Staples and production methods
OwnerHenry Ruskininventor
Life of this patent
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Abstract
Novel glue-less staples are formed economically of sheet metal having essentially abutting but parted margins, the staples being joined to one another by localized integral connections along the margins. The connections can be of controlled size and their weakness can be controlled by mechanical working of the metal. As a specific feature, the connections can be formed to provide the standard bond strength found in glued rows of staples, so that the novel strips of staples can be made for use in conventional tackers and staplers.
Claims19
The method of making staples, including the steps of modifying sheet metal to define the outlines of a succession of staples, the modification including the step of forming parallel grooves defining at least part of the lateral margins of the staples, shifting successive first, second and third portions of each defined staple in opposite directions out of the plane of the sheet metal while shifting the first, second and third portions of each staple in opposite directions in relation to the first, second and third portions, respectively, of its neighboring staples sufficiently to part the relatively shifted portions and leaving neighboring staples connected to each other at only two grooved locations situated respectively between said first and second portions and between said second and third portions of each neighboring pair of staples, the first, second and third portions of each staple being so close to one another that relatively shifting the neighboring staples as aforesaid leaves each staple and its neighbor connected only by grooved and twisted metal at said two locations, restoring lateral alignment of the respective portions of successive staples, and making two bends in each said second portion to define a crown and a pair of at least partially erect legs extending from the crown with the connections between successive staples located along the legs thereof.
A row of metal staples, each staple and the next in the row having elongated lateral surfaces substantially in abutment with each other but disconnected from each other, each staple and the next in the row having a crown and a pair of legs extending from the ends of the crown at least partially erect therefrom;
- and having one localized integral connection interrupting said lateral surfaces of each leg of each staple and corresponding legs of the neighboring staples, said row of staples being formed by the method including the steps of modifying sheet metal to define the outlines of a succession of staples, the modification including the step of forming parallel grooves defining at least part of the lateral margins of the staples, shifting successive first, second and third portions of each defined staple in opposite directions out of the plane of the sheet metal while shifting the first, second and third portions of each staple in opposite directions in relation to the first, second and third portions, respectively, of its neighboring staples sufficiently to part the relatively shifted portions and leaving neighboring staples connected to each other at only two grooved locations situated respectively between said first and second portions and between said second and third portions of each neighboring pair of staples, the first, second and third portions of each staple being so close to one another that relatively shifting the neighboring staples as aforesaid leaves each staple and its neighbor connected only by grooves and twisted metal at said two locations, restoring lateral alignment of the respective portions of successive staples, and making two bends in each said second portion to define a crown and a pair of at least partially erect legs extending from the crown with the connections between successive staples located along the legs thereof.
Dependencies are inferred from the claim text.