Patent · US Expired

Method and apparatus for sealing cardboard containers

US4379008A · kind A · utility

76Cited by

8References

3Claims

0Family size

Assignee

AB Akerlund & Rausing · SE

Inventors

Helmut Gross · Hofheim, DE
Hermann Hauck · Hochheim, DE

Key dates

Filing date	Nov 3, 1980
Grant date	Apr 5, 1983
Priority date	—
Expiry date	Nov 3, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/1153
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A method and apparatus for sealing plastic or synthetic coated sealing surfaces of cardboard containers to each other is disclosed. One feature of the invention resides in preheating (by 15) of at least one (48) of the plastic or synthetic layers and then sealing (station 16) by the simultaneous application of heat and pressure. Another feature of the invention resides in the fact that the pressure is applied at spaced intervals (by 40) and in such a manner that one (47) of the plastic or synthetic sealing layers remains with the top of the box upon removal thereof. A container sealed in such a manner is also taught.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.