초록

Shipping container and storage cartons for printed circuit boards, are composed entirely of paper board coated on inside surfaces with conductive carbon black particles to prevent an outside static electricity charge from passing through the container or carton.

대표청구항 ▼

An inexpensive but effective carbon black circumvallate trap for static electricity originating outside the trap so that goods inside the trap, which may be ruined by a discharge of static electricity, are protected by the carbon black circumvallate, said trap comprising: a paper board box having on

An inexpensive but effective carbon black circumvallate trap for static electricity originating outside the trap so that goods inside the trap, which may be ruined by a discharge of static electricity, are protected by the carbon black circumvallate, said trap comprising: a paper board box having on the bottom wall and four side walls a carbon black facing layer deposited from a liquid dispersion on the side facing the interior of the box, a partitioner means inserted into the box, opposed surfaces of said partitioner means respectively facing one of said sides also being faced with a carbon black layer deposited from a liquid dispersion, the opposed surfaces of the partitioner means and each of said walls being characterized in that at least the interior thereof is not penetrated by the carbon black so deposited, so that the interior of the box is divided into individual cells each having at least a five-sided circumvallate of carbon black.