FATIGUE-RESISTANT ATTACHMENT FOR HIGHLY STRESSED MEMBERS SUCH AS PRINT HAMMERS

摘要

Attachment of a relatively hard flexure member to a relatively elastic body member by a combination of mechanical anchoring and adhesive bonding is disclosed. An adhesive bond free of surface voids and affording intimate contact between an adhesive material and a thermoplastic elastic member is achieved by interfacing materials in the viscous state followed by cure to a resilient state; an attachment immune to repeated high-energy loading in tension and flexure and free of stress concentrations in the members results. Application of the attachment toward anchoring a metal spring within a plastic hammer and to a metal base member for a high-speed printer mechanism is disclosed.