Patents by Inventor Harendra Kumar Anand

Harendra Kumar Anand 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).

  • Method and apparatus for producing oriented slit film tapes
    Patent number: 8003031
    Abstract: The invention relates to a method for producing oriented slit film tapes, comprising the following steps: extruding melt polymer through a die (2); simultaneous quenching and melt-drawing of the molten polymer in the cooling device to form a film sheet (3); slitting the initial film sheet into a plurality of relatively narrow slit film tapes (4); stretching (8) at elevated temperature, by passing the slit film tapes through a heating medium (7) at a temperature just below the softening temperature of the slit film tapes; y annealing and cooling the oriented slit film tapes (10, 11); winding the slit film tapes (13); characterized in that before the stretching step, it has a stage of pre-stretching (108) made by passing the slit film tapes through one set of heated holding rollers (107) turning at a given speed and one set of cooled pre-stretch rollers (109) turning faster than the heated holding rollers, wherein at least one of the rollers of the set of holding rollers is heated and at least one of the roller
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: August 23, 2011
    Assignee: Lohia Starlinger Limited
    Inventors: Amit Kumar Lohia, Harendra Kumar Anand
  • Method and Apparatus for Producing Oriented Slit Film Tapes
    Publication number: 20080258333
    Abstract: The invention relates to a method for producing oriented slit film tapes, comprising the following steps: extruding melt polymer through a die (2); simultaneous quenching and melt-drawing of the molten polymer in the cooling device to form a film sheet (3); slitting the initial film sheet into a plurality of relatively narrow slit film tapes (4); stretching (8) at elevated temperature, by passing the slit film tapes through a heating medium (7) at a temperature just below the softening temperature of the slit film tapes; y annealing and cooling the oriented slit film tapes (10, 11); winding the slit film tapes (13); characterized in that before the stretching step, it has a stage of pre-stretching (108) made by passing the slit film tapes through one set of heated holding rollers (107) turning at a given speed and one set of cooled pre-stretch rollers (109) turning faster than the heated holding rollers, wherein at least one of the rollers of the set of holding rollers is heated and at least one of the roller
    Type: Application
    Filed: November 16, 2006
    Publication date: October 23, 2008
    Inventors: Amit Kumar Lohia, Harendra Kumar Anand