Coating apparatus and method therefor

Claim 1

AN APPARATUS FOR LINING THE OUTSIDE WALL OF A CONDUIT COMPRISING MEANS DEFINING A CHAMBER ADAPTED TO BE POSITIONED AROUND SAID CONDUIT AND IN SPACED RELATIONSHIP TO SAID OUTSIDE CONDUIT WALL, MEANS TO VARY THE VOLUME OF SAID CHAMBER, A CIRCUMFERENTIAL PASSAGEWAY CONNECTED WITH SAID CHAMBER AND CONTAINING A PLURALITY OF ORIFICES IN A WALL ADAPTED TO BE DISPOSED ADJACENT SAID OUTER CONDUIT WALL, A CIRCUMFERENTIAL SEAL CONNECTED TO THE SAID ORIFICE CONTAINING WALL AND ADAPTED TO CONTACT SAID OUTER CONDUIT WALL TO DETERMINE THE THICKNESS OF THE LINING APPLIED TO SAID CONDUIT, SAID SEAL CONTAINING VENTS TO PERMIT VENTING OF AIR AS SAID LINING IS APPLIED, TROWEL MEANS DISPOSED ADJACENT SAID PASSAGEWAY AND SAID CONDUIT WALL, AND MEANS FOR VARYING THE POSITON OF SAID TROWEL MEANS.

Claim 2

A METHOD OF LINING A WALL OF A CONDUIT WITH A LINING MATERIAL COMPRISING THE STEPS OF POSITIONING A CHAMBER CONTAINING LINING MATERIAL IN SPACED RELATIONSHIP TO SAID CONDUIT WALL, EXUDING LINING MATERIAL FROM SAID CHAMBER THROUGH A PLURALITY OF ORIFICES ONTO SAID CONDUIT WALL TO A PREDETERMINED THICKNESS WHILE MOVING SAID CHAMBER IN A DIRECTION AT RIGHT ANGLES TO THE EXUDATION SAID THICKNESS BEING DETERMINED BY SEAL MEANS POSITIONED BETWEEN SAID CONDUIT WALL AND SAID CHAMBER, VENTING AIR THROUGH SAID SEAL MEANS DURING SAID EXUDATION STEP, AND SIMULTANEOUSLY SMOOTHING THE SURFACE OF THE EXUDED MATERIAL BY THE APPLICATION OF A FORCE THERETO, THE FORCE EXERTED ON THE LINING MATERIAL TO SMOOTH IT BEING INDEPENDENT OF THE FORCE WHICH EXUDES THE LINING MATERIAL FROM THE CHAMBER.