Abstract:
A low ink sensing system is combined with an ink cartridge detection system to enable a more efficient ink jet printer. An ink container which supplies ink to an associated printhead is modified by the incorporation of two light directing elements, in the preferred embodiment, a faceted prism and a roof mirror, into a transparent wall of the container housing. The cartridge, comprising the ink container and associated printhead, is mounted on a scan carriage. Periodically, the carriage is conveyed to a sensing station comprising a pair of light sources and a commonly used photosensor. A first light source is energized and a beam of light is directed to a location where the roof mirror, would be positioned if the cartridge is present. If the cartridge is absent, lack of a reflected return signal is sensed, indicating a cartridge has not been inserted. Print operation is halted until a cartridge is inserted. If a cartridge is properly inserted, the roof mirror returns most of the incident light to the photosensor which generates a signal indicating the presence of the cartridge. A second light source is then energized and directed towards the faceted prism, which is either immersed in ink or exposed to air within the interior of the container. If the latter, light is internally reflected by the prism facets back to the photosensor. If a print operation has been in progress, and the ink level has fallen, the common photosensor detects either a strong or weak redirected light component and initiates a status check and generates appropriate displays of low ink level or out of ink warnings.
Abstract:
An ink jet printing method comprising the steps of: A) providing an ink jet printer that is responsive to digital data signals; B) loading the printer with ink jet recording elements; C) loading the printer with an ink jet ink composition; and D) printing on the ink jet recording element using the ink jet ink in response to the digital data signals; wherein the ink jet ink composition comprises from about 0.5% to about 30% by weight of a pigment, a carrier, a humectant and a dispersant in a ratio of dispersant:pigment from about 0.1:1 to about 5:1; the dispersant being a graft copolymer having the following formula: wherein R is H, halogen, an alkyl group of from about 1 to about 15 carbon atoms or an aryl group of from about 6 to about 18 carbon atoms; R1 is H, an alkyl group of from about 1 to about 15 carbon atoms, an aryl group of from about 6 to about 18 carbon atoms, arylalkyl, or a polydimethylsiloxane; X1 is H, Na or K; X2 is NH or O; R2 and R2′ are H or CH3; R3 is H, CH3, C2H5 or C3H7; x is from about 30 to about 90 weight ratio; y is from 0 to about 30 weight ratio; and z and z′ are from about 3 to about 50.
Abstract translation:一种喷墨打印方法,包括以下步骤:A)提供响应于数字数据信号的喷墨打印机; B)用喷墨记录元件装载打印机; C)用喷墨油墨组合物装载打印机; 和D)响应于数字数据信号使用喷墨油墨在喷墨记录元件上印刷;其中喷墨油墨组合物包含约0.5重量%至约30重量%的颜料,载体,保湿剂和 分散剂:分散剂:颜料的比例为约0.1:1至约5:1; 所述分散剂是具有下式的接枝共聚物:其中R是H,卤素,约1至约15个碳原子的烷基或约6至约18个碳原子的芳基; R 1是H,烷基 约1至约15个碳原子的芳基,约6至约18个碳原子的芳基,芳烷基或聚二甲基硅氧烷; X 1为H,Na或K; X 2为NH或O; R 2和R 2'为H或 CH3; R3为H,CH3,C2H5或C3H7; x为约30至约90重量比; y为0至约30重量比; 和z'为约3至约50。
Abstract:
An ink smearing preventing method of terminal equipment of inkjet output device resolves the drawback of the ink smearing which is caused due to ejection prior to ink drying during data printing onto paper, for which the ink smearing preventing method is provided to a printing manner where the next line is systematically printed regardless of the amount of ink sprayed, to adjust the printing speed such that the paper is ejected after the sprayed ink dries, by regulating the printing time of the next line according to the amount of ink, after determining the amount of ink sprayed. Meanwhile, the ink smearing preventing method includes the steps of determining whether there is data to be printed in the terminal equipment; calculating the dot number of the ink required for printing the data in a predetermined unit if there is data to be printed; printing the data in the predetermined unit on paper by initiating actuation of a timer corresponding to the calculated dot number; determining, after printing, whether the actuation of the timer is completed, and moving the paper as much as the predetermined unit if actuation of the timer is completed. Here, the timer corresponding to the calculated dot number is databased and preset in the memory of the terminal equipment, to a numerical value that is proportional to the data dot number for printing black ink. Accordingly, by determining the amount of ink used, when printing data in an inkjet type terminal equipment, and by adjusting the print time of the next line according to the determined amount, it is possible to regulate the printing speed such that the paper is ejected after the sprayed ink has dried. Therefore, there is the advantage of preventing data loss that may occur from the user's carelessness.
Abstract:
A method of pretreating an ink-jet printer (10) before it is used is provided, wherein the printer includes a printing head (16) provided with a plurality of nozzles (28) for ejecting ink-droplets and movable in a reciprocating manner, an ink storage section (40) and an ink supply conduit (42) connecting the printing head with the ink storage section. The entirety of an ink flow passage including the ink supply conduit (42) is filled with a colored liquid material (78) having a function for maintaining the hydrophilic nature of the ink flow passage, before the ink-jet printer is forwarded from a factory. Then, before the ink-jet printer is assigned to the user, a printing operation is carried out by the printing head (16) by using the colored liquid material (78) and a character printed with the colored liquid material is observed to determine a printing function.
Abstract:
A computer-controlled system for producing a multi-color image on a substrate using multi-colored cholesteric liquid crystal (CLC) pigment materials made from CLC flakes tuned to predetermined bands of color. An image generator automatically generates an image specifying a pattern over which binder material is to be applied to a substrate by a binder material applicator. A plurality of CLC pigment applicators automatically apply patterns of different-color CLC pigment material to the pattern of binder material, which binds thereto as the binder material dries according to its drying characteristics. An output device is used to automatically return the substrate to a different one of CLC pigment applicators after each application of a pattern of different-color CLC pigment material to the pattern of binder material. The output device automatically repeats the return of the substrate to the CLC pigment applicators until all bands of color in the multi-color image are rendered.
Abstract:
According to the position information, based on the encoder signal, about the print heads during movement which is obtained in connection with the print start timing of the signal used by the print heads to print the registration adjust patterns, the amount of registration deviation between the print heads are determined. Then, the differences between the print start time of the signal and the leading and trailing edge of the encoder signal are determined for each print head. The difference between these differences is adjusted as the deviation amount between the heads to adjust the ejection timing of each head. This can correct the print position deviations between the plurality of the heads with high precision without being influenced by variations in the head movement speed.
Abstract:
The printhead unit is for an imaging apparatus having a guide member. The printhead unit is configured to be positioned in a carrier assembly within the imaging apparatus and is configured for movement within the imaging apparatus via the carrier assembly. The printhead unit includes a housing a printhead and at least one bearing. The housing has at least a first side member. The printhead is attached at least to the first side member of the housing. Further, the at least one bearing has at least one bearing surface, the at least one bearing being coupled to the first side member of the housing and positioned to engage the guide member.
Abstract:
An inkjet printhead chip structure and a method of estimating the working life through the detection of any defect on the chip structure. The method includes laying a metallic layer such as a tantalum layer over the chip and then shaping the metallic layer into a protective layer circuit. A portion of the metal protective layer covers the heating elements embedded in the chip. In printing, the heating elements heat up the ink to produce jets of ink. However, a portion of the heat is transferred to the metal protective layer thereby raising its temperature. Heat on the metal protective layer combined with any strayed residual ink bubbles that impinge upon the surface of the metal protective layer causes the metal to age. Since resistance of the metal protective layer will increase proportionally to the amount of aging, a measurement of the resistance is capable of estimating how much longer a given chip is suitable for use. Furthermore, if this special circuit layout runs across each long side of an ink slot, any cracks along the direction of the ink slot are detectable during resistance measurement.
Abstract:
A printer having a media path through which a media sheet having a first surface and a second surface is transported. The printer includes a printhead, and a media frame having a base and an extension portion angularly extending upwardly away from the base. The base has a first edge spaced apart from a second edge. The first and second edges are located for contacting the media sheet on the first surface. The extension portion has a support surface for providing support for the media sheet at the first surface. The printer further includes a roller assembly having a roller positioned opposed to the extension portion, the roller engaging the second surface of the media sheet to define a line of contact with the media sheet. The line of contact defined by the roller and the first edge of the base determine a first curvature of the media sheet having a first radius, and the first edge and the second edge determine a second curvature of the media sheet having a second radius.
Abstract:
The individual monochromatic printheads mounted simultaneously on the scanning carriage of an ink jet printer are provided with an opto-electronic position detector of the four-quadrant type, which is integrated directly in the chip of each head by means of the same MOS technology used for the circuits for selection and driving of the emission resistors; an illumination device fixed onto the printer focuses a light spot on the position detector which thus provides the electronic control unit of the printer with a measurement of both the vertical and horizontal misalignment of each head, a measurement which is subsequently used in order to compensate automatically for the misalignment thereof.