Patents by Inventor Peter Gillespie
Peter Gillespie has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20080297554Abstract: A printhead IC is provided which has an array of nozzles, drive circuitry for receiving print data and sending drive pulses of electrical energy to the array of nozzles in accordance with the print data, and a temperature sensor connected to the drive circuitry to adjust the drive pulse profile in response to the temperature sensor output. During use, the temperature sensor can be de-activated after a period of use. The drive circuitry sets the duration of the pulse profile to a sub ejection value for any of the nozzles in the row that are not to eject a drop during that firing sequence.Type: ApplicationFiled: July 22, 2008Publication date: December 4, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Publication number: 20080291233Abstract: Provided is test circuitry for testing a thermal actuator of a printhead nozzle arrangement of a printhead. The circuitry includes an open actuator test input, a column enable input and a row enable input. A drive transistor operatively links said thermal actuator to a power supply, and a bleed transistor is arranged in parallel with the thermal actuator. The circuitry also includes a sense transistor operatively linking an output of the drive transistor and inputs of the thermal actuator and bleed transistor to a sensing node, as well as a controller configured to deactivate the bleed and sense transistors and to activate the drive transistor when the column enable and row enable inputs are activated to link the thermal actuator to the power supply, and to activate the bleed and sense transistors when the open actuator test input is activated, so that the thermal actuator is short-circuited and the sense node is pulled high if the thermal actuator is open-circuit.Type: ApplicationFiled: July 11, 2008Publication date: November 27, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Publication number: 20080278532Abstract: A printhead IC is provided having an array of nozzles, drive circuitry for receiving print data and sending drive pulses of electrical energy to the array of nozzles in accordance with the print data, and a temperature sensor connected to the drive circuitry to adjust the drive pulse profile in response to the temperature sensor output. During use, the temperature sensor can be de-activated after a period of use. The drive circuitry is programmed with a series of temperature thresholds defining a set of temperature zones, each of the zones having a different pulse profile for the drive pulses sent to the nozzles in the region currently operating in that temperature zone.Type: ApplicationFiled: July 22, 2008Publication date: November 13, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Publication number: 20080278545Abstract: Provided is a method of operating a thermal bend actuator of a printhead nozzle arrangement of a printhead using an open actuator test circuit. The test circuit includes an open actuator test input, a column enable input and a row enable input; a drive transistor operatively linking said thermal actuator to a power supply; a bleed transistor arranged in parallel with the thermal actuator; a sense transistor operatively linking an output of the drive transistor and inputs of the thermal actuator and bleed transistor to a sensing node. The method includes the step of actuating the actuator to facilitate printing by enabling the column and row enable inputs to deactivate the bleed and sense transistors and to activate the drive transistor to link the thermal actuator to the power supply.Type: ApplicationFiled: July 29, 2008Publication date: November 13, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Marcelle Louisa Gannon, Kia Silverbrook
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Publication number: 20080278529Abstract: Provided is a print engine controller for an inkjet printhead with a plurality of nozzle arrangements operatively actuated by thermal actuators. The controller has controller circuitry with an open actuator test circuit to test each respective actuator. The controller circuitry includes an open actuator test input, a column enable input and a row enable input, as well as a drive transistor operatively linking said thermal actuator to a power supply. The circuitry also includes a bleed transistor arranged in parallel with the thermal actuator, and a sense transistor operatively linking an output of the drive transistor and inputs of the thermal actuator and bleed transistor to a sensing node. The controller circuitry is configured so that when only the column enable and row enable inputs are activated the bleed and sense transistors are deactivated and the drive transistor is activated to link the thermal actuator to the power supply.Type: ApplicationFiled: July 29, 2008Publication date: November 13, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Marcelle Louisa Gannon, Kia Silverbrook
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Patent number: 7425047Abstract: A printhead IC for an inkjet printer, the inkjet printer having a PEC for sending print data to the printhead IC in accordance with a predetermined data transmission protocol, the printhead IC comprising: an array of nozzles for ejecting drops of printing fluid onto a media substrate; and, drive circuitry for driving the array of nozzles; wherein, the circuitry is configured to receive print data in any one of a plurality of different data transmission protocols.Type: GrantFiled: October 10, 2006Date of Patent: September 16, 2008Assignee: Silverbrook Research Pty LtdInventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Marcelle Louisa Gannon, Richard Thomas Plunkett, Kia Silverbrook
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Patent number: 7425048Abstract: A printhead IC comprising: an array of nozzles; drive circuitry for receiving print data and sending drive pulses of electrical energy to the array of nozzles in accordance with the print data; and, a temperature sensor connected to the drive circuitry to adjust the drive pulse profile in response to the temperature sensor output; wherein during use, the temperature sensor can be de-activated after a period of use.Type: GrantFiled: October 10, 2006Date of Patent: September 16, 2008Assignee: Silverbrook Research Pty LtdInventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Patent number: 7413288Abstract: An inkjet printer comprising: a printhead with a plurality of printhead IC's, each having an array of nozzles for ejecting drops of printing fluid, and drive circuitry for driving the array of nozzles; a print engine controller for sending print data to the printhead IC's; an interface for electrical communication between the print engine controller and the printhead IC's; wherein, all the printhead IC's have a common initial address except one printhead IC at the end of the printhead, the exception having a different address such that the print engine controller sends a first broadcast instruction to any printhead IC's having the different address, the first broadcast instruction instructing the printhead IC having the different address to change its address to a first unique address, the printhead IC's being interconnected such that when the exception has undated its address, the address of the adjacent printhead IC changes to the different address so that a second broadcast command changes the write addresType: GrantFiled: October 10, 2006Date of Patent: August 19, 2008Assignee: Silverbrook Research Pty LtdInventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Publication number: 20080157492Abstract: A transformable creeper has a movable frame that facilitates movement between an extended position and a seat position, as well as a storage position, and can support the human operator when lying and seated on the creeper. The creeper is of two pieces, that fold over each other tightly, so as to occupy minimal storage space. The creeper also includes a member that is pivotally mounted to the frame to function as a seat, that is easily accessible, when the frame is in the seat position and seating is desired.Type: ApplicationFiled: December 29, 2006Publication date: July 3, 2008Inventors: Arthur Chaykin, Peter Gillespie
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Patent number: 7384128Abstract: A printhead IC for an inkjet printer that mounts the printhead IC together with at least one other like printhead IC to provide a pagewidth printhead for printing onto a media substrate fed past the printhead in a feed direction, the printhead IC comprising: an elongate array of nozzles, the nozzles arranged into rows, at least one of the rows having a first section positioned on a line extending perpendicular to the feed direction, a second section positioned along a parallel line displaced from the first section, and an intermediate section of nozzles extending between the first section and the second section; and a supply conduit for providing printing fluid to the first section, the second section and the intermediate section, the supply conduit having a first portion extending perpendicular to the feed direction for supplying the first section of nozzles, a second portion extending perpendicular to the feed direction for supplying the second section of nozzles and an inclined portion for supplying the inType: GrantFiled: October 10, 2006Date of Patent: June 10, 2008Assignee: Silverbrook Research Pty LtdInventors: John Robert Sheahan, Mark Jackson Pulver, Roger Mervyn Lloyd Foote, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Publication number: 20080094446Abstract: A printhead IC for an inkjet printer that mounts the printhead IC together with at least one other like printhead IC to provide a pagewidth printhead for printing onto a media substrate fed past the printhead in a feed direction, the printhead IC comprising: an elongate array of nozzles, the nozzles arranged into rows, at least one of the rows having a first section positioned on a line extending perpendicular to the feed direction, a second section positioned along a parallel line displaced from the first section, and an intermediate section of nozzles extending between the first section and the second section; and a supply conduit for providing printing fluid to the first section, the second section and the intermediate section, the supply conduit having a first portion extending perpendicular to the feed direction for supplying the first section of nozzles, a second portion extending perpendicular to the feed direction for supplying the second section of nozzles and an inclined portion for supplying the inType: ApplicationFiled: October 10, 2006Publication date: April 24, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Roger Mervyn Lloyd Foote, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Publication number: 20080094451Abstract: A printhead IC for an inkjet printer, the inkjet printer having a PEC for sending print data to the printhead IC in accordance with a predetermined data transmission protocol, the printhead IC comprising: an array of nozzles for ejecting drops of printing fluid onto a media substrate; and, drive circuitry for driving the array of nozzles; wherein, the circuitry is configured to receive print data in any one of a plurality of different data transmission protocols.Type: ApplicationFiled: October 10, 2006Publication date: April 24, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Marcelle Louisa Gannon, Richard Thomas Plunkett, Kia Silverbrook
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Publication number: 20080094437Abstract: A printhead IC comprising: an array of nozzles; drive circuitry for receiving print data and sending drive pulses of electrical energy to the array of nozzles in accordance with the print data; and, a temperature sensor connected to the drive circuitry to adjust the drive pulse profile in response to the temperature sensor output; wherein during use, the temperature sensor can be de-activated after a period of use.Type: ApplicationFiled: October 10, 2006Publication date: April 24, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Publication number: 20080084439Abstract: An inkjet printer comprising: an array of nozzles arranged into rows, each row consisting of a plurality of nozzle groups, the nozzles in each group being interspersed with nozzles from the other groups; and, associated drive circuitry for actuating the nozzles in the row in accordance with a firing sequence, the firing sequence enabling the nozzles in each group to eject printing fluid simultaneously, and enabling each of the groups to eject printing fluid in succession; wherein, the nozzles in each group are spaced from each other by at least a predetermined minimum number of nozzles and, each of the nozzles in a group is spaced from the nozzles in the subsequently enabled group by at least the predetermined minimum number of nozzles.Type: ApplicationFiled: October 10, 2006Publication date: April 10, 2008Inventors: Jonh Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Brian Robert Brown, Kia Silverbrook
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Publication number: 20080084437Abstract: An inkjet printer comprising: a printhead with a plurality of printhead IC's, each having an array of nozzles for ejecting drops of printing fluid, and drive circuitry for driving the array of nozzles;a print engine controller for sending print data to the printhead IC's; an interface for electrical communication between the print engine controller and the printhead IC's; wherein, all the printhead IC's have a common initial address except one printhead IC at the end of the printhead, the exception having a different address such that the print engine controller sends a first broadcast instruction to any printhead IC's having the different address, the first broadcast instruction instructing the printhead IC having the different address to change its address to a first unique address, the printhead IC's being interconnected such that when the exception has undated its address, the address of the adjacent printhead IC changes to the different address so that a second broadcast command changes the write addressType: ApplicationFiled: October 10, 2006Publication date: April 10, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Publication number: 20080084436Abstract: A printhead IC comprising: an array of nozzles; and, drive circuitry for receiving print data and sending drive pulses to the nozzles in accordance with the print data; wherein, the drive pulses consist of ejection pulses with sufficient energy to eject printing fluid from the nozzles designated to fire at that time, and sub-ejection pulses with insufficient energy to eject printing fluid from the nozzles not designated to fire at that time.Type: ApplicationFiled: October 10, 2006Publication date: April 10, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Angus John North, Kia Silverbrook
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Publication number: 20080084434Abstract: A printhead IC comprising: an array of nozzles; and, drive circuitry for sending an drive pulse to each of the nozzles individually such that they eject a drop of printing fluid; wherein, the drive circuitry adjusts the drive pulses sent to the nozzles in accordance with the temperature of the printing fluid within the nozzles.Type: ApplicationFiled: October 10, 2006Publication date: April 10, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Publication number: 20080084446Abstract: A printhead IC for an inkjet printer, the inkjet printer having a print engine controller (PEC) for sending print data to the printhead IC, the printhead IC comprising:an array of nozzles for ejecting drops of printing fluid onto a media substrate; and,drive circuitry for driving the array of nozzles, the drive circuitry being configured for connection to a power source in the printer; wherein,the drive circuitry being configured to reset itself to a known initial state in response to receiving power from the power source after a period of not receiving power from the power source.Type: ApplicationFiled: October 10, 2006Publication date: April 10, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook
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Publication number: 20080084438Abstract: A printhead IC comprising: an array of nozzles; drive circuitry for receiving print data and fire commands from a print engine controller; wherein during use, the drive circuitry receives the print data for the array in a plurality of sequential portions with a fire command at the end of each portion.Type: ApplicationFiled: October 10, 2006Publication date: April 10, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Marcelle Louisa Gannon, Kia Silverbrook
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Publication number: 20080084453Abstract: A printhead IC comprising: an array of nozzles; an ejection actuator corresponding to each of the nozzles respectively, the ejection actuator having a resistive heater that is activated when the actuator ejects ink through the corresponding nozzle;drive circuitry for receiving print data and activating the actuators with drive signals in accordance with the print data; and,open actuator test circuitry for selectively disabling the actuators when they receive a drive signal while comparing the resistance of the resistive heater to a predetermined threshold to assess whether the actuator is defective.Type: ApplicationFiled: October 10, 2006Publication date: April 10, 2008Inventors: John Robert Sheahan, Mark Jackson Pulver, Brian Christopher Morahan, Alireza Moini, Timothy Peter Gillespie, Michael John Webb, Kia Silverbrook