Electric heating – Metal heating – Of cylinders
Patent
1990-10-31
1992-08-11
Leung, Philip J.
Electric heating
Metal heating
Of cylinders
219 1075, 219 1079, H05B 644
Patent
active
051381230
ABSTRACT:
An inductively operated heating apparatus for plastic materials in extruders or like machines has a steel housing with one or more passages for the material to be heated and two groups of laminated E-shaped iron cores which are magnetically coupled to the housing to establish a magnetic field. The legs of the cores extend toward the housing and the apparatus further comprises insulators which are interposed between the housing and several legs of each core. Each group of cores is assembled with a substantially V-shaped clamping device into a module, and the two modules are held together by coupling means which cause the resilient clamping devices to store energy and to bias the legs of the cores in the respective groups against the adjacent insulators which bear against the housing. The two clamping devices and the two groups of cores are mirror images of each other.
REFERENCES:
patent: 3663782 (1972-05-01), Emerson
patent: 3739131 (1973-06-01), Reinke
patent: 3965321 (1976-06-01), Brinkmann et al.
patent: 4145591 (1979-03-01), Takeda
patent: 4281234 (1981-07-01), Dohogne
patent: 4300031 (1981-11-01), Reboux et al.
patent: 5003145 (1991-03-01), Nolle et al.
BLUM GmbH
Kontler Peter K.
Leung Philip J.
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