Chucks for a meat encasing machine that increase the holdback force on plastic casing sticks resulting in fully formed initial links. The invention also includes a method for controlling the deshirr rate of shirred plastic casing sticks inserted in a meat encasing machine to generate fully formed initial sausage links.
1. A chuck for a meat encasing machine which increases the holdback force on plastic casing comprising:
(a) an elongated body having an axial cylindrical bore to accommodate the passage through said body of a casing being stuffed which is placed over a stuffing horn, said bore defining a longitudinal axis about which said body is rotatable and having:
(i) an inlet end and an outlet end;
(ii) a casing engaging inlet section which tapers inwardly from a large diameter at said inlet to a smaller diameter at a location intermediate said inlet end and said outlet end;
(iii) a casing deforming section extending from said intermediate location to said outlet end;
(b) a multiplicity of longitudinally extending casing engaging flutes in said bore;
(c) the improvement comprising a means for reducing the inside diameter of said bore from about said intermediate location and continuing for a total distance towards the outlet end, of from about one-quarter to about one-third the length of the chuck, thereby providing a holdback force increasing zone.
2. A chuck member according to claim 1 , wherein the means for reducing the inside diameter of said bore is an inwardly tapering plastic tubular member fitted snugly against the interior flutes of said bore in said holdback force increasing zone.
3. A chuck according to claim 2 , wherein said tubular member has a smooth, uninterrupted inner and outer surface.
4. In a method for controlling the deshirr rate of a shirred plastic food casing stick situated on a stuffing horn inserted into a chuck of a meat encasing machine and stuffing said casing with food emulsion while inside said chuck, wherein the improvement comprises forcing the deshirred casing through a restrictive annular passage between the inside wall of the bore of a two-piece chuck according to claim 2 and the outside wall of the stuffing horn, thereby increasing the holdback force as the food emulsion is introduced into the casing.
5. A one-piece molded chuck for a meat encasing machine which increases the holdback force on plastic casing comprising:
(a) an elongated body having an axial cylindrical bore to accommodate the passage through said body of a casing being stuffed, said bore defining a longitudinal axis about which said body is rotatable and having:
(i) an inlet end and an outlet end;
(ii) a casing engaging inlet section which tapers inwardly from a large diameter at said inlet to a smaller diameter at a location intermediate said inlet end and said outlet end;
(iii) a casing deforming section extending from said intermediate location to said outlet end;
(b) a multiplicity of longitudinally extending casing engaging flutes in said bore;
(c) the improvement comprising eliminating said multiplicity of longitudinally extending casing engaging flutes in the holdback force increasing zone located between said intermediate location and continuing for a total distance towards the outlet end, of from about one-quarter to about one-third of the length of said chuck, and reducing the inside diameter of said bore in an inwardly tapering manner in the holdback force increasing zone.
6. A one-piece molded chuck according to claim 5 , wherein said holdback force increasing zone has a smooth uninterrupted surface.
7. In a method for controlling the deshirr rate of a shirred plastic food casing situated on a stuffing horn inserted into a chuck of a meat encasing machine and stuffing it with food emulsion while inside said chuck, wherein the improvement comprises forcing the deshirred casing through a restrictive annular passage between the inside wall of the bore of a one-piece modified chuck according to claim 5 and the outside wall of the stuffing horn, thereby increasing the holdback force as the food emulsion is introduced into the casing.