GB338011A - Improvements in and relating to processes for preserving materials of animal origin - Google Patents

Abstract

338,011. Beisser, G. July 29, 1929, [Convention date]. Preserving meat, fish, &c.-Animal carcases or parts thereof are preserved by injection of a preservative medium, e.g. freshly prepared brine, into one of the vascular tracts of the flesh under a pressure exceeding the pressure in the tract during life so that the medium diffuses out of the capillary vessels into the cellular tissue, outflow of the preservative medium being prevented by carrying out the process after rigor mortis has set in and binding or clamping any larger parts of the vascular tract which may have been opened. The process may be applied to pig and other carcases or parts thereof, fowl, fish, &c. Injection may be through the aorta into the arteries or mav be into the veins or the lymphatic ducts. In dealing with carcases, the animal is preferably bled to death by opening the aorta. When rigor mortis has set in, all arteries which were opened during preparation of the animal, e.g. in removing the viscera, are bound up or clamped, and the preservative medium injected through a nozzle into the arteries, e.g. into the aortea. The nozzle a may have an olive a' at the end inserted in the aorta b. The artery is preferably drawn out a little from the surrounding flesh, so that the piece in contact with the nozzle can subsequently be cut off to avoid infection. The injection is stopped when a suitable increase in weight is obtained. When using a brine containing 53 per cent by weight of salt, 8 per cent of sugar and 59 per cent of water, the amount of brine added is 4 per cent of the weight of the flesh. The flesh may be treated whilst on a weighing- machine. Carcases may be treated with or without the hide. A brine having a salt content of over 25‹ BeaumÚ possessing high bactericidal power can be used in the process. The pressure employed must not be greater than that at which diffusion into the cellular tissue takes place to avoid tearing the membranelike capiliaries and escape of the preserving medium. The treatment of the carcase of a pig is described. Injection processes in which the carcase is treated while still warm are referred to.