Abstract: A modular type replaceable heating unit with a downwardly facing heating ring for use in an apparatus for sealing a flat lid with a lower layer of heat bondable material onto the upper, generally flat surface of a flange extending around the periphery of an access opening in a container. The apparatus moves the heating unit between first and second positions. The apparatus includes a generally fixed high frequency power supply for energizing the heating ring, connecting the high frequency power supply to the heating ring only while the heating unit is moving between the first and second positions. The ring is forced against the lid as the power supply is energized and is released from the lid after the power supply has been de-energized. Preferably the ring is an inductor. A plurality of these heating units is carried by a turret to define individual heating stations on the turret which stations rotate to selectively energize the individual heating units.

Abstract: A method and apparatus for sealing a flat lid with a lower layer of heat bondable material onto the upper, generally flat surface of a flange extending around the periphery of an access opening in a container of the type used to store a substance subsceptible to deterioration when exposed to atmosphere for a prolonged time such as prepared foods, which method and apparatus moves a separate and distinct heating unit with a downwardly facing heating ring in a preselected path, preferably circular in shape, between first and second positions, includes a generally fixed high frequency power supply for energizing said heating ring, connects this fixed high frequency power supply to the individual heating rings of the moving heating unit only when the unit is moving between the first and second positions, and energizes the power supply only while the heating unit is moving between the first and second positions.

Abstract: A method and apparatus for sealing a flat lid with a lower layer of heat bondable material onto the upper, generally flat surface of a flange extending around the periphery of an access opening in a container of the type used to store a substance susceptible to deterioration when exposed to atmosphere for a prolonged time such as prepared foods, which method and apparatus moves a separate and distinct heating unit with a downwardly facing heating ring in a preselected path, preferably circular in shape, between first and second positions, includes a generally fixed high frequency power supply for energizing said heating ring, connects this fixed high frequency power supply to the individual heating rings of the moving heating unit only when the unit is moving between the first and second positions, and energizes the power supply only while the heating unit is moving between the first and second positions.

Abstract: A method and apparatus for sealing a flat lid with a lower layer of heat bondable material onto the upper, generally flat surface of a flange extending around the periphery of an access opening in a container of the type used to store a substance susceptible to deterioration when exposed to atmosphere for a prolonged time such as prepared foods, which method and apparatus moves a separate and distinct heating unit with a downwardly facing heating ring in a preselected path, preferably circular in shape, between first and second positions, includes a generally fixed high frequency power supply for energizing said heating ring, connects this fixed high frequency power supply to the individual heating rings of the moving heating unit only when the unit is moving between the first and second positions, and energizes the power supply only while the heating unit is moving between the first and second positions.

Abstract: A method and apparatus for induction heating and quench hardening of an undulating cylindrical surface, such as that defined by gear or sprocket teeth, provide a hardness pattern uniformly distributed to a controlled depth across and between the teeth surfaces by means of axial scanning of the workpiece relative to a single induction heating coil. A distinct final heating scanning process follows a preheating scanning process whereby preheating and final heating can be conducted at differing controlled axial velocities. Axial scanning of the workpiece repeatedly past a single inductor coil enables preheating and final heating of workpieces which cannot be axially shifted directly between separate inductor coils, such as internal planetary ring gears having a closed end or external gears having a flange or shoulder protruding radially from the cylindrical gear teeth surface.

Abstract: A method and apparatus for installing steel liner sleeves in the cylinder bores of an aluminum engine block comprises axially sliding the liner sleeves onto slide portions of respective mandrels, over an inductor coil on the free outer end of each mandrel. After axially moving the mandrels to insert their inductor coils into the cylinder bores and then energizing the coils to inductively heat the walls of the cylinder bores to a predetermined elevated temperature to expand the bores to a diameter sufficient to axially receive the liner sleeves therein with a snug sliding fit, the coils are de-energized and the liner sleeves then immediately axially slid along the mandrels to a position over the de-energized coils and within the annular coupling gap space between the coils and the bore walls, and into their axially inserted position within the heated cylinder bores, in which position they are maintained until the cylinder bore walls cool and contract to form a tight shrink fit around the liner sleeves.

Abstract: A camshaft heat treating apparatus and method for processing a plurality of apparatus and method designs, which camshaft identifies and thereafter automatically inductively heats, quenches and inspects the camshaft in accordance with its design parameters.

Abstract: Method and apparatus for heating a billet of magnetic metal material to a forging or other elevated processing temperature above the Curie point temperature of the workpiece metal by first inductively preheating the billet in an induction heating coil to a preheat temperature not appreciably higher than the Curie point temperature of the workpiece metal, and then conveying the preheated billet from the induction heating coil into, and post-heating it to the elevated processing temperature within, the heating chamber of a slot-type high efficiency electric radiant heat electric furnace.

Abstract: A camshaft heat treating apparatus for processing a plurality of camshaft designs, which camshaft identifies and thereafter automatically inductively heats, quenches and inspects the camshaft in accordance with its design parameters.

Abstract: Method and apparatus for heating a billet of nonmagnetic metal material to forging temperature by first preheating the billet in a high efficiency slot-type electric radiant heat furnace to a preheat temperature a substantial level below the forging temperature, and then conveying the preheated billet from the furnace immediately into an inductive heating coil and energizing the coil to inductively post-heat the billet to the forging temperature.

Abstract: A method of hot-shearing an elongated metal bar into sections of given gauge length comprises longitudinally indexing the metal bar to position cross-sectional zones thereof where it is to be sheared successively at a plurality of heating stations at which the shear zones of the bar are progressively heated by resistance heating units to reduce the force required for subsequent shearing of the bar through the heated shear zones on ensuing index thereof to a shearing station.

Abstract: An inductor for heating the circumferentially opposed working surfaces and the root surface between adjacent gear teeth includes a nose portion received between the adjacent teeth and having a profile corresponding to that of the working and root surfaces. The nose portion is comprised of a flux concentrator having axially opposite ends and radially inner and outer ends, a generally V-shaped conductor plate having ends attached to the radial inner end of the concentrator and defining a coolant passageway therewith, and tubular conductors at the axially opposite ends of the flux concentrator and plate to provide for the circulation of coolant through the nose portion. A portion of the tubular conductor extends axially adjacent the radially outer side of the flux concentrator.

Abstract: A device for heating an elongated workpiece having a central axis which device comprises first and second axially spaced and axially aligned multiturn induction heating coils, each of which has a workpiece receiving passage extending therethrough. Means are provided for indexing a workpiece axially first into the passage of the first coil and then, after a time delay, axially into the passage of the second coil.

Abstract: There is provided a method and apparatus for inductively heating elongated workpieces having a central axis and mounted in workpiece receiving stations of an indexable turret. A single shot inductor located within the path generally followed by the indexing workpieces is used to heat the workpieces. One of the turret stations, when empty, is indexed past the single shot inductor in a first direction and is loaded with a workpiece. Thereafter, the loaded station is indexed in a second direction into the heating position with the workpiece located in the single shot inductor. Thereafter, the workpiece is indexed from the single shot inductor for subsequent processing on the turret.