"Injection moulding process for soles in expansible and cross-linking ""Eva"" b"
US5868981A · kind A · utility
23Cited by
11References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Feb 26, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/712
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention concerns an injection moulding process for soles in expansible and cross-linking "EVA" based compounds characterised in that during the cooling stage of the moulded sole the spontaneous shrinkage of the same is arrested by means of a template consisting of a rigid shaped plate placed on the sole so that its edge connects with a perimeter edge realised specifically on the upper surface of the sole, whose dimensions reduce no further either during the remaining cooling phase of after cooling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.