Abstract: Apparatus is described comprising a treatment chamber, a pump, a condenser and a secondary chamber. The treatment chamber comprises an interior into which an article to be treated can be disposed. The condenser, the pump and the secondary chamber are is in fluid communication with the treatment chamber in a closed loop to form a vapor extraction part of the apparatus. The apparatus may comprise a controller to control the operation of the apparatus automatically.

Abstract: A method for treating a polymer part comprising a step of bringing the part into contact with vapours of solvent(s), capable of at least partially solubilising the part, this contacting step being carried out under vacuum. Application of this method for modifying the roughness of the part and/or functionalising it.

Abstract: Object model data is obtained, defining an object to be generated by a three-dimensional printer. A frame is determined, suitable for supporting the object during post-processing of the generated object. Printer control data is generated comprising build data to control a three-dimensional printer to generate the object and the frame.

Abstract: Apparatus is described comprising a hermetically sealable treatment chamber, a pump and a disperser. The treatment chamber comprises an interior into which an article to be treated can be disposed. The pump is in fluidic communication with the interior of the treatment chamber to form a closed loop about which a dispersed treatment agent can circulate. The disperser is disposed within the closed loop and is arranged to disperse a treatment agent into the interior of the treatment chamber.

Abstract: In an example, a wiper system includes a first wiper blade, a second wiper blade, and a cam. In that example, the cam is coupled to the first wiper blade to move the first wiper blade to a first wipe position when the cam is in a first cam position and coupled to the second wiper blade to move the second wiper blade to a second wipe position when the cam is in a second cam position.

Abstract: In an example, a wiper system includes a first wiper blade, a second wiper blade, and a cam. In that example, the cam is coupled to the first wiper blade to move the first wiper blade to a first wipe position when the cam is in a first cam position and coupled to the second wiper blade to move the second wiper blade to a second wipe position when the cam is in a second cam position.

Abstract: A printer may comprise a printhead comprising a number of nozzles, an immiscible fluid applicator, and a processor to instruct the immiscible fluid applicator to apply immiscible fluid onto the surface of the printhead to cap the number of nozzles. A printer subassembly may comprise an immiscible fluid applicator to wipe a layer of immiscible fluid onto a surface of a printhead. A printer may comprise a page wide array printhead, an immiscible fluid applicator to wipe a layer of immiscible fluid over a printhead to cap nozzles over the width of the printhead, and a controller to instruct the printhead to print after the layer of immiscible fluid has been applied over the printhead so that ink ejects through the immiscible fluid while non-used nozzles remain capped by the immiscible fluid layer.

Abstract: In an example, a wiper system includes a first wiper blade, a second wiper blade, and a liquid dispenser. In that example, the liquid dispenser is oriented to eject liquid towards a cloth area across from the first wiper blade when the first wiper blade is in a rest position and the second wiper blade is in a service position.

Abstract: According to an example, a recoater for a three-dimensional (3D) printer may include a cylindrical element having a surface to spread build material particles. The build material particles may have a specified average dimension and the surface may include a plurality of depressions that have dimensions that are smaller than the specified average dimension of the build material particles.

Abstract: A printing system may comprise a page wide array printhead a capping station, and a number of modular caps comprising a housing to cover a nozzle array of a printhead and a cap coupler coupled to the housing to couple the cap to the nozzle array in which the modular caps are adapted to be coupled to and removed from the nozzle array of the printhead and stored in the capping station.

Abstract: In an example, a wiper system includes a first wiper blade, a second wiper blade, and a liquid dispenser. In that example, the liquid dispenser is oriented to eject liquid towards a cloth area across from the first wiper blade when the first wiper blade is in a rest position and the second wiper blade is in a service position.

Abstract: In an example, a wiper system includes a first wiper blade, a second wiper blade, and a cam. In that example, the cam is coupled to the first wiper blade to move the first wiper blade to a first wipe position when the cam is in a first cam position and coupled to the second wiper blade to move the second wiper blade to a second wipe position when the cam is in a second cam position.

Abstract: According to an example, a recoater for a three-dimensional (3D) printer may include a cylindrical element having a surface to spread build material particles. The build material particles may have a specified average dimension and the surface may include a plurality of depressions that have dimensions that are smaller than the specified average dimension of the build material particles.

Abstract: Methods and apparatus to control a heater associated with a printing nozzle are disclosed. A method comprising controlling a heater associated with a printing nozzle to reduce a heat output of the heater based on a determination that the printing nozzle is outside a print area and printing an image on a substrate using other printing nozzles while the heat output of the heater is reduced.

Abstract: A method of applying a cap to a printhead may comprise selectively applying an immiscible fluid to a surface of a printhead in which the immiscible fluid caps a number of nozzles on a number of nozzles defined within the printhead. A printhead may comprise a layer of immiscible fluid in which the immiscible fluid is selectively applied to the surface of the printhead and in which the immiscible fluid caps a number of nozzles defined within the printhead. A printer may comprise a printhead comprising a number of nozzles, an immiscible fluid applicator, and a processor to instruction the immiscible fluid applicator to apply a layer of immiscible fluid to the surface of the printhead.

Abstract: A printing system may comprise a page wide array printhead a capping station, and a number of modular caps comprising a housing to cover a nozzle array of a printhead and a cap coupler coupled to the housing to couple the cap to the nozzle array in which the modular caps are adapted to be coupled to and removed from the nozzle array of the printhead and stored in the capping station.

Abstract: Methods and apparatus to control a heater associated with a printing nozzle are disclosed. A method comprising controlling a heater associated with a printing nozzle to reduce a heat output of the heater based on a determination that the printing nozzle is outside a print area and printing an image on a substrate using other printing nozzles while the heat output of the heater is reduced.

Abstract: A printer may comprise a printhead comprising a number of nozzles, an immiscible fluid applicator, and a processor to instruct the immiscible fluid applicator to apply immiscible fluid onto the surface of the printhead to cap the number of nozzles. A printer subassembly may comprise an immiscible fluid applicator to wipe a layer of immiscible fluid onto a surface of a printhead. A printer may comprise a page wide array printhead, an immiscible fluid applicator to wipe a layer of immiscible fluid over a printhead to cap nozzles over the width of the printhead, and a controller to instruct the printhead to print after the layer of immiscible fluid has been applied over the printhead so that ink ejects through the immiscible fluid while non-used nozzles remain capped by the immiscible fluid layer.

Abstract: The present disclosure provides a waste ink spittoon for a printhead service station. The spittoon defines a reservoir for a waste ink composition ejected from a printhead. The spittoon comprises a gelling agent for increasing the viscosity of the waste ink composition, whereby the gelling agent comprises a particulate mass of solid particles of the gelling agent.

Abstract: An ink aerosol filtration system includes an inlet, a filtration chamber communicated with the inlet and including at least one filter member, and an airflow source communicated with the filtration chamber to generate flow into the inlet, through the filtration chamber and through the at least one filter member, wherein the airflow source is controlled to maintain substantially constant pressure at the inlet.