Abstract: A rotating vacuum kiln and method for heat treating solid particulate material under vacuum conditions uses a rotating refractory metal cylindrical vessel with a cool inlet zone, hot intermediate zone, and cool exit zone, with a first series of inner radiation shields provided at the hot intermediate zone adjacent to the cool inlet zone and a second series of inner radiation shields provided at the hot intermediate zone adjacent the cool exit zone to protect those two zones from the high temperatures in the hot intermediate zone. Heat for the hot intermediate zone of the cylindrical vessel is provided indirectly by electrical resistance heaters that surround the vessel and outer radiation shields are provided about the heaters to direct heat to the cylindrical vessel.

Abstract: A mercury retorting apparatus, a retorting system, and a method for continuous removal of mercury from dry, semi-granular, and sludge materials contaminated with mercury without shutting down the system for removal of accumulated liquid mercury, water, and dust particles. The retorting apparatus comprises a powered screw feed assembly having a feed tube with a closely fitting feed screw therein. The screw feed assembly feeds the material from the lower portion of a hopper configured to contain a quantity thereof into a rotatably powered retorting tube in which a vacuum is drawn. The material forms a seal within the powered screw feed assembly against vacuum loss in the retorting tube during operation thereof. A first rotatable seal between the feed tube and retorting tube prevents vacuum loss therebetween. An elongate electric kiln encloses the mid-portion of the retorting tube.

Abstract: The present invention of a spinning tray for oven mainly includes a tray body for placing food. The tray body having a hole at its center for inserting a sensor rod. A spring is disposed underneath the sensor rod, a positioning frame is placed outside the spring and is fixed underneath on the tray body. A lower board of the positioning frame is provided for the spring to be compressed against. A L-shaped stopping bar is extended from the bottom of the sensor rod. A spinning mechanism includes a positioning board, few stand poles are disposed vertically underneath on the tray body for screwing to the positioning board by screws. A main axle goes through the positioning board. The main axle is wrapped around by a spring and is sleeved with a gearing. The main axle engages with the gearing by the elasticity provided by the spring. The gearing is engaged to few gear sets and a spinning blade is activated by a gear wheel. The whole spinning mechanism is covered by a cover and is fixed on the positioning board.

Abstract: The invention relates to an apparatus for subjecting objects to processes, wherein the apparatus comprises a plurality of chambers wherein are each adapted to contain at least one object; and processing devices for processing objects present in the chambers, wherein the chambers are adapted to successively perform different processes on the object present in the chamber. According to a first embodiment, the chambers are moveable in accordance with a closed circuit and the processing devices are adapted to perform a process on the object which is present in a chamber present in a defined position. According to a second embodiment the chambers are arranged fixedly and transporting means are arranged to carry the objects for processing and the processed objects in and out of the chambers.

Abstract: A thermal reflow processing system has a rotatable structure to which articles having a reflowable surface are attached. The structure is coupled to a drive motor which causes the structure to rotate at speeds which generate centripetal forces in excess of that of gravity. The system is equipped with at least one radiant heat source. As the articles are being subjected to a centripetal force, the surface is heated by the radiant heat source. In a preferred embodiment, the structure is a hermetically-sealable chamber which can be pressurized or evacuated. The articles, which may be semiconductor wafers, are positioned on the rotating structure such that the surface to be reflowed faces both the heat source and the structure's rotational axis. In the case of circular semiconductor wafers, the wafers are positioned such that the planar surface of each wafer is centered on and perpendicular to a radius of the cylindrical chamber.

Abstract: The invention relates to a household electric cooking apparatus, of the frying type, without oil bath, intended to cook frozen or fresh food products such as french fries, etc, without unpleasant smell, without smoke and in a dietetic way. It is comprised of a body which contains a metal housing (2). The cooking is performed by short wavelength infrared radiations. Inside said housing, a removable basket (12) made of perforated metal, rotating upon itself, is driven by an electric motor (13). Between the inner housing (2) and the resistors (11), is provided a removable reflector (14) to facilitate the cleaning of the frying unit. The apparatus is light, has reduced dimensions and cooks very rapidly food lproducts without the risks and disavantages related to the manipulation of boiling oil.

Abstract: A grilling appliance includes a housing defining an internal grilling compartment for receiving a food article to be grilled; an impaling member mounted within the grilling compartment for impaling a food article to be grilled; a circular array of electrical heaters surrounding the impaling member for heating the food article impaled thereon. The impaling member is non-rotatably mounted to the housing within the grilling compartment, and the electrical heaters are sequentially energized to produce a rotating heating front which rotates around the impaling member to heat the article impaled thereon.

Abstract: A method and device for quickly, easily, efficiently and safely dispensing hot melt from a container includes a dumper for receiving a container of hot melt. The dumper has removable smooth inner sheeting for receiving and holding canisters of different materials. The dumper has a heater heated by overlapping conducting coils for heating the hot melt in the container. The dumper receives the hot melt container at floor level and thereafter is actuated to move the dumper over and about a hopper to invert the container above the hopper. Additionally, the dumper forms a hermetic seal about the container and the hopper for firmly holding the container within the dumper to allow the hopper and the bottom of the container to be subjected to a controlled atmosphere.

Abstract: A rice cooker is placed on a turntable, and uncooked rice is poured thereinto. As the uncooked rice is poured-in, a motor rotates the turntable alternately clockwise and counterclockwise to cause the rice to be evenly distributed therein. The cooker carries a signal emitter which is received by a receiver that is connected to the motor for controlling the motor.

Abstract: The invention relates to a hot air oven for the preparation of foodstuffs, having: a casing; a refining chamber bounded by four side walls, a bottom wall and a cover wall; a first fan for producing a hot air flow in the refining chamber; a rotatable basket for the foodstuffs which can be introduced into the refining chamber and through which the hot air flow passes during operation; a control device for the performance of the refining process, said control device comprising a temperature-regulating system; and at least one air supply channel and at least one air discharge channel, a more reliable and low-maintenance operation of which is made possible by the provision of at least one flap to open or close the air supply channel and/or the air discharge channel.

Abstract: The invention relates to a hot air oven for the preparation of foodstuffs with a housing, with a cooking chamber delimited by four side walls as well as a bottom and a ceiling, with a first (2) blower for generating a hot air flow in the cooking chamber, with a rotatable basket (4) for the foodstuffs (5), which can be inserted into the cooking chamber, wherein the basket (4) can be rotated around an axis of rotation and the hot air stream flows through it during operation, wherein the basket (4)is guided into the direction required for insertion into the cooking chamber by means of guide elements (10) wherein the guide elements (10) are provided with a friction-reducing surface.

Abstract: An electric oven including a base provided on a top with a groove, a motor arranged within the base and having an output shaft upwardly extending out of the base, an annular member having a plurality of rollers at a circumference thereof and disposed on the top of the base, a plug connected with an upper end of the output shaft, a tray disposed on the annular member and fixedly connected with the plug, the tray being provided with a supporting frame thereon, an outer housing fixedly mounted on the top of the base and surrounded by the groove of the base, a cover engaged with the upper outer housing, a door rotatably connected with the groove of the base, and a plurality of heating rods fixedly mounted between the base and the cover.

Abstract: An apparatus for dry-cooking food products, having a thermo-ventilated cooking chamber (35) and a rotatable container (2) for food products, internal to the cooking chamber (35), with rotatably supported holed walls (8), which retains and mixes the food products. The container (2) is interpositioned between loading and unloading stations (90, 91) of the products positioned at levels respectively overlying and underlying the container (2), has a single opening (13) with a hatch (12), mobile from an initial open position in which the opening (13) is turned towards the loading station (90), to an intermediate closed position in which the container (2) rotates, to a final open position in which the opening (13) is turned towards the unloading station (91). The container (2) is blocked by rotation stop means (6). The apparatus (1) also comprises command means (7) of the activating and stop means (5, 6).

Abstract: A heating apparatus for articles of food comprises a receptacle (4) where the articles of food which are to be heated are brought and which may rotate around a axis during heating. The apparatus further comprises a cover (6) which forms with the receptacle (4) substantially closed chamber during heating. The axis may form an adjustable first angle with a vertical line. The apparatus further comprises a roof (6) which may rotate relatively with regard to the recipient (4) over a second angle which is smaller than 60.degree. to allow for filling or emptying the heating apparatus with articles of food. The heating apparatus may be used for substantially all articles of food which may be heated and the apparatus has a good thermal efficiency.

Abstract: A crystal, which is mounted in a rotatable support for use in tuning the wavelength of an optical parametric oscillator, is maintained at a desired temperature by positioning a heating sleeve to thermally coupled to the crystal and its support in such a way that the crystal is still free to rotate. The heating sleeve has an embedded heating element for connecting to an electronic controller whose dynamic output response matches the dynamic temperature characteristics of the combination of components including the crystal, it rotatable holder and the heating sleeve, so as to quickly stabilize changes in the crystal temperature with a minimum amount of overshoot.

Abstract: An apparatus is provided for coiling fluorescent tubes, so that the tubes may be placed within a bulb. The apparatus includes a rotatable turntable having a plurality of ovens thereon. Each oven has a lever to enable the oven to be opened for placement of a fluorescent tube therein. A piston/cylinder assembly is mounted in proximity to the rotatable turntable and can selectively engage one of the levers for opening the corresponding oven. A ratchet assembly is provided for selectively rotating the turntable into positions where the piston/cylinder assembly in contact one of the levers and open the respective oven. A tube coiling screw is disposed in proximity to the turntable to enable coiling of a fluorescent tube thereabout after sufficient heating in one of the ovens.

Abstract: A forced air oven for and a method of heating, cooking or roasting granular food, such as nuts, seeds and coffee beans. The apparatus houses a hollow cylindrical drum into which food is placed. A heated gaseous stream is forced through the inside of the drum with sufficient force to blow the food away from the inside surface of the drum. In addition, perforations in the drum are positioned such that the heated gaseous stream blows the food toward a rear end of the drum and causes the food to churn. This churning allows the heated air to envelope the outside surface of the food and provides an even transmission of heat to the food. In addition, the drum is provided with a helical fin that pushes the food toward a front end of the drum. A wire mesh is also provided for collecting particles that are dislodged from the food, and an exhaust system is provided for venting the gasses created during the heating, cooking or roasting of food.

Abstract: An outer cylindrical stationary housing is mounted on a support frame. An inner removable rotating drum mounted at an angle of 6-7 degrees from the base of the apparatus is turned by a shaft driven by an electric motor turning the shaft at 2-4 rpm. A heater element maintains about 350 degrees F in the rotating drum to roast nuts and multiple vanes mounted within the inner rotating drum keep the nuts tumbling so that they are evenly heated.

Abstract: The kiln (1) for producing litharge has a thermally insulated tubular body (2) containing, throughout its length, a shaft (30) with paddles acting as an auger. The tubular body (2) is coaxial with an induction coil (11), which heats it. The raw material in powder form (i.e., the massicot) is charged at a first head (9) of the tubular body (2) and is moved forwards by the paddle shaft (30), until it reaches the second head (10), opposite to the first one (9). During the translation the material (massicot) is heated and is oxidated, being converted into litharge.

Abstract: Automatic forced air food heating apparatus having an automatic feeding bin for automatically feeding french fries or the like into a rotary heating basket, a warming compartment for maintaining foods heated in the heating basket at serving temperature for extended periods of time, automatically-operated means for automatically dropping the heated food into the warming compartment, automatically-operated means for shielding the operator from direct contact with the heating basket, and automatic cooling means for cooling the apparatus in preparation for the manual cleaning thereof, etc.

Abstract: A toaster having double-wall construction controls the flow of air within its interior so that its exterior is kept cool. Air intake occurs near the edge of the top toaster slot where bread or the like is inserted for toasting. Intake air then travels down the immediate interior of the toaster and is introduced to the toasting chamber and an associated warm air flow channel near the bottom of the toaster. Air warmed by the toasting chamber and associated channel rises and pulls cooler air from below. The warm exhaust air is channelled away from the cool intake air by means of a top cover.

Abstract: A closed-loop air cooking system for use in a vending machine that vends french fried potatoes and the like, including: a) a closed-loop air duct assembly; b) a cooking basket mounted for rotation within the air duct assembly; c) a fan for forcing air through the air duct assembly; d) a separator for removing entrained particulates from the air stream within the air duct assembly; and e) a heater for heating air that circulates within the air duct assembly. In addition, the cooking system includes a separator for removing oil and other particulates from the closed-loop air stream.

Abstract: The present invention is drawn to a combination microwave/infrared oven heating a box-like structure in which a plurality of chambers are defined. A microwave heating source is associated with at least one of the chambers for generating microwaves therein, an infrared short-wave radiation source is associated with at least another one of the chambers for generating short-wave infrared radiation therein, and a medium-wave infrared radiation source is associated with at least yet another one of the chambers for generating medium-wave infrared radiation therein. A rotary conveyor is rotatably supported in the oven within the box-like structure and conveys foodstuffs in the oven successively through the chambers. An electronic circuit including a central logic system controls the operation of the rotary conveyor to set the time periods during the foodstuffs conveyed in the oven remain in respective ones of the chambers.

Abstract: A high frequency heating apparatus comprises a heating chamber (28), a metal skewer (5), a rotary driving portion (F) and a coupling (13). The heating chamber (28) comprises a high frequency generator (3) and a heater (2) for heating foods (26) contained therein. The metal skewer (5) supports the skewered food (26) and is rotatably suspended between both sidewalls (28b, 28c) of the heating chamber (28). The rotary driving portion (F) is provided for rotating the metal skewer (5) in the heating chamber (28). One end portion (5a) of the metal skewer (5) is coupled with the rotary driving portion (F) by the coupling (13). The coupling (13) is provided on the outside of one sidewall (28c) of the heating chamber (28). A support member (G) is provided at the position opposed to the coupling (13) for rotatably supporting the other end portion of the metal skewer (5). The support member (G) is detachably provided projecting from the other sidewall (28b) of the heating chamber (28).

Abstract: A bulk material processor includes a barrel assembly with first and second ends, the first end having an inlet and an outlet. A rotor assembly is rotatably mounted within the barrel assembly and includes a screw auger positioned within a generally cylindrical body. Vanes extend longitudinally along the rotor body and project outwardly therefrom. A feeder assembly delivers bulk material to the barrel assembly inlet for augering through the rotor assembly. Upon exiting the rotor assembly, the material is swept around the inside of the barrel assembly for intermittent exposure to infrared radiation from a heater assembly mounted on top of the barrel assembly.

Abstract: A self-cleaning continuous cooking oven is provided which is capable of rapidly cooking different foodstuffs with a recirculated hot air. The oven has a cabinet defining said oven cavity, an inlet chute for food portions to be cooked, and an outlet chute for cooked food portions. These chutes may be sealed during an oven cleaning cycle. Within the cavity there is a rotatable cooking chamber including a cylindrical wall having a longitudinal axis and having an inlet end and an outlet end. A conveying member extends along and projects inward from the interior of the cylindrical wall defining a food carrying passage extending to the outlet end of said cooking chamber, and food passed into the inlet chute progresses through the chamber and exits via the outlet chute means rotatably supporting said cooking chamber in said oven cavity with said inlet end adjacent said inlet chute and said outlet end discharging to said outlet chute.

Abstract: A swivel-truck bakery oven having a baking chamber, a charging door, an electric control box, a recirculation channel, a re-circulation fan, heating elements for heating the re-circulation air, mechanical and power equipment for rotatably driving the swivel truck, and a blowing manifold with vertical louvres and a steam generator. The oven consists primarily of a generally rectangular frame structure, with the frame structure having a central core of parallelipipedic configuration with a width substantially corresponding to the width of the charging door, which is determined, in turn, by the width of the swivel truck. The frame structure also has a pair of detachable lateral covers which each have an interior recess or cavity of a depth that is slightly greater than half the difference between the width and the diagonal length of the swivel truck.

Abstract: A turntable for use in a microwave oven which comprises a first rotatable axle secured to the plate of the turntable and disposed within an annular holder, the first rotatable axle including a cavity disposed along its center, an actuating gear having a shaft extended therefrom for being actuated to engage the cavity of the rotatable axle, the actuating gear including an aperture disposed along its center for receiving a second axle supported on a lower plate of a housing member and an annular cam disposed at the underside thereof, the annular cam having an inclined surface disposed along its periphery, a supporting roller secured to the lower plate of the housing member for slidably contact with the declined surface of the annular cam for moving the actuating gear upwardly and downwardly, and a main driving gear actuated by a motor, the main driving gear geared with the actuating gears for rotating horizontally and simultaneously vertically so that the turntable rotates and moves vertically.

Abstract: A portable rotisserie assembly for use in a microwave oven. The assembly comprises a base adapted to rest on a turntable or directly on the floor of the oven cavity, a rotor mounted on the base for rotation about a horizontal axis, and a drive motor mounted on the base.

Abstract: An oven for testing fluid samples to determine the effects of temperature and various chemical additives on the rheological, filtration and chemical properties of the sample under simulated circulating conditions comprises an environmental chamber having therein a plurality of motorized roller members which rotatably support a cylindrical enclosure containing a fluid sample. A heating element disposed beneath the rollers heats the chamber to a predetermined temperature which is maintained by a thermostat. An instrumentation and control panel disposed atop the chamber contains a digital thermometer display which eliminates the need to open the oven to check the temperature. A timer contained within the instrumentation and control panel may be preset to start and end the test automatically without having an operator in constant attendance.

Abstract: An inductance sensor is intended for determining or controlling the gap between a sealing strip and sector plate in a rotary regenerative air preheater of the rotating-matrix type, the strip being on the matrix and being swept past the non-rotating plate. The sensor has a U-shaped core the legs of which lie in a plane generally corresponding to that containing the sealing strip when nearest to the sensor. The legs have unequal coils on them. Energization of the coils allows information to be derived concerning the gap between the strip and plate which may be recorded, displayed, or directly used to adjust that gap to a desired value by movement of the sector plate.

Abstract: Rotisserie/stirrer for microwave ovens having a generally cylindrical food holding container mounted in an inclined position for rotation about both its own axis and a vertically extending axis. Peripheral gear teeth at the lower end of the container mesh with a stationary ring of gear teeth centered about the vertically extending axis and cause the container to rotate about its axis as the container is rotated about the vertically extending axis. A plurality of circumferentially spaced longitudinally extending ribs project inwardly from the side wall of the container and serve as a stirrer for food products in the container.

Abstract: A sample vessel container in a sampling device for use in gas chromatography includes a rotatable metal block having a circular array of axial bores for accommodating a plurality of sample vessels. A heating jacket operative as an electric heater is non-rotatably connected to a housing, which jacket tightly surrounds in material contact with, and is adapted to heat, the rotatable metal block.

Abstract: The rotary furnace has a generally cylindrical rotatable outer member that is driven by a belt and pulley arrangement. An inner member that defines the confines of the heating chamber is freely supported on the outer member to permit free expansion and contraction of the inner member with respect to the outer member. Insulating material disposed between the inner and outer members also joins the inner and outer members together during rotation of the outer member. The insulating material thus transmits the driving force from the outer member to the inner member to thereby cause rotation of the inner member. A cantilevered, non-rotatable heat supply structure extends into the inner member from one end thereof. An access opening to the heating chamber, that is normally sealed during furnace operation, is provided at the opposite end of the inner member.

Abstract: An adjustable welding furnace includes a gimbal-mounted furnace housing within which a workpiece may be preheated and subsequently welded. A removable cover is mounted over an access opening in the housing for pivotal movement along either of two edges of the opening. A rotatable spit assembly, which may be mounted in any of several positions on the housing, suspends the workpiece within the housing for rotation independent of pivotal movement of the housing. A drawer-mounted heating assembly may be easily removed from the housing for servicing.

Abstract: A housing for heating and rotating foodstuffs has a rotary foodstuff container through which heated air may pass during the heating of the foodstuffs. A door is provided so that the container may be removed axially from the housing. Suspension means for the container are also removable through the door opening. The door is designed to relatively seal the housing when closed.

Abstract: In a lead screw drive, such as that used in a lightweight lathe or milling machine for driving the workpiece relative to the cutting tool, the core of a drive nut is made of a material having a relatively low melting temperature, such as babbitt metal or a relatively rigid thermoplastic material. The low melting point material is contained within a nut housing as of steel. The openings in the nut housing for passage of the lead screw are scaled in a fluid type relation by means of elastic sealing members as of silicone rubber having a melting point above that of the relatively low melting point core portion of the nut. An electrical heating cartridge element is contained within the nut housing in good thermally conductive relation with the low melting point core material.

Abstract: A bi-rotational microwave oven turntable/rotisserie having a turntable which is moved in a closed path within the oven cavity while being concurrently rotated about a central axis of the turntable. A rotisserie device is associated with the turntable and includes a spit portion which is caused to rotate about the longitudinal axis thereof as an incident of rotation of the turntable about its central axis. The rotisserie, in turn, is rotated about a fixed axis defined by an input drive shaft. The turntable may be rotated by a gear meshing with a tooth portion of a hub journaling the drive shaft. The gear defines an axis of rotation of the turntable which may be rotatably carried on a support portion of the rotisserie device. The turntable may have a toothed periphery meshing with a tooth member fixed to the rotisserie spit portion for effecting rotation of the spit portion as an incident of rotation of the turntable relative to the support portion.

Abstract: A cooking device including an open topped vessel having a prismatic form and a polygonal base which is mounted for rotation about a horizontal axis parallel to its length. Motor means for oscillating the vessel in a rocking motion about the axis and a heat source is fixedly mounted above the vessel.

Abstract: The apparatus comprises: a container of a generally cylindrical shape or in the shape of a truncated cone capable of receiving small quantities of unroasted coffee and which can be closed by a lid and which is carried by a casing forming a base; a shaft inside the container extending in the axial direction and coupled to the output shaft of an electric motor disposed in the casing; at least one stirring means mounted on said shaft inside the container; a heating plate forming the bottom of the container and in which is embedded an electric resistance; and a timer disposed in said casing and having at least two controlled switches, one of which is in series with the current supply circuit for said motor and the other is in series with said heating resistance, this timer being adapted to determine, particularly with respect to the quantity of coffee to be roasted and with the degree of roasting desired, the heating time of the heating plate and the time during which said stirring member is driven.

Abstract: A heated, variable tilt, rotating container or pot for making possible automatic, continuous mixing or tumbling, with or without simultaneous heating, of a plurality of foods or substances. The device consists of an outer non-rotating shell pivoting on a fixed base. Inside the shell is a pot rotated by a motor attached to the bottom of the shell. A cover is secured over the pot to prevent the contents from spilling out. The shell and its pot are tiltable as a unit to any angular position from vertical to horizontal. Compartments, dividers, ridges, projections or other shapes are inside the rotating pot or on the pot wall and/or bottom, to separate, move, mix and tumble the contents when the tilt angle of the pot is other than at the vertical position. The shell contains a suitable heating system for raising the temperature of the pot. The device is provided with an automatic temperature control, motor speed control and automatic time cycle and function indicators.

Abstract: A boot dryer utilizes a housing having an ingress port and an egress port and a low current consuming motor driven fan therein. A pair of flexible hoses are removably secured to the ports of the housing and extend downwardly therefrom when the housing is supported by a wire-like hook pivotably secured to the uppermost regions of the housing. The hook is extensible in length facilitating and supporting the housing depending downwardly therefrom. The free end of the flexible hoses, removably secured to the ports of the housing, are cut so as to form an angle to the longitudinal axis of the hoses. In use, the hoses are inserted into a pair of boots exposed in side by side relationship and a slow cool flow of air enters one boot and circulates upwardly through one hose and through the housing and then downwardly through the other hose, exiting outwardly from the remaining boot, thus drying the boot without cracking or deteriorating the interior of the boot.

Abstract: A housing encloses a rotatable apertured cage containing foodstuffs is located to be rotated in air heated and impelled to pass through the cage. In one aspect of the invention the impeller is laterally displaced from the cage. In another aspect of the invention the cage is formed as a drawer designed to be withdrawn from the housing to allow loading and unloading the foodstuffs therein and designed to close the housing when inserted for rotation.

Abstract: A food cooking machine comprises a generally cylindrical vessel having liquid impervious walls, a closed end and an open end. A removable cap having a central axial vent opening closes the open end. The vessel is detachably supported on a base having a drive means engageable with the vessel for rotating the vessel about an axis substantially aligned with the vent opening and oriented between horizontal and an acute angle to horizontal and with the capped end of the vessel at least as elevated as the other end thereof. External heating means are provided for applying heat to the vessel contents through the vessel walls during rotation. The temperature in the vessel is selectively regulated by means of a temperature controller having a temperature sensing probe supported on the base in alignment with the vent opening in such manner that the opening is not blocked nor vessel rotation impeded.

Abstract: A rotary inclined tubular drier for puffing or expanding borax and a process for the production of puffed or expanded borax beads of desired physical characteristics. A rotatable tube is mounted on bearing wheels and surrounded by a fixed, close-fitting, insulated tube having electrical heating elements running lengthwise attached to its inside wall. The rotatable tube is fed continuously with granular borax feedstock by a vibratory feeder from its higher end and the puffed borax is discharged into a discharge chute from the lower end of the tube. A counter current of dry air is maintained by a suction hood at the high end of the tube, and borax is prevented from adhering to the interior of the tube by an adjustable, spring-loaded, internal scraper. The temperature of the drier is controlled by means of a pyrometer incorporated into a scraper support rod on the interior of the tube.

Abstract: A heating system for curing rocket motors includes a plurality of separate lectrical resistance heating elements such as heating rods or cal-rod heaters. The system is floor mounted and has a cantilever supported heating section that is temporarily positioned and sealed within the interior of a rocket motor. The rocket motor is then slowly rotated wherein relative rotation between the rotating rocket motor and the stationary heating section is provided. A plurality of uniquely positioned heating elements are selectively activated at predetermined power levels to tailor proper heating of all interior surfaces of the rocket motor.