Method for wrapping products in very low contact pressure applications
US5175978A · kind A · utility
8Cited by
13References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1991 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Dec 9, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B51/10
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A wrapper paper for pressure sensitive products bearing on one of its flat surfaces a layer of polyethylene and on the opposite of its flat surfaces a layer of a primer selected from the polyalkyleneimine class, at least portions of the opposite flat coated surfaces facing one another in overlapping relationship when the paper is wrapped about a product, the overlying areas of the wrapper paper being sealed to one another by heat means and the application of very low pressure to the overlapping portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.