Inkjet printhead having a pre-determined array of inkjet nozzle assemblies

• US 7,441,867 B2
• Filed: 06/19/2006
• Issued: 10/28/2008
• Est. Priority Date: 10/16/1998
• Status: Expired due to Fees

• Current Assignee: Memjet Technology Ltd. (Memjet Limited)
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Silverbrook, Kia
• Primary Examiner(s): Nguyen; Lamson D
• Application Number:
  US11/454,901
• Publication Number:
  US 20060227156A1
• Time in Patent Office: 862 Days
• Field of Search: 347/12, 347/40, 347/43, 347/15, 347/13, 347/42
• US Class Current: 347/43
• CPC Class Codes: B05D 2201/00 Polymeric substrate or laminate
• CPC Class Codes: B05D 3/08 by flames
• CPC Class Codes: B41J 2/04528 aiming at warming up the head
• CPC Class Codes: B41J 2/04541 Specific driving circuit
• CPC Class Codes: B41J 2/04543 Block driving
• CPC Class Codes: B41J 2/04553 detecting ambient temperature
• CPC Class Codes: B41J 2/04563 detecting head temperature; Ink temperature
• CPC Class Codes: B41J 2/04571 detecting viscosity
• CPC Class Codes: B41J 2/04585 controlling heads based on thermal bent actuators
• CPC Class Codes: B41J 2/04588 using a specific waveform
• CPC Class Codes: B41J 2/04591 Width of the driving signal being adjusted
• CPC Class Codes: B41J 2/04596 Non-ejecting pulses
• CPC Class Codes: B41J 2/14 Structure thereof only for on-demand ink jet heads
• CPC Class Codes: B41J 2/14427 Structure of ink jet print heads with thermal bend detached actuators
• CPC Class Codes: B41J 2/1623 bonding and adhesion
• CPC Class Codes: B41J 2/1626 etching
• CPC Class Codes: B41J 2/1628 dry etching
• CPC Class Codes: B41J 2/1629 wet etching
• CPC Class Codes: B41J 2/1631 photolithography
• CPC Class Codes: B41J 2/1632 machining
• CPC Class Codes: B41J 2/1635 : dividing the wafer into individual chips
• CPC Class Codes: B41J 2/1639 : sacrificial molding
• CPC Class Codes: B41J 2/1642 : thin film formation by CVD [chemical vapor deposition]
• CPC Class Codes: B41J 2/1646 : thin film formation by sputtering
• CPC Class Codes: B41J 2/1648 : Production of print heads with thermal bend detached actuators
• CPC Class Codes: B41J 2002/14419 : Manifold
• CPC Class Codes: B41J 2002/14491 : Electrical connection
• CPC Class Codes: Y10T 29/49345 : Catalytic device making

Abstract

An inkjet printhead comprises a plurality of sets of inkjet nozzles. Each nozzle comprises a nozzle head from which ink can be ejected and an ink ejection actuator tail extending from the nozzle head. Each set comprises a first row of the nozzle heads and a second row of the nozzle heads with the ink ejection actuator tails being located between the rows.

Claims

1. An inkjet printhead comprising:

a substrate; and

a plurality of sets of inkjet nozzle assemblies positioned on the substrate, each nozzle assembly comprising a nozzle chamber structure from which ink can be ejected and an elongate ink ejection actuator extending from the nozzle chamber structure, each set comprising a first row of the nozzle chamber structures and a second row of the nozzle chamber structures with the ink ejection actuators being located between consecutive sets, wherein the sets are serially arranged across the substrate, and wherein adjacent rows of nozzles from adjacent sets collectively define an ink ejection pod, and wherein the printhead comprises a plurality of groups of pods with each group comprising pods serially arranged in a respective line.

2. An inkjet printhead as claimed in claim 1, wherein the ink ejection actuators are arranged to be parallel to each other.

3. An inkjet printhead as claimed in claim 2, wherein each pair of adjacent ink ejection actuators extend from corresponding nozzle chamber structures of consecutive rows of respective sets.

4. An inkjet printhead as claimed in claim 1, wherein the nozzles in the first row are configured to eject a first type of ink and the nozzles in the second row are configured to eject a second type of ink.

5. An inkjet printhead as claimed in claim 1, wherein adjacent pods in each group are offset with respect to each other so that each line is staggered.