Exothermic body
US4331731A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1981 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Jul 28, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249986
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides an exothermic body for use of an insole of shoes and so forth with elasticity, softness and flexibility, the exothermic heat of which is distributed uniformly along the entire area thereof. The exothermic body includes a foamed plastic sheet having cells therein, the cells being filled with an exothermic agent such as a mixture of iron, saline solution, activated carbon and woodmeal or pulp powder. The foamed plastic sheet is covered by an air-permeable thin film such as a thin perforated plastic film. A cushion material is provided on at least one surface of the foamed plastic sheet covered with the air-permeable thin film and the foamed plastic sheet together with the cushion material is covered by an air-permeable film cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.