Gizzard harvesting machine

A method of removing the tender lining section from a gizzard along with both the food intake and digestive portions of the gastrointestinal tract naturally attached to the gizzard through the tender lining section comprising the steps of:

• placing both the food intake and digestive portions of the gastrointestinal tract still attached to the gizzard in contact with a pair of viscera removal rolls;
• rotating the viscera removal rolls so that both the food intake and digestive portions of the gastrointestinal tract are initially forced between the rolls without separating the food intake and digestive portions of the gastrointestinal tract from the gizzard whereby the food intake and digestive portions of the gastrointestinal tract move between the rolls to pull the gizzard down against the rolls and to pull the tender lining section down between the rolls so that the rolls grip the tender lining section of the gizzard sufficiently to hold the gizzard down against the rolls;
• and
• smoothly increasing the gripping force applied to the tender lining section by the viscera removal rolls along the juncture between the tender lining section and the rest of the gizzard to separate the tender lining section from the gizzard along with both the food intake and digestive portions of the gastrointestinal tract attached to the tender lining section.

Apparatus for separating gizzards from the food intake and digestive portions of the gastrointestinal tract attached thereto successively conveyed along a conveying path by an overhead conveyor system so that the gizzard and attached food intake and digestive portions of the gastrointestinal tract of each bird remains associated with the bird as the bird and associated viscera are conveyed along the conveying path with at least the digestive portion of the gastrointestinal tract dangling below the birds so that the gizzard and attached gastrointestinal tract are moved past an unloading station including:

• viscera removal means for receiving the gizzard with the attached food intake and digestive portions of the gastrointestinal tract and separating the attached food intake and digestive portions of the gastrointestinal tract from the gizzard;
• and
• mechanical feeding means at the unloading station for mechanically engaging the gastrointestinal tract still attached to a gizzard as the gizzard with attached gastrointestinal tract is conveyed past the unloading station to individually separate each gizzard with the attached gastrointestinal tract from association with the bird and the conveyor system while leaving the food intake and digestive portions of the gastrointestinal tract still attached to the gizzard, successively moving each gizzard with the gastrointestinal tract from the conveying system to the viscera removal means with a prescribed time interval between successive gizzards and depositing the gizzard and attached viscera at a prescribed position in the viscera removal means.

In a viscera processing system for separating the gizzard from the food intake and digestive portions of the gastrointestinal tract of the viscera where the gizzard with the food intake and digestive portions of the gastrointestinal tract still attached thereto through the tender lining section is conveyed along a poultry processing line by overhead conveying means so that the gizzard and attached food intake and digestive portions of the gastrointestinal tract of each bird remains associated therewith as the bird and associated viscera are conveyed along the processing line with at least the digestive portions of the gastrointestinal tract dangling below the birds, the improvement including length adjusting means positioned a prescribed distance below the overhead conveying means so that those portions of the gastrointestinal tract dangling below the birds moving along the poultry processing line moves past said length adjusting means, said length adjusting means adapted to mechanically and automatically cut off those portions of the gastrointestinal tract dangling below the level of said length adjusting means while leaving sections of both the food intake and digestive portions of the gastrointestinal tract still attached to the gizzard and while leaving the gizzard and attached viscera still conveyed by the overhead conveying means along the processing line, said length adjusting means comprising:

• a support frame;
• a shear mechanism including a pair of pivoted shear blades positioned a prescribed distance below the gizzards moving along the conveying path and aligned with the viscera moving along the conveying path therebetween as said shear blades are pivoted together;
• and
• drive means for alternately pivoting said shear blades together and apart at a rate such that the viscera attached to the gizzard with a length greater than said prescribed distance will pass between said shear blades and be cut to a length substantially equal to said prescribed distance.

A method of separating gizzards from the tender lining section as well as the food intake and digestive portions of the gastrointestinal tract naturally connected to the gizzard through the tender lining section comprising the steps of:

• depositing the gizzard with the food intake and digestive portions attached on top of a pair of viscera removal rolls arranged in a side-by-side relationship;
• engaging the food intake and digestive portions with infeed sections on the viscera removal rolls to pull both the food intake and digestive portions down between the rolls until the gizzard is seated against the rolls with the tender lining section projecting down between the rolls without removing the food intake and digestive portions and the tender lining section from the gizzard;
• moving the gizzard with the attached food intake and digestive portions lengthwise of the viscera removal rolls while maintaining the gizzard seated against the viscera removal rolls;
• and
• while the gizzard is maintained seated against the viscera removal rolls, smoothly engaging the tender lining section with intermeshing helically toothed sections on the viscera removal rolls to smoothly increase the gripping force on the tender lining section to simultaneously remove at least a portion of the tender lining section along with both the food intake and digestive portions of the gastrointestinal tract from the gizzard.

A viscera processing method comprising the steps of:

• conveying poultry along with the gizzards having the food intake and digestive portions of the gastrointestinal tract still attached along a common conveying path so that the gizzard and attached food intake and digestive portions of the gastrointestinal tract of each bird remain associated therewith as the bird and associated viscera are conveyed along the conveying path with at least the digestive portion of the gastrointestinal tract hanging below the gizzard and the bird;
• and
• while the gizzards are so conveyed with the food intake and digestive portions of the gastrointestinal tract still attached, mechanically engaging the gastrointestinal tract attached to each gizzard to successively remove the gizzards with the food intake and digestive portions of the gastrointestinal tracts still attached to the gizzards from the conveying path and out of association with the birds and transferring the gizzard with the food intake and digestive portions of the gastrointestinal tract still attached to a viscera separating means with prescribed time intervals between successive gizzards;
• and
• separating the food intake and digestive portions of the gastrointestinal tract from the gizzard in the gizzard separating means.