Patents by Inventor Subbiah Sankaran

Subbiah Sankaran has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6082659
    Abstract: Apparatus and a process for the high-speed coiling of an aluminum strip. The high speed coiling can be accomplished throughout a continuous casting process without slowing the coiling as the present invention enables the transfer of the moving strip from one coil to an empty mandrel without slowing the line speed. Since line speeds can be approximately 3600 feet per minute, this represents an advance in process technology. Generally, the transfer of the moving strip is accomplished using a very high speed knife, and a belt wrapper. The moving strip is accumulated on one mandrel to form a coil, the coil is moved away from the knife and a second mandrel is brought into position. The knife is positioned at the moving aluminum strip and accelerated to cut the strip and deflect it to a tucking roll with a moving belt. The moving strip is forced around the second mandrel and starts to wind to form a coil. The completed coil is removed and the process is repeated.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: July 4, 2000
    Assignee: Kaiser Aluminum & Chemical Corp.
    Inventors: Subbiah Sankaran, Daniel P. Ranly
  • Patent number: 5638893
    Abstract: The parting agent spray system is used with a roll casting machine to reduce the parting problems associated with releasing the casting-strip from the rolls. The parting system comprises a bank of self-cleaning spray nozzles for each of the upper roll and the lower roll of the caster. Each bank of nozzles is enclosed in its own individual housing which terminates proximal to the surface of the roll, and is movably located on a track. The housing is utilized to contain any excess graphite spray and prevent it from escaping from the area around the roll caster and contaminating the surrounding environment. The nozzles are grouped into zones, each zone connected to a parting agent solution source via an influent parting agent solution line, and connected to an air source via an air supply line for controlling the flow of the parting agent solution through each of the nozzles and atomizing the same, thus allowing the nozzles in each zone to be independently manipulated.
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: June 17, 1997
    Assignee: FATA Hunter, Inc.
    Inventors: Subbiah Sankaran, Apparao Duvvuri
  • Patent number: 5439704
    Abstract: A powder coating line for coating either coiled strip or pre-sheared and punched blanks is provided. In order to coat strip a catenary portion of the strip is suspended through a powder coating subsystem which includes a powder coating booth and a curing oven. The coated strip is the recoiled onto a rewind reel. In the alternative, the strip may be stopped and sheared at an input region and presheared blanks introduced to the powder coating subsystem. The blanks are placed on a belt conveyor, which transports them into the powder coating booth. The blanks are then passed in a conveyor through the powder coating booth and over for subsequent restacking. After passing out of the oven, and before coiled or stacking occurs, the strip or blanks pass through a quench and an air dryer. The powder coating subsystem can be incorporated into a larger pre-treating, cleaning, embossing or post-processing line.
    Type: Grant
    Filed: October 27, 1993
    Date of Patent: August 8, 1995
    Assignee: Hunter Engineering Company, Inc.
    Inventors: Subbiah Sankaran, Axel W. Missing
  • Patent number: 4979556
    Abstract: Thickness of metal sheet being cast is continuously controlled by passing a light beam through the gap between the casting machine rolls and measuring the amount of light passing through. The width of the gap is controlled in response to the measured light. To prevent interference in the hostile environment of a casting machine, the light is transmitted along an enclosed path and air is blown through the enclosed path into the roll gap. Both the thickness can be controlled in this way, and the profile can be controlled by axially shifting at least one of a pair of non-cylindrical work rolls.
    Type: Grant
    Filed: April 4, 1989
    Date of Patent: December 25, 1990
    Assignee: Hunter Engineering Company, Inc.
    Inventors: Curt Braun, Subbiah Sankaran
  • Patent number: 4771991
    Abstract: A system for continuously removing and transporting trimmed edge metal scrap material in the form of a indeterminate length of ribbon from a strip edge trimming or slitting station in a strip processing line to a final disposal station wherein the trimming station can be advantageously disposed in the path of travel of the strip of metal being processed. In a preferred embodiment of the invention, the said system includes a curvilinear enclosed conveyor means, one open end of which is disposed in the area of the trimming station and the other open end of which is disposed adjacent to the disposal station for continuously capturing the trimmed edge metal scrap material from the trimming station as it is cut from the moving strip of metal and then directing it to the disposal station at the proper rate of speed.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: September 20, 1988
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventor: Subbiah Sankaran
  • Patent number: 4214467
    Abstract: This invention relates to a metal coil handling system that allows the user to fully automate operations involving the conventional unwrapping of the leading end of a coil of metal from the remainder of the metal coil and subsequently threading the said leading end of the coil through rolling mill entry rolls. The invention includes equipment for disengaging and peeling this leading end of the coil away from the remainder of the coil and for holding the peeled length of metal coil strip taut throughout the mill feeding operations. The instant handling system eliminates or minimizes frictional scratches in the body of the coil normally caused by unwrapping and rewrapping of the leading end of metal during mill feeding operations.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: July 29, 1980
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventor: Subbiah Sankaran
  • Patent number: D433206
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: October 31, 2000
    Assignee: Alcoa Inc.
    Inventor: Subbiah Sankaran