Title:
PLASTIC PISTON, PISTON ROD COMBINATION, AND ROTARY DISCHARGING CONTAINER
Document Type and Number:
WIPO Patent Application WO/2023/213143
Kind Code:
A1
Abstract:
Embodiments of the present application relate to the field of cosmetic packaging materials. Disclosed are a plastic piston, a piston rod combination, and a rotary discharging container. The plastic piston provided by the embodiments of the present application comprises a threaded part and a main body; the threaded part is arranged on the inner side of the annular main body; the threaded part is made of a first material, and the main body is made of a second material; the hardness of the first material is greater than that of the second material. Because the hardness of the threaded part is greater than the hardness of the main body, the strength between the threaded part and other engaged accessories is improved while the air tightness of the plastic piston body is ensured by a soft material, and damages of the threaded part due to overlarge assembly torsion are prevented.
Inventors:
YANG HAIYING (CN)
Application Number:
PCT/CN2023/081514
Publication Date:
November 09, 2023
Filing Date:
March 15, 2023
Export Citation:
Assignee:
SHYA HSIN PACKAGING IND CHINA CO LTD (CN)
International Classes:
A45D34/04
Foreign References:
| CN217791870U | 2022-11-15 | |||
| CN201825407U | 2011-05-11 | |||
| US20070081851A1 | 2007-04-12 | |||
| JPH08336592A | 1996-12-24 | |||
| CN213949286U | 2021-08-13 | |||
| JP2016203413A | 2016-12-08 | |||
| US20020036218A1 | 2002-03-28 |
Attorney, Agent or Firm:
KUNSHAN ZHONGJI GUOCHUANG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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