Patents by Inventor Al Al-Shaikh

Al Al-Shaikh 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 for control of ceiling tile process
    Patent number: 4056714
    Abstract: A process for controlling the dry density of ceiling tile where a delayed measurement of thickness or caliper is compared with an off-line oven dry basis weight measurement of a previously taken sample to provide dry density which is then compared to a dry density target to yield an error signal which updates an on-line wet density indication to provide control of stock flow.
    Type: Grant
    Filed: January 13, 1976
    Date of Patent: November 1, 1977
    Assignee: Measurex Corporation
    Inventors: Al Al-Shaikh, Erik B. Dahlin
  • Method and apparatus for controlling pulp refiners
    Patent number: 3947668
    Abstract: Method and apparatus for controlling pulp refiners where a feed forward algorithm compensates for the time delay in the effective action of the base refiners which are coupled to a high frequency compensating tickler refiner by a machine chest which has a significant time lag. In addition, efficiency of the control system is enhanced by providing a simple control method for a complex series parallel matrix of base refiners where the change of specific energy is easily accomplished by a distribution algorithm.
    Type: Grant
    Filed: July 20, 1973
    Date of Patent: March 30, 1976
    Assignee: Measurex Corporation
    Inventors: Al Al-Shaikh, Erik B. Dahlin