Method of forming an ink-resistant seal between a printhead asse

Details Method of forming an ink-resistant seal between a printhead asse Method of forming an ink-resistant seal between a printhead asse

1997-06-23

1999-07-20

Young, Lee W.

Metal working

Method of mechanical manufacture

Fluid pattern dispersing device making, e.g., ink jet

B41J 216

Patent

active

059241985

ABSTRACT:
A method of attaching an ink-jet printhead assembly to the headland region of an ink-jet pen cartridge to form a leak-proof seal without the use of any externally applied adhesive material. The cartridge includes a frame structure fabricated of a rigid plastic frame member formed of a first plastic material and a polymeric second material molded to the frame member. A headland region is defined at the tip of a snout region of the cartridge. An ink reservoir is connected through a standpipe defined by the rigid frame material with the headland region. The second plastic material defines a printhead assembly support structure which circumscribes a printhead and the stand-pipe. The printhead assembly is attached to the support structure after alignment by heatstaking the printhead assembly to the second plastic material defining the support structure. For an edge-fed printhead secured to a back surface of a flexible polymer tape, the support structure is a racetrack extending from a surface of the headland region, to which the back surface of the tape is heat staked. For a center-fed printhead die, the support structure is a pedestal surrounding the standpipe, to which the die is bonded by melting and reflowing the pedestal material.

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