Carton closing and sealing apparatus
US4037370A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1975 |
| Grant date | Jul 26, 1977 |
| Priority date | — |
| Expiry date | Nov 3, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B43/46
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus for sealing liquid-tight a liquid filled carton, having at its open end a cover attached to the body of the carton so as to be pressed down upon and adhesively secured to sealing flaps attached to the body of the carton at its open end, has a conveyor for bringing filled cartons into registry with carton sealing assemblies each of which includes a pair of pivotally mounted arms for firmly clasping the carton in substantially complete contacting encompassment over a portion of its length immediately below the open top, and also includes a pivotally mounted plate for pushing the cover down into contact with the sealing flaps. The paperboard of which the carton is formed is preferably coated with polyethylene, and after the carton has been firmly clasped it is transported by the conveyor past a heat source which melts the polyethylene on the areas that are to be sealed together. Immediately after the heating of the polyethylene the pivotally mounted plate clamps down upon the carton cover pressing it firmly into engagement with the sealing flaps. The carton is next transported through a cooling duct, the cover remaining clamped down by the pivoted plate. When the carton e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.