Roll winder
US4030681A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1976 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Mar 2, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S242/908
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A winder for plastic film in the absence of a winding core features equalized air lubrication of the wound roll, throughout its axial removal from the arbor. In the preferred embodiment in which a pair of aligned arbors move oppositely for stripping, means are provided for maintaining pressurized air at the roll-engaged support surfaces of both arbors until the arbors disengage the opposite ends of the roll. The winder has: restraints to hold the roll in position axially to ensure balanced air lubrication of the arbors during the stripping movement; means delivering the air adjacent the inner ends of the arbors, from which the air proceeds axially outwardly along both arbor surfaces to the ends of the roll; dependent driving of the arbors during the stripping motion; formations at the outer ends of the arbors engaged by axial drive devices; drive means receiving the end formations during indexing about a central major axis, to apply axial stripping and subsequent axial return forces to the arbors, releasing the arbors during subsequent indexing motion; axially extending flats on each of the arbors engaged by rollers in supporting and driving relation, the flats preferably extending…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.