Each IC package carrier holds a single ZIP or SIP package between its side walls having openings to provide air flow for cooling the package and to allow heat generated within the package to dissipate. A locking strip member is provided to prevent loosening of the held package. Locking elements of snap...http://www.google.se/patents/US5644473?utm_source=gb-gplus-sharePatent US5644473 - Carriers for IC packages
