Patent ID: 8136246

Claim:
A method for forming an ejection hole on a drip pressure reducing hose above a discharging portion of at least one drip which is adhered to an inside of the drip pressure reducing hose and includes an introducing portion, a pressure reducing portion and a discharging portion, the method comprising: forming an upper projection having the same height as the drip and a lower projection of a lower side of the upper projection at the discharging portion of the drip; forming a protruding portion on the drip pressure reducing hose by the upper projection by adhering the drip having the upper and lower projections to the inside of the drip pressure reducing hose, and moving the lower projection upward due to a lower surface of the drip pressure reducing hose supported by the lower drawing roll when upper and lower portions of the drip pressure reducing hose overlap with each other while the passage of the drip pressure reducing hose is narrowed vertically as the drip pressure reducing hose passes between the upper and lower drawing rolls; and forming an ejection hole of the drip pressure reducing hose by horizontally cutting an upper portion of the protruding portion formed on the drip pressure reducing hose.