Method and apparatus for sealing cartons
US4894104A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Nov 29, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1051
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for sealing cartons by sticking together facing surfaces of a hinged flap and a wall of each carton by means of a solvent-based, preferably water-based, adhesive, in which the cartons are continuously moved along a line past an adhesive applicator which applies a deposit of adhesive to the under surface of the flap, first pressure rollers arranged to bring the flap surface temporarily into contact with the side wall to transfer some of the adhesive to it and to thin out and spread the adhesive on the flap, a hot air nozzle which enters within the acute angle formed between the two surfaces when the flap is released from the first pressure rollers and which directs hot air onto the surfaces to effect partial drying of the adhesive, and a second set of pressure rollers to press the flap against the side wall to effect final sealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.