Film holder for bite-wing radiographs
US4057732A · kind A · utility
14Cited by
5References
3Claims
0Family size
Inventor
Key dates
| Filing date | Feb 4, 1976 |
| Grant date | Nov 8, 1977 |
| Priority date | — |
| Expiry date | Feb 4, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/512
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to a film holder for bite-wing X-ray films with a centering device for the X-ray cone comprising an indicator rod portion extending parallel to a central guide axis of the holder and provided for guiding the X-ray cone and an index projection indicating the horizontal medial axis of the X-ray film and its end indicating the central axis. The film holder is preferably made of plastics material to be used once, providing maximum hygiene, whereas the indicator rod is provided with fracture means, the holder thus being adaptable for all types of X-ray cones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.