摘要:
A method of operating a scanning apparatus including a transparent platen, a memory, a lid to cover the transparent platen, and a door in the lid, the method includes exposing a portion of the transparent platen through the door in the lid; placing a user identifier into the door in the lid; providing a user identification initiation signal; emitting light from a light source to illuminate the exposed portion of the transparent platen; moving a photosensor array to scan the user identifier through the exposed portion of the transparent platen; providing a digitized image of the user identifier from the scan by the photosensor array; comparing the digitized image to a stored pattern; and authorizing a function of the scanning apparatus if it is determined that the digitized image of the user identifier adequately matches the stored pattern.
摘要:
A method of controlling a maintenance operation in an inkjet printer including an inkjet printhead supplied with fluid from a plurality of fluid sources, the method includes the steps of (a) monitoring the usage of the plurality of fluid sources; (b) identifying a first fluid source that is substantially empty; (c) identifying a second fluid source that is not substantially empty; and (d) performing the maintenance operation using a quantity of fluid from at least the second fluid source.
摘要:
A printhead module includes a substrate, a plurality of drop ejector arrays, and electronic circuitry. The substrate includes a butting edge extending in a first direction along the substrate. The plurality of drop ejector arrays extends substantially parallel to the butting edge of the substrate with a first drop ejector array of the plurality of drop ejector arrays being closest to the butting edge of the substrate. A portion of the electronic circuitry is disposed between the first drop ejector array and the butting edge of the substrate.
摘要:
A liquid ejector includes a structure defining a chamber. The chamber includes a first surface and a second surface. The first surface includes a nozzle orifice. A drop forming mechanism is located on the second surface of the chamber opposite the nozzle orifice. A first liquid feed channel and a second liquid feed channel are in fluid communication with the chamber. A first segment of a segmented liquid inlet is in fluid communication with the first liquid feed channel and a second segment of the segmented liquid inlet is in fluid communication with the second liquid feed channel.
摘要:
A fluid ejecting device and method of forming same are provided. The fluid ejecting device includes a substrate having a first surface and a second surface located opposite the first surface. A nozzle plate is formed over the first surface of the substrate. The nozzle plate has a nozzle through which fluid is ejected. A drop forming mechanism is situated at the periphery of the nozzle. A fluid chamber is in fluid communication with the nozzle and has a first wall and a second wall with the first wall and the second wall being positioned at an angle relative to each other. A fluid delivery channel is formed in the substrate and extends from the second surface of the substrate to the fluid chamber. The fluid delivery channel is in fluid communication with the fluid chamber. A source of fluid impedance includes a physical structure located between the nozzle and the fluid delivery channel.
摘要:
An internal filter includes a lower substrate and an upper substrate. Fluid passages are formed by etching grooves into the surfaces(s) of the upper and/or lower substrates and/or in one or more intermediate layers. The filter pores extending between the fluid passages are formed by etching second grooves that fluidly connect the fluid passages. Two or more sets of the one or two intermediate layers can be implemented to provide additional filter passages and/or pores. Each set can be connected to a separate fluid source and/or a separate microfluidic device. In another internal filter, the inlet and outlet passages and the filter pores are formed on the same upper or lower substrate. The inlet and outlet passages are partially formed in a first step. In a second step, the inlet and outlet passages are completed at the same time that the filter pores are formed.
摘要:
A nonbuttable full-width array printhead with reduced number of printbars required in a color printer is disclosed. The number of printbars may be reduced by including one single color printbar for each color and an additional printbar with multicolor die modules including each of the colors of the single color printbars. Die modules on each of the single color printbars are spaced closer together but are not butted. The total number of printbars may also be reduced by staggering printbars with multicolor die modules between printbars with the single color die modules. In the latter case, it is possible to preserve the order that inks of the various colors are applied for all regions of the printed paper.
摘要:
An ink jet printhead has an upper substrate containing a reservoir with ink inlet and a lower substrate having a linear array of droplet generating elements and addressing electrodes thereon. At least two layers of polymeric material are serially deposited and patterned over the droplet generating elements and addressing electrodes prior to mating the two substrates. The patterned polymeric layers define an elongated opening containing an array of posts therein and a plurality of channels, each channel containing a droplet generating element. One end of the channels is open to serve as nozzles and the other end is in communication with the elongated opening with the array of posts. After the two substrates are aligned and mated, the reservoir is in communication with the elongated opening, so that the ink from the reservoir is filtered prior to entering the channels by passing between and over the posts in the elongated opening.
摘要:
A printhead uses large and small drop ejectors to achieve efficient gray scale printing. The printhead is arranged with a close packed configuration of alternating large and small nozzles positioned to maximize coverage while minimizing the volume of ejected ink. The printhead may be operated in a single pass mode or dual pass mode. In the single pass mode, complete coverage is effected by rippling through the odd numbered jets first and then rippling through the even numbered jets. The position of the small spots from the even numbered jets can be adjusted to maximize coverage and counteract offset between nozzle centers. Printheads with different size nozzles can also be operated by a staggered firing method using dual passes to offset spots in the scan direction by shifting the printhead between passes or alternating between groups of large and small nozzles. Further improvements to image quality can be realized by shifting the spots in the direction perpendicular to the scanning direction by tilting the printhead or offsetting the nozzles with respect to the ink channels on the printhead.
摘要:
An improved temperature compensation method is disclosed in which a temperature sensing thermistor is formed on a substrate whose temperature is to be series of fractional thermistors which are selectively shorted out during a manufacturing process to provide a compensation for manufacturing variabilities of the temperature coefficient of resistance of the thermistor.