Disposable cup lid having a tear-resistant straw through-slit
US5397023A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1993 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Dec 6, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2231/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A straw-insertable disposable lid is disclosed including a flexible disk-like body having a top surface for covering an opening of a cup, a plurality of intersecting lines of weakness each extending between two ends with the lines of weakness being located on the body and adapted to permit the insertion of a drinking straw through the top surface of the lid and a plurality of intersecting troughs for accommodating a respective one of the intersecting lines of weakness, with the troughs acting to stop the propagation of the tearing of the lines of weakness in a radially outward direction when a straw is inserted into the lid and for closing the plurality of intersecting lines of weakness in response to a fluid pressure force acting on an underside of the top surface of the lid should a filled cup incorporating such lid be inadvertently tilted over. The aforementioned lid if formed by placing a sheet of thermo-deformable material between a male and female die set, the male die including an edge for forming the plurality of intersecting lines of weakness and the plurality of intersecting troughs in a substantially planar portion of the sheet with each trough accommodating a respective…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.