Stretching apparatus
AssigneeThe Japan Steel Works, Ltd.
InventorsKenichiro YAGI, Taiji MINAMOTO
Life of this patent
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Abstract
A stretching apparatus includes a heat treatment unit 12 configured to perform a heat treatment to a film 8 to be stretched. The heat treatment unit 12 includes a chamber 31, an air supply unit 32 configured to supply air into the chamber 31, an exhaust unit 33 configured to exhaust air from the chamber 31, a pressure measuring unit 34 configured to measure a pressure inside the chamber 31, and a control unit 35. The exhaust unit 33 has an exhaust port 51 provided in the chamber 31 and an exhaust blower 54 capable of exhausting air through the exhaust port 51. The control unit 35 controls the pressure inside the chamber 31 by adjusting an air volume of the exhaust blower 54 based on the pressure measured by the pressure measuring unit 34.
Claims21
A stretching apparatus of a thermoplastic resin film comprising:
- a conveying device configured to convey and stretch the thermoplastic resin film;
- and
- a heat treatment unit configured to perform a heat treatment to the thermoplastic resin film,
- wherein the heat treatment unit includes:
- a chamber configured to cover the conveying device;
- an air supply unit configured to supply air into the chamber;
- an exhaust unit configured to exhaust air from the chamber;
- a pressure measuring unit configured to measure a pressure inside the chamber;
- and
- a control unit,
- wherein the exhaust unit has an exhaust port provided in the chamber and an exhaust blower capable of exhausting air through the exhaust port, and
- wherein the control unit controls the pressure inside the chamber by adjusting an air volume of the exhaust blower based on the pressure measured by the pressure measuring unit.
A stretching apparatus of a thermoplastic resin film comprising:
- a conveying device configured to convey and stretch the thermoplastic resin film;
- and
- a heat treatment unit configured to perform a heat treatment to the thermoplastic resin film,
- wherein the heat treatment unit includes:
- a chamber configured to cover the conveying device;
- an air supply unit configured to supply air into the chamber;
- an exhaust unit configured to exhaust air from the chamber;
- a temperature measuring unit configured to measure a temperature inside the chamber;
- and
- a control unit,
- wherein the exhaust unit has an exhaust port provided in the chamber and an exhaust blower capable of exhausting air through the exhaust port, and
- wherein the control unit controls the temperature inside the chamber by adjusting an air volume of the exhaust blower based on the temperature measured by the temperature measuring unit.
Dependencies are inferred from the claim text.