Abstract: Disclosed herein is a print head maintenance cartridge, a printing device and a method of controlling a wiping subsystem of a print head maintenance cartridge. The print head maintenance cartridge comprises a wiping subsystem with a wiping material to wipe a print head; a clean material roll, wherein a clean part of the wiping material is rolled up on the clean material roll at least in part; a brake to generate a first brake force applied to the wiping material; and a friction element to generate a second brake force applied to the wiping material, wherein the friction element compensates at least in part a change in the first brake force to control a total brake force, wherein the total brake force is the sum of the first and second brake forces.

Abstract: Disclosed herein is a print head maintenance assembly, a printing device and a method of cleaning a print head. The print head maintenance assembly comprises a maintenance cartridge comprising a wiping subsystem with a wiper for wiping a print head; a scraper assembly with a scraper for cleaning the wiper; and a positioner to adjust a relative position between the scraper and the wiper in a first direction depending on a relative position between the maintenance cartridge and the scraper assembly in a second direction.

Abstract: Method and tools for sensing pen-to-reference space (PRS) are disclosed. Example removable pen-to-reference space (PRS) sensing tools for a printer comprise proximity sensors and a body. The body has a printer mounting portion, corresponding to a printhead mounting socket of the printer, and a sensor portion, hosting the proximity sensor.

Abstract: Disclosed herein is a print head maintenance assembly, a printing device and a method of controlling a print head maintenance assembly in a printing device. The print head maintenance assembly comprises a maintenance cartridge comprising a positioning flag, wherein the maintenance cartridge is movable along a maintenance path in a direction of movement; and a sensor to detect the positioning flag to determine the position of the maintenance cartridge along the maintenance path.

Abstract: A cartridge for a printing system comprises a receptacle to receive waste printing material from the printing system, a floater to change its position based on a varying filling level of the waste printing material in the receptacle, and a flag mechanically coupled to the floater, wherein a position of the flag depends on the position of the floater and indicates, outside of the receptacle, the filling level.

Abstract: Disclosed herein is a print head maintenance cartridge, a printing device and a method of controlling a wiping subsystem of a print head maintenance cartridge. The print head maintenance cartridge comprises a wiping subsystem with a wiping material to wipe a print head; a clean material roll, wherein a clean part of the wiping material is rolled up on the clean material roll at least in part; a brake to generate a first brake force applied to the wiping material; and a friction element to generate a second brake force applied to the wiping material, wherein the friction element compensates at least in part a change in the first brake force to control a total brake force, wherein the total brake force is the sum of the first and second brake forces.

Abstract: A cartridge for a printing system comprises a receptacle to receive waste printing material from the printing system, a floater to change its position based on a varying filling level of the waste printing material in the receptacle, and a flag mechanically coupled to the floater, wherein a position of the flag depends on the position of the floater and indicates, outside of the receptacle, the filling level.

Abstract: A printhead service station comprises a printhead cleaner, a motor to move the printhead cleaner along a first direction during a printhead cleaning operation, and a spitroller to catch waste printing liquid during printhead cleaning. Therein, an axis of rotation of the spitroller is oriented substantially parallel to the first direction, and a rotation of the spitroller is driven by the motor.

Abstract: Disclosed herein is a print head maintenance assembly, a printing device and a method of controlling a print head maintenance assembly in a printing device. The print head maintenance assembly comprises a maintenance cartridge comprising a positioning flag, wherein the maintenance cartridge is movable along a maintenance path in a direction of movement; and a sensor to detect the positioning flag to determine the position of the maintenance cartridge along the maintenance path.

Abstract: Disclosed herein is a spittoon cartridge for a printing device, a printing device and a method of controlling a spittoon cartridge. The spittoon cartridge comprises a waste tank to store material ejected from a print head; a transfer unit to transfer material ejected from the print head into the waste tank; and a floater movably arranged in the spittoon cartridge, wherein a position of the floater depends on a filling level of the waste tank and wherein the floater impedes transfer of material by the transfer unit if the floater reaches a predefined warning position.

Abstract: Method and tools for sensing pen-to-reference space (PRS) are disclosed. Example removable pen-to-reference space (PRS) sensing tools for a printer comprise proximity sensors and a body. The body has a printer mounting portion, corresponding to a printhead mounting socket of the printer, and a sensor portion, hosting the proximity sensor.

Abstract: Spectrophotometer for the characterization of receivers of solar collectors in order to determine optical properties (transmittance and reflectance). The equipment allows the evaluation of a receiver tube in real time and in any kind of light conditions, both inside and outside. The equipment also allows the detection of the eccentricity between the outer tube and the inner tube, which directly influences the reliability of the measurement. The equipment has a mechanical system for allowing a rotation of the equipment around the tube in order to find the optimum measurement position and attach itself to the tube.

Abstract: Spectrophotometer for the characterisation of receivers of solar collectors in order to determine optical properties (transmittance and reflectance). The equipment allows the evaluation of a receiver tube in real time and in any kind of light conditions, both inside and outside. The equipment also allows the detection of the eccentricity between the outer tube and the inner tube, which directly influences the reliability of the measurement. The equipment has a mechanical system for allowing a rotation of the equipment around the tube in order to find the optimum measurement position and attach itself to the tube.

Abstract: The invention relates to a spectrophotometer for the automated optical characterization of solar collector tubes and to a method for the operation thereof, that measures the coefficient of transmission of the glass tube and of reflection of the metal tube. The device includes all the necessary components for taking said measurement, such as the optical bench supporting the tube, the standard or framework, and the optical modules for the device, a main module that generates the light bundles, a measuring module that measures the coefficient of transmission of the outer glass tube and the coefficient of reflection of the inner metal tube, a mechanical system of tube rotation, an electronic system of data acquisition and processing, an external computer for controlling the device and processing the data measured, and a system of communication between the device and the computer.