Electric heating – Heating devices – With heater-unit housing – casing – or support means
Reexamination Certificate
2006-04-25
2006-04-25
Campbell, Thor S. (Department: 3742)
Electric heating
Heating devices
With heater-unit housing, casing, or support means
C392S480000
Reexamination Certificate
active
07034258
ABSTRACT:
A heater device used for mold injection processes and related method for manufacturing the same is disclosed. The heater device comprises an inner sleeve having a hollow tubular body with opposed flanges formed at either end thereof and a resistive element applied around the body of the inner sleeve. In assembly, the inner sleeve is disposed inside and engaged to an outer sleeve having a hollow tubular body with opposed openings that communicate with a cavity defined between the inner and outer sleeves. The outer sleeve further defines a first aperture for permitting connection of terminal leads to the resistive element inside the outer sleeve during manufacturing. During manufacture, a slurry of ceramic insulation material is injected through a second aperture in order to completely fill the cavity and encase the resistive element.
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Campbell Thor S.
Harness & Dickey & Pierce P.L.C.
Watlow Electric Manufacturing Company
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