Chain – staple – and horseshoe making – Staple making
Patent
1994-02-07
1995-04-11
Jones, David
Chain, staple, and horseshoe making
Staple making
59 75, 59 77, B21G 702
Patent
active
054047072
ABSTRACT:
A fastening element is constructed from a first bar-shaped member (12), wherein a second bar-shaped member (14a ) and a third bar-shaped member (14b ) extend in parallel along a direction normal to the axial direction of the first bar-shaped member (12). The first bar-shaped member (12) has respective ends in which flat or bent slanted portions (18a, 18b ) are formed. The first bar-shaped member is formed additionally with first and second ribs (20a, 20b ) which extend outwardly beyond respective connecting positions between the first bar-shaped member and the second and third bar-shaped members (14a, 14b. ) The fastening element is formed from a U-shaped member which is positioned in a main die (36 ) such that a bent portion of the U-shaped body (40 ), corresponding to the first bar-shaped member, is positioned above the an upper surface of the main die, and wherein respective ends of the legs of the U-shaped body, corresponding to the second and third bar-shaped members, contact an auxiliary die (38 ) disposed beneath the main die. A pressing die is forcibly lowered into contact with the U-shaped member for forcing respective sides thereof outwardly to form the first and second ribs. At a time after pressing commences but before the upper pressing die has completed pressing the first bar-shaped member, the auxiliary die is lowered thereby allowing the second and third bar-shaped members to yield while the first bar-shaped member is being pressed.
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patent: 4037403 (1977-07-01), Lanz et al.
Guss Paul A.
Jones David
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