Process for sealing a housing for a multi-lamp photoflash unit.

摘要

A multi-lamp photoflash unit includes a plastic housing member (5) having a back portion (7) with a plurality of cavities (11), a reflector (35) nested therein and a multiplicity of flashlamps (45) located in the cavities. A front portion of the housing member folds over and is bonded by a knurled seal to the back portion. In the process, the front (9) and back (7) portions of the plastic housing member are positioned intermediate knurled head members (51, 53) which are energized to effect the desired knurled seal.