Patents by Inventor D. Deepak Chadha

D. Deepak Chadha 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).

  • Apparatus for finishing paper
    Patent number: 5649478
    Abstract: A method and apparatus are disclosed for finishing a web of paper, paperboard or the like to achieve enhanced stiffness with a minimal loss of caliper or bulk. For this purpose, liquid spray devices are substituted for the conventional waterboxes of a machine calender. These devices permit the independent control of the thickness of liquid films applied to the transfer rolls of the calender with greater uniformity. The liquid films are transferred to the surfaces of the web at transfer nips. The method produces an I-beam effect in the web with highly densified and smooth surface layers and a bulky interior to maximize stiffness.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: July 22, 1997
    Assignee: Westvaco Corporation
    Inventor: D. Deepak Chadha
  • Method and apparatus for finishing paper
    Patent number: 5607553
    Abstract: A method is disclosed for finishing a web of paper, paperboard or the like to achieve enhanced stiffness with a minimal loss of caliper or bulk. For this purpose, liquid spray devices are substituted for the conventional waterboxes of a machine calender. These devices permit the independent control of the thickness of liquid films applied to the transfer rolls of the calender with greater uniformity. The liquid films are transferred to the surfaces of the web at transfer nips. The method produces an I-beam effect in the web with highly densified and smooth surface layers and a bulky interior to maximize stiffness.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: March 4, 1997
    Assignee: Westvaco Corporation
    Inventor: D. Deepak Chadha