METHOD OF PRODUCING HEADGEAR STRUCTURE FOR A BREATHING MASK
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United States of America Patent
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app pub date -
Oct 10, 2014
filing date -
Nov 11, 2003
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Abstract
A headband for use in supporting a breathing mask on a user's face comprises a flexible band body that is provided with upper and lower band portions. At least some portions of the band body are made of a foamed plastic material. The headband may be provided with a supporting structure made of a material in which at least some portions of the supporting structure can be individually adjusted to the shape of the back of the user's head. A method for producing the headband and the supporting structure include injecting a plastic material into a first molding tool space to form a stiffening layer, subsequently, injecting a pore-forming plastic material into a second molding tool space such that the pore-forming plastic material at least partially covers the stiffening layer to form a cushion layer.
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