A bead string (1) includes a thread element (2) and multiple beads (3) firmly attached to the thread element (2); each bead (3) containing one or a plurality of inner layer (31) and one or a plurality of first outer layer (32); both of the inner layer (31) and the first outer layer (32) of the bead (3) being molded by respectively injecting two different types of plastic material into a first cavity and a second cavity; one or a plurality of thread element (2) passing through the first cavity; the second cavity accommodating the thread element (2) and the inner layer (31) of bead (3); and the first outer layer (32) tightly covering up entire portion or a certain portion of the inner layer (31) to correct defectives of a finished product found with the prior art while significantly simplifying manufacturing process and saving time and cost.
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Published patent application
Disclosure date: 06-11-2007
Publication date: 12-24-2008
Applicant: NI HAU IND CO LTD, TW
Inventor: SHANG YU SU, TW
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