Invention Grant
US5725979A Method and implementing sub-assemblies and assembly to flatten
photographic film during picture-taking
失效
在拍摄过程中方法和实现子组件和组装以使照相胶片变平
- Patent Title: Method and implementing sub-assemblies and assembly to flatten photographic film during picture-taking
- Patent Title (中): 在拍摄过程中方法和实现子组件和组装以使照相胶片变平
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Application No.: US487302Application Date: 1995-06-07
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Publication No.: US5725979APublication Date: 1998-03-10
- Inventor: Harry Julich
- Applicant: Harry Julich
- Assignee: Julich; Harry
- Current Assignee: Julich; Harry
- Main IPC: G03B1/48
- IPC: G03B1/48 ; G03B19/10 ; G03B17/00 ; G03B17/26 ; G03B17/28 ; G03C3/00
Abstract:
A method and apparatus for flattening photographic film at the time of picture-taking involves applying a force-field to a photographic film made responsive to said force field to attract it against a reference surface. The force field may be electric, magnetic, AC, DC, or a combination of these.
Public/Granted literature
- US5115327A Gain control circuit for use in shading compensation circuit Public/Granted day:1992-05-19
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