Flexible hose for a vacuum cleaner and fabricating method thereof

Abstract

Disclosed is a flexible hose for a vacuum cleaner and a fabricating method thereof. The fabrication method includes the steps of: extruding a primary extrusion molding band 13 having a larger size than a size of a finished state while embedding an electric wire 1 in the primary extrusion molding band 13 at a first extruder 12 ; molding a multi-extrusion molding band 10 in the size of the finished state at a sizing mold 14 ; and winding the multi-extrusion molding band 10 at a predetermined angle at a bonder and bonding a bonding portion 2 of the electric embedding portion 3 with a bonding end 4 of the semicircular portions 5 positioned on both sides of the multi-extrusion molding band 10 by using adhesive 8.

1 . A flexible hose for a vacuum cleaner, comprising two or three long extrusion molding bands ( 7 ) having cross-sections each including a rectangular electric embedding portion ( 3 ) having an embedded electric wire ( 1 ) and a bonding portion ( 2 ), a semicircular portion ( 5 ) having a bonding end at an end thereof, and a connecter connecting the electric embedding portion ( 3 ) and a semicircular portion ( 5 ), wherein bonding ends ( 4 ) and the bonding portions ( 2 ) of the two or three long extrusion molding bands ( 7 ) are bonded through adhesive, the extrusion molding bands ( 7 ) are wound cylindrically at a predetermined angle, and the bonding end ( 4 ) of the extrusion connected at a bonding portion ( 2 ) by adhesive, 
 wherein one multi-extrusion molding band ( 10 ), which is integrally molded such that two or more semicircular portions ( 5 ) and two or more electric wire embedding portions ( 3 ) are connected to each other through the connectors ( 6 ) as viewed in a cross-section, is wound cylindrically at a predetermined angle and the bonding end ( 4 ) at one side and a bonding portion ( 2 ) at the other side are bonded.    
   
   
       2 . The flexible hose of  claim 1 , wherein an expansion hole ( 11 ) is formed at a portion where the semicircular portion ( 5 ) and an electric wire embedding portion ( 3 ) are connected to each other.  
   
   
       3 . A flexible hose for a vacuum cleaner, comprising: 
 an integrally molded extrusion having three-dimensional features extending uniformly longitudinally down the extrusion, the three-dimensional features being repeated at least once in the extrusion in a direction perpendicular to the longitudinal direction,    the extrusion being wound cylindrically at a predetermined angle to provide a bond between a bonding end on one side of the extrusion and a bonding portion on the other side of the extrusion to form the flexible hose.    
   
   
       4 . The flexible hose of  claim 3 , wherein the three-dimensional features include a wire embedding portion.  
   
   
       5 . The flexible hose of  claim 3 , wherein the three-dimensional features include semicircular shapes.  
   
   
       6 . The flexible hose of  claim 3 , wherein an expansion hole is formed longitudinally down the extrusion between ate least two of the three-dimensional features.