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US 5,292,463 AGranted
Variable width film die
AssigneeGeneral Electric Company
InventorWilliam C. Paul
Life of this patent
Estimating the term…
Abstract
A novel extrusion method and apparatus are disclosed for varying the width of an extruded article which employs the use of thermal pins in the extruder die body and does not involve the use of any mechanical manipulation of the die configuration.
Claims17
An extrusion die for extruding products comprising:
- an elongated die body;
- at least one inlet leading into said die body;
- means for heating said die body;
- an extruder die;
- and
- at least one means for removing heat from said die body wherein said die body comprises more than one zone, each said zone comprising at least one means for heating and at least one means for removing heat whereby, by adjusting the temperatures of the zones, the width of the extruded product may be adjusted without changing the die.
3 more elements
In an extrusion die for extruding a product comprising an elongated die body;
- at least one inlet leading into said die body;
- means for heating said die body;
- and an extruder die having fixed dimensions;
- the improvement comprising at least one means for removing heat from said die body whereby, by removing less or more heat from said die body, the width of the extruded product may be varied without changing the dimensions of the die.
1 more element
A method for varying the width of an extruded article from an extruder said method comprising extruding a thermoplastic material through an extruder having a extrusion die having fixed dimensions an elongated die body;
- at least one inlet leading into said die body;
- means for heating said die body;
- an extruder die;
- and at least one means for removing heat from said die body;
- whereby the width of the extruded article is varied by adjusting the amount of heat supplied to the extrusion die without changing the dimensions of the die.
2 more elements
Dependencies are inferred from the claim text.