Abstract: An oven includes a cooking chamber, a gas-fired heat exchanger external of the cooking chamber and a flow path for circulating air from the cooking chamber past the heat exchanger to pick-up heat and then back to the cooking chamber under operation of a blower. A first combustion path gas flow path runs from the heat exchanger to an exhaust system for delivering combustion path gases away from the oven, and a second combustion path gas flow path runs from the heat exchanger to the cooking chamber for delivering combustion path gases into the cooking chamber. A control arrangement is configured to selectively control the flow of combustion path gases along at least one of the first combustion gas flow path or the second combustion gas flow path.

Abstract: A rack oven includes a cooking chamber accessible via a door and a rack rotating mechanism within the cooking chamber. A combustion chamber is separated from the cooking chamber by at least one wall, the combustion chamber including a burner. A circulation flow path is provided for delivering gases from the cooking chamber into the heating chamber and past the burner in the combustion zone to pick-up heat and combustion gases for delivery back to the cooking chamber to heat the cooking chamber. A flame protector located in the heating chamber in the circulation flow path upstream of the burner prevents gases moving past the burner from extinguishing the burner.

Abstract: A rack oven includes a cooking chamber accessible via a door and a rack rotating mechanism within the cooking chamber. A combustion chamber is separated from the cooking chamber by at least one wall, the combustion chamber including a burner. A circulation flow path is provided for delivering gases from the cooking chamber into the heating chamber and past the burner in the combustion zone to pick-up heat and combustion gases for delivery back to the cooking chamber to heat the cooking chamber. A flame protector located in the heating chamber in the circulation flow path upstream of the burner prevents gases moving past the burner from extinguishing the burner.

Abstract: An oven includes a cooking chamber, a gas-fired heat exchanger external of the cooking chamber and a flow path for circulating air from the cooking chamber past the heat exchanger to pick-up heat and then back to the cooking chamber under operation of a blower. A first combustion path gas flow path runs from the heat exchanger to an exhaust system for delivering combustion path gases away from the oven, and a second combustion path gas flow path runs from the heat exchanger to the cooking chamber for delivering combustion path gases into the cooking chamber. A control arrangement is configured to selectively control the flow of combustion path gases along at least one of the first combustion gas flow path or the second combustion gas flow path.

Abstract: A cutting insert-shim assembly that has a cutting insert with a bottom surface and a plurality of interior coolant passages wherein each interior coolant passage has a coolant inlet in the bottom surface of the cutting insert. The shim has a first side surface and a second side surface and contains a cavity, which communicates with the coolant conduit. The cavity defines a first opening in the first side surface and a second opening in the second side surface. When the shim is in a first condition, the first side surface contacts the bottom surface of the cutting insert and the first opening provides a first level of coolant communication to the interior coolant passages in the cutting insert. When the shim is in a second condition, the second side surface contacts the bottom surface of the cutting insert and the second opening provides a second level of coolant communication to the interior coolant passages in the cutting insert.

Abstract: An oven includes a chamber for receiving a food product rack. A heating system provides heat to the chamber for a cooking operation. A rotatable output member extends downward from a top portion of the chamber. A pivot support extends upward from a bottom portion of the chamber. A food product rack is removably located in the chamber and is releasably connected to the rotatable output member for rotation therewith. The food product rack includes a frame assembly including multiple sides. Multiple tray supports are located along the height of the frame assembly. A bottom support extends laterally between opposite sides of the frame assembly and passes through a vertical rotation axis of the frame assembly. The bottom support is connected at one end to a bottom portion of one side of the frame assembly and is connected at an opposite end to the bottom portion of an opposite side of the frame assembly.

Abstract: An assembly of components for forming upon consolidation of the components a cutting insert for use in chipforming and material removal from a workpiece wherein the cutting insert receives coolant from a coolant source. The assembly comprises a cavity member that presents opposite first and second rake surfaces and a flank surface. The cavity member further presents a first cutting edge at the juncture of the first rake surface and the flank surface. The cavity member further has a first depression in the first rake surface that is generally adjacent to the first cutting edge. The cavity member has a first cavity channel in communication with the first depression.

Abstract: A cutting insert-shim assembly that has a cutting insert with a bottom surface and a plurality of interior coolant passages wherein each interior coolant passage has a coolant inlet in the bottom surface of the cutting insert. The shim has a first side surface and a second side surface and contains a cavity, which communicates with the coolant conduit. The cavity defines a first opening in the first side surface and a second opening in the second side surface. When the shim is in a first condition, the first side surface contacts the bottom surface of the cutting insert and the first opening provides a first level of coolant communication to the interior coolant passages in the cutting insert. When the shim is in a second condition, the second side surface contacts the bottom surface of the cutting insert and the second opening provides a second level of coolant communication to the interior coolant passages in the cutting insert.

Abstract: An assembly of components for forming upon consolidation of the components a cutting insert for use in chipforming and material removal from a workpiece wherein the cutting insert receives coolant from a coolant source. The assembly comprises a cavity member that presents opposite first and second rake surfaces and a flank surface. The cavity member further presents a first cutting edge at the juncture of the first rake surface and the flank surface. The cavity member further has a first depression in the first rake surface that is generally adjacent to the first cutting edge. The cavity member has a first cavity channel in communication with the first depression. The assembly also has a first core member that has a first core channel and a first flange wherein when the components are assembled, the first core channel is adjacent to the first cavity channel and the first flange is adjacent to the first depression.

Abstract: An oven includes a chamber for receiving a food product rack. A heating system provides heat to the chamber for a cooking operation. A rotatable output member extends downward from a top portion of the chamber. A pivot support extends upward from a bottom portion of the chamber. A food product rack is removably located in the chamber and is releasably connected to the rotatable output member for rotation therewith. The food product rack includes a frame assembly including multiple sides. Multiple tray supports are located along the height of the frame assembly. A bottom support extends laterally between opposite sides of the frame assembly and passes through a vertical rotation axis of the frame assembly. The bottom support is connected at one end to a bottom portion of one side of the frame assembly and is connected at an opposite end to the bottom portion of an opposite side of the frame assembly.

Abstract: An assembly for retaining a cutting insert in a pocket of a tool holder includes a locking pin, a spring disposed in the bore of the tool holder, a locking plate disposed in the bore between the spring and the locking pin, and a set screw for retaining the assembly. The locking plate is biased against a ledge of the bore to cause the locking pin to draw and retain the cutting insert in a direction such that the cutting insert is held in a secured position against the pocket of the tool holder. To release the cutting insert, a force is applied to the assembly to counteract the biasing force of the spring. The locking pin or the locking plate may include a flat surface that cooperates with a flat surface on the bore to act as a key to proper orientate the assembly in the bore.

Abstract: A cutting insert includes an upper, lower and side surfaces and at least one leading cutting edge and a trailing wiper edge formed at an intersection of the upper surface with the side surface. A corner separates the leading cutting edge from the trailing wiper edge. The top surface includes a plurality of planar rake surfaces that extend inwardly and downwardly toward a seating surface of the insert. The top surface also includes a plurality of chip deflecting surfaces extending inwardly and upwardly toward the seating surface to form a transition zone between adjacent rake surfaces. The rake surfaces form a land angle with respect to a line perpendicular to the leading cutting edges. Additionally, a back wall surface extends upwardly from the rake surfaces to the seating surface to form a transition zone between the rake surfaces and the seating surface.

Abstract: A cutting insert includes an upper, lower and side surfaces and at least one cutting edge formed at an intersection of the upper surface with the side surface. A rake face of the insert is formed with one or more undulated chip forming grooves extending along the cutting edge and comprising a succession of alternating depressed and raised portions. Each depressed and raised portion is radially aligned with a central axis of the insert along the entire width of the chip forming groove.

Abstract: A cutting insert for a metalworking operation includes a polygonal body of hard wear resistant material. The body has a top surface and a bottom surface, and therebetween a peripheral wall including adjacent first and second wall portions. The intersection of the first wall portion and the top surface forms a first cutting edge, and the intersection of the second wall portion and the top surface forms a second cutting edge. The first cutting edge and the second cutting edge meet to form a high point which is adapted to engage a workpiece first during the metalworking operation. In one embodiment, the top surface of the cutting insert has a topography that promotes chip control. The topography includes a plain adjacent to the cutting edges, and a plateau on the plain, which is, located inward from the cutting edges. The plateau is elevated relative to the plain and has a sloped side.

Abstract: A cutting insert includes an upper, lower and side surfaces and at least one leading cutting edge and a trailing wiper edge formed at an intersection of the upper surface with the side surface. A corner separates the leading cutting edge from the trailing wiper edge. The top surface includes a plurality of planar rake surfaces that extend inwardly and downwardly toward a seating surface of the insert. The top surface also includes a plurality of chip deflecting surfaces extending inwardly and upwardly toward the seating surface to form a transition zone between adjacent rake surfaces. The rake surfaces form a land angle with respect to a line perpendicular to the leading cutting edges. Additionally, a back wall surface extends upwardly from the rake surfaces to the seating surface to form a transition zone between the rake surfaces and the seating surface.

Abstract: A cutting insert for a metalworking operation includes a polygonal body of hard wear resistant material. The body has a top surface and a bottom surface, and therebetween a peripheral wall including adjacent first and second wall portions. The intersection of the first wall portion and the top surface forms a first cutting edge, and the intersection of the second wall portion and the top surface forms a second cutting edge. The first cutting edge and the second cutting edge meet to form a high point which is adapted to engage a workpiece first during the metalworking operation. In one embodiment, the top surface of the cutting insert has a topography that promotes chip control. The topography includes a plain adjacent to the cutting edges, and a plateau on the plain, which is, located inward from the cutting edges. The plateau is elevated relative to the plain and has a sloped side.