Process for making packaging materials
US6035611A · kind A · utility
28Cited by
13References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Nov 20, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B2160/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process of manufacturing webs of side connected bags is disclosed. A tube of heat sealable material is flattened and spaced, transverse seals are formed from one edge of the tube toward the other to delineate bag sides. Thereafter, the seals are bisected by lines of weakness to facilitate separation of sides of adjacent bags. Longitudinal lines of weakness are formed immediately adjacent the seals to delineate the tops of bag faces and backs and a separate top or lip section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.