Patent · US Active

Device for roll-sealing sheets

US9233523B2 · kind B2 · utility

0Cited by

0References

14Claims

0Family size

Assignee

UHLMANN PAC-SYSTEME GMBH & CO. KG · DE

Inventors

Detlev Gertitschke · Laupheim, DE
Juergen Liebhardt · Laupheim, DE
Robert Lehmann · Leipzig, DE

Key dates

Filing date	May 1, 2013
Grant date	Jan 12, 2016
Priority date	—
Expiry date	Mar 19, 2034

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C66/93
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The device for sealing together a formed bottom sheet and a lidding sheet between a feed roll and a sealing roll has a heating unit for preheating the lidding sheet before the sealing operation. The heating unit is a contactless induction heating device which has coils and magnetic-field influencing elements which are arranged transversely to the travel direction of the lidding sheet and opposite at least one of the coils. The distance between each of the magnetic-field influencing elements and the at least one coil is adjusted by a control unit on the basis of measurement values of temperature sensors arranged downstream of the magnetic-field influencing elements in order to regulate the temperature profile of the lidding sheet.

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