Apparatus and mandrel-assisted method for forming a plastic pipe socket containing a restrained gasket

A method of making a plastic pipe with a bell socket comprising:

• heating a plastic pipe,
• adhering a removable protective cover directly to an interior surface portion of a restraining gasket, wherein the restraining gasket includes at least one toothed-restraint having a pointed tooth extending radially inward from the interior surface portion of the restraining gasket,
• arranging the restraining gasket with the removable protective cover adhered thereto and a Rieber gasket adjacent to one another on a mandrel, the removable protective cover preventing the pointed tooth from impinging into the mandrel,
• inserting the mandrel into the plastic pipe to form a bell socket in an end of the plastic pipe, the bell socket having a diameter that is greater than a diameter of a remainder of the plastic pipe and a gasket cavity formed by outer surfaces of the Rieber gasket and the restraining gasket, the gasket cavity having a diameter that is greater than a diameter of a remainder of the bell socket,
• cooling the plastic pipe, and
• withdrawing the mandrel from the plastic pipe with the removable protective cover adhered to the interior surface portion of a restraining gasket.