Abstract: A method for forming a spigot on a double-walled pipe and spigots formed by this method are described. The outer wall and an intermediate space of a double-walled pipe is removed from one end of the pipe over the desired chamfer length, and a preformed annular resilient bevel is placed around the remaining inner wall. This method is convenient, requires limited materials and tools, provides easy access to a porous intermediate space for sealing, and does not introduce residual stress to the spigot. Furthermore, the properties of the spigot depend primarily upon the properties of the annular resilient bevel, increasing the probability of achieving a high quality and robust seal.

Abstract: An oven for food comprises a housing and a stationary support inside the housing with a position for supporting the food. A fan and an electric element supply a stream of hot air to the inside of the housing. A rotating drum has a supply opening for directing the stream of hot air towards the position for the food and for moving the stream of hot air about the position for the food to heat or cook the food.

Abstract: An oven for food comprises a housing and a stationary support inside the housing with a position for supporting the food. A fan and an electric element supply a stream of hot air to the inside of the housing. A rotating drum has a supply opening for directing the stream of hot air towards the position for the food and for moving the stream of hot air about the position for the food to heat or cook the food.