Drum in dryer and method for fabricating the same

Details Drum in dryer and method for fabricating the same Drum in dryer and method for fabricating the same

2008-03-11

2008-03-11

Rinehart, Kenneth (Department: 3749)

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

Reexamination Certificate

active

07340849

ABSTRACT:
Drum in a laundry dryer, and method for fabricating the same, wherein the drum in a dryer including a steel layer which forms a base, anti-corrosive metal film on the steel layer, and an organic film on the metal film, and the method includes the steps of providing a metal sheet having a steel layer, a metal film thereon, and an organic film thereon, rolling the metal sheet into a cylinder, and welding abut joining parts, to form a cylindrical drum, reducing diameters of opposite ends of the cylindrical drum, forming beads in a middle portion of the cylindrical drum except the reduced diameter portions, and hemming opposite edges of the cylindrical drum of the reduced diameter portions, to fold the opposite edges, respectively, thereby reducing production cost significantly, preventing easy visibility of dents in an inside circumferential surface of the drum with naked eyes different from the related art, preventing occurrence of rust, and improving bonding strength of the felt which is a sealing material.

REFERENCES:
patent: 1645971 (1927-10-01), Riegel
patent: 6465114 (2002-10-01), Honda et al.

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