Hp Indigo B.v.

Hewlett-packard Development Company, L.p.

Amit Porat

Alon Froom

Meir Grinstein

Maty Verner

Ziv Gilan

Eyal Peleg

Alex Feygelman

Lavi Cohen

Shlomo Harush

Asaf Shoshani

Sharon Nagler

Zvi Shemer

Niv Shemtov

Lior Fishbain

Natty Levy

In an example, a printing device comprises a component to engage with a surface, a first load sensor, a second load sensor and a controller. The component has a first part which is drivable to engage and disengage with the surface by a first engagement device and a second part which is drivable to engage and disengage with the surface by a second engagement device. The first load sensor is to measure a load on the first engagement device. The second load sensor is to measure a load on the second engagement device. The controller is to receive first load information from the first load sensor and second load information from the second load sensor; and determine whether or not to alter an operational parameter of the printing device, based on the received first load information and the received second load information.

Altering the operation of printing devices having engageable components

Measures for controlling an engagement force between a photo imaging plate and a developer roller in a printing device are described. A motor is operated to generate rotational motion. The rotational motion is translated into linear motion. The linear motion causes an adjustment to the engagement force between the developer roller and the photo imaging plate. A characteristic of the motor is monitored. The motor is controlled on the basis of the monitored characteristic in order to maintain a desired engagement force between the developer roller and the photo imaging plate.

Controlling engagement force

Measures for controlling an engagement force between a photo imaging plate () and a developer roller () in a printing device () are described. A motor () is operated to generate rotational motion. The rotational motion is translated into linear motion. The linear motion causes an adjustment to the engagement force between the developer roller and the photo imaging plate. A characteristic of the motor is monitored. The motor is controlled on the basis of the monitored characteristic in order to maintain a desired engagement force between the developer roller and the photo imaging plate.

A press includes a blanket cylinder, an impression cylinder, and a roller. The impression cylinder rollingly engages the blanket cylinder to form a nip and includes at least one gripper configured to selectively secure an end of a media sheet relative to the impression cylinder. The roller is selectively engageable against the impression cylinder to apply to pressure to the secured media sheet prior to its passage through the nip.

Media pressure roller for a press

A method of calibrating an optical density sensor comprising calculating a first pigment solid density value of an ink solution using a current first electrical output signal value from a photodetector, a current second electrical output signal value from a photodetector, and a current lens gap value, calculating a second pigment solid density value of the ink solution using a previously measured first electrical output signal value, a previously measured second electrical output signal value, and a previously measured lens gap value, comparing the current first electrical output signal value, the current second electrical output signal value, and the current lens gap value with the previously measured first electrical output signal value, the previously measure second electrical output signal value, and the previously measured lens gap value, and comparing the first pigment solid density value with the second pigment solid density value.

Optical density sensor calibration and self fixing

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Ness Ziona, Israel

Amit Porat