Method for making a disposable face respirator
Abstract
Abstract A PROCESS OF SIMULTANEOUSLY FORMING AN ATTACHING THE FILTER MEDIUM TO THE FACE PIECE IS ALSO DISCLOSED. THE PROCESS COMPRISES DEPOSITING A FIRST THIN LAYER OF SOLIDS FROM AN AQUEOUS SLURRY ONTO A FORAMINOUS SUCTION MOLD HAVING THE SURFACE CONTOURS DESIRED FOR THE INTERIOR OF THE FILTER MEDIUM, PLACING A FACE PIECE HAVING AN INTEGRALLY FORMED APERTURED LIP OFER THE MOLD AND THE FIRST LAYER, DEPOSITING A SECOND THIN FIBROUS LAYER OF SOLIDS FROM AN AQUEOUS SLURRY ON THE OUTSIDE SURFACE OF THE FIRST LAYER, ON THE OUTSIDE SURFACE OF THE APERTURE LIP AND WITHIN THE APERTURES IN THE LIP. IN A PREFERRED PROCESS, TWO FIBROUS BACKING LAYERS ARE PROVIDED IN THIS MANNER AND A FIBROUS FILTER LAYER IS DEPOSITED FROM AN AQUEOUS SLURRY ON THE OUTSIDE SURFACE OF THE SECOND FIBROUS BACKING LAYER AND WITHIN AN UNDERCUT AREAS PROVIDED IN THE APERTURED LIP. AN ADDITIONAL FIBROUS PROTECTING LAYER IS PREFERABLY DEPOSITED ON THE OUTSIDE SURFACE OF THE FILER LAYER FROM AN AQUEOUS SLURRY.
Inventors
- 👤 G Reimschussel
- 👤 J Prins
Bibliographic Details
Claims Analysis
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