The Ipari álarc was the first industrial full face mask produced in Hungary.
Mask overview[]
The early model is mainly based on the 28M military mask but the valve housing was changed to a small filter connection and an additional seam on the nose part closed the gap. The Félálarc and later the 33M got this filter connection as well.
The facepiece is of is composed of 4 rubber-coated light brown canvas sheets and formed by 7 seams, one on the chin and between the eyepieces and two between each eyepieces and the forehead part. It seals on the face via 4cm wide goat leather stitched to a rubber-coated canvas verge.
Early and late models differ in the eyepieces and harness. But both are lacking of a chinstrap.
Just like the 28M it was made in 3 sizes, size 1 being the biggest for 55 cm or bigger skull perimeter. Size 2 for between 55-53 cm, while 3 is the smallest for 53 cm or less skull perimeter.
Early model[]
Early models use the eyepieces and harness of the 28M. The shatterproof (it is composed of two glass layers and a thin sheet of cellulose between) glasses are placed between two brown painted brass parts, one of which is pressed to the facepiece permanently while the other can be screwed into this, securing the lenses and making their replacement easy. To the fixed assembly part an anti-fogging lens fixing ring can be fitted. The non-adjustable harness is composed of three pieces and sewn to the facepiece. The middle forehead straps is hooked over a metal roller frame and sewn to the outer forehead straps, so these can slide freely and automatically adjusts to the shape of the head. On the nape the temple straps and the strap of the roller frame are sewn together. There are secondary straps sewn to the base ones forming little loops, these were meant for permanent sizing by cutting the base strap. The third part near the bottom would be wrapped behind the neck of the user and hooked to the left side of the mask to provide a tight seal and to prevent accidentally taking off the mask. There is a carrying strap on the bottom back of the mask as well.
Later model[]
Later models use the eyepieces and harness of the 34M. The shatterproof (it is composed of two glass layers and a thin sheet of cellulose between) glasses are crimped to metal assemblies which are pressed to the faceblank permanently. The 7 pointed, adjustable and elasticated harness is composed of three pieces and sewn to the facepiece. The middle forehead straps is hooked over a metal roller frame and sewn to the outer forehead straps, so these can slide freely and automatically adjusts to the shape of the head. On the nape the temple straps and the strap of the roller frame are hooked up to a metal piece which is riveted to a leather pressure equalizer rectangle. The third part near the bottom would be wrapped behind the neck of the user and hooked to the left side of the mask to provide a tight seal and to prevent accidentally taking off the mask. There is a carrying strap on the bottom back of the mask.
Filter[]
Main article: Mercur industrial filters
Mercur made lightweight (szűrőbetét) and bigger (légtisztító) industrial filters were used with this mask.
External information[]
Before this mask started being used, if the factory needed a mask, foreign masks, mostly Auer 700 series masks and Dräger 200 series masks were used with their filters. Importing masks was very expensive so Mercur started to produce its own masks based on foreign designs in 1928.
Gallery[]
