Patent · US Expired

Heating and sealing of thermoplastic surfaces

US5678391A · kind A · utility

5Cited by

6References

14Claims

0Family size

Assignee

Elopak Systems AG · CH

Inventors

Arve Andersen · Hokksund, NO
Per Olaf Tjelflaat · Vikersund, NO
Bj.o slashed.rn Erling Vembe · Hundhammeren, NO

Key dates

Filing date	Aug 31, 1995
Grant date	Oct 21, 1997
Priority date	—
Expiry date	Aug 31, 2015

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB65B51/20
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

A hollow heating head for insertion into an open, spouted, top end closure of a carton comprises an interior chamber with slot-form outlets for hot air supplied to the chamber. The slots include a U-shaped, narrow slot, or its equivalent, extending generally horizontally around two lateral vertical walls and an end vertical wall of the head. Each limb of the U-shape includes horizontal, upper and lower sections and a vertical intermediate section. The base of the U-shape is adjacent the lower sections, is at substantially the same level as the lower sections and is of a shallow V-shape in a vertical plane. The slots also include several vertically extending slots above each of the base and the lower sections of the U-shaped slot.

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