Patents by Inventor David C. Richards

David C. Richards 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).

  • Patent number: 5590512
    Abstract: A series of packages containing different sized objects are formed by pushing the objects in series into a funnel shaped portion of flexible tubing drawn from pack over the rim of a funnel. Each object pushes a preceding package from between spring-loaded jaws to take its place. Each package is closed at the top by twisting the tubing by turning the funnel fixed to the pack about its axis.
    Type: Grant
    Filed: August 24, 1995
    Date of Patent: January 7, 1997
    Assignee: Melrose Products Limited
    Inventors: David C. Richards, Maurice S. Williams, Brian Ward
  • Patent number: 5056293
    Abstract: An annular container mounted at the base of a passage between a layering tube and a central mandrel is charged with a layered tube of flexible tubing delivered over a floating mandrel when coaxially in contact with mandrel by driving rollers coacting with pinch rollers on the floating mandrel. The tubing passes over the mandrel and gathers in the layering tube while being compacted by two sets of shoes reciprocated 180.degree. out of phase by rotating discs and connecting rods. When sufficient tubing has been delivered the floating mandrel is raised to enable a hot wire to pass between the mandrels to sever the tubing. The layering tube and central mandrel with the container can then be carried by a turntable through further stationary positions where the layered tubing is further compressed by reciprocable rings, a lid is put on the container to form a cassette and the cassette is discharged.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: October 15, 1991
    Assignee: Process Improvements Limited
    Inventors: David C. Richards, Maurice S. Williams, Brian Ward
  • Patent number: 4934529
    Abstract: In a cassette for dispensing flexible tubing, the tubing is packed in a tightly layered mass between a tubular core and the vertical wall of a casing. Subsequently a cap is mounted in an expanded portion of the casing. The cap has a vertical part fitting the portion and a flange partially overlapping the pack. The cap is secured against rising by punching tongues out of the portion that engage in a groove in the part. The inner surface of part aligns with surface of casing. The junction beneath expanded portion prevents cap from descending as the tubing is dispensed from the top of the pack, over the core edge and through core.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: June 19, 1990
    Assignee: Process Improvements Limited
    Inventors: David C. Richards, Maurice S. Williams, Brian Ward
  • Patent number: 4869049
    Abstract: A pack comprising a core and pleated tubing is used to provide a series of packages each containing a disposable object such as a baby's nappy along the tubing as it passes over the top edges of the core and then down through the core. The core is turned by means of a lid about a cylinder to twist the flexible material at locations between the adjacent packs to seal the packs at their ends thereby providing hygienic disposal of the waste. A safely located rotatable cutter in the lid is provided for severing the flexible tubing above the top twist.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: September 26, 1989
    Assignee: Process Improvements Limited
    Inventors: David C. Richards, Maurice S. Williams, Brian Ward
  • Patent number: 4149339
    Abstract: Plant holder formed of flexible material and having a pocket for a plant, a water reservoir, and straps for hanging the device from a curtain rod or other suitable support.
    Type: Grant
    Filed: November 19, 1976
    Date of Patent: April 17, 1979
    Assignee: Basic Designs, Inc.
    Inventors: Charles P. Hall, David C. Richards