Selective wetting of a roller

US11638927B2 · kind B2 · utility

Assignee

• HP INDIGO B.V. · NL

Inventors

• Alex Lipnizkiy · Nes Ziona, IL
• Mordechai Arenson · Nes Ziona, IL
• Marko Richter · Nes Ziona, IL
• Yossi Yaacobov · Nes Ziona, IL
• Gil Fisher · Shoham, IL
• Michael Vinokur · Vaughan, CA
• Nadav Shalem · Nes Ziona, IL
• Chen Talmor · Givat Ada, IL

Key dates

• Filing date: Sep 15, 2017
• Grant date: May 2, 2023
• Expiry date: Oct 30, 2037

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41P2235/40
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

There is disclosed a selective wetting apparatus comprising a roller rotatable about a roller axis and comprising a wettable roller surface; an applicator unit having a lip which extends parallel to the roller axis and is radially spaced apart from the roller surface by a gap, wherein the applicator unit is to convey liquid agent towards the roller so that the liquid agent forms a liquid bridge over the gap to wet a wetted axial portion of the roller surface; and a flow guide to direct a gas flow into a regulated axial portion of the gap to locally prevent formation of a liquid bridge, and thereby prevent wetting of a corresponding axial portion of the roller surface.