Markers for dental x-ray film and packets for simplified film mounting
US5166967A · kind A · utility
Inventor
Key dates
| Filing date | Mar 6, 1991 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Mar 6, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C11/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A radiographic film packet is adapted to be placed in a patient's mouth for exposing a sheet of dental film to x-rays generated by an x-ray tube. The packet includes a light-proof and moisture resistant envelope having a first side and a second side defining a pocket for receiving the film sheet. Disposed within the pocket are a sheet of lead and a sheet of film, the lead sheet being located adjacent the second side and the film sheet being located between the lead sheet and the first side. An indicator affixed to the first side expressly designates the edge of the film packet appointed to be uppermost in the mouth during radiographic exposure. A film marker is affixed to said film sheet along a periphery and proximate a corner thereof. The film marker has a constant orientation relative to the indicator, and identifies the orientation of the film sheet during exposure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.