| 摘要 |
Novelty: paper envelope for the collection of dust produced by a drilling device. Constitution: an adequately-shaped dust-collecting envelope 4 having the top hole 1, seamed bottom and sides 3, and the top opening 2 provided with a self-adhesive circular portion 5 assisting the adhesion of said envelope on the point to be drilled. Function: the dust collector in question is stuck via the self-adhesive portion 5 at the drilling point. The drilling device passes through the hole 1 which is peripherally pressed by the produced dust and shavings so that the opening of the envelope 2 can be sufficiently opened out to collect them. Purpose: to collect dust and shavings produced by the drilling of a hole into a wall or a concrete, metal or wooden surface; to keep the walls, houses and offices tidy and clean, free of dust and shavings spread out on the floor. |
