Hot-gas producing apparatus for shrinking plastic foils
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United States of America Patent
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-
Sep 11, 1984
Grant Date -
N/A
app pub date -
May 10, 1982
filing date -
May 9, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention concerns an apparatus for producing a hot gas to shrink plastic foils, with at least one burner mounted in a housing provided with a discharge nozzle for the hot gas. To better control the hot-gas temperature and hence the temperature of shrinking, the apparatus is provided with such a burner arrangement that the hot-gas jet (9 or 10) leaving the burner (7 or 8) is directed at an angle to the discharge flow defined by the discharge nozzle (6) and with a jet-deflection means for the hot-gas jet (9 or 10) before the discharge nozzle (6). In a preferred embodiment the jet deflection is implemented by a jet (17) of cold air by means of which the hot-gas jet (9 or 10) is simultaneously directed and cooled. In a preferred mode, the pressure and the flow rate of the cold-air jet (17) are controlled.
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