Hewlett-packard Development Company, L.p.

Jordi Sender

Alex Andrea

Marti Rius

Ramon Vega

Angel Martinez

Sergio Puigardeu

David Gaston

Silvia Miramanda

Marcos Casaldaliga

Joan Jorba

Alejandro Campillo

Angel Martinez Barambio

M Isabel Borrell

Eduardo Amela

Marc Bautista

Pascal Ruiz

Roman Barba

Jean Frederic Plante

Joan Campderros

Juan Saez

Joan Joroa

Angel Alvarez

Toni Gracia

Pasqual Batalla

Examples describe a method in which first and second test patterns are printed onto a print medium. The first and second test patterns each vary in print density in opposing directions. A location is determined along the first and second test patterns having at least substantially equal visual density.

Print inconsistency quantification

The invention relates to a calibration method for a printer having a mechanism for advancing a medium in a direction of media advance comprising the following steps: (a) providing a printhead, the printhead having a swath height in the direction of media advance; (b) providing an estimate of either the swath height or the characteristic of the mechanism; (c) printing a base pattern on a medium using the printhead; (d) printing an overlay pattern on the medium using the printhead to form an interference pattern; (e) advance the medium of a predetermined distance using the mechanism at a time between the printing of the base pattern and the printing of the overlay pattern; (f) analyze an optical evaluation of the interference pattern; (g) evaluate as either: (i) the swath height if the characteristic of the mechanism is known or estimated; or (ii) the characteristic of the mechanism if the swath height is known or estimated.

Calibration method for a printer

A method of printing an image on a substrate using a page-wide-array printer and a page wide array printer is provided. The method includes printing a first portion of the image as relative movement occurs between the substrate and the print heads, and printing a second portion of the image as relative movement occurs between the substrate and the print heads, such that there exists an area of overlap between the first portion of the image and the second portion of the image. The substrate may be moved in a first direction relative to the print heads whilst the first portion of the image is printed, moved in a second direction opposite to the first direction; and moved in the first direction again whilst the second portion of the image is printed. The substrate may be printed whilst the substrate is moved in the second direction.

Method and printer for multi-pass page-wide array printing

Printing is performed at a full resolution using a first set of nozzles and a second set of nozzles arranged on a printhead. Printing is performed at less than the full resolution using the first set of nozzles less any nozzles in the first set of nozzles that have been determined to be defective. The second set of nozzles is not used for printing at less than the full resolution except for a subset of nozzles in the second set of nozzles that are used to replace nozzles from the first set of nozzles that have been determined to be defective.

Defective nozzle replacement in a printer

A method of printing on a substrate and a printer are provided. The method uses a printer comprising a print head and a mask having a hole therethrough, the mask being disposed between the print head and the substrate, and comprises aligning the hole with the print head; printing on the substrate through the hole; and misaligning the hole with the print head so that the print head is covered by the mask. The method may allow the servicing of a print head in the array while the printer is printing on the substrate using at least one of the remainder of the print heads in the array.

Printers and printhead cleaning primarily in page-wide array printers

A printing apparatus comprises a printing device and a laminating device that work in an integrated operation, such that in normal operation the print media extends between the printing device and the laminating device; the printing device comprises means for printing at least one plot on said media while it advances in a first media advance direction, and the laminating device comprises means for laminating at least one printed plot in a second advance direction of said print media which is opposite to said first advance direction. The laminating device may comprise means for selectively inactivating lamination when print media travels therethrough. A method for printing and laminating at least part of a print media in an integrated operation is such that printing of at least one plot is performed in a first advance direction of said print media and subsequent laminating of at least one printed plot is performed in a second advance direction of said print media, opposite to said first advance direction.

Apparatus and method for printing and laminating media

Method for assessing color performance in a printing device

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Barcelona, Spain

Jordi Sender