Aluminum or aluminum alloy article and process
US4177299A · kind A · utility
5Cited by
22References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1978 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | Jul 12, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/0351
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An object is made out of aluminum or aluminum alloy in a form such as foil, sheet, containers and the like and has a 5 to 25 .mu.m thick oxide layer produced by anodic oxidation. This oxide layer exhibits a crack-free elongation of at least 0.65 parts per thousand in the non-sealed condition and the ratio of the crack-free elongation of the oxide in the non-sealed condition to that in the colored, non-sealed condition lies between 1:1.2 and 1:5.5. Such an object can then be colored by heat-transfer printing without producing hair-line cracks in the oxide layer, which would give the image so produced an unattractive appearance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.