Zigzag heating device with downward directed connecting portions

Details Zigzag heating device with downward directed connecting portions Zigzag heating device with downward directed connecting portions

1995-09-07

1997-12-23

Leung, Philip H.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

338279, 338280, 427592, H05B 302, H05B 300, H01C 300

Patent

active

057009929

ABSTRACT:
A heating device has a plurality of strip heating portions separated by a plurality of slits. The strip heating portions are connected to one another by connecting portions, thereby forming a heating surface in which a zigzag current path extends. The connecting portions in which uneven-temperature regions exist are bent so as not to be positioned in the same plane as the heating surface, thereby making the heating surface, to be opposed to an object to be heated, to have a uniform temperature.

REFERENCES:
patent: 497795 (1893-05-01), Jenkins
patent: 2042233 (1936-05-01), Lockwood
patent: 3573429 (1971-04-01), Brodbeck et al.
patent: 4410796 (1983-10-01), Wilsey
patent: 4503319 (1985-03-01), Moritoki et al.
patent: 4748315 (1988-05-01), Takahashi et al.

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