Abstract:
PROBLEM TO BE SOLVED: To provide a device that supplies an ink to a print head fitting to pressure requirement of a printer head without having any problems with cost and size, and to provide a method. SOLUTION: A reservoir is provided for a printhead in an inkjet printing device, the printhead having at least one printhead inlet at a rear face thereof for flow of ink from the reservoir into the printhead. The print head has at least one inlet opening of the printhead on rear side so that the ink runs from the reservoir. The reservoir includes: a perimeter wall sealably mounted to the rear face of the printhead and defining a chamber in communication with the printhead inlet. The chamber is open at one face and the reservoir includes a resilient flexible membrane attached to the perimeter wall and covering the one face. An inlet is provided in communication with the chamber for passage of ink into the chamber. The resilient flexible membrane has an initial relaxed condition in a first state in which the reservoir is substantially full of ink, and a flexed condition in which the membrane is collapsed into the chamber. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent ink from draining to an ink source side by pressure without providing a check valve when the pressure increases or is applied to a filter from the inside of an ink reservoir. SOLUTION: A printhead reservoir 10 includes an ink reservoir 16 and an umbilical 17 used as a channel to deliver ink to the ink reservoir 16 from an ink source under pressure. A filter 14 is provided between the umbilical 17 and the ink reservoir 16, the filter having sufficiently high meniscus strength generated thereon. Since the filter 14 has high meniscus strength thereon, the meniscus prevent ink from draining from the reservoir 16 to the ink source side even when the pressure fluctuates downstream of the filter, that is, in the ink reservoir 16. It is not necessary to provide a check valve separately. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent ink suction into a jet part from being interrupted caused by a pressure decrease due to filter resistance, and to reduce cost for a filter.SOLUTION: A filter 14 prevents the clogging of a jet part or a nozzle 28 is arranged on a flow path or an ink injection path 22 from an ink injection port 12 through which ink supplied from an ink supply source passes to a chamber 16 for storing the ink by preventing particulates. The ink is stored in the chamber 16 between the filter 14 and the nozzle 28, so even if a pressure decrease before and after the filter 14 is generated, the nozzle 28 can normally suck ink. The filter 14 may be compact and inexpensive so that it can be mounted to the ink injection port 12. A vent path 26 is formed with a vent hole 18 in a top part of the chamber 16, so an internal pressure of the chamber 16 is automatically adjusted. It is preferable that a filter for preventing foreign matters is arranged in the vent hole 18.
Abstract:
PROBLEM TO BE SOLVED: To reduce energy consumption by activating a heater that is operatively connected to a printhead that ejects ink having a single color in response to receipt of a print job of a printer having multiple printheads compatible with solid phase change inks with different colors.SOLUTION: The printer detects the presence of colors other than the single color in image data received in the print job, and activates heaters operatively coupled to printheads that eject ink drops that correspond to the detected colors.
Abstract:
PROBLEM TO BE SOLVED: To prevent an ink leakage from a print head regardless of the attitude of a printer. SOLUTION: The ink-jet print head for selectively ejecting ink onto an image receiving surface includes a tank 104 including a supply of ink 124 and an air space 148 above the supply of ink 124 and defined by sidewalls 128, 130, an upper wall 136 and a lower wall 140; an ink injection port 108 formed in one wall; a vent opening 116 formed in one wall; and a vent member extending from the vent opening 116 and having an upper opening 152 arranged in the air space outside of the tank 104, a lower opening 156 arranged in the air space 148, and a vent passage 160 configured to fluidly couple the upper opening 152 to the lower opening 156, the lower opening 156 being arranged within the tank 104 so that the lower opening 156 can be always located within the air space 148 above the supply of ink 124 regardless of the attitude of the tank 104. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a reservoir assembly for decreasing a bubble in a printhead and used for an image formation device. SOLUTION: The reservoir assembly includes a back surface plate 208 having an ink inlet port constructed so as to receive liquid ink from an ink supply source, and a front surface plate 204 having an ink tank constructed so as to retain the received ink from the ink source and transfer the ink to the printhead. The bubble plate 200 is arranged between the front surface plate and the back surface plate. The bubble plate and the back surface plate enclose a filter chamber 206 between them. The filter chamber is constructed so as to receive the ink via the ink inlet port. The bubble plate includes a thin chamber having a slit 218 constructed so as to prevent a flow of the ink bubble from the filter chamber to the ink tank. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To maintain the state of aligning a print head with a transfer surface of a drum assembly, in a transfer inkjet printer. SOLUTION: The print head 18 faces the transfer surface 34 of the drum assembly 38. Contacts 74 and 76 are formed between the print head 18 and the drum assembly 38. The contacts include a contact member which is supported by the print head, and a receiving member which is supported by the drum assembly; and the contact member and the receiving member are brought into contact with each other. A driving member is moved along a print head transfer surface. In this case, the contact member and the receiving member, which constitute the contacts, are kept in the state of contact with each other while sliding, and the print head is kept in the state of being aligned with the drum transfer surface. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To constantly maintain an alignment state in a positional relationship between a transfer drum and a printhead in an offset printing system. SOLUTION: The printhead 18 is energized toward a transfer drum 26 through a head tilt spring 70 to make contact and is determined for position relative to the transfer drum by contact points 74 and 76 in between. Stub shafts 60 and 62 pivotally support the printhead and are slightly permitted for movement against the chassis. The force for driving the printhead in the direction of connecting the two stub shafts (X-axis) acts on the X-axis and contributes to the maintenance of the alignment state. COPYRIGHT: (C)2005,JPO&NCIPI