Apparatus and method for manufacturing spiral duct

Details Apparatus and method for manufacturing spiral duct Apparatus and method for manufacturing spiral duct

2007-03-28

2010-06-08

Ross, Dana (Department: 3725)

Metal deforming

By tool-couple pressing together adjacent surface portions...

To form helically-seamed tube

C072S129000, C072S168000

Reexamination Certificate

active

07730754

ABSTRACT:
Provided are an apparatus and method for manufacturing a spiral duct in which straight connection parts are integrally formed with both ends of a curved duct. Further provided are an apparatus and method for manufacturing a spiral duct capable of improving cutting quality of a metal band and precisely and securely coupling bent parts of edges of the metal band. The apparatus comprises a cutting roll to cut a metal band into two parts, the cutting roll having a horizontal rotation angle that can be varied to cut along a straight or a waved line in order to form a duct having straight and curved parts, and in order to adjust a diameter of the duct. In addition, the apparatus includes rolls for forming bent parts at edges of the cut metal bands, and for winding and seaming edges of the metal bands to form ducts.

REFERENCES:
patent: 4287742 (1981-09-01), Heiman
patent: 5014424 (1991-05-01), Takasugi
patent: 645 288 (1984-09-01), None
patent: 645288 (1984-09-01), None
patent: 0 400 576 (1990-12-01), None
patent: 59-215215 (1984-12-01), None
patent: 950003300 (1995-04-01), None

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