Abstract: Cellulose casing for sausages, comprising at least three concentric layers of regenerated cellulose, of which the two layers in contact with the outside, that is, those with the greatest and smallest diameter respectively are made of colorless, transparent viscose, and in which the internal layer or layers are made of regenerated cellulose to which is added other substances such as pigments, fumes, flavor extracts, spices or plastic proteins. The object of the invention is a manufacturing method for the cellulose casing obtained by extrusion of at least three concentric layers of regenerated cellulose. Also object of the invention is the circular viscose extrusion head used in manufacturing the cellulose casing for sausages.

Abstract: The invention seeks to obtain a collagen film with improved extensibility characteristics, preventing or diminishing the structural rigidity of collagen films of this kind. This purpose is achieved by providing such collagen with an oily additive, such as oils or fats, thereby rendering such films suitable to be used in ham stuffing machines. This beneficial effect is obtained when the addition of oily additives lies between 1 and 60% of the collagen contents measured as a dry extract of the film.

Abstract: Such has discontinuous areas soaked in a proofing substance, preferably polyvinylidene chloride (PVDC) which is impermeable to both gases and liquids, and thereby on establishing areas representing a logotype, a text, an anagram or any other design with said proofing substance, when the cellulose casing is later filled with the meat emulsion, and the same is smoked or colored through the cellulose casing, the proofing substance will provide a barrier to such later soaking thereby for the smoke or coloring to cross only those areas of the cellulose casing which have not been treated with the proofing substance, that are then colored, providing a background upon which "printed devices" appear that are formally, dimensionally and positionally coincident with those existing on the cellulose casing, when the casing is finally removed, such "printed devices" being duly established upon the sausage proper.