| 摘要 |
1,175,919. Lubricating tubular casings. KALLE A.G. 20 Nov., 1968 [22 Nov., 1967], No. 55053/68. Heading B5B. [Also in Division B2] The interior surface of a regenerated cellulose tube, for use as a sausage casing, having an initial water content of more than 20%, is coated with a physiologically acceptable lubricant the the tube is then dried to a water content of 14 to 20% by weight while retaining the lubricant prior to shirring. Suitable lubricants include liquid paraffin and oily or solid natural and synthetic fatty acid glycerides. A more uniform coating is obtained when the coating is effected with a solution of the lubricant in a readily volatile solvent such as methylene chloride which evaporates during the drying process. As shown, the upper leading end of the extruded tube is fed manually from delivery container 1 at the start of the operation around a guide roller 8 in a flattened state and led downwards and passed around a second guide roller 2. Lubricant is advantageously introduced into the open leading end of the tube after it has been led around roller 2 and before it has been passed between the first pair of nip rollers 3. Between guide roller 8 and nip rollers 3 the portion of the tube not containing lubricant 10 is filled with air which enters when the lead end of the tube is introduced into the apparatus. After passing nip rollers 3 and being deflected by guide roller 9 the tube is passed through a drying chamber 5 between two pairs of nip rollers 4 and 6. When the lead end of the tube has been passed between nip rollers 6 the latter are opened and air is introduced into the tube so that after the nip rollers 6 have been closed the tube remains inflated during the drying process. The dried tube is wound on reel 7 and can then be fed into a shirring machine. |
