Plastic article or earthenware shaping or treating: apparatus – With indicator – signal – recorder – illuminator – or inspection...
Patent
1991-03-15
1992-04-21
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
With indicator, signal, recorder, illuminator, or inspection...
425183, 425186, 425190, 425194, B29C 4732
Patent
active
051062879
ABSTRACT:
A mouthpiece discriminating device for a rotary roll extruder serves to distinguish different kinds of exchangeable mouthpieces from one another without relying upon visual inspection. The device includes a plurality of magnets embedded in the mouthpiece along its edge and aligned with each other in a direction of passage for the mouthpiece. The poles of the magnets are arranged as coded information uniquely determined in accordance with kind of the mouthpiece. A detector element provided along the passage detects the magnetic fields of the magnets upon movement of the mouthpiece along the passage. A signal processing unit discriminates the kind of the mouthpiece based on output signals of the detector element representing the magnetic fields detected.
REFERENCES:
patent: 3103006 (1963-09-01), Anthony
patent: 4518338 (1985-05-01), Hehl
patent: 4911631 (1990-03-01), Harada et al.
patent: 4950145 (1990-08-01), Zanetos et al.
Bridgestone Corporation
Heitbrink Tim
Mackey James P.
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