B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
18/732
B29B 1/06 (1980.01)
Patent
CA 1060619
ABSTRACT OF THE DISCLOSURE A heating device having a screw rotatable within a barrel therefor, such as a part of an extruder, especially constructed to circulate and heat a granular or particulate work load of fusible material while still in its particulate condition. The essential purpose is to heat the material to a uniform temperature just under plasticization in preparation for entering melting apparatus, such as a downstream melting section of an extruder. The screw has a core and a main thread defining a main channel in which the portions of the core surface extending side-by-side longitudinally of the channel deviate from an average core diameter throughout the length of the heating device to circulate the work load transversely of the channel and to heat the work load while in a granular condition.
253847
Gasior Joseph
Pomper Anthony W.
LandOfFree
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