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 In the manufacture of the masks, the porous material is continuously withdrawn from a roll thereof by drive rollers and advanced through a sewing machine where the line of stitches is continuously sewn along each of the opposite side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.
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 sewn to said material along both side edges at an inwardly spaced location from said edges, and a length of cord at each side edge secured to said material by the line of stitches thereat without said cord penetrating the porous material and without said stitches penetrating said cord, each length of said cord having opposite spaced ends which are interwoven with said line of stitches to be anchored to said porous material along said side edges, said cord having a free intermediate portion between said ends which forms an ear loop, said elastic material being sewn to said porous material and interwoven with said cord lengths when the porous material is taut such 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.
Claim 2
Dependent Claim
168 words
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 sewn to said material along both side edges at an inwardly spaced location from said edges, and a length of cord at each side edge secured to said material by the line of stitches thereat without said cord penetrating the porous material and without said stitches penetrating said cord, each length of said cord having opposite spaced ends which are interwoven with said line of stitches to be anchored to said porous material along said side edges, said cord having a free intermediate portion between said ends which forms an ear loop, said elastic material being sewn to said porous material and interwoven with said cord lengths when the porous material is taut such 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.
Claim 3
Dependent Claim
29 words
A face mask as claimed in claim 1 wherein said cord is constituted of elastic material and also serves to gather and contract the material at said side edges.
Claim 4
Dependent Claim
37 words
A face mask as claimed in claim 1 wherein each said loop has an open end at the line of stitches which is substantially less in extent than the length of the material at said side edge.
Claim 5
Dependent Claim
32 words
A face mask as claimed in claim 3 wherein said length of cord has the form of a U-shape with outwardly splayed ends corresponding to said ends anchored to the porous material.
Claim 6
Dependent Claim
26 words
A face mask as claimed in claim 2 wherein each said cord alternately passes on opposite sides of the associated line of stitches in sinusoidal fashion.