Separating device for bonded cine film and method therefor
US10444630B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2019 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Jan 25, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1928
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A separating device and method for a bonded cine film, belonging to the field of image file protection and repair technologies. The separating device comprises a pressurizing device, a separating device and a liquid nitrogen storage device. The pressurizing device is connected to the liquid nitrogen storage device; the liquid nitrogen storage device is connected to the separating device for providing liquid nitrogen thereto; the separating device comprises a film receiving chamber for accommodating a film to be separated; the pressurizing device pressurizes the liquid nitrogen storage device allowing liquid nitrogen to enter the film receiving chamber. Due to a difference between expansion coefficients of a base layer and emulsion layer of the film under low temperature, micro-pores and gaps may be generated in the base layer and the emulsion layer of a bonded film roll; the liquid nitrogen penetrates into the micro-pores and gaps of the bonded film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.