File fastener method of manufacture
AssigneePress Engineering (Proprietary) Limited
InventorMurray B. Blumberg
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a file fastener from a flat metal strip having top and bottom surfaces with narrow side surfaces therebetween, includes providing an elongate body portion. A prong extends from each end of the body portion, with at least the side surfaces of the prongs having a protective coating. The invention extends to a method of manufacturing a string of file fasteners, each file fastener being of a flat metal strip having an elongate body portion. A prong extends from each end of the body portion, with the file fasteners being connected via frangible bridges.
Claims9
A method of manufacturing a file fastener, which is of a flat metal strip having an elongate body portion with a prong extending from each end of the body portion, each prong being narrower than the body portion and with each prong terminating in a tip, the body portion and the prongs having top and bottom surfaces and narrow side surfaces therebetween, the method including the steps of:
- parting the prongs from a sheet of metal in a first operation to provide a central sheet with the prongs of unformed fasteners extending from the central sheet;
- applying a protective coating to substantially the entire side surfaces of the prongs and their tips in a second operation;
- and
- parting the body portions from the central sheet in a third operation.
Dependencies are inferred from the claim text.