Core for a product in sheet form wound around this core, and roll formed with such a core
US9302883B2 · kind B2 · utility
0Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2011 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | Oct 30, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A core has a cylindrical wall that can be torn axially and is made up of two superposed strips, these strips respectively being an outer strip in contact with the product and an inner strip, these strips being wound on one another and joined together by regions of attachment for example by bonding. At least one of the longitudinal edges of the inner strip is not attached or is weakly attached over a determined width in order, over at least part of its helical length, to form a free and accessible tab facing the outer strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.