Photographic mask structure
US4132480A · kind A · utility
Inventor
Key dates
| Filing date | Jul 5, 1977 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Jul 5, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/582
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photograhic cropping mask of a planar sheet, such as paper, plastic or cardboard, having defined therein a plurality of prescored, detachable rectilinear openings having a common center, indexing means and, optionally, an area of adhesive material and/or crop marks such that the sheet may be placed adjacent a transparent film to determine the cropping opening appropriate to the film image, the selected opening produced by detaching along an appropriate score line, the film attached by means of tape or the optional adhesive area to the sheet with the film properly aligned with the opening, and the film and sheet then accurately positioned in a photographic printing apparatus by the indexing means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.