Core chuck
US6367733B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Feb 24, 1999 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Feb 24, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H75/246
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A core chuck has a generally spool-shaped mandrel with an outer surface configured to define three longitudinally extending lobes. A set of three or more arcuate friction plates surround the lobular outer surface of the mandrel and are movably held in place with elastic bands. Each friction plate has an inner surface contoured to conform to the shape of a corresponding lobe of the mandrel and an outer surface for frictionally engaging the inside surface of a core. The outer surfaces of the friction plates align to form a cylindrical shell. The friction plates are circumferentially slidable around the mandrel between first or retracted positions wherein the plates rest on their respective lobes and form a shell of a first diameter and second or expanded positions wherein the friction plates span adjacent lobes and form a shell of a second diameter greater than the first diameter. In use, a core chuck is inserted in each end of the hollow core of a roll of material and a shaft is inserted through and secured to the chucks. Relative rotational movement between the roll and the chucks in either direction causes the friction plates to slide toward their second positions, expanding outwa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.