Fastening method, apparatus and article

Apparatus for setting blind fasteners having a flange end, a barrel portion and an aperture therethrough in a plurality of pieces of material, which comprises:

• a housing,
• a nosepiece mounted in the housing and having means thereon for setting the flange end of a fastener when the fastener is driven thereagainst,
• means for engaging and setting the barrel end of the fastener and driving it in a rectilinear path toward the nosepiece for the setting of the flange end, and
• means mounted concentrically with the nosepiece for engaging and biasing the material on the fastener together prior to the setting of the flange

Apparatus for setting blind fasteners having a flange end, a barrel portion and an aperture therethrough in a plurality of pieces of material, which comprises:

• a housing,
• a nosepiece mounted in the housing and having means thereon for setting the flange end of a fastener when the fastener is driven thereagainst,
• means for engaging and setting the barrel end of the fastener and driving it in a rectilinear path toward the nosepiece for the setting of the flange end, and
• an annular resilient member mounted to the housing, surrounding the nosepiece and extending toward the pieces of material on the fastener for biasing the pieces of material on the fastener together prior to the

Apparatus for setting blind fasteners having a flange end, a barrel portion and an aperture therethrough in a plurality of pieces of material, which comprises:

• a housing,
• a nosepiece mounted in the housing having an aperture therethrough and a front portion having sharp ridges thereon,
• an expandible mandrel assembly mounted for reciprocal movement in said housing, said mandrel assembly extending out from the aperture in the nosepiece and being adaptable to receive a fastener thereon, the mandrel assembly being sized such that the front of the assembly extends out of the front of the fastener when a fastener is mounted thereon,
• means for expanding the mandrel assembly to engage and set the front of the fastener,
• means for driving the mandrel assembly with the fastener engaged thereon rearwardly until the rear of fastener is driven into the front of the nosepiece, the sharp ridges on the nosepiece being operable to slit the rear of the fastener and peel back the segments thereof until the rear of the fastener is set against the pieces of material, and
• an annular resilient member mounted to the front of the housing, surrounding the nosepiece and extending toward the pieces of material mounted on the fastener, said annual resilient member being operable to engage the pieces of material and bias them together prior to the setting

Apparatus for setting blind fasteners having a flange end, a barrel portion and an aperture therethrough in a plurality of pieces of material, which comprises:

• a housing,
• a nosepiece mounted in the housing having an aperature therethrough and a front portion having sharp ridges thereon,
• means for driving the mandrel rearwardly to set the front of the fastener by driving the enlarged head of the mandrel against it, and to drive the fastener thereon rearwardly until the rear of the fastener is driven into the front of the nosepiece, the sharp ridges on the nosepiece being operable to slit the rear of the fastener and peel back the segments thereof until the rear of the fastener is set against the pieces of material, and
• an annular resilient member mounted to the front of the housing, surrounding the nosepiece and extending toward the pieces of material mounted on the fastener, said annual resilient member being operable to engage the pieces of material and bias them together prior to the setting of the rear of the fastener.