Process and extruding head for the manufacture and/or coating of

Details Process and extruding head for the manufacture and/or coating of Process and extruding head for the manufacture and/or coating of

1995-09-15

1997-09-30

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Random variegated coloring during molding

By extrusion

26417117, 26417318, 264245, 425113, 425114, 4251311, 4251331, 425462, B29C 4702, B29C 4728

Patent

active

056723032

ABSTRACT:
For the extrusion of extruded profiles with a color pattern or their coating with such a color pattern, a plasticized material of at least two-colors is used, which is separated into at least two partial flows. These partial flows are combined before they exit the extruding head (1), whereby the partial flows are largely maintained. These partial flows can in turn be separated into further partial flows. The extruding head (1) is equipped with a distribution plate (4) in which distribution channels (8a, b) as well as a ring channel (11) are formed as grooves, with the ring channel connected to an the exit channel (38) through a ring slot (19, 20). The plasticized material entering through the ring slot (19, 20) into the exit channel (38) coats the pre-manufactured extruded profile (39) inserted through the guidance part (13) and the die arbor (24).

REFERENCES:
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patent: 2820249 (1958-01-01), Colombo
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Henson, Knappe and Potente, "Handbuch der Kunststoffextrusionstechnik", vol. I, pp. 375-385, vol. II pp. 20-26.
Correspondence from Walther Junius, Patent Attorney regarding Paul Troester Opposition, dated Nov. 28, 1995.
Extract of Japanese Patent Publication No. JP5-8045038 dated Mar. 16, 1983.
Extract of Japanese Patent Publication No. JP54-105157 dated Sep. 1979.

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