Title:
STRUCTURE FOR OPENING CURL PART OF BOTTLE-TYPE CAN
Document Type and Number:
WIPO Patent Application WO/2023/166810
Kind Code:
A1
Abstract:
Provided is a structure for an opening curl part of a bottle-type can with little loss of tamper-evidence due to excellent shape retention against loads from above. A curl part 10 has an inner peripheral wall part 16, upper end rounded part 17, outer peripheral wall part 20, lower end rounded part 21, folding piece part 22, and tip edge part 23, is provided with an inclined wall part 15 that connects to a screw part downward from the inner peripheral wall part 16 and that has an outer diameter that gradually increases on the lower side, extends downward from a lowermost end portion 25 where the folding piece part 22 contacts a portion connecting the inner peripheral wall part 16 to the inclined wall part 15, and is provided with a retracting surface 24 that has a cross-sectional curvature radius R2 greater than the curvature radius R1 of the lower end rounded part 21 when cut by a plane that has a center of curvature P2 outside the mouth and neck part and that passes through the central axis line O of the mouth and neck part.
More Like This:
Inventors:
ENOKI YASUSHI (JP)
Application Number:
PCT/JP2022/045621
Publication Date:
September 07, 2023
Filing Date:
December 12, 2022
Export Citation:
Assignee:
DAIWA CAN CO LTD (JP)
International Classes:
B21D51/38; B65D1/02; B65D8/02
Foreign References:
| JP2013082488A | 2013-05-09 | |||
| JP2004026306A | 2004-01-29 | |||
| JP2005022663A | 2005-01-27 | |||
| JP2019177932A | 2019-10-17 | |||
| JP2004224417A | 2004-08-12 |
Attorney, Agent or Firm:
WATANABE, Takeo et al. (JP)
Download PDF: