pagewidth to be printed. Each printhead module has a plurality of rows of ink ejection nozzles. At least some of the rows include at least one displaced row portion. The displaced row portions of at least some of the rows are different in length than the displaced row portions of at least some of the other rows.

Abstract: A printhead is provided which has a plurality of types of printheads modules. Each type of module is determined by its geometric shape in plan so that the combination of the determined module types forms the printhead to extend and print across a pagewidth. At least one row of printhead nozzles defined across the determined types of modules includes at least one displaced row portion.

Abstract: A printhead is provided having elongate printhead modules arranged parallel to each other to extend across a pagewidth and controllers for processing print data into dot data and for controlling the printhead modules in accordance with the dot data. Each printhead module has plural ink ejection nozzles. At least one of the printhead modules is longer than the other printhead modules. The controllers control ink ejection of the nozzles of the printhead modules in accordance with the dot data. At least one of the controllers is arranged to control all of the printhead modules and at least one other of the controllers is arranged to control only one of the printhead modules. Each controller has serial outputs for supplying the dot data for channels of the associated printhead module or modules.

Abstract: A printhead is provided having elongate printhead modules arranged to aggregately extend across a pagewidth and controllers for processing print data into dot data and for controlling the printhead modules in accordance with the dot data. Each printhead module has plural rows of ink ejection nozzles. The nozzle rows of at least one of the printhead modules are longer than the nozzle rows of the other printhead modules. The controllers control ink ejection of the nozzles of the printhead modules in accordance with the dot data. At least one of the controllers is arranged to control all of the printhead modules and at least one other of the controllers is arranged to control only one of the printhead modules.

Abstract: A printer is provided having a printhead of first and second elongate printhead modules and first and second printer controllers configured to receive print data and process the print data to output dot data to the printhead. The printhead modules are parallel to each other, are disposed end to end on either side of a join region, and are of different lengths. The first printer controller is arranged to output dot data to both the first and second printhead modules and the second printer controller is arranged to output dot data only to the second printhead module. One or more of the printhead modules has at least one row of print nozzles and at least two shift registers for shifting in the dot data to at least one row. Each print nozzle obtains the dot data from an element of one of the shift registers.

Abstract: A printhead system comprising an inkjet printhead and a printer controller for supplying dot data to the printhead is provided. The printhead comprises a plurality of first nozzles and a plurality of second nozzles supplied with a same colored ink. The first nozzles and second nozzles are configured in a plurality of sets, wherein each set of nozzles comprises one first nozzle and one corresponding second nozzle. Each nozzle in a set is configurable by the printer controller to print a dot of the ink onto a substantially same position on a print medium. The printer controller is programmed to supply dot data such that the first nozzles and the second nozzles each contribute dots to a line of printing.

Abstract: A printhead system comprising an inkjet printhead and a printer controller for supplying dot data to the printhead is provided. The printhead comprises a plurality of transversely aligned color channels, each color channel comprising at least one nozzle row extending longitudinally along said printhead. Each nozzle in a color channel ejects the same colored ink. The printhead is comprised of a plurality of printhead modules with each printhead module comprising a respective segment of each nozzle row. The printer controller is programmed to supply dot data such that each of the printhead modules fires a respective segment within a predetermined segment-time. At least one of the fired segments is contained in a different color channel from at least one other of the fired segments.

Abstract: A printer controller for supplying dot data to an inkjet printhead is provided. The printhead comprises a plurality of first nozzles and a plurality of second nozzles supplied with a same colored ink. The first nozzles and second nozzles are configured in a plurality of sets, wherein each set of nozzles comprises one first nozzle and one corresponding second nozzle. Each nozzle in a set is configurable by the printer controller to print a dot of the ink onto a substantially same position on a print medium. The printer controller is programmed to supply dot data such that the first nozzles and the second nozzles each contribute dots to a line of printing.

Abstract: A printer controller for supplying dot data to an inkjet printhead is provided. The printhead comprises a plurality of transversely aligned color channels. Each color channel comprises at least one nozzle row extending longitudinally along the printhead with each nozzle in a color channel ejecting the same colored ink. The printhead is comprised of a plurality of printhead modules with each printhead module comprising a respective segment of each nozzle row. The printer controller is programmed to supply dot data such that each of the printhead modules fires a respective segment within a predetermined segment-time, wherein at least one of the fired segments is contained in a different color channel from at least one other of the fired segments.

Abstract: A method of forming a structurally integrated component. The method comprises providing a first ceramic material comprising an oxidation sensitive ceramic material and providing a second ceramic material comprising an uncured, oxide ceramic matrix composite. The first ceramic material may be a carbon-based ceramic material selected from the group consisting of carbon fibers, carbon whiskers, carbon powder, graphite, silicon carbide, silicon oxycarbide, and mixtures thereof. The second ceramic material may comprise an inorganic oxide fiber reinforcement impregnated with an alumina matrix or an aluminosilicate matrix. The second ceramic material and the first ceramic material are contacted to form an uncured, structurally integrated precursor component, which is co-cured. The co-cured, structurally integrated precursor component is then co-fired in an inert atmosphere to bond the first ceramic material and the second ceramic material.

Abstract: A printer comprising: a printhead comprising at least a first elongate printhead module, the at least one printhead module including at least one row of print nozzles for expelling ink; and at least first and second printer controllers configured to receive print data and process the print data to output dot data to the printhead, wherein the first and second printer controllers are connected to a common input of the printhead.

Abstract: A printhead comprising a plurality of printhead modules, the printhead being wider than a reticle step used in forming the modules, the printhead comprising at least two types of the modules, wherein each type is determined by its geometric shape in plan.

Abstract: An inkjet printhead is provided having elongate printhead modules arranged to successively abut one another at respective longitudinal ends with a vertical offset and controllers for controlling the printhead modules. Each module has a plurality of ink ejection nozzles. A first controller is configured to receive and process print data to generate first ink dot data and a second controller is configured to receive and process print data to generate second ink dot data and to generate third ink dot data including the second dot data and at least some of the first dot data. The first controller is arranged to output the first dot data to at least a first printhead module and the second controller. The second controller is arranged to output the third dot data to at least a second printhead module which abuts the first printhead module.

Abstract: A printer controller able to compensate for inoperative or dead nozzles in a printhead. The printhead includes a plurality of sets of nozzles for printing a corresponding plurality of channels of dot data. The printhead is operated or controlled by the printer controller able to determine one or more operative nozzles capable of printing a dot on print media near a position at which the inoperative nozzle would have printed a dot had it been operative. The printer controller may also compensate for an inoperative nozzle in the printhead by using color redundancy.

Abstract: A printer controller for providing data to a printhead module that includes: at least one row of print nozzles; at least first and second shift registers for shifting in dot data supplied from a data source, wherein each shift register feeds dot data to a group of nozzles, and wherein each of the groups of the nozzles is interleaved with at least one of the other groups of the nozzles.

Abstract: A printhead module having a plurality of rows of nozzles configured to extend, in use, across at least part of a printable pagewidth, the nozzles in each row being grouped into at least first and second fire groups, the printhead module being configured to sequentially fire, for each row, the nozzles of each fire group, such that each nozzle in the sequence from each fire group is fired simultaneously with respective corresponding nozzles in the sequence in the other fire groups, wherein the nozzles are fired row by row such that the nozzles of each row are all fired before the nozzles of each subsequent row.

Abstract: A method of at least partially compensating for errors in ink dot placement by at least one of a plurality of nozzles due to erroneous rotational displacement of a printhead module relative to a carrier, the nozzles being disposed on the printhead module, the method comprising the steps of: (a) determining the rotational displacement; (b) determining at least one correction factor that at least partially compensates for the ink dot displacement; and (c) using the correction factor to alter the output of the ink dots to at least partially compensate for the rotational displacement.