Apparatus and method for making inflated articles
US11667451B2 · kind B2 · utility
0Cited by
47References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2021 |
| Grant date | Jun 6, 2023 |
| Priority date | — |
| Expiry date | Jul 19, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31D2205/0052
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A sealing device generally includes a rotatable support cylinder having an outer, circumferential surface and a heating element disposed about such surface and secured thereto such that the heating element rotates therewith. The heating element is coiled about the outer surface of the cylinder in the form of an overlapping helical pattern. Juxtaposed film plies may be sealed together by bringing the sealing device into rotational contact with the juxtaposed film plies and heating the heating element to a temperature sufficient to cause the film plies to seal together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.