Method of making double wrap package
US3999357A · kind A · utility
17Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Apr 21, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2571/00024
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A film of heat shrinkable plastic material is wrapped about four sides of an object and heat welded. A second heat shrinkable film is wrapped and heat welded about the object at right angles to the wrap of the first film. Both films are wider than the package faces about which they are wrapped. The films are heated to shrink both films and to cause the overlapping portions of the two films to heat bond together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.