Method and apparatus for controlling welding temperature of wrapping material
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United States of America Patent
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Oct 1, 2002
Grant Date -
N/A
app pub date -
May 8, 2001
filing date -
Aug 2, 1999
priority date (Note) -
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Abstract
A hammer (14) coupled to an ultrasonic vibrator (15) is actuated to apply vibrations to a wrapping material (10) with irregularities in composition and thickness so that the wrapping material (10) can be fusion-bonded with uniform strength. The surface temperature of the wrapping material (10) measured by an infrared sensor (30) is sent to a control unit (22), and a controller (23) sends a control signal (24) to a variable-voltage source (25). The variable-voltage source (25) controls the amplitude of vibrations of the hammer (14) by temperature feedback to make uniform the generation of heat in the wrapping material (10).
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