Filled polystyrene tear back container lids
US7845514B2 · kind B2 · utility
24Cited by
104References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2007 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Aug 16, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2543/00842
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention relates to tear-back thermoformed high impact polystyrene lids having from at least 10% to about 15% of filler and the specified configuration of the tear-back portion. In particular, the tear back lid comprises a tear back portion defined by two sets of tear back indentations and a left and a right notch cut into a skirt defined by the outer diameter of the lid. The combination of the filler amount and tear-back configuration allows an improved tearability for the filled polystyrene lids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.