Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Other

Jeffrey D Rutland

Dean J Richtsmeier

Paul K Mui

Grant Allen Webster

Steven L Webb

Stephen William Bauer

Tod S Heiles

Brooke E Smith

David E DeBellis

Jeffrey H Barr

Jennifer M Korngiebel

Brian Eugene Curcio

Jeffrey Anderson

Cynthia Jarom

John Murphy

A scanner is disclosed. The scanner has a platen with at least one edge of the platen uncovered.

Scanner platen

A scanner is disclosed. The scanner has only one calibration strip.

Scanner

Fluid is purged from a plurality of fluid-ejection nozzles of a fluid-ejection mechanism. A first series of spit-wipe operations is performed. A second series of spit-wipe operations is then performed.

Purging fluid from fluid-ejection nozzles by performing spit-wipe operations

Described is a method which corrects for malfunctioning or inoperable ink ejection elements in a one-pass printmode. The method comprises obtaining the standard printmask; identifying the ink ejection elements which are malfunctioning; ascertaining ink ejection elements adjacent to the ejection elements which are malfunctioning; selecting particular adjacent ink ejection elements from the adjacent ink ejection elements; and modifying the standard printmask by adjusting the amount of ink deposited by the selected adjacent ink ejection elements to create a modified printmask.

Method to correct for malfunctioning ink ejection elements in a single pass print mode

The following described arrangements and procedures generate a smudge resistant image with an ink jet imaging device. Specifically, in an image printing zone on the ink jet imaging device, a first carriage generates an image on a print medium. Then, in an image protecting zone on the ink jet imaging device, a second carriage deposits an overcoat solution and a fixer solution onto the image to form a substantially smudge resistant image.

Smudge-resistant ink jet printing

A method of correcting for malfunctioning ink ejection elements in a printing system using a single pass over a recording medium which includes obtaining a standard printmask, identifying ink ejection elements which are malfunctioning, ascertaining an original color measurement value for each pixel which will be printed with the malfunctioning ink ejection elements, determining a replacement color measurement value closest in value to the original color measurement value which does not use the malfunctioning ink ejection elements for each pixel which will be printed with the malfunctioning ink ejection elements and modifying the standard printmask by adjusting the number and color of ink drops deposited based on the replacement color measurement value for each pixel which will be printed with the malfunctioning ink ejection elements to create a modified printmask.

Method to correct for color error caused by malfunctioning ink ejection elements

A collection spittoon with a vacuum connection draws air and ink ejected during service spitting through an opening in the top of the spittoon. The collected ink includes main ejected drops and aerosol generated during the service process. A method for servicing an inkjet printhead comprises positioning the printhead over an opening in a spittoon chamber, establishing an air flow into the chamber through the opening, actuating the printhead to spit ink droplets in a service mode, and collecting the ink droplets and associated aerosol by drawing the ink droplets and aerosol into the chamber with the air flow.

Vacuum spittoon for collecting ink during servicing of ink jet printheads

A thermal inkjet printer is provided. The printer has a sensor that detects the operating temperature of its printhead. If the temperature of the printhead is below the printhead's normal operating temperature when the printer is going to start to print an image or document, the operating temperature of the printhead is set at a temperature higher than its normal temperature. This is to ensure that the drop-volume of the printer stays at an optimum level when the printer is beginning to start to print the image or document after a period of non-use. Shortly after the printer has started the printing task, the operating temperature of the printhead is reduced to its normal operating temperature.

Increased startup pulse warming temperature to improve pen startup reliability

The present invention includes as one embodiment a method of controlling an inkjet printhead assembly, including providing the printhead assembly having ink ejection elements that eject ink from a firing chamber through a nozzle and being energizable by an electrical pulse having a first predetermined energy, monitoring the printhead assembly to determine elapsed time since each ink ejection element on the printhead assembly has been fired, calculating a predetermined maximum amount of time that an ink ejection element is not operating using ink formulation and geometry of the nozzle and the firing chamber, comparing the elapsed time for each ink ejection element on the printhead assembly with the predetermined maximum amount of time and initiating high energy spitting at a second predetermined energy for the printhead assembly if the predetermined maximum amount of time has been exceeded for at least one of the ink ejection elements on the printhead assembly.

Method for using highly energetic droplet firing events to improve droplet ejection reliability

A method for minimizing cross-contamination of print cartridges in an inkjet printing system due to aerosol drift by employing a bi-directional spitting scheme coupled with a configuration of the print cartridges. The method includes a carriage for traversing across a print medium and a spittoon, the carriage having a plurality of N receptacles, the receptacles identified from left to right as positions,through N, includes mounting a reactive print cartridge in either positions,and N, or both, on the carriage, the reactive print cartridges having a plurality of nozzles for ejecting reactive droplets and mounting a plurality of print cartridges in the remaining positions on the carriage, the print cartridges having a plurality of nozzles for ejecting ink droplets. During operation of the printing system, depending on the number of reactive print cartridges and the number of print cartridges and the location thereof, intermittently ejecting non-printing ink and reactive droplets from the print cartridges in a specific order while the carriage is moving in a transverse left to right direction and ejecting ink and reactive droplets from the print cartridges in a specific order while the carriage is moving in a transverse right to left direction.

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San Diego, CA, United States of America

Jeffrey D Rutland