Multistep transverse welding process for producing bags from plastic sheets
US3983794A · kind A · utility
9Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1974 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Oct 17, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B2160/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process and a device for producing bags from a strip of thermoplastic material wherein mated layers of foil strip are supplied to serially arranged bonding devices to provide bonded seams extending over the width of the layers at specific intervals corresponding to the width of the bags with said bonding devices being alternated with cooling means to lower the temperature of the bonded areas and thereafter advancing the material to a cutting device designed to separate the bags divided by the bonded seams from the chain of bags produced by the bonding operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.