Molded fiber and plastic tubes
US6341741B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2000 |
| Grant date | Jan 29, 2002 |
| Priority date | — |
| Expiry date | Jul 24, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/534
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A payout tube for insertion in a radial hole of a wound coil of filamentary material and extending from the inner to the outer wind of the wound coil, the payout tube having entrance and exit openings in coaxial and spaced relationship with one another. The size of the entrance opening is determined by the following equation: Yc=3.5 sin×/Dm, where Dm is the diameter of the mandrel, X is the length along the circumference of the wind and Yc is the coil pattern. Yc′=3.5/Dm Cos×/Dm at x=0; Yc′=3.5/Dm, and the slope H of the coil pattern=Tan−1[3.5/Dm]=23.629 degrees. The length L of the payout hole is determined as: L=O×Dm×pie/360 degrees; where O is the payout hole opening; the width of the payout hole is W=L cos(H). The size of the exit hole is determined as being a fixed amount less than the entrance opening; and a flange member surrounds the exit opening for engaging a panel of a container retaining the wound coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.