Patent · US Expired

Ultrasonic edge sensor for the detection of a web edge

US5803334A · kind A · utility

29Cited by

4References

11Claims

0Family size

Assignee

Erhardt & Leimer GmbH · DE

Inventors

Arvind Ishwarial Patel
Gerhard H. Alt · Waldkirch, DE
Wolfgang Krauth · Achern, DE
Hans Seibold · Bendorf, DE

Key dates

Filing date	Jan 5, 1996
Grant date	Sep 8, 1998
Priority date	—
Expiry date	Jan 5, 2016

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/106
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An edge sensor working on ultrasonic principles is used to protect the edge of a travelling web and has a plurality of sensor units with adjacent or overlapping ultrasonic measurement fields between the transmitter and receiver of each unit. The units are switched so that only one unit serves to output a receiver signal when the edge crosses over into the respective measurement field.

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