Patent · US Expired

Production of jackets for flexible magnetic disks, and apparatus for this purpose

US4733452A · kind A · utility

0Cited by

5References

4Claims

0Family size

Assignee

BASF SE

Inventors

Bernhard Lenz · Frankfurt, DE
Norbert Holl · Germering, DE
Dietrich Gruehn · Appenweier, DE
Kurt Zwintzscher · Kehl, DE

Key dates

Filing date	Jun 12, 1986
Grant date	Mar 29, 1988
Priority date	—
Expiry date	Jun 12, 2006

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/534
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The jacket blanks punched out from a film web are folded to give jackets and then closed by spot welding with the aid of a wavy resistance belt, the welding temperature being produced for a short time by means of a current pulse in the resistance belt.

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