Abstract: A printer unit (100) for a 3D-printing apparatus. The printer unit comprises a printer head (105) comprising a nozzle (110) arranged to deposit printing material from the printer unit, a pressure sensor (120) configured to sense a pressure exerted on the printer head from the printing material, and a control unit (130) coupled to the pressure sensor. The control unit is configured to control the speed of the printer head based on a transfer function from the pressure sensed by the pressure sensor to a desired speed of the printer head, in order to maintain a constant deposition of the amount of printing material per length unit of deposited printing material.

Abstract: A triboelectric energy generator (1) comprises a first generating element (8) and a second generating element (10). The first generating element comprises a first triboelectric material (9) and the second generating element comprises a second triboelectric material (13). Movement of the second generation element relative to the first generation element results in an output voltage, as a consequence of the triboelectric effect. A stopper (7) is configured to restrict rotation of the second generating element, so that the second generating element may only rotate through a desired angle.

Abstract: A printer head (200, 300, 400) for a 3D-printing apparatus, comprising a nozzle (210, 310, 450) arranged to deposit one or more adjacently arranged filaments of printing material to form at least one layer of an object to be produced. The nozzle comprises at least one exterior surface (220) configured to be brought into abutting contact with a peripheral edge (280) of the at least one layer, and configured to be guided along the peripheral edge of the at least one layer and on a predetermined distance into the at least one layer.

Abstract: A printer head (200, 300, 400) for a 3D-printing apparatus, comprising a nozzle (210, 310, 450) arranged to deposit one or more adjacently arranged filaments of printing material to form at least one layer of an object to be produced. The nozzle comprises at least one exterior surface (220) configured to be brought into abutting contact with a peripheral edge (280) of the at least one layer, and configured to be guided along the peripheral edge of the at least one layer and on a predetermined distance into the at least one layer.

Abstract: A printer unit (100) for a 3D-printing apparatus for deposition of a printing material, as well as a method of 3D printing, is provided. The printer unit comprises a printer head (105) comprising a nozzle (110). The printer head is resiliently suspended in the printer unit in a vertical direction by at least one resilient means (120), allowing a vertical movement of the printer head during deposition of the printing material. The suspended printer head in its equilibrium is positionable above the underlying material at a vertical distance (?z1) before deposition. During deposition of printing material, the at least one resilient means is configured to become biased by a vertical force (F3) on the nozzle from the printing material on the underlying material, such that the printer head moves from its equilibrium into a position at a desired vertical distance (?z1) from the underlying material.

Abstract: The invention provides an energy generation system comprising a generator having charged mutually rotating plate elements, and comprising an integrated drive mechanism for precisely controlling a separation distance between the plates. The drive mechanism provides a separation which varies as a function of the speed of rotation, hence assimilating separation control within the natural operation of the device. Embodiments provide plates comprising self-generating bearings, both hydrodynamic gas and fluid bearings and centrifugal regulator solid bearings, the bearings providing a supporting force between the plates of a magnitude which increases as the rotational speed of the plates increases. Methods of energy generation are also provided.

Abstract: A triboelectric energy generator (1) comprises a first generating element (8) and a second generating element (10). The first generating element comprises a first triboelectric material (9) and the second generating element comprises a second triboelectric material (13). Movement of the second generation element relative to the first generation element results in an output voltage, as a consequence of the triboelectric effect. A stopper (7) is configured to restrict rotation of the second generating element, so that the second generating element may only rotate through a desired angle.

Abstract: An energy conversion system comprises a generator which generates electrical power in response to movement, wherein the generator comprises first and second elements which generate energy in an energy generation mode. In some examples, these can be brought into and out of contact with each other by a drive mechanism so that the energy conversion system has an (e.g.) intermittent charging mode in which the first and second 5 elements are brought into contact by the drive mechanism and an energy generation mode in which the first and second elements are out of contact. The relative speed, the spacing between, or the relative orientations or positions of the first and second elements are controlled during the energy generation mode to decrease the variation in output power or voltage of the generator. This system controls the physical positions or the motion of the 10 elements of the generator during the energy generation mode in order to implement a more constant power or voltage generation.

Abstract: A device for treating skin includes a skin treatment member, a skin contacting surface, a mounting member for mounting the skin treatment member and the skin contacting surface, and a friction controlling device to control friction between the skin contacting surface and skin to be treated, in at least one controlled friction area of the skin contacting surface when the skin contacting surface is moved over the skin. The friction controlling device introduces a slip motion of the controlled friction area relative to the mounting member in a direction corresponding to a local direction of extension of the skin contacting surface. The device also includes a sensor for detecting a first parameter related to an amount of friction between the skin contacting surface and the skin during use, and the friction controlling device controls a second parameter of the slip motion in dependence on a value of the first parameter.

Abstract: The invention provides a power generation device comprising at least two generating arrangements, each adapted to generate a voltage output through the relative motion of two differently charged generating elements, the generating elements having some separation distance (which may be zero or non-zero). The arrangements are co-operatively configured in such a way that the separation distances between their respective elements are reciprocally related: an increase in one leads to a related decrease in the other. By combining these two signal outputs, a single voltage, current or power output may be provided in a self-regulating manner by the device whose amplitude is substantially independent of any changes or variations in the separation distance between elements of either of the two arrangements.

Abstract: The invention provides an energy generation system comprising a generator having charged mutually rotating plate elements, and comprising an integrated drive mechanism for precisely controlling a separation distance between the plates. The drive mechanism provides a separation which varies as a function of the speed of rotation, hence assimilating separation control within the natural operation of the device. Embodiments provide plates comprising self-generating bearings, both hydrodynamic gas and fluid bearings and centrifugal regulator solid bearings, the bearings providing a supporting force between the plates of a magnitude which increases as the rotational speed of the plates increases. Methods of energy generation are also provided.

Abstract: The invention provides an energy generation system comprising a generator having charged mutually rotating plate elements, and comprising an integrated drive mechanism for precisely controlling a separation distance between the plates. The drive mechanism provides a separation which varies as a function of the speed of rotation, hence assimilating separation control within the natural operation of the device. Embodiments provide plates comprising self-generating bearings, both hydrodynamic gas and fluid bearings and centrifugal regulator solid bearings, the bearings providing a supporting force between the plates of a magnitude which increases as the rotational speed of the plates increases. Methods of energy generation are also provided.

Abstract: The invention provides a device for generating electrical currents of a particular desired waveform through the combining of a plurality of different frequency output currents generated by plurality of power generating arrangements. The power generating arrangements each comprise at least first and second sets of generating elements, configured to hold a relative charge and to be moveable with respect to one another in order to generate an electrical output current of a particular frequency.

Abstract: A printer unit (100) for a 3D-printing apparatus. The printer unit comprises a printer head (105) comprising a nozzle (110) arranged to deposit printing material from the printer unit, a pressure sensor (120) configured to sense a pressure exerted on the printer head from the printing material, and a control unit (130) coupled to the pressure sensor. The control unit is configured to control the speed of the printer head based on a transfer function from the pressure sensed by the pressure sensor to a desired speed of the printer head, in order to maintain a constant deposition of the amount of printing material per length unit of deposited printing material.

Abstract: A printer unit (100) for a 3D-printing apparatus for deposition of a printing material, as well as a method of 3D printing, is provided. The printer unit comprises a printer head (105) comprising a nozzle (110). The printer head is resiliently suspended in the printer unit in a vertical direction by at least one resilient means (120), allowing a vertical movement of the printer head during deposition of the printing material. The suspended printer head in its equilibrium is positionable above the underlying material at a vertical distance (?z1) before deposition. During deposition of printing material, the at least one resilient means is configured to become biased by a vertical force (F3) on the nozzle from the printing material on the underlying material, such that the printer head moves from its equilibrium into a position at a desired vertical distance (?z1) from the underlying material.

Abstract: A printer head (200, 300, 400) for a 3D-printing apparatus, comprising a nozzle (210, 310, 450) arranged to deposit one or more adjacently arranged filaments of printing material to form at least one layer of an object to be produced. The nozzle comprises at least one exterior surface (220) configured to be brought into abutting contact with a peripheral edge (280) of the at least one layer, and configured to be guided along the peripheral edge of the at least one layer and on a predetermined distance into the at least one layer.

Abstract: The invention provides a power generation device comprising at least two generating arrangements, each adapted to generate a voltage output through the relative motion of two differently charged generating elements, the generating elements having some separation distance (which may be zero or non-zero). The arrangements are co-operatively configured in such a way that the separation distances between their respective elements are reciprocally related: an increase in one leads to a related decrease in the other. By combining these two signal outputs, a single voltage, current or power output may be provided in a self-regulating manner by the device whose amplitude is substantially independent of any changes or variations in the separation distance between elements of either of the two arrangements.

Abstract: An energy conversion system comprises a generator which generates electrical power in response to movement, wherein the generator comprises first and second elements which generate energy in an energy generation mode. In some examples, these can be brought into and out of contact with each other by a drive mechanism so that the energy conversion system has an (e.g.) intermittent charging mode in which the first and second 5 elements are brought into contact by the drive mechanism and an energy generation mode in which the first and second elements are out of contact. The relative speed, the spacing between, or the relative orientations or positions of the first and second elements are controlled during the energy generation mode to decrease the variation in output power or voltage of the generator. This system controls the physical positions or the motion of the 10 elements of the generator during the energy generation mode in order to implement a more constant power or voltage generation.

Abstract: The invention provides a device for generating electrical currents of a particular desired waveform through the combining of a plurality of different frequency output currents generated by plurality of power generating arrangements. The power generating arrangements each comprise at least first and second sets of generating elements, configured to hold a relative charge and to be moveable with respect to one another in order to generate an electrical output current of a particular frequency.

Abstract: The invention provides an energy generation system comprising a generator having charged mutually rotating plate elements, and comprising an integrated drive mechanism for precisely controlling a separation distance between the plates. The drive mechanism provides a separation which varies as a function of the speed of rotation, hence assimilating separation control within the natural operation of the device. Embodiments provide plates comprising self-generating bearings, both hydrodynamic gas and fluid bearings and centrifugal regulator solid bearings, the bearings providing a supporting force between the plates of a magnitude which increases as the rotational speed of the plates increases. Methods of energy generation are also provided.