Patent ID: 7153461

Claim:
A method for manufacturing an adhesive tape that pattern and mark are formed thereon comprising steps of: (a) taking an upper mold and a lower mold, among which one end of the upper mold is provided with a guide groove, the center thereof being provided with a sprue, and above the upper mold adjacent to the guide groove are provided with more than one formation areas, which are connected with the guide groove by way of more than one paths, while the lower mold has more than one bearing portions corresponding to the formation areas; (b) placing a felt portion on the bearing portion of the lower mold with the felted side contacting with the bearing portion, and then placing the upper mold correspondingly on the lower mold such that the back side of the felt portion can be corresponding to the formation area on the upper mold; (c) injecting a plastic material from the sprue through the guide groove to the formation area, such that the plastic material can be formed on the back side of the felt portion to shape into a plastic board; (d) removing the upper mold such that a pattern as that on the formation area can be obtained by way of plastic formation on a plastic board; accordingly, the manufacture method for constructing an adhesive tape that pattern and mark are formed thereon; wherein a groove is provided between the formation areas of the upper mold, more than on through holes are provided on the groove provided between the formation areas of the upper mold, a groove is provided between the bearing portions of the lower mold, an aperture is provided on the groove provided between the bearing portions of the lower mold, each of the bearing portions is provided with a butting mold having pluralities of aciculae, a periphery of the lower mold along an edge of the felt portion is clipped and fastened, in order to prevent the back side of the felted surface from floating due to flash by plastic material injected by high pressure.