A - Human Necessities – 62 – B
Patent
A - Human Necessities
62
B
18/641
A62B 23/00 (2006.01) A61M 16/06 (2006.01) B29C 44/42 (2006.01) B29C 45/14 (2006.01)
Patent
CA 1133214
ABSTRACT A method for forming a disposable face mask for medical purposes to carry out the administration of gases to a patient is disclosed and which provides a relatively soft, pliant surface that readily conforms to the patient's anatomical features in a gas-tight fit. The mask, as formed, comprises two parts; a semi- rigid cone backing to which there is affixed a cushion formed in accordance with this invention. The cushion is produced by in- jection molding a thermoplastic compound of a predetermined hard- ness. The thermoplastic compound is first combined with a blow- ing agent, and the mixed compound heated to break down the blow- ing agent to give off a gas, such as nitrogen. The heated, plasticized material is then injection molded into a mold of the desired configuration. The molding conditions, such as the vent- ing thereof, are controlled to cause formation of a small, rela- tively uniform cellular structure within the body of the finished product cushion. The control of the conditions involved in the injection molding process enables the final cell structure to be uniform and made up of cells which exhibit excellent pliant characteristics for conforming to the anatomical features of a patient.
340865
Mcallister David A.
Wallace Dean R.
Airco Inc.
Gowling Lafleur Henderson Llp
LandOfFree
Disposable face mask does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Disposable face mask, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disposable face mask will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1153938