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Title:
JOINT PART STRUCTURE OF SCREEN
Document Type and Number:
Japanese Patent JPH0828173
Kind Code:
A
Abstract:

PURPOSE: To prevent lowering of slit precision of a screen even by welding joint of the screen.

CONSTITUTION: Spacer rods 11 are arranged to make a row with specified intervals cylindrically with an outside diameter of a perforated pipe 1 as its inside diameter, wires 12 are spirally wound around its cylindrical outer periphery with specified pitches and ring sleeves 13 are respectively fastened on both ends of the spacer rod 11 on screen jackets 10. Deformed clearance grooves 13A are continuously formed roughly on the center in the thickness direction of the outer peripheral surfaces of the ring sleeves 13, they are welded on the perforated pipe 1 through welded parts 13B on the outside of these deformed clearance grooves 13A, and the screen jackets 10 are welded to each other.


Inventors:
NAGAOKA TADAYOSHI
Application Number:
JP18989394A
Publication Date:
January 30, 1996
Filing Date:
July 20, 1994
Export Citation:
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Assignee:
NAGAOKA KK
International Classes:
E21B43/08; (IPC1-7): E21B43/08
Attorney, Agent or Firm:
Toru Sakamoto



 
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