Apparatus having a judging device whether a film frame is exposed or not
US6055382A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1997 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Jan 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/244
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus having a judging device judges whether a film frame is exposed or not by detecting that a magnetically recorded signal exists or not on a magnetic recording section arranged correspondingly on each frame of a film. The device judges, when it is judged that one frame is an unexposed frame by detecting no recorded signal on the magnetic recording section, whether a following frame is exposed or not. And, if it is judged that the following frame is also an unexposed frame, it is judged that the previous frame is not exposed. Thus, an accurate judgment of an unexposed frame and film feeding of a head frame of unexposed frames to a photographing position can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.