Abstract: A method of preparing an inflatable pad for a face mask in which a former (3) is coated with a curable composition which is cured to provide an elastic air-impermeable sheath (4) of rubber or like polymer which does not adhere to the former, thereby defining an inflation chamber. The former comprises a sheet of flexible material, e.g. polymer foam and remains within the pad in use thereby avoiding the conventional operations of slitting the air-impermeable sheath, removing the former and resealing the air-impermeable sheath.
Abstract: A method of forming a cuff on a self-retaining catheter of the type described comprising fitting a tube of thermoplastic material around the main shaft of the catheter, bonding the ends of the tube to the shaft, surrounding the tube with a mould, inflating the tube and heating the mould.
July 14, 1976
Date of Patent:
June 6, 1978
Warne Surgical Products Limited
Reginald William Harrison, George Albert Peach