# US 2013/0152382 A1 · Method for making wave-shaped heating unit

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- Number: US 2013/0152382 A1
- Document ID: US20130152382A1
- Status: Published application
- Kind: A1
- Application number: 13/717,712
- Filed: 2012-12-18
- Published: 2013-06-20
- Earliest claimed: 2011-12-20
- Inventors: SHU-LIEN CHEN
- Web page: https://patentgrep.com/patent/US20130152382A1

## CPC

- B23P 15/26: heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)}
- H01C 1/024: the housing or enclosure being hermetically sealed (H01C1/028, H01C1/032, H01C1/034 take precedence)
- H01C 17/02: adapted for manufacturing resistors with envelope or housing (apparatus or processes for filling or compressing insulating material in heating element tubes H05B3/52)
- H05B 3/26: heating conductor mounted on insulating base {(for transparent areas H05B3/84, H05B3/86)}
- H05B 2203/017: Manufacturing methods or apparatus for heaters
- Y10T 29/49083: Heater type
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)
- H01C: RESISTORS
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method for making a wave-shaped heating unit and includes a step of preparing a housing by compressing a metal tube to form an elongate tube with an oval cross section; a step of inserting a heating plate by inserting a soft heating plate into the housing, and two respective first ends of two wires connected to the heating plate; a step of clamping by compressing the elongate tube to clamp the heating plate within the housing, two respective second ends of the two wires extending beyond the housing, and a step of forming wave-shape by bending the housing into continuous convex portions and concaved portions.

## Claims

### Claim 1

A method for making a wave-shaped heating unit, comprising:
a step of preparing a housing: preparing metal tube and compressing the metal tube so as to form an elongate tube with an oval cross section;
a step of inserting a heating plate: inserting a soft heating plate into the housing, two respective first ends of two wires connected to the heating plate;
a step of clamping: compressing along a short axis of the elongate tube to clamp the heating plate within the housing, two respective second ends of the two wires extending beyond the housing, and
a step of forming wave-shaped: bending the housing to be wave-shaped, bending one end of the housing into a convex portion, a concaved portion being bent and connected to the convex portion, repeating the bending actions to form multiple alternative convex portions and concaved portions.

### Claim 2 (depends on 1)

The method as claimed in claim 1 further comprising a step of sealing which seals two ends of the heating unit by two sealed portions.

### Claim 3 (depends on 1)

The method as claimed in claim 1, wherein the heating plate comprises a soft circuit plate and a circuit which is located on the circuit plate, the circuit is formed by conductive material and has two contact points at two ends thereof, the circuit is electrically connected to the wires by the contact points.