| 摘要 |
A thin walled, light-weight, relatively flexible, molded plastic package has first and second re-entrant recesses respectively at opposite sides of the package, the package stiffened against crushing. The package includes: (a) the first re-entrant recess at one side of the package containing sufficient of a predetermined quantity of an expanded synthetic resin as to substantially fill said recess, and (b) the expanded resin cured to form a hardened re-inforcing core in said first re-entrant recess and integrally with the package to stiffen same against crushing, whereby an article or articles placed in the second re-entrant recess at the opposite side of the package are protected against crushing.
|
