Sealing film whose tearing guide is formed by laser processing, and toner container using the same
US6188421A · kind A · utility
5Cited by
6References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1996 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Sep 10, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/069
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The toner supplying opening of a toner container for storing powder toner or the like used in image-forming apparatuses such as copying machine or the like is sealed with a laminated lid material film. This sealing film comprises a base layer having tearing directionality, a guide layer having tearing guide portions formed by laser processing and a laser barrier layer provided between the base layer and the guide layer for shielding laser beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.