Device for judging an unexposed frame of a film
US5727240A · kind A · utility
15Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1996 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Jun 6, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B31/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A judging device for judging an unexposed frame of a film having a magnetic recording portion recordable with a magnetic signal, includes: a magnetic header for scanning the magnetic recording portion; a divider for dividing the magnetic recording portion into a plurality of blocks; a first judger for judging whether blocks bear a magnetic signal block by block; and a second judger for judging whether the frame corresponding to the magnetic recording portion has been exposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.