Die for extruding sheet material
US4017240A · kind A · utility
32Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1975 |
| Grant date | Apr 12, 1977 |
| Priority date | — |
| Expiry date | Nov 19, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/85938
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Sheet extrusion of elastomeric material wherein an extruded strand is passed through a die having a symmetrical runner system which divides and subdivides said strand into multiple strands equal in length and cross section, and then gradually transforms the multiple strands into laterally adjoining flattened triangular portions in which substantially the same cross-sectional area is maintained as the cross-sectional shape changes, with alternate triangular portions overlapping the other triangular portions in staggered relation and all of said triangular portions terminating in a continuous lateral exit slot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.