Plug member for use in coating an interior surface of a pipe

Details Plug member for use in coating an interior surface of a pipe Plug member for use in coating an interior surface of a pipe

1992-11-19

1994-07-05

Roberts, Edward L.

Coating apparatus

Solid member or material acting on coating after application

Inside of hollow work

15104061, 427235, B08B 904

Patent

active

053264002

ABSTRACT:
There is disclosed a method for coating an interior surface of an elongated pipe member. The method uses a first plug member having a resilient cylindrical body with an outer diameter close to an inner diameter of the pipe member, and a second plug member having a cylindrical body of an outer diameter smaller than the inner diameter of the pipe member and a brush provided at an end portion of the body of the second plug member, the brush having radially outwardly extending fibers having radial outer ends defining a cylindrical surface of which diameter is close to the diameter of the pipe member. The method comprises steps of inserting the first plug member into the pipe member, supplying a coating material into the pipe member and then inserting the second plug member into the pipe member with the brush being directed rearward, applying a propulsion force to the rearward end of the second plug member to thereby propel the second plug member in the pipe member and the first plug member, the coating material being applied to the interior surface of the pipe member while the plug members are proceeded in the pipe members.

REFERENCES:
patent: 4825498 (1989-05-01), Rankin
patent: 5127125 (1992-07-01), Skibowski

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