Heater for a corrugating machine
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United States of America Patent
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-
Oct 20, 1992
Grant Date -
N/A
app pub date -
May 24, 1990
filing date -
May 24, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A paper corrugating machine is disclosed which includes a heater for preheating the medium prior to the corrugation. The heater includes a curved metal plate where channels are drilled through end faces of the plate. Slots are provided at the end faces of the plate to interconnect pairs of adjacent channels at alternate ends to form a serpentine steam passage through the plate. End caps are welded over the slots to seal the communication between the adjacent interconnected pair of channels. Steam supply ports extend into the serpentine path to steam pressurize the serpentine passage. The heater is placed in a single facer corrugating apparatus above the upper and lower corrugating rolls. A variable wrap mechanism is also disclosed which varies the angle of wrap between the medium paper and the heater.
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