US 8,989,565 B2 · Multistage furnace

Abstract

The invention provides a compact multistage furnace of which the installation area in a factory is decreased. A multistage furnace is configured by piling up a plurality of furnace units in the vertical direction. Each of the furnace units includes an upper heater and a lower heater layered in the vertical direction and holding a heat insulator therebetween, a support pipe disposed on one end of the upper heater and extending in the horizontal direction, a support pipe disposed on other end of the upper heater and extending in the horizontal direction, and a plurality of work support bars mounted over the support pipes. The back surface of a work supported by the work support bars is opposed to the upper heater and the front surface of the work is opposed to the lower heater of the adjacent furnace unit disposed above.

Claims6

Dependent claims

A multistage furnace comprising a plurality of furnace units piled up in a vertical direction,

the furnace units each comprising:
an upper heater and a lower heater that have a shape of a plate and are layered in the vertical direction, the plate having a first edge and a second edge opposite from the first edge;
a first support pipe disposed on and extending along the first edge;
a second support pipe disposed on and extending along the second edge;
and
a plurality of work support bars disposed over the first and second support pipes and configured to support a work,
wherein the upper heater of one of the furnace units is configured to heat a back surface of the work supported by the work support bars, and the lower heater of a furnace unit that is placed on the one of the furnace units is configured to heat a front surface of the work supported by the work support bars.

4 more elements

Dependencies are inferred from the claim text.

Multistage furnace

Life of this patent

Multistage furnace

Life of this patent

Abstract

Claims6