Inkjet printhead assembly including slotted shield plate

• US 9,539,819 B2
• Filed: 08/05/2015
• Issued: 01/10/2017
• Est. Priority Date: 06/30/1999
• Status: Expired due to Fees

• Current Assignee: Memjet Technology Ltd. (Memjet Limited)
• Original Assignee: Mernjet Technology Limited
• Inventors: Silverbrook, Kia, King, Tobin Allen
• Primary Examiner(s): NGUYEN, LAMSON D
• Application Number:
  US14/818,610
• Publication Number:
  US 20150336384A1
• Time in Patent Office: 524 Days
• US Class Current: 1/1
• CPC Class Codes: B41J 2/14 Structure thereof only for on-demand ink jet heads
• CPC Class Codes: B41J 2/1433 Structure of nozzle plates
• CPC Class Codes: B41J 2/145 Arrangement thereof
• CPC Class Codes: B41J 2/155 for line printing
• CPC Class Codes: B41J 2/175 Ink supply systems ; Circuit parts therefor
• CPC Class Codes: B41J 2/21 for multi-colour printing
• CPC Class Codes: B41J 2002/14362 Assembling elements of heads
• CPC Class Codes: B41J 2002/14419 Manifold
• CPC Class Codes: B41J 2002/14459 Matrix arrangement of the pressure chambers
• CPC Class Codes: B41J 2002/14491 Electrical connection
• CPC Class Codes: B41J 2202/19 Assembling head units
• CPC Class Codes: B41J 2202/20 Modules
• CPC Class Codes: B41J 2202/21 Line printing
• CPC Class Codes: Y10T 29/49401 Fluid pattern dispersing device making, e.g., ink jet

Abstract

An inkjet printhead assembly includes: a plurality of printhead segments arranged in two parallel rows in a staggered overlapping arrangement; and a slotted shield plate positioned relative to the printhead segments. Each of the printhead segments is exposed through the slotted shield plate.

Claims

1. An inkjet printhead assembly comprising:

a plurality of printhead segments arranged in two parallel rows in a staggered overlapping arrangement; and

a slotted shield plate positioned relative to the printhead segments,

wherein each of the printhead segments is exposed through the slotted shield plate.

2. The inkjet printhead assembly of claim 1, wherein each printhead segment is mounted on a respective printhead segment carrier.

3. The inkjet printhead assembly of claim 2, wherein each printhead segment carrier comprises a plurality of ink galleries having tapered sidewalls converging towards the printhead segment.

4. A method of ejecting ink from an inkjet printhead assembly, said method comprising the steps of:

supplying the ink to each of a plurality of printhead segments arranged in two parallel rows in a staggered overlapping arrangement; and

ejecting the ink from the plurality of printhead segments,

wherein a slotted shield plate is positioned relative to the printhead segments, and each of the printhead segments is exposed through the slotted shield plate.

5. The method of claim 4, wherein each printhead segment is mounted on a respective printhead segment carrier.

6. The method of claim 5, wherein each printhead segment carrier comprises a plurality of ink galleries having tapered sidewalls converging towards the printhead segment.