Seam sealing device and technique
US4437853A · kind A · utility
9Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1981 |
| Grant date | Mar 20, 1984 |
| Priority date | — |
| Expiry date | Aug 19, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B9/20
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The present invention includes a heating element which is secured to a rigid member and which is located so that when a plastic like material is being formed into a package or bag, by effecting a seam along the side of the package, the inside of said side seam will be heated, in addition to said outside of said side seam to help provide a better sealed seam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.