Film package having a pouch and leader with different coefficients of friction
US5197090A · kind A · utility
4Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Dec 6, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C3/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A package for a stack of film sheets has a pouch that is sealed around the stack of sheets and a leader that is secured to the pouch and engageable with a spindle in a magazine so that rotation of the spindle can pull the pouch from around the stack of sheets. The pouch and leader are formed of different polyolefin materials with the pouch comprising a material having a low coefficient of friction to enable the pouch to be easily pulled around the stack of sheets while the leader comprises a material having a high coefficient of friction to facilitate engagement with the spindle and pulling the pouch uniformly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.