Stock rolls containing a first folded film within a second folded film and methods of making the same
US10167165B2 · kind B2 · utility
2Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2014 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Mar 16, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/1864
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Methods for forming a stock roll including a folded film within another folded film include combining the films and winding them into the stock roll. In particular, one or more implementations of a method of forming a stock roll involve combining films on an extrusion tower. Thus, implementations of the present invention can greatly reduce costs and space requirements, while allowing a single stock roll to feed a bag-making machine in order to produce bag-in-bag structures. One or more implementations further include stock rolls including a first folded film within another folded film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.