Hp Indigo B.v.

Hewlett-packard Development Company, L.p.

Faina Kogan

Inna Tzomik

Daniel Skvirsky

Gleb Romantcov

Sergio Brandriss

Alexander Stolov

Hannoch Ron

Israel Patla

Ziv Gilan

Yaron Grinwald

Raia Slivniak

Chen Zigdon

Itay Eyal

Albert Teishev

Mark Sandler

Gil Fisher

Asaf Salant

Liora Braun

Boris Kaziev

Yaniv Kachlon

Daniel Tulchinski

Anna Razgon

Aviad Eliav

A printing apparatus has a photo imaging plate to be held at a first voltage having a first polarity, and an intermediate transfer member to receive an intermediate image from the photo imaging plate. The intermediate transfer member is to be held at a second voltage having a second polarity opposite to the first polarity. An electrically conductive member is disposed between the photo imaging plate and the intermediate transfer member.

Printing apparatus with leakage path for corona discharge

Herein is described a method of providing a printed label. The method comprises applying a radiation curable overcoat composition to a liquid electrostatically printed ink disposed on a label substrate; wherein the radiation curable overcoat composition comprises radiation curable monomers and/or oligomers; a photoinitiator; a polyalkylsiloxane containing at least two reactive functional groups, wherein the reactive functional groups are selected from hydrogen, hydroxyl, amino and a double bond; and a cross-linker containing at least two epoxide groups. Printed labels and a radiation curable overcoat composition are also described herein.

Labels

A method of forming a flexible printed material is described. The method comprises applying a layer of primer onto a flexible substrate; electrostatically printing onto the layer of primer a liquid electrostatic ink composition; applying a curable overprint varnish composition onto the printed electrostatic ink composition and curing the overprint varnish composition using electron beam irradiation. The curable overprint varnish composition comprises an ethylenically unsaturated monomer, an ethylenically unsaturated oligomer, or mixtures thereof, and less than 10 wt. % of a cross-linking additive based on the total weight of the curable overprint varnish composition. A flexible package comprising the flexible printed material is also described.

Flexible printed material

Described herein is a printed photovoltaic cell comprising an anode; an LEP printed cathode; and an LEP printed photovoltaic layer disposed between the anode and the cathode. The photovoltaic layer comprises a material with a perovskite structure having a chemical formula selected from ABXand ABXand a thermoplastic resin comprising 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. The printed cathode comprises: a thermoplastic resin; and electrically conductive metal particles. Also described herein is a method of producing the printed photovoltaic cell and an ink set for use in the method.

Photovoltaic cells

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.

Herein is described a method of providing a printed label. The method comprises: providing a printed label substrate having disposed thereon an electrostatically printed ink; applying a radiation curable overcoat composition to the printed ink, wherein the radiation curable overcoat composition comprises: radiation curable monomers and/or oligomers; a photoinitiator; and an organosilane having at least one hydrolysable group. Printed labels and an ink and overcoat set are also described herein.

Herein is described a scratch-off structure comprising the following layers in order: a substrate having a first layer showing information thereon, a second layer comprising a polymeric film and being substantially transparent; a third layer comprising a transparent electrostatic ink; a fourth layer, wherein the fourth layer is coloured. Methods for making scratch-off structures and collections of scratch-off structures are also described.

Scratch-off structures

In an aspect, there is provided a method of foil printing that may comprise providing a substrate having a surface comprising a first area and a second area, wherein the first area has printed thereon a first electrostatic ink composition comprising a first thermoplastic resin and substantially lacking a pigment and the second area has printed thereon a second electrostatic ink composition comprising a second thermoplastic resin and a pigment; applying a liquid solvent composition to the first electrostatic ink composition on the first area and the second electrostatic ink composition on the second area, to swell the first and second thermoplastic resins; and contacting a foiling material with the first electrostatic ink composition on the first area, such that the foiling material selectively adheres to the first area on the surface of the substrate. In another aspect, an electrostatic and foil printing system for performing the method is provided.

Foiling involving electrostatic inks

Herein is described a method of providing a printed label. The method comprises: providing a printed label substrate having disposed thereon an electrostatically printed ink; applying a UV curable overcoat composition to the printed ink, wherein the UV curable overcoat composition comprises (i) a component selected from UV curable monomers and UV curable oligomers, and (ii) a slip agent; curing the overcoat composition under UV irradiation with an output power of 2500 W or less. Printed labels and an ink and overcoat composition set are also described herein.

Printed labels with an overcoat

The present disclosure relates to a process for printing a substrate. The process comprises applying an analogue primer over a print substrate. A transparent electrophotographic composition comprising a coupling agent is electrophotographically printed on the primer as a coupling layer. An electrophotographic ink composition is then printed on the coupling layer to form an image layer. The coupling layer is disposed between the primer and image layer and in contact with each of the primer and image layer.

Printing substrates

The present disclosure relates to a process for selectively printing an image onto a substrate. The process comprises electrophotographically printing a first ink composition onto selected areas of a substrate. The process also comprises applying a primer over at least the unprinted areas of the substrate. A second ink composition is printed onto the primer and the first ink composition is removed from the selected areas of the substrate. The first ink composition is a transparent electrophotographic ink composition.

Selective printing

Herein is described a liquid electrophotographic adhesive composition comprising a thermoplastic resin, a moisture activatable adhesive, and a liquid carrier.

Liquid electrophotographic adhesive composition

There is provided a process for preparing a laminate, comprising electrostatically printing a transparent electrostatic ink composition onto a base material, wherein the transparent electrostatic ink composition comprises a thermoplastic resin, and a charge adjuvant and/or a charge director; providing a substrate; and contacting the substrate with the transparent electrostatic ink composition while the thermoplastic resin is softened or molten, and then allowing the thermoplastic resin to harden, so that the electrostatic ink composition adheres the base material and the substrate together. Laminate materials are also disclosed.

Laminates

There is provided a laminate, comprising a base material, a transparent electrostatic ink composition selectively disposed on portions of the base material, the transparent electrostatic ink composition comprising a thermoplastic resin, and a charge adjuvant and/or a charge director; a substrate adhered to the base material at the portions of the base material by the transparent electrostatic ink composition. A process for preparing a laminate and a blister pack are also disclosed.

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Nes Ziona, Israel

Faina Kogan