Hewlett-packard Development Company, L.P.

Hewlett-packard Indigo B.v.

Yaniv Yona

Avichay Mor-Yosef

Doron Shaked

Hila Nachlieli

Lavi Cohen

Asaf Shoshani

Shai Druckman

Boaz Eden

Maya Shalev

Eran Schwimmer

A print apparatus is disclosed. In an example, the print apparatus comprises: a photoconductive surface to receive a latent image representative of an image to be printed onto a printable substrate; a plurality of print components, each print component having a surface movable relative to the photoconductive surface, wherein a current or voltage is to be applied between the print component surface and the photoconductive surface; and processing circuitry to: measure a current or voltage between each print component surface and the photoconductive surface; responsive to detecting a deviation in the measured current or voltage from a reference current or voltage in respect of any of the plurality of print components, determine that there exists a defect associated with the photoconductive surface; and determine, based on the amount of deviation of the measured current or voltage from the reference current or voltage, an indication of the size of the defect.

Determining the existence of defects in print apparatuses

A cast device useable with an image forming apparatus is provided. The cast device includes at least one tube and a cast body. The cast body includes the at least one tube implanted into the cast body using a combined casting process.

Cast device with implanted tubes

A roller device includes a cylinder member. The cylinder member includes wall member having a plurality of channels that are disposed within the wall member. The channels circulate a fluid therein to uniformly regulate a temperature of the cylinder member.

Regulating temperature of a roller device

A method, diagnostic tool and system are provided for evaluating printing defects. A captured image of a printed sheet is received and a profile generated of the printed sheet, this profile being representative of tonal variations in the printed sheet. The profile is analyzed in a plurality of different scales and an assessment made of the significance of one or more features of a printing defect throughout the plurality of different scales. From the assessed significance of the one or more features, an evaluation is carried out, in each of the plurality of different scales, of the severity of the printing defect.

Method and apparatus for evaluating printed images

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Nes Ziona, Israel

Yaniv Yona