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Title:
呼吸器保護装置およびその作製方法
Document Type and Number:
Japanese Patent JP4130474
Kind Code:
B2
Abstract:
Fold-flat personal respiratory protection devices are provided. The devices have a flat central portion having first and second edges, a flat first member joined to the first edge of the central portion through either a fold-line, seam, weld or bond, said fold, bond, weld or seam of the first member being substantially coextensive with said first edge of said central portion, and a flat second member joined to the second edge of the central portion through either a fold-line, seam, weld or bond, the fold, bond, weld or seam of the second member being substantially coextensive with said second edge of said central portion. At least one of the central portion and first and second members are formed from filter media. The device is capable of being folded flat for storage with the first and second members being in at least partial face-to-face contact with a common surface of the central portion and, during use, is capable of forming a cup-shaped air chamber over the nose and mouth of the wearer with the unjoined edges of the central portion and first and second members adapted to contact and be secured to the nose, cheeks and chin of the wearer. The outer boundary of the unjoined edges which are adapted to contact the nose, cheeks and chin of the wearer are less than the perimeter of the device in the flat folded storage state. Also provided are processes for preparing such devices.

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Inventors:
Bostock, Graham, Jay.
Bryant, John, W.
Curran, Desmond, Tea.
Henderson, Christopher, Pee.
Kruger, Dennis, Elle.
Dirad, James, F.
Application Number:
JP52770696A
Publication Date:
August 06, 2008
Filing Date:
March 08, 1996
Export Citation:
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Assignee:
3M COMPANY
International Classes:
A41D13/11; A62B18/02; A62B7/10; A62B23/02
Domestic Patent References:
JP6142223A
JP61272063A
JP5171556A
JP58124639A
JP2234967A
JP5220313A
JP3063046A
JP55021988A
Foreign References:
US4920690
US5322061
EP0183059A1
US4215682
US5325892
US5020533
US4825878
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Hirose Shigeki
Yoshimitsu Mizumoto