Device for drawing drawable thermoplastic resin material
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United States of America Patent
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-
Jun 18, 2002
Grant Date -
N/A
app pub date -
Aug 24, 2000
filing date -
Feb 28, 1998
priority date (Note) -
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Abstract
A drawing device for handling a wide range of drawable thermoplastic resin materials including a first pressurizing tank and first buffer tank on an upstream side, and a second pressurizing tank and second buffer tank on a downstream side are disposed along a drawing tank having pressurized steam and a discharge unit connected to it. A medium supply and discharge may be connected to each of the first and second pressurizing tanks, and the first and second buffer tanks. Opening members may be disposed on respective upstream and downstream ports along the drawing tank. Small amounts of pressurizing medium may then be allowed to flow into the drawing tank through upstream and downstream ports. Next, material may be supplied from the upstream port into the drawing tank where pressurized steam may be introduced in airtight conditions, and then drawn to the downstream port, thereby producing a drawable thermoplastic resin material.
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