RONALD D ROTHCHILD
Engineering in South Orange, NJ

4118873, Oct 10, 1978

Dec 13, 1976

5/749951

Ronald D. Rothchild - South Orange NJ

Airco, Inc. - Montvale NJ

B01K 500

34 36

A method and apparatus for inerting the atmosphere adjacent a moving product surface such as a resin bearing web material includes passing the product through a device having entrance and exit tunnels and a treatment chamber therebetween at speeds up to 1,000 ft. per minute or greater. An inert gas flow is introduced into the entrance tunnel at a velocity relative to the velocity of the moving product surface such that a turbulent condition is established in the boundary layer of air dragged into the entrance tunnel by the moving product. Turbulence in the boundary layer promotes the rapid diffusion of atmospheric oxygen upwardly away from the moving product surface. The inert gas flow is of a magnitude sufficient to maintain oxygen concentration at the tunnel entrance at less than 20. 8% thereby enabling such diffusion of oxygen. For slowly moving product surfaces, a high velocity cross flow inert gas stream is provided to establish a resultant relative velocity capable of generating the requisite turbulence.

4223450, Sep 23, 1980

Jul 5, 1979

6/055226

Ronald D. Rothchild - South Orange NJ

Airco, Inc. - Montvale NJ

F26B 328

34 16

A chamber is isolated from ambient atmosphere by supplying a flow of inert gas to the entrance and/or exit of the chamber such as an oven for curing solvent borne resin coatings on a material passed therethrough. The inert gas is supplied at a substantially constant mass flow rate through an orifice which may be adjusted in opening or direction so as to enable the momentum of discharged inert gas to be controlled. A flow of gas is exhausted exteriorly of but in the vicinity of the chamber exit or entrance and the oxygen content of such flow is sensed. The sensed oxygen value is compared with a predetermined value and the difference is utilized to adjust the orifice to either increase or decrease the momentum of inert gas discharged therefrom. In this manner atmospheric oxygen is precluded from entering the chamber while only the amount (flow) of inert gas necessary to block such oxygen is utilized thereby minimizing the loss of inert gas from the chamber to ambient.

4033502, Jul 5, 1977

Jun 26, 1975

5/590423

Ronald D. Rothchild - South Orange NJ

B23K 2300

228 56

A coupling device is disclosed for rapidly and ecnomically mechanically joining a pair of elongated structural elements such as reinforcing bars in the field. The cylindrical couplingdevice includes an outer annular chamber containing porous substance which can be made to react exothermically, such as a mixture of aluminum and iron oxide powder which releases molten material, e. g. iron, upon being activated. The mass of exothermic material includes air in a quantity determined by the material's porosity when packed into the outer annular chamber. When the exothermic material is made to react, it heats the contained air and causes it to expand and act as a propellant, which causes molten iron from the exotheric reaction to be propelled from the outer chamber into an interior cylindrical chamber or chambers which contain the ends of the reinforcing bars. The flow speed and amount of propelled molten material deposited in the gap are regulated by: the dimensions of the passageways between inner and outer chambers, the radial clearance gap between the reinforcing bars and the inside surfaces of the inner chambers, and length of the inner chambers. When these parameters are properly adjusted, especially the size and number of passageways between outer and inner chambers, then molten material propelled into the radial clearance gap solidifies therein to produce solid masses of iron which funtcion as keying elements to join the reinforcing bars to the coupler.

4237700, Dec 9, 1980

Apr 20, 1979

6/031718

Ronald D. Rothchild - South Orange NJ

Airco, Inc. - Montvale NJ

F17C 702

62514R

The refrigeration available in a liquefied gas is utilized to refrigerate a fluid having a boiling point above the boiling point of the liquefied gas which is sprayed into an endless conduit such that the liquefied gas is vaporized. The resulting thermal currents and momentum of the spray are effective to provide the motive power for circulating the gas throughout the conduit and into indirect heat exchange with the fluid to be refrigerated. The temperature of heat exchange means in the vicinity of the location at which the fluid is introduced into such indirect heat exchange may be regulated by controlling the magnitude of the gas flow throughout the conduit to thereby avoid freezing of components of such fluid. The use of shaft power (such as a fan or blower) for circulating the gas flow throughout the conduit is avoided and the utilization of refrigeration available in the liquefied gas is improved accordingly.

4377173, Mar 22, 1983

Mar 18, 1981

6/244847

Ronald D. Rothchild - South Orange NJ

Airco, Inc. - Montvale NJ

A24B 318

131291

Tobacco impregnated with solid carbon dioxide is heated in a chamber to expand the same by sublimation of solid CO. sub. 2 and expulsion of CO. sub. 2 gas from the tobacco. The expanded tobacco is separated from the internal atmosphere of the expansion device and the tobacco is discharged through an outlet through which gas flows are substantially precluded. The evolved CO. sub. 2 gas and other volatile components are removed from the chamber and a portion of the removed gas is heated and returned to the chamber as the expansion medium. The necessity for external steam is avoided as an atmosphere of high thermal diffusivity is maintained in the expansion chamber by precluding the entry of ambient air.

4308876, Jan 5, 1982

Feb 16, 1979

6/013484

Ronald D. Rothchild - South Orange NJ

Airco, Inc. - Montvale NJ

A24B 318

131293

Tobacco impregnated with solid carbon dioxide is heated in a chamber to expand the same by sublimation of solid CO. sub. 2 and expulsion of CO. sub. 2 gas from the tobacco. The expanded tobacco is separated from the internal atmosphere of the expansion device and the tobacco is discharged through an outlet through which gas flows are substantially precluded. The evolved CO. sub. 2 gas and other volatile components are removed from the chamber and a portion of the removed gas is heated and returned to the chamber as the expansion medium. The necessity for external steam is avoided as an atmosphere of high thermal diffusivity is maintained in the expansion chamber by precluding the entry of ambient air.

4424680, Jan 10, 1984

Nov 9, 1981

6/319329

Ronald D. Rothchild - South Orange NJ

F17C 1100

62 48

Method and apparatus for recovering, as liquid, condensable vapor contained in a gas stream by refrigerating the gas stream by injecting the liquified phase of an inert gas, such as nitrogen, mixing the combined gas stream and liquified inert has, and separating the condensed condensable vapor from the remaining gas stream and inert gas.

4625736, Dec 2, 1986

Jul 13, 1983

6/513428

Ronald D. Rothchild - South Orange NJ

A24B 318

131296

A method and preferred apparatus for expanding moisture containing tobacco. Tobacco is very rapidly heated by a stream of heated gas, by contacting a high speed downdraft flow of said gas with said tobacco while said tobacco is in transit on a gas porous conveyer. The conveyer is preferably configured as a cylindrical drum with a gas porous cylindrical surface, rotating about its axis.

4150494, Apr 24, 1979

Aug 29, 1977

5/828375

Ronald D. Rothchild - South Orange NJ

Airco, Inc. - Montvale NJ

F26B 304

34 28

methods and apparatus for recovering hydrocarbon solvents evaporated during the curing of solvent borne coatings in an oven include supplying an inert gas to the vicinity of the oven entrance and exit to substantially exclude oxygen therefrom while safely maintaining a solvent vapor partial pressure within the oven of at least 75% of the lower explosive limit of such vapor in air. The oven atmosphere is exhausted and passed to a condenser to enable recovery of at least 85% of the solvent vapor as a liquid. Preferably, condensation of the solvent vapor is effected by heat exchange with liquid nitrogen which is effective to vaporize the liquid nitrogen to produce nitrogen gas which may then be utilized to exclude oxygen from and to inert the oven.

4431011, Feb 14, 1984

Sep 23, 1981

6/304713

Ronald D. Rothchild - South Orange NJ

A24B 318

131296

The present invention relates to a method for increasing the filling power of tobacco by intense convection heating of moistened, and possibly frozen, tobacco in a gas with steam as its major component.