Classifications

• • A—HUMAN NECESSITIES
  • A41—WEARING APPAREL
  • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
  • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
  • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
  • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
  • A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
  • A41D13/1138—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a cup configuration
  • A41D13/1146—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a cup configuration obtained by moulding

Definitions

• the invention relates to a "filtering respiratory half mask", according to the preamble of claim 1.
• Frtering respiratory half-masks fulfill their protective task in commercial use in preventing the penetration of harmful substances into the respiratory organs of the wearer and in medical use, conversely, the passage of germs from the breathing air of medical personnel to the detriment of the patient. They have to be provided economically. This requires a simple design and the possibility of machine production.
• a known single-use breathing mask a "filtering breathing half mask” in the sense of the present invention, has a cup-shaped mask body made of a multilayer. Dust and mist filtering material.
• the mask body is shaped in such a way that there is a tight fit over the nose, cheeks and chin of the user.
• the edges of the layers of the filter material are designed to seal with one another as an edge of the mask body. Headbands are attached to the edge, which has protrusions.
• a hot-melt adhesive is used to apply an angular and protruding shape over the uppermost nose part of the mask body. preferably made of metal nose piece attached. The nose piece is pressed on after the mask is put on and is intended to hold the mask over the nose.
• the material of the mask body consists of three layers:
• the inner layer facing the face consists of interconnected plastic fibers.
• the outer layer facing away from the face consists of an intimate network of plastic fibers in a binder. In between is a medium loose filter layer of loosely mixed fibers. In the original state, these layers form a flat, sheet-like material.
• To produce the cup-shaped mask body it is pressed into the mask shape in a heated mold containing a corresponding cavity by means of a stamp. This creates the edge to which the headbands are attached after trimming. Apart from the complicated and expensive structure of the three-layer material, this is changed by the deep-drawing process in the manufacture of the mask body in an uneven and hardly manageable manner.
• the object of the invention is a "filtering respiratory half mask" which is simple in construction, remains dimensionally stable even after prolonged use, is largely insensitive to external mechanical influences and can be provided economically.
• the sensitive fibers of the filter medium are no longer shifted against each other and thereby stressed.
• the outer support layer made of the coarse-mesh plastic fabric ensures a necessary one
• the mask body 1 has the known shape of the normal half masks. The result is a comfortable, tight fit over the nose, cheeks and chin of the wearer. There is sufficient free space inside that ensures undisturbed breathing.
• the mask body 1, as the filtering part, consists of an inner homogeneous, solid and resistant filter part 2 made of a mixture of plastic and micro glass fibers.
• the filter part 2 is covered by an outer support layer 3 of the same configuration.
• the filter part 2 and the support layer 3 are connected to one another at the edge 4, thereby simultaneously forming a sealing edge, by welding or gluing.
• the preformed support layer 3 consists of a coarse-mesh fabric made of synthetic fibers with a mesh size of approximately 1.0 mm.
• a further connection of the filter part 2 to the outer support layer 3 takes place via welding or adhesive spots 5 in the depth of the mask body 1.
• a nose clip 6 also secures the seal at this point by pressing on the nose.
• a head strap 8 is held on the mask body 1 by means of eyelets 7.

Landscapes

• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Physical Education & Sports Medicine (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Respiratory Apparatuses And Protective Means (AREA)
• Gyroscopes (AREA)
• Fats And Perfumes (AREA)
• Control Of Motors That Do Not Use Commutators (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6155118

Family Applications (1)

Country Status (6)

Families Citing this family (7)

Family Cites Families (9)

• 1982
  • 1982-02-09 DE DE19823204322 patent/DE3204322A1/de not_active Ceased
• 1983
  • 1983-02-05 WO PCT/DE1983/000021 patent/WO1983002726A1/en not_active Application Discontinuation
  • 1983-02-05 EP EP83900620A patent/EP0099915A1/de not_active Ceased
  • 1983-08-30 NO NO833119A patent/NO833119L/no unknown
  • 1983-09-06 FI FI833173A patent/FI833173A0/fi not_active Application Discontinuation
  • 1983-10-06 DK DK4610/83A patent/DK461083D0/da not_active Application Discontinuation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events