Apparatus for making rods or tubes having a filter

Details Apparatus for making rods or tubes having a filter Apparatus for making rods or tubes having a filter

1974-05-13

1976-03-30

Annear, R. Spencer

Plastic article or earthenware shaping or treating: apparatus

Including means advancing continuous length work through...

4251311, 425205, 425377, 425404, B29D 720

Patent

active

039471691

ABSTRACT:
Apparatus for producing composite thermoplastic extrusion products comprising first and second extruder barrels communicating with one another so that the output of the first extruder barrel is directed to the input of the second extruder barrel, the output of said second extruder barrel being greater than the output of said first extruder barrel. Motor means and heating means for rotating and heating extruder barrels and hoppers for introduction of plastic materials and fillers is also provided.

REFERENCES:
patent: 2640033 (1953-05-01), Marshall
patent: 3256562 (1966-06-01), Heard, Jr.
patent: 3352952 (1967-11-01), Marr
patent: 3443278 (1969-05-01), Nauta
patent: 3453356 (1969-07-01), Kent, Jr. et al.
patent: 3467743 (1969-09-01), Otani
patent: 3609828 (1971-10-01), Compa et al.
patent: 3632702 (1972-01-01), Carrow

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