Patent ID: 9475587
Filing Date: 2016-10-25
CPC Classification: B64D,F16B

Claim Text:
1. A method for producing a lightning protection fastener with an insulating sealant layer, the lightning protection fastener comprising: a fastener member that passes through and fastens a plurality of members constituting an airframe of an aircraft; and an insulating sealant layer that is formed around the fastener member, with a jig comprising: a sealant cup that overlays a sealant to be stored in a cavity on the fastener member; a cup holder that includes a guide for determining a position of the sealant cup with respect to the fastener member; and a dummy cup that determines a position of the cup holder with respect to the fastener member, performing the method comprising: a first step of mounting the dummy cup to the fastener member; a second step of mounting the cup holder to the dummy cup by moving the guide along the dummy cup; and a third step of mounting the sealant cup to the fastener member so as to overlay the sealant on the fastener member while moving the sealant cup along the guide of the cup holder after removing the dummy cup with a relative position of the cup holder to the fastener member maintained.