Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – Pivotally joined housings or housing sections enclosing...
Reexamination Certificate
1999-03-26
2001-06-12
Nguyen, Nam (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
Pivotally joined housings or housing sections enclosing...
C425S19200R, C425S197000, C425S198000
Reexamination Certificate
active
06244849
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a die assembly used for extruding thermoplastic materials.
In the extrusion of thermoplastic materials, a die head is typically attached to the output end of an extruder barrel by bolts. To clean or change such die heads, or to remove screws from the extruder barrel, the die head must be unbolted from the end of the extruder and all bolts, thermocouples, and electrical connections attached to the die head disconnected, all of which entails a great deal of labor and down time.
SUMMARY OF THE INVENTION
It is an object of this invention to provide a die assembly which is easy to clean, does not require disconnection of attachment bolts or electrical and thermocouple connections, and allows screws to be removed from the extruder barrel without removing the die.
It is a further object of this invention to provide a die head having a die plate that can be removed without removing fasteners.
The die assembly of the present invention comprises a die head which is pivotally attached to the output end of an extruder barrel, the die head being locked into place and unlocked by slidable clamping means.
REFERENCES:
patent: 2078100 (1937-04-01), Royle
patent: 2449625 (1948-09-01), Stuart, II
patent: 3108326 (1963-10-01), Thiel
patent: 3632279 (1972-01-01), Christy et al.
patent: 5221541 (1993-06-01), Arbour et al.
patent: 5762975 (1998-06-01), Rockstedt
Bailey Albert J.
Cafferata Samwood M.
Hanawalt Kirk R.
Ronkin Martin A.
Entek Manufacturing Inc.
Howard Robert E.
Leyson Joseph
Nguyen Nam
LandOfFree
Extruder die assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Extruder die assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extruder die assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2494709