Heavy duty spool
US5203516A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1991 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Jul 16, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/5112
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Heavy duty spools having the capacity to hold at least about 375 to 675 pounds of product, such as between about 2,800 and about 3,000 unfilled plastic or paper bags which are sized to hold disposable diapers, are disclosed. The heavy duty spools of the instant invention are preferably fabricated from paperboard materials and include two flange plates connected by a hollow outer core. The hollow outer core is formed from a plurality of corrugated interlocks, each having locking arms on the ends thereof. The flange plates have central openings and a plurality of anchoring slots spaced around the central openings. The anchoring slots extend radially from and intersect the central openings and cooperate with the locking arms of the hollow outer core to anchor the hollow outer core snugly against the flange plates. Interlocks, when assembled into the hollow outer core, form unique ribs which lend support to the hollow outer core. Inserted inside the hollow outer core and through the central openings is a hollow inner core preferably formed of solid paper wrap. The inserted hollow inner core abuts the ribs inside the hollow outer core and lends further support to the hollow outer core t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.