Patent ID: 7284676
Filing Date: 2007-10-23
Classification: B65D

Abstract:
1. A lid to cap a cup, wherein a small hole is made in a part of a ceiling board used to form the lid, and a liquid permeable filter which is made separately from the ceiling board is attached over said small hole, wherein said liquid permeable filter component is a coil spring having a series of coils through which liquid can pass, and wherein said small hole has an elongated shape with a given length in a longitudinal direction thereof, and said coil spring has a length across the series of coils which when the coil spring is uncompressed is greater than the length of the small hole, such that said coil spring is attached over said small hole by compressing the coil spring and inserting the compressed series of coils into the small hole, and said coil spring further having hooking parts extending longitudinally on opposite ends of the series of coils which overlie respective outer surfaces of the ceiling board on opposite sides of the length of the small hole so as to retain the coil spring thereon.