Intraoral dental radiographic film packet with injection molded comfort-enhancing edge bead
US6612740B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2000 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Mar 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C3/003
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An intraoral x-ray film packet is taught which has an outer envelope wherein one of the two opposing outer sheets is more rigid than the other such that it has a tensile modulus of at least about 700 Kg/cm2. This is preferably accomplished by making both sheets from a thermoplastic material such as PVC and reducing the amount of plasticizer in the more rigid of the two sheets to less than 30%. A continuous perimetric seal is formed affixing the two outer sheets together and forming a perimetric laminated edge which is substantially coplanar with the more rigid of the two sheets. A film chip resides between the two outer sheets. A comfort-enhancing perimetric edge bead is injection molded directly onto the perimetric laminated edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.