Landa Corporation Ltd.

Hewlett-packard Development Company, L.p.

Hewlett-packard Indigo B.v.

Landa Labs (2012) Ltd.

Indigo N.v.

Landa Labs Ltd.

Galia Golodetz

Benzion Landa

Sagi Abramovich

Gregory Nakhmanovich

Jose Kuperwasser

Dan Avital

Yehoshua Sheinman

Omer Ashkenazi

Moshe Levanon

Helena Chechik

Meir Soria

Tatiana Kurtser

Ayal Galili

Uriel Pomerantz

On Mero

Gal Victor

Ehud Chatow

Mattetyahu Litvak

Alon Asher

Steven J Simske

Paul Fenster

Peretz Ben-Avraham

Becky Bossidan

Yosef Cohen

Albert Teishev

Malgorzata M Sturgill

Jason S Aronoff

Vladislav Kaploun

Kok-Wei Koh

Udi Chatow

Snir Dor

Juan C Villa

Dan Scheffer

Edna Mannheim

Michal Gilady

Albert Teisheb

Haim Victor Gal

Victor Gal

Natalia Katz

Embodiments of the invention relate to a method of indirect printing with an aqueous ink. Related apparatus, systems and treatment formulations are disclosed herein. Some embodiments relate to an aqueous treatment formulation for use with an intermediate transfer member of a printing system. In some embodiments, the system comprises a treatment station disposed downstream of the impression station and upstream of the image forming station for forming a uniform thin layer of a liquid treatment formulation onto a surface of an intermediate transfer member (ITM) at a lower run thereof.

Digital printing process

A printing process is disclosed which comprises directing droplets of an ink onto an intermediate transfer member to form an ink image, the ink including an organic polymeric resin and a coloring agent in an aqueous carrier, and the transfer member having a hydrophobic outer surface so that each ink droplet in the ink image spreads on impinging upon the intermediate transfer member to form an ink film. The ink is dried while the ink image is being transported by the intermediate transfer member by evaporating the aqueous carrier from the ink image to leave a residue film of resin and coloring agent. The residue film is then transferred to a substrate. The chemical compositions of the ink and of the surface of the intermediate transfer member are selected such that attractive intermolecular forces between molecules in the outer skin of each droplet and on the surface of the intermediate transfer member counteract the tendency of the ink film produced by each droplet to bead under the action of the surface tension of the aqueous carrier, without causing each droplet to spread by wetting the surface of the intermediate transfer member.

Embodiments of the invention relate to a method of indirect printing with an aqueous ink. In some embodiments, an intermediate transfer member (ITM) comprising a silicone-based release layer surface is employed. For example, the release layer surface satisfies at least one of the following properties: (i) a receding contact angle of a drop of distilled water deposited on the silicone-based release layer surface is at most 60°; and (ii) a 10-second dynamic contact angle (DCA) of a drop of distilled water deposited on the silicone-based release layer surface is at most 108°. Related apparatus, systems and treatment formulations are disclosed herein.

Digital printing process and system

Ink formulations suitable for deposition upon the intermediate transfer member of an indirect printing system and for transfer therefrom to a substrate. The inks are aqueous inkjet inks comprising an organic polymeric resin and a colorant. Ink film constructions including a plurality of continuous ink films fixedly adhered to the printing substrate that can be obtained with these inks are also disclosed. The inks and the printed constructions are such that the ink films and the dried inks composing them have a first dynamic viscosity within a range of 10cP to 5·10cP at at least a first temperature within a first range of 60° C. to 87.5° C., and a second dynamic viscosity of at least 6·10cP, for at least a second temperature within a second range of 50° C. to 55° C.

Ink formulations and film constructions thereof

Embodiments of the invention relate to a method of indirect printing with an aqueous ink. In some embodiments, an intermediate transfer member (ITM) comprising a silicone-based release layer surface is employed. For example, the release layer surface satisfies at least one of the following properties: (i) a receding contact angle of a drop of distilled water deposited on the silicone-based release layer surface is at most 60&#xb0;; and (ii) a 10-second dynamic contact angle (DCA) of a drop of distilled water deposited on the silicone-based release layer surface is at most 108&#xb0;. Related apparatus, systems and treatment formulations are disclosed herein.

An ink film construction consisting: (a) a printing substrate; and (b) at least one ink film, fixedly adhered to a top surface of the printing substrate, the ink film having an upper film surface distal to the top surface of the substrate, wherein a surface concentration of nitrogen at the upper film surface exceeds a bulk concentration of nitrogen within the film, the bulk concentration measured at a depth of at least 30 nanometers below the upper film surface, and wherein a ratio of the surface concentration to the bulk concentration is at least 1.1 to 1.

Ink film constructions

Ink formulations suitable for deposition upon the intermediate transfer member of an indirect printing system and for transfer therefrom to a substrate. The inks are aqueous inkjet inks comprising an organic polymeric resin and a colorant. Ink film constructions including a plurality of continuous ink films fixedly adhered to the printing substrate that can be obtained with these inks are also disclosed. The inks and the printed constructions are such that the ink films and the dried inks composing them have a first dynamic viscosity within a range of 10cP to 5&#xb7;10cP at at least a first temperature within a first range of 60&#xb0; C. to 87.5&#xb0; C., and a second dynamic viscosity of at least 6&#xb7;10cP, for at least a second temperature within a second range of 50&#xb0; C. to 55&#xb0; C.

There are disclosed aqueous pigment dispersions containing dispersant-improving-agents, and methods of preparing and using the same.

Aqueous pigment dispersions

Growing community of inventors

Rehovot, Israel

Galia Golodetz