Patents by Inventor Hon Sing Chum

Hon Sing Chum 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).

  • Plastic film bag to increase load bearing capacity
    Patent number: 8272782
    Abstract: A plastic bag includes a plastic bag body with 4-layer gussets on two sides and 2-layer film in the middle. The plastic bag body is provided with a curved hot-seal line near a bottom edge of the bag body. The curved hot seal line turns upward on two sides and is recessed in the middle. Since plastic bags with the structure referred to herein eliminate a stress concentration at a bottom hot-seal location, such plastic bags have increased load-bearing capacity.
    Type: Grant
    Filed: February 6, 2010
    Date of Patent: September 25, 2012
    Inventor: Hon Sing Chum
  • PLASTIC FILM BAG TO INCREASE LOAD BEARING CAPACITY
    Publication number: 20110097015
    Abstract: A plastic bag includes a plastic bag body with 4-layer gussets on two sides and 2-layer film in the middle. The plastic bag body is provided with a curved hot-seal line near a bottom edge of the bag body. The curved hot seal line turns upward on two sides and is recessed in the middle. Since plastic bags with the structure referred to herein eliminate a stress concentration at a bottom hot-seal location, such plastic bags have increased load-bearing capacity.
    Type: Application
    Filed: February 6, 2010
    Publication date: April 28, 2011
    Inventor: Hon Sing Chum