Abstract: A print agent transfer assembly including a print agent transfer member to receive a first layer and a second layer of print agent, and an energy source to provide energy at a first predetermined intensity level to the first layer and to provide energy at a second, different predetermined intensity level to the second layer.

Abstract: An example method includes concentrating first printing liquid on a conveyor. Concentrating the first printing liquid produces liquid carrier having a low non-volatile solid concentration. The method also includes concentrating the liquid carrier having the low non-volatile solid concentration on a developer roller. Concentrating the liquid carrier having the low non-volatile solid concentration produces liquid carrier substantially free of non-volatile solids. The method also includes delivering the liquid carrier substantially free of non-volatile solids to a storage vessel.

Abstract: In one example of the disclosure, a first transfer of ink is made from a photoconductor to a blanket in contact with the photoconductor. The blanket is to cycle along a path. The first transfer occurs at a first arc of the blanket path. A second transfer of the ink is made from the blanket to a media in contact with the blanket. The second transfer occurs at a second arc of the blanket path. A heat source located adjacent to a third arc of the blanket path is utilized to heat an external surface of the blanket. The heating is to occur following the second transfer of the ink.

Abstract: According to one example, there is provided a visual security feature. The visual security feature comprises a security feature printed on a media. The security feature includes a security code printed on the media, and a holographic image is embossed on the printed security feature.

Abstract: In one example, a system for transferring an image from a photoconductor to a print substrate includes a transfer member having a removable blanket wrapped around a rotatable drum and a laser. The blanket has a light absorbing exterior surface to receive a liquid LEP ink image from the photoconductor and to release a layer of molten toner to a print substrate. As the drum rotates, the laser exposes a width of the exterior surface of the blanket carrying a liquid LEP ink image to a beam of coherent light that delivers enough power to transform the liquid LEP ink image into molten toner.

Abstract: In an example, a condenser apparatus to condense vapored fluid has a gas inlet, a mesh, a cooling element, and a gas outlet. The mesh is configured to carry a layer of condensed fluid. The cooling element is configured to cool the layer of condensed fluid. The mesh is configured to let pass through vapored fluid and to create bubbles including vapored fluid in the layer of condensed fluid.

Abstract: In a method and an apparatus for forming on a substrate (214) a pattern of a material, a material layer is provided on an intermediate carrier (204) and an adhesive layer is provided on the material layer, wherein at least one of the material layer or the adhesive layer comprises a pattern corresponding to the pattern to be formed on the substrate (214). The material is transferred to the substrate (214) with the adhesive fixing the material to a surface (216) of the substrate (214).

Abstract: A method comprises: providing a first stream of discrete volumes (908b) of material, and directing a pulsed laser beam (912) at a first discrete volume (908b) of material in the first stream of discrete volumes of material so as to interact with the first discrete volume of material and thereby displace the first discrete volume away from the first stream. An apparatus and a system for achieving such steps are also disclosed.

Abstract: A print agent transfer assembly (200) comprising a print agent transfer member ((202) to receive a first layer and second layer of print agent, and an energy source (208) to provide energy at a first predetermined intensity level to the first layer and to provide energy at a second, different, predetermined intensity level to the second layer.

Abstract: The present disclosure provides systems and methods that enable parameter-efficient transfer learning, multi-task learning, and/or other forms of model re-purposing such as model personalization or domain adaptation. In particular, as one example, a computing system can obtain a machine-learned model that has been previously trained on a first training dataset to perform a first task. The machine-learned model can include a first set of learnable parameters. The computing system can modify the machine-learned model to include a model patch, where the model patch includes a second set of learnable parameters. The computing system can train the machine-learned model on a second training dataset to perform a second task that is different from the first task, which may include learning new values for the second set of learnable parameters included in the model patch while keeping at least some (e.g., all) of the first set of parameters fixed.

Abstract: An example apparatus includes a conveyor. The apparatus also includes a first developer unit. The first developer unit is to concentrate first printing liquid. The first developer unit also is to deliver the first printing liquid to the conveyor. The apparatus also includes a second developer unit. The second developer unit is to concentrate second printing liquid. The second developer also is to deliver the second printing liquid to the conveyor to form a thick layer of printing liquid comprising the first and second printing liquid.

Abstract: An example method of collecting liquid carrier from a vapour in a printing system includes: heating a vapour carrying a liquid carrier and passing the heated vapour carrying liquid carrier through a volume of liquid carrier. Liquid carrier carried in the heated vapour condenses into the volume of liquid carrier as it passes through the volume of liquid carrier.

Abstract: A method for forming on a substrate (108; 214) a pattern of a material, the method comprising: providing (S100) a material layer (104); providing (S104, S106) an adhesive layer (106), wherein at least one of the material layer (104) or the adhesive layer (106) comprises a pattern corresponding to the pattern to be formed on the substrate (108; 214); and transferring (S108) the material to the substrate (108; 214) with the adhesive fixing the material to a surface (110; 216) of the substrate (108; 214). This solves the problem of forming on a substrate a pattern of a material that, in general, cannot be applied to the substrate directly due to the fact that the material cannot be printed and/or has no or reduced adherence properties with respect to the substrate.

Abstract: In one example of the disclosure, a first transfer of ink is made from a photoconductor to a blanket in contact with the photoconductor. The blanket is to cycle along a path. The first transfer occurs at a first arc of the blanket path. A second transfer of the ink is made from the blanket to a media in contact with the blanket. The second transfer occurs at a second arc of the blanket path. A heat source located adjacent to a third arc of the blanket path is utilized to heat an external surface of the blanket. The heating is to occur following the second transfer of the ink.

Abstract: A method of operating an electrophotographic printer (100) to control the optical density of a printed image is described. The method comprises providing a printing substance on a transfer member (104); emitting a pulse of heat to heat the printing substance on the transfer member to increase flowability of the printing substance on the transfer member; and transferring, from the transfer member to a substrate (108), the printing substance heated by the pulse of heat so as to provide the printed image on the substrate.

Abstract: In an example, an apparatus is described that includes a photosensitive imaging plate, an intermediate transfer member, and a heating unit. The photosensitive imaging plate attracts a layer of printing fluid. The intermediate transfer member contacts the photosensitive imaging plate and receives the layer of printing fluid from the photosensitive imaging plate. The heating unit includes an array of individually addressable heating elements and heats the intermediate transfer member in a manner that is spatially selective along two axes: a first axis in a direction of a width of the intermediate transfer member and a second axis in a direction of a rotation of the intermediate transfer member.

Abstract: An example apparatus includes a conveyor. The apparatus also includes a first developer unit. The first developer unit is to concentrate first printing liquid. The first developer unit also is to deliver the first printing liquid to the conveyor. The apparatus also includes a second developer unit. The second developer unit is to concentrate second printing liquid. The second developer also is to deliver the second printing liquid to the conveyor to form a thick layer of printing liquid comprising the first and second printing liquid.

Abstract: In one example, a system for transferring an image from a photoconductor to a print substrate includes a transfer member having a removable blanket wrapped around a rotatable drum and a laser. The blanket has a light absorbing exterior surface to receive a liquid LEP ink image from the photoconductor and to release a layer of molten toner to a print substrate. As the drum rotates, the laser exposes a width of the exterior surface of the blanket carrying a liquid LEP ink image to a beam of coherent light that delivers enough power to transform the liquid LEP ink image into molten toner.

Abstract: In an example, an apparatus is described that includes a photosensitive imaging plate, an intermediate transfer member, and a heating unit. The photosensitive imaging plate attracts a layer of printing fluid. The intermediate transfer member contacts the photosensitive imaging plate and receives the layer of printing fluid from the photosensitive imaging plate. The heating unit includes an array of individually addressable heating elements and heats the intermediate transfer member in a manner that is spatially selective along two axes; a first axis in a direction of a width of the intermediate transfer member and a second axis in a direction of a rotation of the intermediate transfer member.

Abstract: In one example, a system for transferring an image from a photoconductor to a print substrate includes a transfer member having a removable blanket wrapped around a rotatable drum and a laser. The blanket has a light absorbing exterior surface to receive a liquid LEP ink image from the photoconductor and to release a layer of molten toner to a print substrate. As the drum rotates, the laser exposes a width of the exterior surface of the blanket carrying a liquid LEP ink image to a beam of coherent light that delivers enough power to transform the liquid LEP ink image into molten toner.