A flexible circuit is staked to an ink-jet pen body to resist peeling from the body and to provide a flat surface to which mechanisms for enclosing the pen nozzles can be sealed. Also disclosed is a staking apparatus and method for ensuring flatness and uniform bonding of the staked circuit....http://www.google.de/patents/US5189787?utm_source=gb-gplus-sharePatent US5189787 - Attachment of a flexible circuit to an ink-jet pen
