Hp Indigo B.v.

Hewlett-Packard Indigo B.v.

Hewlett-Packard Development Company, L.p.

Indigo N.v.

Mark Sandler

Shai Lior

Peter Nedelin

Assaf Pines

Dror Kella

Gideon Amir

Doron Schlumm

Avner Schneider

Yaron Grinwald

Hannoch Ron

Daniel Skvirsky

Albert Teishev

Eyal Peleg

Gil Fisher

Michael Plotkin

Boaz Tagansky

Shahar Stein

Marc Klein

Gleb Romantcov

Giries Kadis

Eyal Negreanu

George Trendafilov

Marko Richter

Zvi Shemer

Ilan Frydman

Tsahi Rosenbaom

Guy Hamou

Yaron Peri

Nati Sinuany

Eran Schwimmer

Inna Tzomik

Moshe Levanon

Gil Bar-Haim

Reut Avigdor

Eyal Bachar

Faina Kogan

Itzhak Ashkenazi

Oded Sagiv

Gidi Amir

Yossi Rosen

Oren Wilde

Barak Rosenstein

David Idan

Israel Patla

Danny Gerstenfeld

Eran Gonen

Itay Eyal

Rita Reznikov

Haim Gefen

Noa Falk Yogev

Asaf Miron

Omer De-shalit

George Trenda Filov

Rita Feldman

Ian Frydman

In an example of the disclosure, a heat exchange and flame arrest device for use with a subject gas includes tubing arranged to traverse a core, with the tubing defining a cooling fluid pathway. The core includes a gas flow inlet, a set of cooling fins, and a gas flow outlet. The gas flow inlet, the set of cooling fins, and the gas flow outlet collectively form a gas flow pathway for a subject gas. Each cooling fin of the set is positioned to form a gap between that cooling fin and an adjacent cooling fin. The gas flow inlet is to receive the subject gas. The combination of the gap between each cooling fin of the set and the cooling capacity of the cooling fluid pathway is sufficient to, if the subject gas has ignited, lower temperature of the subject gas to below autoignition temperature.

Heat exchange and flame arrest

A printing apparatus has a transfer member to receive an image and transfer the image to a substrate, and an airflow management unit disposed adjacent to the transfer member to define a channel between the transfer member and the airflow management unit. The airflow management unit has an injection mechanism to inject airflow into the channel, a suction mechanism to remove the airflow from the channel, and a vortex generator to generate a vortex within the channel.

Printer with airflow module

In an example of the disclosure, an intermediate transfer member cleaning system includes an intermediate transfer member ('blanket'), an endless cleaning surface, and a pyrolysis station. The blanket is to receive a thermoplastic print agent from a photoconductive element. The endless cleaning surface can be positioned to rotatably engage with the blanket to transfer a residue of the thermoplastic print agent from the blanket to the endless cleaning surface. The endless cleaning surface can be moved away from the blanket to enter a pyrolysis station. The pyrolysis station is for receiving the endless cleaning surface, for heating the endless cleaning surface to convert the residue to ash, and for removing the ash.

Intermediate transfer member cleaning

Described herein is a liquid electrophotographic photovoltaic ink composition comprising: a dispersion of a material with a perovskite structure, a thermoplastic resin and conductive particles in a carrier liquid; wherein the material with a perovskite structure has a chemical formula selected from ABXand ABX; wherein A is a cation, B is a cation and X is an anion; and wherein the thermoplastic resin comprises: a copolymer of an alkylene monomer and a monomer having acidic side groups; and/or a copolymer of an alkylene monomer and an ethylenically unsaturated monomer comprising an epoxide; and/or a copolymer of an alkylene monomer, an ethylenically unsaturated monomer comprising an epoxide, and a monomer selected from a monomer having acidic side groups, a monomer having ester side groups and a mixture thereof. Also described is a method of producing a photovoltaic cell using the LEP ink and the printed cell produced by the method.

Photovoltaic cells

According to some examples in the disclosure, a method may comprise providing a first stream of discrete volumes of material; and directing a pulsed laser beam at a first discrete volume 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 are also disclosed.

Material displacement

An example method comprises identifying, by a processor, a gap in a housing of a printing apparatus and positioning an inlet of a conduit inside the housing proximate the gap. The inlet is fluidly connected to a fan, and the fan is powered to create a pressure differential across the housing to minimize the amount of air inside the housing being able to escape the housing via the gap.

Pressure diffrentials at printers

Disclosed is a method to mitigate deterioration of printing fluid in a tank of a printer. The method comprises: draining printing fluid from a tank of a printer, and stopping the draining before the tank is empty, wherein the printing fluid comprises solids suspended in imaging oil, filtering the printing fluid drained from the tank, to separate at least some of the solids from the imaging oil, passing the filtered imaging oil to a reservoir; and then passing imaging oil from the reservoir to the tank. Also disclosed is a printer and a system to perform the method.

Filtering printing fluid

An example system includes a conveyor. The conveyor is not a photoconductor. The system also includes a developer unit. The developer unit is to internally concentrate printing liquid. The developer unit also is to deliver the printing liquid to the conveyor. The system includes a wiper in contact with the conveyor. The wiper is to remove the printing liquid from the conveyor.

Printing liquids concentration

A print apparatus is disclosed. The print apparatus comprises a container-receiving unit for receiving a reusable print agent container; a print agent reservoir for storing print agent to be consumed by the print apparatus during a printing operation; a pump for transferring print agent between a reusable print agent container positioned in the container-receiving unit and the print agent reservoir; and processing circuitry. The processing circuitry is to operate the pump to transfer print agent of a first concentration from the reusable print agent container to the print agent reservoir; and, responsive to determining that a volume of print agent of the first concentration in the reusable print agent container has fallen below a threshold volume, operate the pump to transfer a volume of print agent of a second, lower concentration from the print agent reservoir to the reusable print agent container. A method and a machine-readable medium are also disclosed.

Print apparatuses using reusable print agent containers

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.

Blanket memory artifact reduction

In a method and an apparatus for forming on a substrate () a pattern of a material, a material layer is provided on an intermediate carrier () 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 (). The material is transferred to the substrate () with the adhesive fixing the material to a surface () of the substrate ().

Method and apparatus for forming on a substrate a pattern of a material

A method comprises: providing a first stream of discrete volumes () of material, and directing a pulsed laser beam () at a first discrete volume () 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.

Aspects presented herein are directed towards a carrier evaporator for a Liquid Electrophotography Printing (LEP) system. In an example, the carrier evaporator provides a hot air supply to absorb an evaporated carrier liquid resulting in first air flow comprising a carrier vapour, an evacuator to evacuate at least a portion of the carrier vapour, a heat exchanger to decrease a temperature of the remaining carrier vapour thereby transforming the first air flow to a second airflow comprising carrier particles, and a filter to remove the carrier particles from the second air flow.

Carrier evaporators for liquid electrophotography printing

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.

Growing community of inventors

Rehovot, Israel

Mark Sandler