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US 4,818,460 AGranted
Roller forming of thermoplastic sheet material
AssigneeGeneral Electric Company
InventorHerman F. Nied
Life of this patent
Estimating the term…
Abstract
A method of roller forming thermoplastic sheet material to form large parts includes providing a form having a surface of predetermined curvature. A sheet of thermoplastic material is overlain on the form surface and heated until pliable. Pressure is provided on the thermoplastic sheet using a roller so that the sheet conforms to the shape of the form.
Claims13
A method of forming thermoplastic contoured parts, comprising the steps of:
- providing a form including a surface of predetermined curvature which varies in height along both the length and width of the form;
- providing a sheet of thermoplastic material;
- overlying the surface of said form with the thermoplastic sheet;
- heating the entire thermoplastic sheet;
- and
- providing pressure on said thermoplastic sheet using a pliable roller so that said thermoplastic sheet conforms to take the shape of the form.
3 more elements
A method of forming thermoplastic parts comprising the steps of:
- providing a metal form including a surface of predetermined curvature which varies in height along both the length and width of the form;
- providing a substantially flat sheet of thermoplastic material having predetermined size and shape approximately equal to that of the form surface;
- overlying said surface of said metal form with said thermoplastic sheet;
- clamping a first end of said thermoplastic sheet to said metal form for preventing slippage therefrom;
- heating the entire thermoplastic sheet;
- and
- providing pressure on said thermoplastic sheet using a pliable roller moved in a direction substantially perpendicular to said sheet first end so that said sheet conforms to the form surface.
4 more elements
Dependencies are inferred from the claim text.