Molded paper body with minimal wrinkling and forming method thereof
US10518925B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 2, 2012 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Mar 25, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1303
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The objective of the present invention is to provide a molded paper body in which the outer peripheral portion of a blank primarily of paper is formed in a raised shape using draw processing, wherein the molded paper body eliminates the occurrence of wrinkles causing leaking or instability of adhesion when used as the bottom member of a paper cup or similar paper container and a forming method thereof. The method for manufacturing this molded paper body is to draw-process, with a punch and die, a single blank primarily of paper, and is characterized by use of a holding mechanism to press the outer peripheral portion of the blank between a wrinkle pressing member and the die upper surface, and setting the force applied by the wrinkle pressing member within an appropriate range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.