Strapping head with strap tail-flattening capability

Details Strapping head with strap tail-flattening capability Strapping head with strap tail-flattening capability

1991-04-07

1992-03-24

Larson, Lowell A.

Wireworking

Applying wire

Binder tightening and joining implements

1401236, 140152, B21F 1100

Patent

active

050978748

ABSTRACT:
In a strapping head, slitting dies and a slitting punch on a punch holder cooperate to make a sealless connection in two overlapped layers of a tensioned loop of steel strap. A sealing yoke moves the punch holder via a connection allowing lost motion between the sealing yoke and the punch holder. A strap cutter on a cutter holder and an anvil cooperate to cut an outer layer of the tensioned loop. The sealing yoke moves the cutter holder via a connection allowing lost motion between the sealing yoke and the cutter holder. A spring member biases the strap cutter in a forward direction, via a plunger engaging the strap cutter upon forward motion of the sealing yoke for a sufficient distance to take up lost motion between the sealing yoke and the cutter holder, whereby overtravel of the strap cutter flattens the strap tail.

REFERENCES:
patent: 2801558 (1957-08-01), Crosby et al.
patent: 3241579 (1966-03-01), Partridge
patent: 4791968 (1988-12-01), Pearson
patent: 4825512 (1989-05-01), Tremper et al.

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