METHOD OF PRODUCING ARTICLES WITH IMPERMEABLE THERMOPLASTIC COATING AND DEVICE FOR ITS IMPLEMENTING

摘要

A method and apparatus are disclosed for making a molded pulp product such as a plate or the like which has an upper liquid impervious layer integrally secured thereon. The pulp product is formed on a foraminous mold and, together with the mold, is heated to the softening temperature of a liquid impervious thermoplastic sheet material which is caused to be cut to size by engagement with a cutting edge on the mold whereafter the severed portion is drawn by suction and bonded to a selected surface area of the pulp product.