Method and apparatus for copying semi-transparent originals using a black backing member
US5053818A · kind A · utility
10Cited by
10References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1990 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Dec 19, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4095
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for copying relatively thin documents of semitransparent or thin stock which permit images on the reverse side to show through to other portions of the copy apparatus. A sensing system is employed to sense the density of the document and otherwise determine that background images may show through. The copier may automatically produce a black sheet for backing on the thin or semitransparent stock and the original copy using the copy lighter feature to eliminate the uniform gray background which would otherwise be produced. This can be done automatically or on command by the operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.