Core plug apparatus
US5513820A · kind A · utility
13Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1993 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Nov 15, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H75/185
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A core plug apparatus includes an outer wall, an inner hub, a middle strengthening ring, and a plurality of interconnecting vanes. A vacuum seal wall covers one end of the plug to enable a vacuum lift force to be generated at one end of the roll of material. The vacuum seal wall includes a relatively thin central portion which can be displaced to allow the roll to be installed on a pair of mandrels, or to transport the roll using a rod extending from a lift device. The outer surface of the core plug may be textured to further increase frictional forces between the core plug and the inside wall of the core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.