Method for preparing a pulp molded cup lid with buckles without overlapping curves on both surfaces
US9765484B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 8, 2016 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Jul 8, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W90/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for preparing a pulp molded cup lid with buckles without overlapping curves on both surfaces, comprising: diluting plant fiber into pulp and placing it into a forming mold with a filter screen to form a paper embryo through vacuum adsorption; assembling the forming mold with a transfer mold under no pressure for vacuumization to obtain a paper embryo; transferring the paper embryo into a heat setting mold without mesh screen and assembling the mold under no pressure to obtain a cup lid body with stiffening ribs; then stamping into a finished cup lid. The cup lid has smooth internal and external surfaces without overlapping curves and no paper fiber dissolved out at the places where the internal surface and the liquid contact and the suction port and the labial part of the user contact; buckles improves the strength of the cup lid and the leakproofness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.