Two-ply resin capsule for mining roof bolting systems
US4227612A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1979 |
| Grant date | Oct 14, 1980 |
| Priority date | — |
| Expiry date | Jun 19, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B13/143
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A multi-compartment capsule having a longitudinally extending tubular inner compartment for containing a catalyst and a longitudinally extending tubular outer compartment around the inner compartment for containing a resin composition. The container is formed of two-ply film strip material in which at least one ply is of thermoplastic material. The two-ply strip material is made up of two portions overlapped and welded together along a longitudinally extending edge with the thermoplastic material sides facing each other and forming the weld. One edge of the two-ply strip is folded upon itself along one edge to bring the thermoplastic material ply into contact and welded to form the inner compartment. The other strip edge is folded over the inner compartment to bring the thermoplastic material ply of such other edge into contact with the thermoplastic ply and welded to form the longitudinally extending outer compartment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.