To provide a pilfer-proof cap, the bridge part of which is not broken at forming an easy break part and provide a molding apparatus for the pilfer-proof cap.
A recess 17c toward the thickness direction of the periphery wall part 12 is formed at a slit part 17a of the cap 10 and the recess 17c is encircled by a pair of long sides 17a, 17a extended in the periphery direction of the periphery wall part 12 and a pair of short sides 17b, 17b extended in the axis direction of the periphery wall part 12. The bottom wall face 17e and the short side 17b of the recess 17c are continuously connected by an axis direction side wall face 17h sloping from the opening side toward the bottom wall face 17e of the recess 17c and the radius of curvature R1 of the base end part 17g, where the bottom wall face 17e and the axis direction side wall face 17h meet, is 0.1 mm to 0.5 mm and also the base end part 17g and the periphery wall part 12 connected to the long side 17a at the opening end side are jointed with a recess curved surface having a radius of curvature R2 of 0.1 mm to 0.8 mm.
COPYRIGHT: (C)2007,JPO&INPIT
Fujiwara Yasushi
Eiji Yamamoto
| JP7089562A | ||||
| JP6135449A |
| US4217989 | ||||
| WO2004076306A1 |
Masakazu Aoyama
Tetsuo Yamazaki