Method for the preferential heating of a hollow body comprising a marking step
US11090856B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2017 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Feb 24, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7158
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a method for the preferential heating of a thermoplastic hollow body having at least one portion to be heated and another to be superheated, the portion that is to be superheated initially having a radiation absorption coefficient substantially identical to that of the portion to be heated. The method includes, in succession: a first step of marking the portions of the hollow body that are to be superheated, during which step isolated marks are made in the thickness of the wall of the portion that is to be superheated so as to increase its absorption coefficient; a second step of preferential heating of the hollow body by uniform exposure of the portions that are to be heated and of the portions that are to be superheated to the heating electromagnetic radiation. Also disclosed is a preform marked in accordance with the first step of the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.