Process of molding a reinforced flexible belt
US4000240A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Apr 17, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C33/485
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A non-stretchable reinforcing cord is wound in a helical groove in a collapsible, cylindrical metal mandrel, and the cord is then tensioned and attached to the mandrel. The mandrel, with cord is placed in an outer mold element having a complementary cylindrical mold cavity, and a curable elastomer is injection molded into the mold space between the mandrel and cavity to mold an endless belt therebetween, and to fill the helical groove and transverse slots in the mandrel so as to form spaced parallel lugs along the inner surface of the belt, in which adjacent portions of the reinforcing cord are completely embedded, the cord being partially exposed in the spaces between lugs. The elastomer is then cured, and the mandrel collapsed to permit removal of the molded belt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.