Apparatus and method for the manufacture of face masks

Details Apparatus and method for the manufacture of face masks Apparatus and method for the manufacture of face masks

1974-12-30

1976-06-01

Schroeder, Werner H.

Sewing

Special machines

Darning

112265, 2 9, D05B 1900

Patent

active

039600963

ABSTRACT:
A face mask comprising an elongated sheet of porous material having upper and lower longitudinal edges and transverse side edges. A line of stitches of elastic material is sewn to the material along both its side edges, and a length of elastic cord at each side edge is secured to the material by interweaving with the line of stitches thereat. A free intermediate portion of the elastic cord is formed between the ends at which the cord is interwoven with the stitches to the porous material, and the free intermediate portion forms an ear loop. The elastic material is sewn to the porous material and interwoven with the cord lengths while the porous material is taut so that when the porous material is relaxed, the elastic material exerts a pull on the porous material to gather and contract the material at the side edges. In the manufacture of the masks, the porous material is continuously withdrawn from a roll thereof by drive rollers and advanced through a sewing machine where the line of stitches is continuously sewn along each of the opposite side edges of the material while the material is taut. The cord is periodically interwoven along each side edge with the line of stitches, and a cutter downstream of the sewing machine cuts the porous material transversely thereof at successive spaced locations at which the cord is interwoven with the line of stitches.

REFERENCES:
patent: 2494406 (1950-01-01), Reitano
patent: 3084641 (1963-04-01), Phillips et al.
patent: 3580198 (1971-05-01), Teed et al.
patent: 3750605 (1973-08-01), Warburton et al.

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