Patents by Inventor David Charles Cumbers

David Charles Cumbers 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).

  • Bonding of structures
    Patent number: 4035219
    Abstract: A non-woven structure, method and apparatus for producing non-wovens; the structure having 1) between about 50 and 1000 bond points per square inch, 2) bond points with a cross sectional area of from about 1 .times. 10.sup.-.sup.5 sq. ins. to about 1 .times. 10.sup.-.sup.3 sq. ins. and 3) a bonded area of from about 1% to 20% of the total area; the process comprising forming a non-woven structure which is then passed through a pressure nip comprising a bonding member and a backing member.
    Type: Grant
    Filed: June 18, 1976
    Date of Patent: July 12, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventor: David Charles Cumbers
  • Non-woven fabrics
    Patent number: 4005169
    Abstract: A method for making a segmentally thermally bonded non woven fabric by compressing a fibrous web between heated members with different surface land patterns of isolated projections which overlap with each other to different extents in defined manner so that registration problems are avoided in manufacture and a complex surface texture is produced in the fabric.
    Type: Grant
    Filed: April 17, 1975
    Date of Patent: January 25, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventor: David Charles Cumbers
  • Calender presses
    Patent number: 3991669
    Abstract: A calender press with improved uniformity of nip pressure comprising a conventional axially located and relatively rigid roll co-operating with a hollow and relatively compliant roll, and means to support the compliant roll along its length and urge it into contact with the rigid roll.
    Type: Grant
    Filed: January 14, 1974
    Date of Patent: November 16, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventor: David Charles Cumbers