Charcoal bed assembly

Details Charcoal bed assembly Charcoal bed assembly

B - Operations, Transporting

01

D

18/76

B01D 24/12 (2006.01) A62B 23/02 (2006.01) B01D 15/02 (2006.01)

Patent

CA 1292846

- 10 - CHARCOAL BED ASSEMBLY ABSTRACT OF THE DISCLOSURE A method and an apparatus are provided for securing a bed of charcoal under pressure in a plastic material housing in the manufacture of charcoal filter canisters for gas masks. The bed of particulate charcoal is placed in the housing and covered with a retainer. A compactor is placed on the retainer and loaded to produce the desired compaction of the charcoal. An ultrasonic welder is then used to secure the retainer in place for one embodiment, a spring-loaded compactor is placed on top of the retainer and an ultrasonic nodal horn is placed over the compactor. The horn presses the compac- tor against the retainer with the necessary compressing force to compress the charcoal bed, while at the same time producing an ultrasonic weld around the periphery of the housing, welding the retainer in place. The compac- tor seats on a nodal point of the horn, so that ultra- sonic vibrations are not transmitted from the horn through the compactor to the charcoal bed.

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