Method for producing decorated bottle caps with improved mechanical strength
US7832075B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2006 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Jul 3, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4998
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method comprising: a) providing sheet or format metal; b) swaging said metal by means of a swaging lubricant, so as to form a swaged blank; c) degreasing said swaged blank, so as to typically remove the remains of the swaging lubricant, to form a degreased blank capable of being lacquer coated; d) lacquer coating said degreased blank, said resulting lacquer coated blank being then optionally decorated; e) an optional finishing step. The method is characterized in that during the degreasing at step c), said swaged blank is subjected to an energetic radiation emission treatment of selected intensity and duration to eliminate or decompose said remains of lubricant, said treatment being wholly carried out at a metal temperature less than 150 degree C., and for a duration typically less than 1 second, so as to obtain, following said treatment, a surface tension not less than 34 dynes/cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.