Seal wire heat control system
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United States of America Patent
Stats
-
Jun 14, 1994
Grant Date -
N/A
app pub date -
Jun 2, 1993
filing date -
Jun 2, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A seal wire heat control system adapted to record in memory the immediate history of the operation of the seal wire and to adjust the time duration of the application of voltage to the seal wire in accordance with a predetermined program. The application of heat is controlled according to the running history of the machine. At start up, a relatively long pulse of power is sent through the wire to make a seal for a predetermined number of times. When the count is reached, an intermediate pulse is provided to the wire for a predetermined number of times. When this count is reached, a short pulse is provided to the wire. A reset timer monitors idle time. If no seal is executed after a predetermined time, the entire system, including counters, resets to prepare for delivery of a long pulse to the wire. A safety timer is also provided for limiting the duration of power to the wire within the wire's safety threshold value.
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