| 摘要 |
A composite printhead supporting structure for a pagewidth printhead assembly is provided. The assembly has a plurality of similar or identical printhead modules (2) disposed along its length. The structure comprises a composite beam elongated in the direction of the printhead and is at least as long as the printhead. The beam is formed from odd number of uninterrupted layers (3, 4, and 5), there being a pair of outer layers (3, 4) of equal thickness symmetrically disposed about and laminated to a core. The coefficient of thermal expansion of the core (5) and the outer layers provides a coefficient of expansion, in the beam as a whole, substantially equal to that of the modules. The modules are preferably formed from a silicon substrate.
|
