Pagewidth inkjet printhead incorporating power and data transmission circuitry

• US 7,338,147 B2
• Filed: 08/24/2005
• Issued: 03/04/2008
• 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): Luu; Matthew
• Assistant Examiner(s): Seo; Justin
• Application Number:
  US11/209,712
• Publication Number:
  US 20060017772A1
• Time in Patent Office: 923 Days
• Field of Search: None
• US Class Current: 347/42
• CPC Class Codes: B41J 15/044 Cassettes or cartridges containing continuous copy material, tape, for setting into printing devices
• CPC Class Codes: B41J 2/04506 aiming at correcting manufacturing tolerances
• 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 2/04565 detecting heater resistance
• CPC Class Codes: B41J 2/0457 Power supply level being detected or varied
• CPC Class Codes: B41J 2/04571 detecting viscosity
• CPC Class Codes: B41J 2/04573 Timing; Delays
• 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 2/14427 Structure of ink jet print heads with thermal bend detached actuators
• CPC Class Codes: B41J 2/155 for line printing
• 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 2/1631 : photolithography
• CPC Class Codes: B41J 2/1632 : machining
• CPC Class Codes: B41J 2/1634 : laser machining
• CPC Class Codes: B41J 2/1635 : dividing the wafer into individual chips
• CPC Class Codes: B41J 2/1637 : molding
• 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 2/175 : Ink supply systems ; Circuit parts therefor
• CPC Class Codes: B41J 2/17563 : Ink filters
• CPC Class Codes: B41J 2002/14362 : Assembling elements of heads
• CPC Class Codes: B41J 2002/14419 : Manifold
• CPC Class Codes: B41J 2002/14491 : Electrical connection
• CPC Class Codes: B41J 2202/19 : Assembling head units
• CPC Class Codes: B41J 3/445 : Printers integrated in other types of apparatus, e.g. printers integrated in cameras
• CPC Class Codes: Y10T 29/49401 : Fluid pattern dispersing device making, e.g., ink jet

Abstract

A pagewidth inkjet printhead includes an elongate ink distribution assembly connectable to an ink supply. A printhead chip is mounted on the ink distribution assembly to receive ink from the ink distribution assembly. A cover is fast with the ink distribution assembly. Power and data transmission circuitry is interposed between the cover and the ink distribution assembly and connected to the printhead chip to provide the printhead chip with power and data signals.

Claims

1. A pagewidth inkjet printhead which comprises

an elongate ink distribution assembly connectable to an ink supply;

a printhead chip that is mounted on the ink distribution assembly to receive ink from the ink distribution assembly;

a cover fast with the ink distribution assembly; and

power and data transmission circuitry interposed between the cover and the ink distribution assembly and connected to the printhead chip to provide the printhead chip with power and data signals.

2. A pagewidth inkjet printhead as claimed in claim 1, in which the ink distribution assembly comprises an ink distribution manifold that defines an aperture to accommodate the printhead chip and a plurality of slots that open into the aperture.

3. A pagewidth inkjet printhead as claimed in claim 1, in which the power and data transmission circuitry includes a pair of busbars and a tape automated bonding (TAB) strip interconnecting the busbars and the printhead chip.

4. A pagewidth inkjet printhead as claimed in claim 3, in which the busbars and the housing have complementary locating formations that engage each other to position the busbars correctly with respect to the housing.