Apparatus for regulating the operation of a plant for the making

Details Apparatus for regulating the operation of a plant for the making Apparatus for regulating the operation of a plant for the making

1986-11-25

1988-07-05

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Control means responsive to product weight or dimension

250339, 264 402, 264 404, 356 51, 425145, B29C 4792

Patent

active

047551275

ABSTRACT:
The apparatus has a measuring head (34) for contact-free optical monitoring of a swelling (A) of material immediately behind the extruder nozzle (22) or a pileup (32) of material ahead of the calibrating tool (26) of the plant. The measuring head (34) has spaced-apart confronting light emitting and light receiving surfaces (52) and (54). Each of these surfaces is adjacent the ends of a plurality of light conducting elements which extend to a housing (38) for a light sender and a light detector. The light receiving surface (54) is subdivided into a plurality of fields (1-13). A first signal identifies at least one field (2-13) which is located at the level of one edge of the extruded product in the region of the swelling or pileup. A second signal denotes the position of the edge within such field (2-13). A single compensation field (1) serves to ascertain a reference value of the intensity of light.

REFERENCES:
patent: 3531827 (1970-10-01), Dragonette
patent: 3813200 (1974-05-01), Gergely
patent: 3989779 (1976-11-01), Brunnhofer
patent: 4022557 (1977-05-01), Johnson
patent: 4087499 (1978-05-01), Bayonnet
patent: 4208126 (1980-06-01), Cheo et al.
patent: 4325897 (1982-04-01), Zerle et al.
patent: 4363966 (1982-12-01), Cheo
patent: 4402656 (1983-09-01), Schott, Jr.

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