Robert C Horton

US Patent:

20130199383, Aug 8, 2013

Filed:

Jan 31, 2013

Appl. No.:

13/756043

Inventors:

Robert H. Horton - Springboro OH, US
Donald A. Shaw - Springboro OH, US
William H. Williams - Franklin OH, US

International Classification:

B30B 9/12
B30B 9/14

US Classification:

100 37, 100145, 100117

Abstract:

A rendering method involves heating the animal protein and thereafter feeding the heated animal protein through a rendering screw press machine having an internal shaft assembly that includes a working portion with an overall compression ratio of greater than about 7 to 1, a first scroll flight section configured for decreasing cake thickness, followed by a first high compression cone section, followed by a stepped decompression section, followed by a second scroll flight section configured for decreasing cake thickness, followed by a second high compression cone section, followed by a straight collar section. Rotating the shaft assembly moves the heated animal protein through the machine such that liquid fat passes out through a barrel cage and substantially dried animal protein cake is output from the choke opening, and the heated animal protein only undergoes one stepped decompression during such movement.