Device for charging a screw lodged in a housing and method...

Agitating – Rubber or heavy plastic working – With specified feed means

Reexamination Certificate

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Details

C366S154100, C366S155200, C366S157100, C366S294000, C366S295000

Reexamination Certificate

active

07404665

ABSTRACT:
An apparatus for filling a screw (7) bearingly supported within a housing (6), in particular of an extruder, for processing of pre-comminuted synthetic plastics material, in particular PET, has a filling opening (5) for the screw housing (6). This filling opening (5) is in flow connection with the lower outflow opening (4) of an upright receptacle81) for the material to be processed. Within the receptacle (1), tools (30, 31) circulate around a preferably vertical axis, and they act on the material positioned within the receptacle (1). This material is introduced into the evacuable receptacle (1) through a sluice (60). A quickly circulating tool (30) for creating a mixing cone (71) is disposed between an upper interior portion (68) and a lower interior portion (69) of the receptacle (1). Within the lower interior portion (69) that constitutes a dwell space for the heated plastics material that has reached it for thermal homogenization thereof, also circulating tools (31) are disposed, which, however, are mere mixing tools without substantial introduction of power, so that within this dwell space an agglomeration of the plastics material is avoided.

REFERENCES:
patent: 3602394 (1971-08-01), McCune
patent: 3669416 (1972-06-01), Sutter et al.
patent: 4390285 (1983-06-01), Durr et al.
patent: 4403868 (1983-09-01), Kupka
patent: 4610124 (1986-09-01), Watanabe et al.
patent: 5217800 (1993-06-01), Pentecost
patent: 5609831 (1997-03-01), Kempter
patent: 6357905 (2002-03-01), Birchard
patent: 0749818 (1996-12-01), None
patent: 03260187 (1991-11-01), None
patent: WO 00/64654 (2000-11-01), None
patent: WO 01/39948 (2001-06-01), None

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