Title:
METHOD AND DEVICE FOR DETECTING UNDESIRABLE MATERIAL IN CULLET
Document Type and Number:
Japanese Patent JPS63165791
Kind Code:
A
Abstract:
An apparatus and a method for inspecting cullet (2) for the presence of unwanted materials among the pieces of glass. A light source such as a laser (11) directs light onto the cullet (2). At least one array of at least two light detectors (8) is positioned to delete reflected light from the cullet (2). The detectors (8) differentiate between non-uniformly scattered light from the cullet (2) and generally uniformly scattered light from the debris. Signalling means are provided to signal the differentiation thereby to indicate the presence of debris in the cullet (2) under inspection. When cullet (2) is present on a moving cullet belt (1), light from the light source (8) is intermittently scanned over the cullet (2) in a raster-type scan. A multi-faceted rotatable mirror (12) may be employed intermittently to reflect light onto the cullet (2).
Inventors:
BARII REIMONDO HIRU
DEBITSUTO MIRAA RINGU
DEBITSUTO MIRAA RINGU
Application Number:
JP24243287A
Publication Date:
July 09, 1988
Filing Date:
September 26, 1987
Export Citation:
Assignee:
PILKINGTON BROTHERS PLC
International Classes:
G01V8/12; B07C5/342; G01N21/89; G01N21/84; (IPC1-7): G01V9/04
Attorney, Agent or Firm:
Akihide Sugimura (1 outside)