Process and mould for thermoforming containers
US7797912B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2001 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Dec 26, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1352
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method of manufacturing water-soluble containers using a horizontal intermittent motion thermoforming machine comprising locating a first water-soluble film over a mould containing a plurality of pocket forming cavities in a 2-dimensional array, each cavity being surrounded by a planar surface of the mould on all sides in which the shortest dimension of the planar surface between two adjacent cavities is at least 3 mm and between an edge of the mould and the closest cavity is at least 1.5 mm, thermoforming a first film to produce a plurality of pockets, at least partially filling the pockets with a composition and sealing the plurality of the at least partially filled pockets. The cavities are positioned in the array such that there are a plurality of continuous strips of uninterrupted planar surface of the mould from a leading to a trailing edge of the mould, for receiving support means fitted to the machine for supporting the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.